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[英]Bazel build with Jackson annotations for ser/Deser and generate Java classes
[英]Spring 5 MVC JSON ser/deser not respecting properties (but works for XML)
我在使用香草Spring Boot 2 / Spring 5 / Java 10 / Jigsaw的新設置中遇到一種奇怪的情況,無論我做什么,通過Spring MVC拉一個對象都會給我一個空的{} JSON對象,而不是我的對象屬性。
但是...如果我使用application / xml的Accept標頭而不是application / json,我將獲得所有正確的屬性。 也許我已經失去了理智,但我似乎在以前的版本中回想起,如果它在一側(xml)上有效,則應該在另一側(json)上有效,反之亦然。
我已經在內部追溯到為我的模型類創建的BeanSerializer,沒有屬性。 我只是不確定為什么會這樣。 我在執行過程中進行了跟蹤,以查看Jackson在HTTP轉換過程中是否在運行……它只是忽略了對象內部的所有屬性。
這是我的設置:
Maven的:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>10</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.4</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.0</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>javax.activation-api</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-jaxb-annotations</artifactId>
<version>2.9.6</version>
<scope>runtime</scope>
</dependency>
模塊信息:
module stupid.example {
opens com.example.microservice.datasynchronizer;
opens com.example.microservice.datasynchronizer.model;
opens com.example.microservice.datasynchronizer.webflux to spring.beans, spring.core, spring.web ;
opens com.example.microservice.datasynchronizer.dao to spring.core ;
requires java.base ;
requires java.xml.bind ;
requires spring.boot;
requires spring.boot.autoconfigure;
requires spring.beans ;
requires spring.context ;
requires spring.core ;
requires spring.data.commons ;
requires spring.web ;
requires spring.webmvc ;
requires java.persistence ;
requires org.junit.jupiter.api;
requires spring.test;
requires spring.boot.test ;
}
模型類(最新的類,以防萬一,帶有jaxb注釋):
@Entity
@XmlRootElement
public class Thingamajig {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@XmlElement
private Long id;
@XmlElement
private String firstName;
@XmlElement
private String lastName;
public Thingamajig ( ) { ; }
public Thingamajig(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
@Override
public String toString() {
return String.format("Thingamajig [id=%d, firstName='%s', lastName='%s']", id, firstName, lastName);
}
}
控制器:
@RestController
public class ThingamajigController {
@Autowired
private ThingamajigDao _dao ;
@GetMapping("/thing/{id}")
public Thingamajig getPerson(@PathVariable Long id) {
Optional<Thingamajig> found = _dao.findById(id) ;
return found.get() ;
}
@PostMapping ( "/thing" )
@ResponseStatus(HttpStatus.CREATED)
public void add(@RequestBody Thingamajig person) {
_dao.save(person) ;
}
}
組態:
@EnableWebMvc
@SpringBootApplication
public class DataSynchronizerApplication {
public static void main(String[] args) throws Throwable {
SpringApplication.run(DataSynchronizerApplication.class, args);
}
}
我到底想念什么? 任何幫助表示贊賞。
您只是忘了在Thingamajig類中定義getter和setter。
XML之所以有效,是因為您已經在屬性上定義了注釋,但是JSON序列化程序正在尋找吸氣劑。
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