MyBatis官網地址：http://www.mybatis.org/mybatis-3/

環境搭建

導入MyBatis的坐標和其他相關坐標

<!--mybatis坐標--> <dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.5</version> </dependency> <!--mysql驅動坐標--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> <scope>runtime</scope> </dependency> <!--單元測試坐標--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!--日志坐標--> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.12</version> </dependency>

編寫UserMapper映射文件

<?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="userMapper"> <select id="findAll" resultType="com.itheima.domain.User"> select * from User </select> </mapper>

編寫MyBatis核心文件

<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN“ "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <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:///test"/> <property name="username" value="root"/><property name="password" value="root"/> </dataSource> </environment> </environments> <mappers> <mapper resource="com/leon/mapper/UserMapper.xml"/> </mappers> </configuration>

編寫測試代碼

//加載核心配置文件 InputStream resourceAsStream = Resources.getResourceAsStream("SqlMapConfig.xml"); //獲得sqlSession工廠對象 SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream); //獲得sqlSession對象 SqlSession sqlSession = sqlSessionFactory.openSession(); //執行sql語句 List<User> userList = sqlSession.selectList("userMapper.findAll"); //打印結果 System.out.println(userList); //釋放資源 sqlSession.close();

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總結

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