package edu.hhxy.btais.util;

import java.io.IOException;
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 MyBatisUtil {
    private static SqlSession session = null;

    public static SqlSession createSeqSession() {
        try {
            // 1、创建配置文件(mybatis-config.xml)的输入流
            InputStream is = Resources
                    .getResourceAsStream("mybatis-config.xml");
            // 2、创建SQLSessionFactory
            SqlSessionFactory factory = new SqlSessionFactoryBuilder()
                    .build(is);
            // 3、创建SQLSessioin
            session = factory.openSession();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return session;
    }

    public static void closeSeqSession(SqlSession sqlSession) {
        try {
            sqlSession.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            sqlSession = null;
        }
    }
}

<?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>
        <package name="edu.hhxy.btais" />
    </typeAliases>
    <!-- 在properties之后加上typeAliases -->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <!-- 配置mybatis的pooled的数据源 -->
            <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>
        <package name="edu.hhxy.btais"/>
    </mappers>
</configuration>

package edu.hhxy.btais;

import org.apache.ibatis.session.SqlSession;
import org.junit.Test;

import edu.hhxy.btais.mapper.UserMapper;
import edu.hhxy.btais.util.MyBatisUtil;

public class TestMybatisByMapperAnnotation {

    @Test
    public void addTest() {
        SqlSession session = null;
        try {
            session = MyBatisUtil.createSeqSession();
            User u = new User();
            u.setNickname("猪八戒");
            u.setPassword("123");
            u.setType(1);
            u.setUsername("bajie");
            session.getMapper(UserMapper.class).add(u);
            session.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            MyBatisUtil.closeSeqSession(session);
        }
    }
}