LibrarySystem图书管理系统(四)

第一步：修改dao和mapper

UserMapper.java

public interface UserMapper {
    int deleteByPrimaryKey(Long id);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Long id);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);

    User selectUser(@Param("userName") String userName);

    User updatePwd(@Param("userPwd") String newPwd,
                   @Param("userName") String userName);
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ray.dao.UserMapper">
  <resultMap id="BaseResultMap" type="com.ray.entity.User">
    <id column="id" jdbcType="BIGINT" property="id" />
    <result column="user_name" jdbcType="VARCHAR" property="userName" />
    <result column="user_email" jdbcType="VARCHAR" property="userEmail" />
    <result column="user_pwd" jdbcType="VARCHAR" property="userPwd" />
  </resultMap>
  <sql id="Base_Column_List">
    id, user_name, user_email, user_pwd
  </sql>
  <select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from user
    where id = #{id,jdbcType=BIGINT}
  </select>
  <!-- 查询用户 -->
  <select id="selectUser" parameterType="com.ray.entity.User" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List" />
    from user where user_name = #{userName}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Long">
    delete from user
    where id = #{id,jdbcType=BIGINT}
  </delete>
  <!-- 新增用户 -->
  <insert id="insert" parameterType="com.ray.entity.User">
    insert into user (id, user_name, user_email, 
      user_pwd)
    values (#{id,jdbcType=BIGINT}, #{userName,jdbcType=VARCHAR}, #{userEmail,jdbcType=VARCHAR}, 
      #{userPwd,jdbcType=VARCHAR})
  </insert>
  <insert id="insertSelective" parameterType="com.ray.entity.User">
    insert into user
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="id != null">
        id,
      </if>
      <if test="userName != null">
        user_name,
      </if>
      <if test="userEmail != null">
        user_email,
      </if>
      <if test="userPwd != null">
        user_pwd,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="id != null">
        #{id,jdbcType=BIGINT},
      </if>
      <if test="userName != null">
        #{userName,jdbcType=VARCHAR},
      </if>
      <if test="userEmail != null">
        #{userEmail,jdbcType=VARCHAR},
      </if>
      <if test="userPwd != null">
        #{userPwd,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.ray.entity.User">
    update user
    <set>
      <if test="userName != null">
        user_name = #{userName,jdbcType=VARCHAR},
      </if>
      <if test="userEmail != null">
        user_email = #{userEmail,jdbcType=VARCHAR},
      </if>
      <if test="userPwd != null">
        user_pwd = #{userPwd,jdbcType=VARCHAR},
      </if>
    </set>
    where id = #{id,jdbcType=BIGINT}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.ray.entity.User">
    update user
    set user_name = #{userName,jdbcType=VARCHAR},
      user_email = #{userEmail,jdbcType=VARCHAR},
      user_pwd = #{userPwd,jdbcType=VARCHAR}
    where id = #{id,jdbcType=BIGINT}
  </update>
  <!-- 修改密码 -->
  <update id="updatePwd" parameterType="com.ray.entity.User">
    update user
    set user_pwd = #{userPwd}
    where user_name = #{userName}
  </update>
</mapper>

第二步：创建service

├── service
│   ├── UserService.java
│   └── impl
│       └── UserServiceImpl.java

UserService.java

/**
 * @author Ray
 * @date 2018/5/23 0023
 */
public interface UserService {

    void save(User user);
    User checkLogin(String userName, String userPwd);
    boolean checkRegister(String userName, String userPwd, String email);
    boolean updatePwd(String newPwd, String username);
}

UserServiceImpl.java

package com.ray.service.impl;

import com.ray.dao.UserMapper;
import com.ray.entity.User;
import com.ray.service.UserService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;

/**
 * @author Ray
 * @date 2018/5/23 0023
 */
@Service
@Transactional(rollbackFor = Exception.class)
public class UserServiceImpl implements UserService {

    @Resource
    private UserMapper userMapper;

    /**
     * 新增用户
     * @param user
     */
    @Override
    public void save(User user) {
        userMapper.insert(user);
    }

    /**
     * 登录检查
     * @param userName
     * @param userPwd
     * @return
     */
    @Override
    public User checkLogin(String userName, String userPwd) {
        User user = userMapper.selectUser(userName);
        if(user != null && user.getUserPwd().equals(userPwd)){
            return user;
        }
        return null;
    }

    /**
     * 注册检查
     * @param userName
     * @param userPwd
     * @param email
     * @return
     */
    @Override
    public boolean checkRegister(String userName, String userPwd, String email) {
        User user = userMapper.selectUser(userName);
        if(user != null){
            return false;
        }else{
            User insertUser = new User();
            insertUser.setUserName(userName);
            insertUser.setUserPwd(userPwd);
            insertUser.setUserEmail(email);
            save(insertUser);
            return true;
        }
    }

    /**
     * 更改密码
     * @param newPwd
     * @param username
     * @return
     */
    @Override
    public boolean updatePwd(String newPwd, String username) {
        User user = userMapper.updatePwd(newPwd, username);
        if(user != null){
            return true;
        }
        return false;
    }
}

第三步：创建controller

└── controller
    └── UserController.java

UserController.java

package com.ray.controller;

import com.ray.service.UserService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * @author Ray
 * @date 2018/5/23 0023
 */
@Controller
public class UserController {

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    @Resource
    private UserService userService;

    /**
     * 用户注册
     * @RequestMapping 请求路径
     * @ResponseBody 返回JSON数据
     */
    @RequestMapping("insertUser")
    @ResponseBody
    public boolean insertUser(HttpServletRequest request, HttpServletResponse response){
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String email = request.getParameter("email");

        boolean result = userService.checkRegister(username,password,email);
        if(result){
            return true;
        }
        return false;
    }
}