Spring HATEOAS RepresentationModel，無法設置屬性鏈接，因為沒有設置器，沒有枯萎，並且它不是持久性構造函數的一部分
[英]Spring HATEOAS RepresentationModel, Cannot set property links because no setter, no wither and it's not part of the persistence constructor
問題描述
目標：我只是想在 Spring HATEOAS 應用程序的 REST 端點上調用 get 調用。 這是一個以MongoDB為數據庫的簡單項目。
預期結果：當我嘗試從 REST 控制器類調用 Get 端點時，應該返回適當的響應。
實際結果：無法調用 Get 端點，使用郵遞員調用時出現內部服務器錯誤。
下面是我試圖調用的 REST 端點
localhost:8086/api/customers
下面是錯誤響應
{
"timestamp": "2020-09-01T17:34:28.779+00:00",
"status": 500,
"error": "Internal Server Error",
"message": "",
"path": "/api/customers"
}
我嘗試過的：基本上我的 Spring 啟動應用程序嘗試執行客戶和訂單功能的 CRUD 操作。 最初，我已將一些示例數據預加載到 mongodb 數據庫中。 當我運行應用程序時，我可以看到來自 MongoDB 指南針的所有數據。 我的應用程序啟動時沒有任何錯誤。 但是當我嘗試調用任何 REST 端點時，它給了我一個錯誤。
下面是完整的堆棧跟蹤。
2020-09-01 23:03:11.446 INFO 15824 --- [ main] com.devzigma.DemoApplication : Starting DemoApplication on SLL014289 with PID 15824 (D:\Java-excersie\spring-hateoas-baeldung - with mongo\target\classes started by buddhika_jayakodi in D:\Java-excersie\spring-hateoas-baeldung - with mongo)
2020-09-01 23:03:11.449 INFO 15824 --- [ main] com.devzigma.DemoApplication : No active profile set, falling back to default profiles: default
2020-09-01 23:03:12.192 INFO 15824 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2020-09-01 23:03:12.288 INFO 15824 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 91ms. Found 2 MongoDB repository interfaces.
2020-09-01 23:03:12.994 INFO 15824 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8086 (http)
2020-09-01 23:03:13.005 INFO 15824 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-09-01 23:03:13.005 INFO 15824 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-09-01 23:03:13.177 INFO 15824 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-09-01 23:03:13.177 INFO 15824 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1650 ms
2020-09-01 23:03:13.320 INFO 15824 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2020-09-01 23:03:13.371 INFO 15824 --- [localhost:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:164}] to localhost:27017
2020-09-01 23:03:13.375 INFO 15824 --- [localhost:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=9, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2701575}
2020-09-01 23:03:14.086 INFO 15824 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-09-01 23:03:14.287 INFO 15824 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8086 (http) with context path ''
2020-09-01 23:03:14.298 INFO 15824 --- [ main] com.devzigma.DemoApplication : Started DemoApplication in 3.483 seconds (JVM running for 4.443)
2020-09-01 23:03:14.338 INFO 15824 --- [ main] org.mongodb.driver.connection : Opened connection [connectionId{localValue:2, serverValue:165}] to localhost:27017
2020-09-01 23:04:28.673 INFO 15824 --- [nio-8086-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-09-01 23:04:28.673 INFO 15824 --- [nio-8086-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-09-01 23:04:28.677 INFO 15824 --- [nio-8086-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 4 ms
2020-09-01 23:04:28.754 ERROR 15824 --- [nio-8086-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: Cannot set property links because no setter, no wither and it's not part of the persistence constructor public com.devzigma.model.Order()!] with root cause
java.lang.IllegalStateException: Cannot set property links because no setter, no wither and it's not part of the persistence constructor public com.devzigma.model.Order()!
at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor.setProperty(InstantiationAwarePropertyAccessor.java:118) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.model.ConvertingPropertyAccessor.setProperty(ConvertingPropertyAccessor.java:63) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readProperties(MappingMongoConverter.java:450) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.populateProperties(MappingMongoConverter.java:367) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:347) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:317) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readMap(MappingMongoConverter.java:1187) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:288) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue(MappingMongoConverter.java:1580) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$MongoDbPropertyValueProvider.getPropertyValue(MappingMongoConverter.java:1478) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readProperties(MappingMongoConverter.java:450) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.populateProperties(MappingMongoConverter.java:367) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:347) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:317) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:250) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:246) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:98) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate$ReadDocumentCallback.doWith(MongoTemplate.java:3141) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal(MongoTemplate.java:2788) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:2518) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:2500) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.find(MongoTemplate.java:856) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:383) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:205) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:55) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.data.repository.core.support.ImplementationInvocationMetadata.invoke(ImplementationInvocationMetadata.java:72) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:382) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:205) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:549) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:155) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:130) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at com.sun.proxy.$Proxy60.findAll(Unknown Source) ~[na:na]
at com.devzigma.services.CustomerServiceImpl.allCustomers(CustomerServiceImpl.java:24) ~[classes/:na]
at com.devzigma.controller.CustomerController.getAll(CustomerController.java:38) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_221]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_221]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_221]
下面是CustomerController類。
package com.devzigma.controller;
import com.devzigma.model.Customer;
import com.devzigma.model.Order;
import com.devzigma.services.CustomerService;
import com.devzigma.services.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.hateoas.CollectionModel;
import org.springframework.hateoas.Link;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Optional;
import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.linkTo;
import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.methodOn;
@RestController
@RequestMapping("/api")
public class CustomerController {
@Autowired
private CustomerService customerService;
@Autowired
private OrderService orderService;
@GetMapping(value = "/customers/{customerId}")
public Optional<Customer> getCustomerById(@PathVariable String customerId) {
return customerService.getCustomerDetail(customerId);
}
@GetMapping(value = "/customers")
public List<Customer> getAll() {
return customerService.allCustomers();
}
}
下面是模型包的Customer和Order類
Customer.java 類
package com.devzigma.model;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.hateoas.RepresentationModel;
import java.util.Map;
@Document
public class Customer extends RepresentationModel<Customer> {
private String customerId;
private String customerName;
private String companyName;
private Map<String, Order> orders;
public Customer() {
}
public Customer(String customerId, String customerName, String companyName) {
this.customerId = customerId;
this.customerName = customerName;
this.companyName = companyName;
}
public String getCustomerId() {
return customerId;
}
public void setCustomerId(String customerId) {
this.customerId = customerId;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public String getCompanyName() {
return companyName;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public Map<String, Order> getOrders() {
return orders;
}
public void setOrders(final Map<String, Order> orders) {
this.orders = orders;
}
@Override
public String toString() {
return "Customer{" +
"customerId='" + customerId + '\'' +
", customerName='" + customerName + '\'' +
", companyName='" + companyName + '\'' +
", orders=" + orders +
'}';
}
}
然后是 Order.java 類
package com.devzigma.model;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.hateoas.RepresentationModel;
@Document
public class Order extends RepresentationModel<Order> {
private String orderId;
private double price;
private int quantity;
public Order() {
}
public Order(String orderId, double price, int quantity) {
this.orderId = orderId;
this.price = price;
this.quantity = quantity;
}
public String getOrderId() {
return orderId;
}
public void setOrderId(String orderId) {
this.orderId = orderId;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
@Override
public String toString() {
return "Order{" +
"orderId='" + orderId + '\'' +
", price=" + price +
", quantity=" + quantity +
'}';
}
}
下面是擴展 MongoRepository<> 的兩個存儲庫接口
客戶資料庫
package com.devzigma.repository;
import com.devzigma.model.Customer;
import org.springframework.data.mongodb.repository.MongoRepository;
public interface CustomerRepository extends MongoRepository<Customer, String> {
}
訂單庫
package com.devzigma.repository;
import com.devzigma.model.Order;
import org.springframework.data.mongodb.repository.MongoRepository;
public interface OrderRepository extends MongoRepository<Order, String> {
}
在服務包中，我有 CustomerService 和 OrderService 接口以及它們各自的實現。
CustomerService及其實現
package com.devzigma.services;
import com.devzigma.model.Customer;
import java.util.List;
import java.util.Optional;
public interface CustomerService {
Optional<Customer> getCustomerDetail(String id);
List<Customer> allCustomers();
}
package com.devzigma.services;
import com.devzigma.model.Customer;
import com.devzigma.repository.CustomerRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.*;
@Service
public class CustomerServiceImpl implements CustomerService {
@Autowired
private CustomerRepository customerRepository;
@Override
public Optional<Customer> getCustomerDetail(String id) {
return customerRepository.findById(id);
}
@Override
public List<Customer> allCustomers() {
return customerRepository.findAll();
}
}
然后是 OrderService 及其實現
package com.devzigma.services;
import com.devzigma.model.Order;
import java.util.Optional;
public interface OrderService {
Optional<Order> getAllOrdersForCustomer(String customerId);
}
package com.devzigma.services;
import com.devzigma.model.Order;
import com.devzigma.repository.CustomerRepository;
import com.devzigma.repository.OrderRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.*;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private CustomerRepository customerRepository;
@Autowired
private OrderRepository orderRepository;
@Override
public Optional<Order> getAllOrdersForCustomer(String customerId) {
return orderRepository.findById(customerId);
}
}
在我的主類中，我實現了 CommandLineRunner，以便我可以用示例數據填充 MongoDB 數據庫。
下面是主類。
package com.devzigma;
import com.devzigma.model.Customer;
import com.devzigma.model.Order;
import com.devzigma.repository.CustomerRepository;
import com.devzigma.repository.OrderRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.util.HashMap;
@SpringBootApplication
public class DemoApplication implements CommandLineRunner {
@Autowired
private CustomerRepository customerRepository;
@Autowired
private OrderRepository orderRepository;
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
@Override
public void run(String... args) throws Exception {
customerRepository.deleteAll();
orderRepository.deleteAll();
final Customer customer1 = new Customer("10A", "Jane", "ABC Company");
final Customer customer2 = new Customer("20B", "Bob", "XYZ Company");
final Customer customer3 = new Customer("30C", "Tim", "CKV Company");
HashMap<String, Order> cus1order = new HashMap<>();
cus1order.put("001A", new Order("001A", 150.00, 25));
cus1order.put("002A", new Order("002A", 250.00, 15));
customer1.setOrders(cus1order);
customerRepository.save(customer1);
customerRepository.save(customer2);
customerRepository.save(customer3);
}
}
最后，下面是我的 application.properties 文件
server.port=8086
spring.data.mongodb.authentication-database=admin
spring.data.mongodb.uri=mongodb://localhost:27017/customer-order
我知道這是很多樣板代碼。 但請耐心等待。 如果有人能告訴我如何解決作為堆棧跟蹤給出的上述錯誤，那么將不勝感激。
再會！
2 個解決方案
解決方案1
1 已采納 2020-09-01 20:23:22
目標：我只是想在 Spring HATEOAS 應用程序的 REST 端點上調用 get 調用。 這是一個以MongoDB為數據庫的簡單項目。
預期結果：當我嘗試從 REST 控制器類調用 Get 端點時，應該返回適當的響應。
實際結果：無法調用 Get 端點，使用郵遞員調用時出現內部服務器錯誤。
下面是我試圖調用的 REST 端點
localhost:8086/api/customers
下面是錯誤響應
{
"timestamp": "2020-09-01T17:34:28.779+00:00",
"status": 500,
"error": "Internal Server Error",
"message": "",
"path": "/api/customers"
}
我嘗試過的：基本上我的 Spring 啟動應用程序試圖執行客戶和訂單功能的 CRUD 操作。 最初，我已將一些示例數據預加載到 mongodb 數據庫中。 當我運行應用程序時，我可以看到來自 MongoDB 指南針的所有數據。 我的應用程序啟動時沒有任何錯誤。 但是當我嘗試調用任何 REST 端點時，它給了我一個錯誤。
下面是完整的堆棧跟蹤。
2020-09-01 23:03:11.446 INFO 15824 --- [ main] com.devzigma.DemoApplication : Starting DemoApplication on SLL014289 with PID 15824 (D:\Java-excersie\spring-hateoas-baeldung - with mongo\target\classes started by buddhika_jayakodi in D:\Java-excersie\spring-hateoas-baeldung - with mongo)
2020-09-01 23:03:11.449 INFO 15824 --- [ main] com.devzigma.DemoApplication : No active profile set, falling back to default profiles: default
2020-09-01 23:03:12.192 INFO 15824 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2020-09-01 23:03:12.288 INFO 15824 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 91ms. Found 2 MongoDB repository interfaces.
2020-09-01 23:03:12.994 INFO 15824 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8086 (http)
2020-09-01 23:03:13.005 INFO 15824 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-09-01 23:03:13.005 INFO 15824 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-09-01 23:03:13.177 INFO 15824 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-09-01 23:03:13.177 INFO 15824 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1650 ms
2020-09-01 23:03:13.320 INFO 15824 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2020-09-01 23:03:13.371 INFO 15824 --- [localhost:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:164}] to localhost:27017
2020-09-01 23:03:13.375 INFO 15824 --- [localhost:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=9, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2701575}
2020-09-01 23:03:14.086 INFO 15824 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-09-01 23:03:14.287 INFO 15824 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8086 (http) with context path ''
2020-09-01 23:03:14.298 INFO 15824 --- [ main] com.devzigma.DemoApplication : Started DemoApplication in 3.483 seconds (JVM running for 4.443)
2020-09-01 23:03:14.338 INFO 15824 --- [ main] org.mongodb.driver.connection : Opened connection [connectionId{localValue:2, serverValue:165}] to localhost:27017
2020-09-01 23:04:28.673 INFO 15824 --- [nio-8086-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-09-01 23:04:28.673 INFO 15824 --- [nio-8086-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-09-01 23:04:28.677 INFO 15824 --- [nio-8086-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 4 ms
2020-09-01 23:04:28.754 ERROR 15824 --- [nio-8086-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: Cannot set property links because no setter, no wither and it's not part of the persistence constructor public com.devzigma.model.Order()!] with root cause
java.lang.IllegalStateException: Cannot set property links because no setter, no wither and it's not part of the persistence constructor public com.devzigma.model.Order()!
at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor.setProperty(InstantiationAwarePropertyAccessor.java:118) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.model.ConvertingPropertyAccessor.setProperty(ConvertingPropertyAccessor.java:63) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readProperties(MappingMongoConverter.java:450) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.populateProperties(MappingMongoConverter.java:367) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:347) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:317) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readMap(MappingMongoConverter.java:1187) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:288) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue(MappingMongoConverter.java:1580) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$MongoDbPropertyValueProvider.getPropertyValue(MappingMongoConverter.java:1478) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readProperties(MappingMongoConverter.java:450) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.populateProperties(MappingMongoConverter.java:367) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:347) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:317) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:250) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:246) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:98) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate$ReadDocumentCallback.doWith(MongoTemplate.java:3141) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal(MongoTemplate.java:2788) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:2518) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:2500) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.find(MongoTemplate.java:856) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:383) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:205) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:55) ~[spring-data-mongodb-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.data.repository.core.support.ImplementationInvocationMetadata.invoke(ImplementationInvocationMetadata.java:72) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:382) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:205) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:549) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:155) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:130) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at com.sun.proxy.$Proxy60.findAll(Unknown Source) ~[na:na]
at com.devzigma.services.CustomerServiceImpl.allCustomers(CustomerServiceImpl.java:24) ~[classes/:na]
at com.devzigma.controller.CustomerController.getAll(CustomerController.java:38) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_221]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_221]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_221]
下面是CustomerController類。
package com.devzigma.controller;
import com.devzigma.model.Customer;
import com.devzigma.model.Order;
import com.devzigma.services.CustomerService;
import com.devzigma.services.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.hateoas.CollectionModel;
import org.springframework.hateoas.Link;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Optional;
import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.linkTo;
import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.methodOn;
@RestController
@RequestMapping("/api")
public class CustomerController {
@Autowired
private CustomerService customerService;
@Autowired
private OrderService orderService;
@GetMapping(value = "/customers/{customerId}")
public Optional<Customer> getCustomerById(@PathVariable String customerId) {
return customerService.getCustomerDetail(customerId);
}
@GetMapping(value = "/customers")
public List<Customer> getAll() {
return customerService.allCustomers();
}
}
下面是模型包的Customer和Order類
Customer.java 類
package com.devzigma.model;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.hateoas.RepresentationModel;
import java.util.Map;
@Document
public class Customer extends RepresentationModel<Customer> {
private String customerId;
private String customerName;
private String companyName;
private Map<String, Order> orders;
public Customer() {
}
public Customer(String customerId, String customerName, String companyName) {
this.customerId = customerId;
this.customerName = customerName;
this.companyName = companyName;
}
public String getCustomerId() {
return customerId;
}
public void setCustomerId(String customerId) {
this.customerId = customerId;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public String getCompanyName() {
return companyName;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public Map<String, Order> getOrders() {
return orders;
}
public void setOrders(final Map<String, Order> orders) {
this.orders = orders;
}
@Override
public String toString() {
return "Customer{" +
"customerId='" + customerId + '\'' +
", customerName='" + customerName + '\'' +
", companyName='" + companyName + '\'' +
", orders=" + orders +
'}';
}
}
然后是 Order.java 類
package com.devzigma.model;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.hateoas.RepresentationModel;
@Document
public class Order extends RepresentationModel<Order> {
private String orderId;
private double price;
private int quantity;
public Order() {
}
public Order(String orderId, double price, int quantity) {
this.orderId = orderId;
this.price = price;
this.quantity = quantity;
}
public String getOrderId() {
return orderId;
}
public void setOrderId(String orderId) {
this.orderId = orderId;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
@Override
public String toString() {
return "Order{" +
"orderId='" + orderId + '\'' +
", price=" + price +
", quantity=" + quantity +
'}';
}
}
下面是擴展 MongoRepository<> 的兩個存儲庫接口
客戶資料庫
package com.devzigma.repository;
import com.devzigma.model.Customer;
import org.springframework.data.mongodb.repository.MongoRepository;
public interface CustomerRepository extends MongoRepository<Customer, String> {
}
訂單庫
package com.devzigma.repository;
import com.devzigma.model.Order;
import org.springframework.data.mongodb.repository.MongoRepository;
public interface OrderRepository extends MongoRepository<Order, String> {
}
在服務包中，我有 CustomerService 和 OrderService 接口以及它們各自的實現。
CustomerService及其實現
package com.devzigma.services;
import com.devzigma.model.Customer;
import java.util.List;
import java.util.Optional;
public interface CustomerService {
Optional<Customer> getCustomerDetail(String id);
List<Customer> allCustomers();
}
package com.devzigma.services;
import com.devzigma.model.Customer;
import com.devzigma.repository.CustomerRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.*;
@Service
public class CustomerServiceImpl implements CustomerService {
@Autowired
private CustomerRepository customerRepository;
@Override
public Optional<Customer> getCustomerDetail(String id) {
return customerRepository.findById(id);
}
@Override
public List<Customer> allCustomers() {
return customerRepository.findAll();
}
}
然后是 OrderService 及其實現
package com.devzigma.services;
import com.devzigma.model.Order;
import java.util.Optional;
public interface OrderService {
Optional<Order> getAllOrdersForCustomer(String customerId);
}
package com.devzigma.services;
import com.devzigma.model.Order;
import com.devzigma.repository.CustomerRepository;
import com.devzigma.repository.OrderRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.*;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private CustomerRepository customerRepository;
@Autowired
private OrderRepository orderRepository;
@Override
public Optional<Order> getAllOrdersForCustomer(String customerId) {
return orderRepository.findById(customerId);
}
}
在我的主類中，我實現了 CommandLineRunner，以便我可以使用示例數據填充 MongoDB 數據庫。
下面是主類。
package com.devzigma;
import com.devzigma.model.Customer;
import com.devzigma.model.Order;
import com.devzigma.repository.CustomerRepository;
import com.devzigma.repository.OrderRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.util.HashMap;
@SpringBootApplication
public class DemoApplication implements CommandLineRunner {
@Autowired
private CustomerRepository customerRepository;
@Autowired
private OrderRepository orderRepository;
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
@Override
public void run(String... args) throws Exception {
customerRepository.deleteAll();
orderRepository.deleteAll();
final Customer customer1 = new Customer("10A", "Jane", "ABC Company");
final Customer customer2 = new Customer("20B", "Bob", "XYZ Company");
final Customer customer3 = new Customer("30C", "Tim", "CKV Company");
HashMap<String, Order> cus1order = new HashMap<>();
cus1order.put("001A", new Order("001A", 150.00, 25));
cus1order.put("002A", new Order("002A", 250.00, 15));
customer1.setOrders(cus1order);
customerRepository.save(customer1);
customerRepository.save(customer2);
customerRepository.save(customer3);
}
}
最后，下面是我的 application.properties 文件
server.port=8086
spring.data.mongodb.authentication-database=admin
spring.data.mongodb.uri=mongodb://localhost:27017/customer-order
我知道這是很多樣板代碼。 但請耐心等待。 如果有人能告訴我如何解決作為堆棧跟蹤給出的上述錯誤，那么將不勝感激。
再會！
解決方案2
0 2021-12-15 20:26:30
解決此異常的一種可能方法是通過 setter 使屬性可變（假設保留空鏈接集合是可以接受的）：
@AccessType(AccessType.Type.PROPERTY)
public void setLinks(List<Link> links) {
super.removeLinks();
super.add(links);
}
您甚至可以將其放在自定義父類中，並讓該類擴展 RepresentationModel，例如：
public abstract class MyRepresentationModel extends RepresentationModel<MyRepresentationModel> { ...
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