Spring MVC 遇到 415报错 无法解决

Question

在我学习SpingMVC的过程中我遇到了一些问题

HTTP Status 415 – Unsupported Media Type
Type Status Report

Message Content-Type 'application/json;charset=UTF-8' is not supported.

Description The origin server is refusing to service the request because the payload is in a format not supported by this method on the target resource.

我尝试使用Apifox访问地址http://localhost:8080/user/userSettingJSON时候出现了上面的警告，我不知道是什么原因

我的Java代码

package com.wujingkai.user_controller;

import lombok.Data;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.*;

//@RestController
@Controller
@RequestMapping("/user")
public class UserController {
    /**
     * 支持多个路径可以在value中使用 {"path1", "path2"}
     * 支持模糊匹配 * | **
     * /user/* 意味着 可以是任意的字符 /user/a /user/b  "/user/a/b是不可以的"
     * /user/** 意味着  /user/a /user/b /user/a/b/c/d
     * 可以直接提取共用的 路径到 类上， 最后的结果路径为 类地址 + 方法地址
     * <p>
     * 如果RequestMapping不写value默认是类上的地址
     * 如果请求方式不写任何请求地址都可以
     */
    @RequestMapping
    @ResponseBody
    public String index() {
        System.out.println("Hello World");
        return "You Can Login into our website." + "<br/>" +
                "Please <a href='/user/login'>Click This Link To Login</a>";
    }

    @RequestMapping(value = "/login")
    @ResponseBody
    public String login(@RequestParam String userName, @RequestParam String password, @RequestParam(defaultValue = "1", required = false) int isAgree) {
        // account 可传递
        // page 可以不传递
        if(this.userNames.contains(userName) && password.equals("123") && isAgree == 1)
            return "Login Successfully <a href='https://www.baidu.com'>Click this link to redirect your dashboard.</a>";
        else
            return "Login Failed";
    }

    @RequestMapping(value = "register", method = RequestMethod.GET)
    @ResponseBody
    public String register(@RequestParam List<String> userNames) {
        this.userNames.addAll(userNames);
        return userNames.toString();
    }

    /**
     *  用户设置 传递一个用户的实体类使用param的方式去接收
     * @param user 用户实体类
     * @return 是否设置成功
     */
//    @RequestMapping(value = "userSetting", method = RequestMethod.GET)
//    public String userSetting(User user) {
//        System.out.println("user = " + user);
//        return "Setting is successfully!";
//    }

    /**
     * 使用JSON的方式接受，但是Java不支持Json方式接口只能使用插件完成
     * 1. 在handlerAdapter 方法中配置json解析器
     * 2. 下载json处理的包
     *             {
     *                 name: x,
     *                 age: x,
     *                 salary: x
     *             }
     */
    @Data
    private class Person {
        private String name;
        private int age;
        private String gender;
    }

    @RequestMapping(value = "userSettingJSON")
    @PostMapping
    @ResponseBody
    public String userSettingJSON(@RequestBody Person person) {
        System.out.println(person);
        return "Setting is successfully!";
    }
}

Java配置类

package com.wujingkai.config;

import org.springframework.context.annotation.Bean;
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.mvc.method.annotation.RequestMappingHandlerAdapter;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

@EnableWebMvc  // 配置JSON 解析器
@Configuration
@ComponentScan("com.wujingkai.user_controller")
public class Config {
    @Bean
    public RequestMappingHandlerMapping requestMappingHandlerMapping() {
        return new RequestMappingHandlerMapping();
    }

    @Bean
    public RequestMappingHandlerAdapter requestMappingHandlerAdapter() {
        return new RequestMappingHandlerAdapter();
    }
}

Maven子工程

<?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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.example</groupId>
        <artifactId>SpringMVC</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <artifactId>spring-mvc-base-02</artifactId>
    <packaging>war</packaging>
    <name>Archetype - spring-mvc-base-02</name>
    <url>http://maven.apache.org</url>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.30</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.15.0</version>
        </dependency>
    </dependencies>
</project>

依赖已经确认没有问题

Answer 1

这个地方为什么加了两个Mapping？还有你是不是用get请求这个链接报的？