MyBatis基本开发步骤

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//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.cj.jdbc.Driver"/><!--连接数据库三要素信息--><property name="url" value="jdbc:mysql://localhost:3306/javaweb"/><property name="username" value="1210449106"/><property name="password" value="qqmmyang1"/></dataSource></environment></environments><mappers><mapper resource="StudentMapper.xml"/></mappers>
</configuration>

1. xxxMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace=""><insert id="insertStu">INSERT INTO t_student(id,sname,sage,sex,addr_id) VALUES (null,'张十三',18,1,7)</insert>
</mapper>

1. 1. sql语句最后结尾可以不写“;”
  2. CarMapper.xml文件的名字不是固定的。可以使用其它名字。
  3. CarMapper.xml文件的位置也是随意的。这里选择放在resources根下，相当于放到了类的根路径下。
  4. 将CarMapper.xml文件路径配置到mybatis-config.xml：

编写测试类

1. 定位当前工程中mybatis核心配置文件存储位置
2. SqlSessionFacoryBuilder读取配置文件并交给SqlSessionFactory
3. SqlSessionFactory为开发人员提供SqlSession对象
4. SqlSession对象完成SQL语句推送

public class AppTest {@Testpublic void test1(){InputStream is = null;try {//1.定位当前工程中的mybatis-config-xml配置文件is = Resources.getResourceAsStream("mybatis-config.xml");//2.SqlSessionFactoryBuilder读取配置文件信息并交给SqlSessionFactorySqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(is);//3.SqlSessionFactory为开发人员提供SqlSessionSqlSession sqlSession = sqlSessionFactory.openSession(true);//4.SqoSession对象帮助开发人员完成SQL语句推送int count = sqlSession.insert("com.wry.pojo.Student.insertStu");System.out.println(count);} catch (IOException e) {throw new RuntimeException(e);} finally {//资源关闭if (is != null) {try {is.close();} catch (IOException e) {throw new RuntimeException(e);}}}}@Testpublic void test02(){InputStream is = null;try {//生成SqlSessionFactoryBuilderSqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();//生成SqlSessionFactory对象SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(is = Resources.getResourceAsStream("mybatis-config.xml"));SqlSession sqlSession = sqlSessionFactory.openSession(true);//执行sql语句int count = sqlSession.insert("com.wry.pojo.Student.insertStu");System.out.println(count);} catch (Exception e) {throw new RuntimeException(e);} finally {if (is != null) {try {is.close();} catch (IOException e) {throw new RuntimeException(e);}}}}
}

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