Question

我有一个非常简单的Spring应用程序（不是弹簧启动）。我已经实现了GET和POST控制器方法。 GET方法工作正常。但POST正在投掷415 Unsupported MediaType。重现的步骤可在下面找到

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("/");

    }


}

代码可在此处获取：

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

这会旋转嵌入式tomcat。

现在你可以卷曲以下

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

工作正常

但是

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

投掷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>

Answer 1

接受标题可能是个问题。据我记忆，当你通过curl发送请求时，它会添加一个默认标题accept : */*
但是在JSON的情况下，您必须提及接受标题
为accept : application/json，类似地，您已经提到了内容类型。

还有一点，我不知道那是什么，但你不认为你必须像那样放置“请求映射”

@RequestMapping(value="/sample" ...
@RequestMapping(value="/sample2" ...

这可能不是这种情况，但接受标题就是问题，我认为是主要问题。
解决方案2
既然你有这个代码

public String getResponse2(@RequestBody Person person)

我之前已经遇到过这个问题，解决方案二可能会有所帮助

FormHttpMessageConverter，当内容类型为application / x-www-form-urlencoded时，用于@RequestBody-annotated参数，不能像@ModelAttribute那样绑定目标类）。因此，您需要@ModelAttribute而不是@RequestBody

使用@ModelAttribute注释而不是像这样的@RequestBody

public String getResponse2(@ModelAttribute Person person)

我向某人提供了相同的答案并且有所帮助。这是我的answer

Answer 2

我找到了解决方案，我想发布在这里，以便其他人受益。

首先，我需要在我的类路径中包含jackson，我在build.gradle中添加如下：

 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扩展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);
    }
}

这就是全部，一切都很顺利

Answer 3

你可以尝试在curl

中使用-d选项吗？

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

此外，如果你使用Windows，你应该转义双引号

-d "{ \"id\": 1, \"name\":\"sai\" }"

415 spring应用程序中的POST请求不支持的MediaType

3 个答案: