- mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!--导入属性配置-->
<properties resource="datasource.properties"></properties>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${db.driverClassName}"/>
<property name="url" value="${db.url}"/>
<property name="username" value="${db.username}"/>
<property name="password" value="${db.password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="mappers/UserMapper.xml"/>
</mappers>
</configuration>
2.pojo
<?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.love.lee.dao.UserMapper" >
<resultMap id="BaseResultMap" type="com.love.lee.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.love.lee.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.love.lee.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.love.lee.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.love.lee.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="checkEmail" resultType="int" parameterType="string" >
select count(1) from mmall_user
where email = #{email}
</select>
<select id="selectLogin" resultMap="BaseResultMap" parameterType="map">
SELECT
-- *???//这样真的好么?答案就是,这样不好.
<include refid="Base_Column_List" />
from mmall_user
where username = #{username}
and password = #{password}
</select>
<select id="selectQuestionByUsername" resultType="string" parameterType="string">
select
question
from mmall_user
where username = #{username}
</select>
<select id="checkAnswer" resultType="int" parameterType="map">
SELECT
count(1)
from mmall_user
where username=#{username}
and question = #{question}
and answer = #{answer}
</select>
<update id="updatePasswordByUsername" parameterType="map">
update mmall_user
SET password = #{passwordNew},update_time = now()
where username = #{username}
</update>
<select id="checkPassword" resultType="int" parameterType="map">
SELECT
count(1)
from mmall_user
where password = #{password}
and id = #{userId}
</select>
<select id="checkEmailByUserId" resultType="int" parameterType="map">
select count(1) from mmall_user
where email = #{email}
and id != #{userId}
</select>
</mapper>
- 接口
package com.love.lee.dao;
import com.love.lee.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);
int checkEmail(String email);
User selectLogin(@Param("username") String username, @Param("password") String password);
String selectQuestionByUsername(String username);
int checkAnswer(@Param("username") String username, @Param("question") String question, @Param("answer") String answer);
int updatePasswordByUsername(@Param("username") String username, @Param("passwordNew") String passwordNew);
int checkPassword(@Param(value = "password") String password, @Param("userId") Integer userId);
int checkEmailByUserId(@Param(value = "email") String email, @Param(value = "userId") Integer userId);
}
4.调用
Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
SqlSession sqlSession = sqlSessionFactory.openSession();
try {
sqlSession = dao.getSqlSession();
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
User user = userMapper.selectByPrimaryKey(1);
System.out.println(user.toString());
} catch (IOException e) {
e.printStackTrace();
} finally {
if (sqlSession != null) {
sqlSession.close();
}
}
