JAVA代码登录注册功能代码简单易懂复制即用

r囧r小猫 2024-03-31 12:35 65阅读 0赞

### 登录 ###

#### 创建一个公共类名字为Result ####

package com.buba.po;
    
    import lombok.Data;
    
    @Data
    public class Result<T>{
        private String msg;
        private String code;
        private T data;
    
        public Result(String msg, String code, T t) {
            this.msg = msg;
            this.code = code;
            this.data = t;
        }
    
        public static <T> Result success(T t) {
            return new Result<T>("success", "200",t);
        }
        public static <T> Result error(T t) {
            return new Result<T>("error", "400",t);
        }
    
        public Result(T t) {
            this.msg = "success";
            this.code = "200";
            this.data = t;
        }
    }

### Controller ###

@GetMapping("Login")
        public Result login(@Param("Name") String Name, @Param("Password") String Password) {
            Integer res = userService.login(Name, Password);
            if (res != null && res > 0) {
                User user = new User();
                return Result.success(user);
    //            return new Result<User>("登录成功","200",user);
            }
            return Result.error("用户名密码不正确，请重新输入");
        }

### Service ###

@Override
        public Integer login(String name, String password) {
            return userMapper.login(name, password);
        }

### Mapper ###

Integer login(@Param("name") String name, @Param("password")String password);

### Mapper.xml ###

<select id="login" parameterType="com.buba.po.User" resultType="int">
            select * from user where name = #{name} and password = #{password}
        </select>

### 注册 ###

### Controller ###

/**
         * register 注册
         * @param user
         * @return
         */
    
        @PostMapping("register")
        public String register(@RequestBody User user) {
            userService.register(user);
            return "注册成功";
        }

### Service ###

@Override
        public void register(User user) {
            userMapper.register(user);
        }

### Mapper ###

void register(User user);

### Mapper.xml ###

<insert id="register" parameterType="com.buba.po.User">
            insert into user(name,password,email,phone)
            values
            <trim prefix="(" suffix=")" suffixOverrides=",">
                <if test="name!=null and name!=''">
                    #{name},
                </if>
                <if test="password!=null and password!=''">
                    #{password},
                </if>
                <if test="email!=null and email!=''">
                    #{email},
                </if>
                <if test="phone!=null and phone!=''">
                    #{phone}
                </if>
            </trim>
        </insert>