[英]Spring-Boot content-negotation does not work
I hope someone can help me. 我希望有一个人可以帮助我。
My problem: I want to create a web backend with spring-boot, which supports REST. 我的问题:我想使用spring-boot创建一个支持REST的Web后端。 For POST-Request, it must accept JSON and XML. 对于POST请求,它必须接受JSON和XML。
I have implemented a messageConverter with Jackson. 我已经与Jackson一起实现了messageConverter。 package backend.config; 软件包backend.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.http.converter.xml.MarshallingHttpMessageConverter;
import org.springframework.oxm.xstream.XStreamMarshaller;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import java.util.List;
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
/* i have commented this out, bc it does not work for me
@Override
public void configureContentNegotiation(
ContentNegotiationConfigurer configurer) {
// Simple strategy: only path extension is taken into account
configurer.
defaultContentType(MediaType.APPLICATION_XML).
mediaType("html", MediaType.TEXT_HTML).
mediaType("xml", MediaType.APPLICATION_XML).
mediaType("json", MediaType.APPLICATION_JSON);
}
*/
@Override
public void configureMessageConverters(
List<HttpMessageConverter<?>> messageConverters) {
messageConverters.add(createXmlHttpMessageConverter());
messageConverters.add(new MappingJackson2HttpMessageConverter());
super.configureMessageConverters(messageConverters);
}
private HttpMessageConverter<Object> createXmlHttpMessageConverter() {
MarshallingHttpMessageConverter xmlConverter =
new MarshallingHttpMessageConverter();
XStreamMarshaller xstreamMarshaller = new XStreamMarshaller();
xmlConverter.setMarshaller(xstreamMarshaller);
xmlConverter.setUnmarshaller(xstreamMarshaller);
return xmlConverter;
}
This is my Controller: 这是我的控制器:
package backend.controller;
import backend.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import backend.service.UserService;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import java.awt.*;
import java.util.List;
@RestController
@EnableWebMvc
public class UserController {
@Autowired
private UserService userService;
@GetMapping(value="/users")
public List<User> getUser(){
return userService.getAll();
}
@PostMapping(value="/users", consumes = MediaType.APPLICATION_XML_VALUE)
public void addUser(@RequestBody User user){
userService.addUser(user);
}
If i make a getRequest, everything works fine. 如果我发出getRequest,一切正常。 But if i tried a post request, i got this Exception: 但是,如果我尝试发布请求,则会收到此异常:
<linked-hash-map>
<entry>
<string>timestamp</string>
<date>2017-11-03 14:00:14.4 UTC</date>
</entry>
<entry>
<string>status</string>
<int>400</int>
</entry>
<entry>
<string>error</string>
<string>Bad Request</string>
</entry>
<entry>
<string>exception</string>
<string>org.springframework.beans.TypeMismatchException</string>
</entry>
<entry>
<string>message</string>
<string>Failed to convert value of type 'backend.entity.User' to required type 'backend.entity.User'</string>
</entry>
<entry>
<string>path</string>
<string>/users</string>
</entry>
</linked-hash-map>
My post request looks like: 我的帖子请求看起来像:
<backend.entity.User>
<username>testUserName</username>
<firstName>testFirstName</firstName>
<lastName>testLastName</lastName>
</backend.entity.User>
And my entity class has these form: 我的实体类具有以下形式:
package backend.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import org.springframework.data.annotation.Id;
@Data
@AllArgsConstructor
public class User {
@Id
private String username;
private String firstName;
private String lastName;
}
My dependencies: 我的依赖:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>de.flapdoodle.embed</groupId>
<artifactId>de.flapdoodle.embed.mongo</artifactId>
</dependency>
<dependency>
<groupId>cz.jirutka.spring</groupId>
<artifactId>embedmongo-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.7.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.7.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.9</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>3.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
Does someone know the reason of my problem? 有人知道我的问题的原因吗?
Thank you guys 感谢大伙们
My Pom is 我的Pom是
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>stackoverflow</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>stackoverflow</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M3</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>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>javax.transaction-api</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
See I have not put any dependency related to Jackson except jackson-dataformat-xml 看到除了jackson-dataformat-xml,我没有放置任何与Jackson相关的依赖项
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.