[英]Getting 404 error with Spring Boot + REST application
基本上我一直在使用 spring 在这个多模块应用程序中工作,但是当我尝试使用来自我的 Rest 控制器的服务时,我不断收到这个 404 错误。
{
"timestamp": "2021-11-03T18:54:23.230+00:00",
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/api/opus/auth/client"
}
这是我的应用程序属性:
server.port=8080
spring.jackson.serialization.FAIL_ON_EMPTY_BEANS=false
spring.jackson.serialization.fail-on-self-references=false
server.servlet.context-path=/api/opus
以下是其余控制器之一的示例:
package com.opus.restApi.implementations;
@RequestMapping("/auth/client")
@RestController
@CrossOrigin(origins = "*")
public class ClientRestController implements IClientRestController{
@Autowired
private IClientService service;
@GetMapping("")
public Iterable<Client> findAll() {
return service.findAll();
}
}
这是我的主要课程:
package com.opus.restApi;
@SpringBootApplication
@ComponentScan("com.opus.app")
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class, XADataSourceAutoConfiguration.class})
public class RestApiApplication {
public static void main(String[] args) {
SpringApplication.run(RestApiApplication.class, args);
}
}
我还可以分享我正在使用的主 pom:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.opus</groupId>
<artifactId>app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>OpusApp</name>
<description>Demo project for Spring Boot</description>
<packaging>pom</packaging>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mockito/mockito-all -->
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.10.19</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.testng/testng -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>7.4.0</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>2.5.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>2.5.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>2.5.6</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
</dependencies>
<modules>
<module>logic</module>
<module>model</module>
<module>persistence</module>
<module>restApi</module>
</modules>
</project>
在这里,我可以向您展示我用于 rest 模块的 pom:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.opus</groupId>
<artifactId>app</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>restApi</artifactId>
<version>${parent.version}</version>
<name>restApi</name>
<description>Demo project for Spring Boot</description>
<packaging>jar</packaging>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.opus</groupId>
<artifactId>logic</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.5.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-websocket -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
<version>2.5.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.webjars/webjars-locator-core -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>webjars-locator-core</artifactId>
<version>0.48</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.webjars/sockjs-client -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>sockjs-client</artifactId>
<version>1.5.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.webjars/stomp-websocket -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>stomp-websocket</artifactId>
<version>2.3.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.webjars/bootstrap -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>5.1.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.webjars.bower/jquery -->
<dependency>
<groupId>org.webjars.bower</groupId>
<artifactId>jquery</artifactId>
<version>3.6.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt -->
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.firebase/firebase-admin -->
<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>8.1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
从您的主要RestApiApplication
类中删除@ComponentScan
。 @SpringBootApplication
封装了@Configuration
、 @EnableAutoConfiguration
和@ComponentScan
注释及其默认属性。 为默认值@ComponentScan
包装上的所有子包手段@ComponentScan
用于扫描。 这就是为什么在项目的基本包中包含主类通常是一个好习惯的原因。
package com.opus.restApi;
@SpringBootApplication
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class, XADataSourceAutoConfiguration.class})
public class RestApiApplication {
public static void main(String[] args) {
SpringApplication.run(RestApiApplication.class, args);
}
}
这应该解决似乎与您的ClientRestController
类没有被扫描相关的问题,因此没有创建相应的 Spring-managed bean。
您需要使用这些方法之一来获取所有活动端点的列表。
这将使您能够查看应用程序公开的端点的完整列表。 然后,您要么在列表中看到目标端点,要么看不到。 如果您确实看到了它们,则意味着您之前使用了错误的 URI。
如果没有,则表示控制器 bean 尚未添加到应用程序上下文中……这可能是由于@ComponentScan
注释指向错误的包……
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