415 Spring应用程序中不支持POST请求的MediaType

Z时代
2024-01-10
分类：问答

我有一个非常简单的Spring应用程序（没有Spring Boot）。我已经实现了GET和POST控制器方法。该GET方法效果很好。但是，POST正在抛出415 Unsupported MediaType。复制步骤如下

ServiceController. java

package com.example.myApp.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
    @Controller
    @RequestMapping("/service/example")
    public class ServiceController {
        @RequestMapping(value="sample", method = RequestMethod.GET)
        @ResponseBody
    public String getResp() {
        return "DONE";
    }
    @RequestMapping(value="sample2", method = RequestMethod.POST, consumes = "application/json")
    @ResponseBody
    public String getResponse2(@RequestBody Person person) {
        return "id is " + person.getId();
    }
}
class Person {
    private int id;
    private String name;
    public Person(){
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

AppConfig.java

package com.example.myApp.app.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
@EnableWebMvc
@ComponentScan("com.example.myApp")
public class AppConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/test/**").addResourceLocations("/test/").setCachePeriod(0);
        registry.addResourceHandler("/css/**").addResourceLocations("/css/").setCachePeriod(0);
        registry.addResourceHandler("/img/**").addResourceLocations("/img/").setCachePeriod(0);
        registry.addResourceHandler("/js/**").addResourceLocations("/js/").setCachePeriod(0);
    }
}

AppInitializer.java

package com.example.myApp.app.config;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
public class AppInitializer implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        // Create the 'root' Spring application context
        AnnotationConfigWebApplicationContext rootContext =
                new AnnotationConfigWebApplicationContext();
        rootContext.register(AppConfig.class);
        servletContext.addListener(new ContextLoaderListener(rootContext));
        // Register and map the dispatcher servlet
        ServletRegistration.Dynamic dispatcher =
                servletContext.addServlet("dispatcher", new DispatcherServlet(rootContext));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
    }
}

该代码在这里可用：

git clone https://bitbucket.org/SpringDevSeattle/springrestcontroller.git ./gradlew clean build tomatrunwar

这将旋转嵌入式tomcat。

现在你可以卷曲以下内容

curl -X GET -H "Content-Type: application/json" "http://localhost:8095/myApp/service/example/sample"

工作良好

但

curl -X POST -H "Content-Type: application/json" '{ "id":1, "name":"sai" }' "http://localhost:8095/myApp/service/example/sample2"

引发415不支持的MediaType

<body>
        <h1>HTTP Status 415 - </h1>
        <HR size="1" noshade="noshade">
        <p>
            <b>type</b> Status report
        </p>
        <p>
            <b>message</b>
            <u></u>
        </p>
        <p>
            <b>description</b>
            <u>The server refused this request because the request entity is in a format not supported by the requested resource for the requested method.</u>
        </p>
        <HR size="1" noshade="noshade">
        <h3>Apache Tomcat/7.0.54</h3>
    </body>

回答：

我找到了解决方案，因此我想在这里发布，以使他人受益。

首先，我需要在我的类路径中包含杰克逊，我在build.gradle中添加了以下内容：

compile 'com.fasterxml.jackson.core:jackson-databind:2.7.5' compile 'com.fasterxml.jackson.core:jackson-annotations:2.7.5' compile 'com.fasterxml.jackson.core:jackson-core:2.7.5'

接下来，我必须更改AppConfig其扩展范围WebMvcConfigurerAdapter，如下所示：

@Configuration
@EnableWebMvc
@ComponentScan("com.example.myApp")
public class AppConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/test/**").addResourceLocations("/test/").setCachePeriod(0);
        registry.addResourceHandler("/css/**").addResourceLocations("/css/").setCachePeriod(0);
        registry.addResourceHandler("/img/**").addResourceLocations("/img/").setCachePeriod(0);
        registry.addResourceHandler("/js/**").addResourceLocations("/js/").setCachePeriod(0);
    }
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(new MappingJackson2HttpMessageConverter());
        super.configureMessageConverters(converters);
    }
}