1.3 springboot后端项目搭建-优快云博客

本文链接：https://blog.youkuaiyun.com/LetsStudy/article/details/124039660

本文展示了如何在Spring Boot应用中创建一个登录控制器`LoginController`，处理前端POST请求。`User`类定义了用户ID、用户名和密码属性。登录接口通过`@RequestBody`接收用户信息，对输入的用户名进行XSS防护，然后验证账号密码。如果验证失败，返回错误信息，成功则返回成功状态。

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1、新建项目

2、com/example/demo/pojo/User

package com.example.demo.pojo;

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;
    }
}

3、com/example/demo/controller/LoginController

package com.example.demo.controller;
import com.example.demo.result.Result;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.util.HtmlUtils;

import com.example.demo.pojo.User;

import java.util.Objects;

@Controller
public class LoginController {

//    @CrossOrigin  前端配置了跨域，后端不使用跨域注解也可以访问的
    @PostMapping(value = "api/login")
    @ResponseBody
    public Result login(@RequestBody User requestUser) {
        System.out.println(requestUser.getUsername());
        System.out.println(requestUser.getPassword());

        String username = requestUser.getUsername();
        // 对 html 标签进行转义，防止 XSS 攻击
        username = HtmlUtils.htmlEscape(username);
        if (!Objects.equals("admin", username) || !Objects.equals("123456", requestUser.getPassword())) {
            String message = "账号密码错误";
            return new Result(400);
        } else {
            return new Result(200);
        }
    }
}

4、com/example/demo/result/Result

package com.example.demo.result;

public class Result {
    private int code;
    public Result(int code){
        this.code = code;
    }
    public int getCode() {
        return code;
    }
    public void setCode(int code) {
        this.code = code;
    }
}

5、main/resources/application.properties