后台登录失败

idea中成功调用了MUserController中的check_login,但是无法跳转

测试用户名错误

测试密码错误

均正确

MUserController

@Controller
@RequestMapping("/management/user")
public class MUserController {
@Resource
    UserService userService;

    @PostMapping("/check_login")
public Map checkLogin(String username, String password, HttpSession session) {
        Map result = new HashMap();
        try {
            User user = userService.checkLogin(username, password);
            session.setAttribute("loginUser", user);
            result.put("code", "0");
            result.put("message", "success");
            result.put("redirect_url","/management/index.html");
        } catch (BussinessException ex) {
            ex.printStackTrace();
            result.put("code", ex.getCode());
            result.put("message", ex.getMsg());
        }
return result;
    }
}

login.ftl

<script>
    // 表单提交事件
    layui.form.on("submit(login)" , function(formdata){//data参数包含了当前表单的数据
        console.log(formdata);
        //发送ajax请求进行登录校验
        layui.$.ajax({
url : "/management/user/check_login",
            data : formdata.field, //提交表单数据
            type : "post",
            dataType : "json" ,
            success : function(json){
console.log(json);
                if(json.code == "0"){ //登录校验成功
                    // layui.layer.msg("登录成功");
                    //跳转url
                    window.location.href=json.redirect_url;
                }else{
layui.layer.msg(json.message);
                }
            }
        })
return false;//submit提交事件返回true则表单提交,false则阻止表单提交
    })

userServiceImpl

@Service("userService")
public class UserServiceImpl implements UserService {
@Resource
    private UserMapper userMapper;

    public User checkLogin(String username, String password) {
        QueryWrapper<User> queryWrapper = new QueryWrapper<User>();
        queryWrapper.eq("username", username);
        User user = userMapper.selectOne(queryWrapper);
        if (user == null) {
throw new BussinessException("U02", "用户不存在");
        }
        String md5 = MD5Utils.md5Digest(password, user.getSalt());
        if (!md5.equals(user.getPassword())) {
throw new BussinessException("U03", "输入密码有误");
        }
return user;
    }
}

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