Mybatis 配置文件

1、核心配置文件 sqlMapConfig.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>
     <properties resource="jdbc.properties" />
     <!-- 别名 包以其子包下所有类 头字母大小都行 -->
     <typeAliases>
         <!-- <typeAlias type="cn.lijun.mybatis.pojo.User" alias="User"/> -->
         <package name="com.zlh.mybatis.pojo" />
     </typeAliases>
     <!-- 和spring整合后 environments配置将废除 -->
     <environments default="development">
         <environment id="development">
             <!-- 使用jdbc事务管理 -->
             <transactionManager type="JDBC" />
             <!-- 数据库连接池 -->
             <dataSource type="POOLED">
                 <property name="driver" value="${jdbc.driver}" />
                 <property name="url" value="${jdbc.url}" />
                 <property name="username" value="${jdbc.user}" />
                 <property name="password" value="${jdbc.password}" />
             </dataSource>
         </environment>
     </environments>
     <!-- 映射器 -->
     <mappers>
         <mapper resource="sqlmap/User.xml" />
         <mapper resource="com/zlh/mybatis/mapper/UserMapper.xml"/>
         <mapper resource="com/zlh/test/test.xml"/>
     </mappers>
 </configuration>

2、sql语句 User.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="user">
     <select id="findUserById" parameterType="Integer" resultType="com.zlh.mybatis.pojo.User" >
         SELECT * FROM user WHERE id = #{id}
     </select>
     <select id="findUserByUserName" parameterType="String" resultType="com.zlh.mybatis.pojo.User" >
         SELECT * FROM user WHERE username LIKE "%"#{username}"%"
     </select>
     <select id="findAllUser" parameterType="Integer" resultType="com.zlh.mybatis.pojo.User" >
         SELECT * FROM user
     </select>
     <insert id="insertUser" parameterType="com.zlh.mybatis.pojo.User">
         INSERT INTO user (username,birthday,sex,address) VALUES (#{username},#{birthday},#{sex},#{address})
     </insert>
     <update id="updateUser" parameterType="com.zlh.mybatis.pojo.User">
         UPDATE user SET username = #{username},sex=#{sex},birthday=#{birthday},address=#{address} WHERE id = #{id}
     </update>
     <delete id="deleteUserById" parameterType="Integer">
         DELETE FROM user WHERE id = #{id}
     </delete>
 </mapper>

3、日志文件 log4j.properties

 # Global logging configuration
 log4j.rootLogger=DEBUG, stdout
 # Console output...
 log4j.appender.stdout=org.apache.log4j.ConsoleAppender
 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
 log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

4、数据库文件 jdbc.properties

 jdbc.driver=com.mysql.jdbc.Driver
 jdbc.url=jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8
 jdbc.user=root
 jdbc.password=root

5、测试类

 package com.zlh.mybatis.junit;

 import java.io.IOException;
 import java.io.InputStream;

 import org.apache.ibatis.io.Resources;
 import org.apache.ibatis.session.SqlSession;
 import org.apache.ibatis.session.SqlSessionFactory;
 import org.apache.ibatis.session.SqlSessionFactoryBuilder;
 import org.junit.Test;

 import com.zlh.mybatis.pojo.User;

 public class MybatisFirstTest {

     @Test
     public void testMybatis() throws IOException {
         // 1加载核心配置文件
         String resource = "sqlMapConfig.xml";
         InputStream in = Resources.getResourceAsStream(resource);
         // 2创建sqlSessionFactory
         SqlSessionFactory s = new SqlSessionFactoryBuilder().build(in);
         // 3创建sqlSession
         SqlSession sqlSession = s.openSession();
         // 4执行sql语句
         User u = sqlSession.selectOne("user.findUserById", 10);
         System.out.println(u);
     }
 }