一个简单的入门例程

1.添加jar包

2.可以创建一个jdbc.properties文件
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_mybatis
jdbc.username=root
jdbc.password=123456

3.建一个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>
    <properties resource="jdbc.properties"/>
    <typeAliases>
        <typeAlias alias="Student" type="com.java1234.model.Student"/>
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driverClassName}" />
                <property name="url" value="${jdbc.url}" />
                <property name="username" value="${jdbc.username}" />
                <property name="password" value="${jdbc.password}" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/java1234/mappers/StudentMapper.xml" />
    </mappers>
</configuration>

4.写个util
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;

public class SqlSessionFactoryUtil {

    private static SqlSessionFactory sqlSessionFactory;

    public static SqlSessionFactory getSqlSessionFactory(){
        if(sqlSessionFactory==null){
            InputStream inputStream=null;
            try{
                inputStream=Resources.getResourceAsStream("mybatis-config.xml");
                sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
        return sqlSessionFactory;
    }

    public static SqlSession openSession(){
        return getSqlSessionFactory().openSession();
    }
}

5.写一个StudentMapper借口

import com.java1234.model.Student;

public interface StudentMapper {

    public int add(Student student);
}

6.写对应的StudentMapper.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.java1234.mappers.StudentMapper">

    <insert id="add" parameterType="Student"  >
        insert into t_student values(null,#{name},#{age})
    </insert>

</mapper>

7.import org.apache.ibatis.session.SqlSession;

import com.java1234.mappers.StudentMapper;
import com.java1234.model.Student;
import com.java1234.util.SqlSessionFactoryUtil;

public class StudentTest {

    public static void main(String[] args) {
        SqlSession sqlSession=SqlSessionFactoryUtil.openSession();
        StudentMapper studentMapper=sqlSession.getMapper(StudentMapper.class);
        Student student=new Student("ÀîËÄ",11);
        int result=studentMapper.add(student);
        sqlSession.commit();
        if(result>0){
            System.out.println("Ìí¼Ó³É¹¦£¡");
        }
    }
}