Controller的HTTP Status 400错误问题

最新推荐文章于 2023-08-24 23:19:18 发布

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最新推荐文章于 2023-08-24 23:19:18 发布

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分类专栏： JAVA开发报错篇文章标签： json java

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SpringMVC使用JSON做请求数据和@RequestBody直接存入Java实体类对象出现400问题

错误代码如下：
<!doctype html>

HTTP Status 400 – Bad Request

Type Status Report

Description The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

出现此问题可能原因

请求的JSON数据格式出现错误，正确JSON的格式如下：
{
“id”:“id”,
“username”: “usernameValue”,
“password”: “passwordValue”
}
要跟其接收的实体类保持一致（相关实体类和Controller如下）

//User实体类
public class User {
    int id;
    String username;
    String password;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}
//接收前端JSON的Controller
	@ResponseBody
    @RequestMapping(value = "test",method = RequestMethod.POST)
    public User test(@RequestBody User user) {
        System.out.println(user);
        return user;
    }