Ctrl+T：進入實現類

<?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.mmall.dao.UserMapper" >
  <resultMap id="BaseResultMap" type="com.mmall.pojo.User" >
    <constructor 
 
>
      <idArg column="id" jdbcType="INTEGER" javaType="java.lang.Integer" />
      <arg column="username" jdbcType="VARCHAR" javaType="java.lang.String" />
      <arg column="password" jdbcType="VARCHAR" javaType="java.lang.String" />
      <arg column="email" jdbcType="VARCHAR"
 
 javaType="java.lang.String" />
      <arg column="phone" jdbcType="VARCHAR" javaType="java.lang.String" />
      <arg column="question" jdbcType="VARCHAR" javaType="java.lang.String" />
      <arg column="answer" jdbcType="VARCHAR" javaType="java.lang.String" />
      <arg column
 
="role" jdbcType="INTEGER" javaType="java.lang.Integer" />
      <arg column="create_time" jdbcType="TIMESTAMP" javaType="java.util.Date" />
      <arg column="update_time" jdbcType="TIMESTAMP" javaType="java.util.Date" />
    </constructor>
  </resultMap>
  <sql id="Base_Column_List" >
    id, username, password, email, phone, question, answer, role, create_time, update_time
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from mmall_user
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from mmall_user
    where id = #{id,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.mmall.pojo.User" >
    insert into mmall_user (id, username, password, 
      email, phone, question, 
      answer, role, create_time, 
      update_time)
    values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
      #{email,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR}, #{question,jdbcType=VARCHAR}, 
      #{answer,jdbcType=VARCHAR}, #{role,jdbcType=INTEGER}, now(),
      now())
  </insert>
  <insert id="insertSelective" parameterType="com.mmall.pojo.User" >
    insert into mmall_user
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        id,
      </if>
      <if test="username != null" >
        username,
      </if>
      <if test="password != null" >
        password,
      </if>
      <if test="email != null" >
        email,
      </if>
      <if test="phone != null" >
        phone,
      </if>
      <if test="question != null" >
        question,
      </if>
      <if test="answer != null" >
        answer,
      </if>
      <if test="role != null" >
        role,
      </if>
      <if test="createTime != null" >
        create_time,
      </if>
      <if test="updateTime != null" >
        update_time,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        #{id,jdbcType=INTEGER},
      </if>
      <if test="username != null" >
        #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        #{password,jdbcType=VARCHAR},
      </if>
      <if test="email != null" >
        #{email,jdbcType=VARCHAR},
      </if>
      <if test="phone != null" >
        #{phone,jdbcType=VARCHAR},
      </if>
      <if test="question != null" >
        #{question,jdbcType=VARCHAR},
      </if>
      <if test="answer != null" >
        #{answer,jdbcType=VARCHAR},
      </if>
      <if test="role != null" >
        #{role,jdbcType=INTEGER},
      </if>
      <if test="createTime != null" >
        now(),
      </if>
      <if test="updateTime != null" >
        now(),
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.mmall.pojo.User" >
    update mmall_user
    <set >
      <if test="username != null" >
        username = #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        password = #{password,jdbcType=VARCHAR},
      </if>
      <if test="email != null" >
        email = #{email,jdbcType=VARCHAR},
      </if>
      <if test="phone != null" >
        phone = #{phone,jdbcType=VARCHAR},
      </if>
      <if test="question != null" >
        question = #{question,jdbcType=VARCHAR},
      </if>
      <if test="answer != null" >
        answer = #{answer,jdbcType=VARCHAR},
      </if>
      <if test="role != null" >
        role = #{role,jdbcType=INTEGER},
      </if>
      <if test="createTime != null" >
        create_time = #{createTime,jdbcType=TIMESTAMP},
      </if>
      <if test="updateTime != null" >
        update_time = now(),
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.mmall.pojo.User" >
    update mmall_user
    set username = #{username,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR},
      email = #{email,jdbcType=VARCHAR},
      phone = #{phone,jdbcType=VARCHAR},
      question = #{question,jdbcType=VARCHAR},
      answer = #{answer,jdbcType=VARCHAR},
      role = #{role,jdbcType=INTEGER},
      create_time = #{createTime,jdbcType=TIMESTAMP},
      update_time = now()
    where id = #{id,jdbcType=INTEGER}
  </update>
  <select id="checkUsername" resultType="int" parameterType="string">
  select count(1) from mmall_user
  where username=#{username}
  </select>
  <select id="selectLogin" resultMap="BaseResultMap" parameterType="map">
    SELECT
    --     *???//這樣真的好麽?答案就是,這樣不好.
    <include refid="Base_Column_List" />
    from mmall_user
    where username = #{username}
    and password = #{password}
  </select>
  <select id="checkEmail" resultType="int" parameterType="string" >
    select count(1) from mmall_user
    where email = #{email}
  </select>

</mapper>

package com.mmall.controller.portal;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpSession;

/**
 * Created by think on 2018/1/8.
 */
@Controller
@RequestMapping("/user/")
public class UserController {
    @Autowired
    private IUserService iUserService;

    /**
     * @param username
     * @param password
     * @param session
     * @return
     */
    @RequestMapping(value = "login.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<User> login(String username, String password, HttpSession session) {
        ServerResponse<User> response = iUserService.login(username, password);
        if (response.isSuccess()) {
            session.setAttribute(Const.CURRENT_USER, response.getData());
        }
        return response;
    }

    @RequestMapping(value = "logout.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> logout(HttpSession session) {
        session.removeAttribute(Const.CURRENT_USER);
        return ServerResponse.createBySuccess();
    }

    @RequestMapping(value = "register.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> register(User user) {
        return iUserService.register(user);
    }

    @RequestMapping(value = "check_valid.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> checkValid(String str, String type) {
        return iUserService.checkValid(str, type);
    }
}

package com.mmall.service;

import com.mmall.common.ServerResponse;
import com.mmall.pojo.User;

/**
 * Created by think on 2018/1/8.
 */
public interface IUserService {
    ServerResponse<User> login(String username, String password);
    ServerResponse<String> register(User user);
    ServerResponse<String> checkValid(String str,String type)
}

package com.mmall.service.impl;

        import com.mmall.common.Const;
        import com.mmall.common.ServerResponse;
        import com.mmall.dao.UserMapper;
        import com.mmall.pojo.User;
        import com.mmall.service.IUserService;
        import com.mmall.util.MD5Util;
        import org.springframework.beans.factory.annotation.Autowired;
        import org.springframework.stereotype.Service;

/**
 * Created by think on 2018/1/8.
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {
    @Autowired
    private UserMapper userMapper;
    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if(resultCount == 0 ){
            return ServerResponse.createByErrorMessage("用戶名不存在");
        }
        String md5Password = MD5Util.MD5EncodeUtf8(password);
        User user  = userMapper.selectLogin(username,md5Password);
        if(user == null){
            return ServerResponse.createByErrorMessage("密碼錯誤");
        }

        user.setPassword(org.apache.commons.lang3.StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登錄成功",user);
    }

    public ServerResponse<String> register(User user){
        ServerResponse validResponse = this.checkValid(user.getUsername(),Const.USERNAME);
        if(!validResponse.isSuccess()){
            return validResponse;
        }
        validResponse = this.checkValid(user.getEmail(),Const.EMAIL);
        if(!validResponse.isSuccess()){
            return validResponse;
        }
        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));
        int resultCount = userMapper.insert(user);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("註冊失敗");
        }
        return ServerResponse.createBySuccessMessage("註冊成功");
    }

    public ServerResponse<String> checkValid(String str,String type){
        if(org.apache.commons.lang3.StringUtils.isNotBlank(type)){
            //開始校驗
            if(Const.USERNAME.equals(type)){
                int resultCount = userMapper.checkUsername(str);
                if(resultCount > 0 ){
                    return ServerResponse.createByErrorMessage("用戶名已存在");
                }
            }
            if(Const.EMAIL.equals(type)){
                int resultCount = userMapper.checkEmail(str);
                if(resultCount > 0 ){
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }
        }else{
            return ServerResponse.createByErrorMessage("參數錯誤");
        }
        return ServerResponse.createBySuccessMessage("校驗成功");
    }
}

package com.mmall.util;

import org.springframework.util.StringUtils;

import java.security.MessageDigest;

/**
 * Created by geely
 */
public class MD5Util {

    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    /**
     * 返回大寫MD5
     *
     * @param origin
     * @param charsetname
     * @return
     */
    private static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString.toUpperCase();
    }

    public static String MD5EncodeUtf8(String origin) {
        return MD5Encode(origin, "utf-8");
    }


    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};

}

package com.mmall.common;

/**
 * Created by geely
 */
public class Const {

    public static final String CURRENT_USER = "currentUser";
    public static final String EMAIL = "email";
    public static final String USERNAME = "username";
    public interface Role{
        int ROLE_CUSTOMER = 0; //普通用戶
        int ROLE_ADMIN = 1;//管理員
    }
}

package com.mmall.dao;

import com.mmall.pojo.User;
import org.apache.ibatis.annotations.Param;

public interface UserMapper {
    int deleteByPrimaryKey(Integer id);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);

    int checkUsername(String username);

    User selectLogin(@Param("username") String username, @Param("password")String password);

    int checkEmail(String email);
}

登出，註冊，校驗功能開發