MYBAITS1 第一个程序

1.安装maven

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>x.x.x</version></dependency>

注意：加一个logger 这个参考官方文档

2.创建一个实体类，和dao层

class类  student
private int id;
private String name;
private String grade;
dao层
studentDao层
insertStudent(Student student);
updateStudent(Student student);
delStudent(Student student);
selectStudent(int id);        //只测试查询，此列子
dao层的xml
studentDao层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=“org.mybatis.example.studentDao“>
   <select id=“selectStudent“ resultType=“student“>
       select * from student where id = #{id}
    </select>
</mapper>

配置mybaits.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>
     <environments default=“development”>
     <environment id=“development”>
     <transactionManager type=“JDBC”/>
     <dataSource type=“POOLED”>
        <property name=“driver” value=“${driver}”/>
        <property name=“url” value=“${url}”/>
        <property name=“username” value=“${username}”/>
        <property name=“password” value=“${password}”/>
     </dataSource>
    </environment>
</environments>
<mappers>
<mapper resource=“org/mybatis/example/studentMapper.xml”/>
</mappers>
</configuration>

测试类

@test
public void test(){
    String resource = “org/mybatis/example/mybatis-config.xml”;
   InputStream inputStream = Resources.getResourceAsStream(resource);
  SqlSessionFactory sqlSessionFactory = new   SqlSessionFactoryBuilder().build(inputStream);
    SqlSession session = sqlSessionFactory.openSession();
   try {
        student student= session.selectStudent(1);
          syso(student);
   } finally {
    session.close();
   }
}