1.MyBatis基础环境的搭建
1.1 核心配置文件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> <typeAliases> <typeAlias alias="User" type="com.mipo.entity.User"/> </typeAliases> <environments default="development"> <environment id="development"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/test?characterEncoding=utf-8"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments> <mappers> <mapper resource="com/mipo/mapping/UserMapper.xml"/> </mappers> </configuration>
1.2 配置映射文件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.mipo.mapping.UserMapper"> <select id="selectUser" parameterType="Integer" resultType="User"> SELECT * FROM T_USER WHERE ID = #{ID} </select> </mapper>
1.3 编写junit单元测试
@Test public void myBatisTest(){ try { String resource = "mybatis-config.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); SqlSessionFactory sqlSessionFactory = new qlSessionFactoryBuilder().build(inputStream); SqlSession sqlSession = sqlSessionFactory.openSession(); User user = (User)sqlSession.selectOne("com.mipo.mapping.UserMapper.selectUser", Integer.valueOf(1)); System.out.println(user); } catch (IOException e) { e.printStackTrace(); } }