public void batchInsertJdbc1() throws Exception
{DataSource ds  = (DataSource) SpringContextHolder.getBean( "dataSource" );Connection    conn    = ds.getConnection();Statement st  = conn.createStatement();String        sql = "insert into user(userid,username,birthday,salary) values('3000','武二郞',now(),8000);";for ( int i = 0; i < 5000; i++ ){st.addBatch( sql );}st.executeBatch();
}

private void jdbc2() throws Exception
{Connection     conn    = DBUtil.getConnection();String            sql = "insert into user values (?,?,?,?)";PreparedStatement  st  = conn.prepareStatement( sql );for ( int i = 0; i < 5000; i++ ){st.setString( 1, "3001" );st.setString( 2, "武二郞" );st.setDate( 3, null );st.setDouble( 4, 9000 );st.addBatch();}st.executeBatch();System.out.println( new Date() );st.close();conn.close();
}

public void batchInsert( List<UserPO> list )
{int    len = list.size();int  mod = 1000;int n   = len % mod == 0 ? len / mod : len / mod + 1;int    start   = 0;int    pos = 0;int    k   = mod;List subList = null;for ( int i = 0; i < n; i++ ){if ( len / (i + 1) < mod ){k = len % mod;}pos  += k;subList = list.subList( start, pos );userDao.batchInsert( subList );start += mod;}
}public void batchInsert( List<UserPO> list )
{this.insert( "cn.demo.dao.IUserDao.batchInsert", list );
}< insert id = "batchInsert" parameterType = "java.util.List" >insert into user( userid, username )values<foreach item = "o" collection = "list" index = "ind" separator = ",">(#{o.userId}, # { o.userName })< / foreach >< / insert>

public void batchInsertJdbc3( List<UserPO> list ) throws Exception
{greenhousegases.com( this.getClass() + " batchInsertJdbc3" );/** 新获取一个模式为BATCH，自动提交为false的session* 如果自动提交设置为true,将无法控制提交的条数，改为最后统一提交，可能导致内存溢出*/SqlSession  session = this.getSqlSessionTemplate().getSqlSessionFactory().openSession( ExecutorType.BATCH, false );UserPO      user    = null;try{for ( int i = 0; i < list.size(); i++ ){user = list.get( i );session.insert( "cn.demo.dao.IUserDao.insertUser", user );if ( (i + 1) % 1000 == 0 || i == list.size() - 1 ){/** greenhousegases.com(this.getClass()+" batchInsertJdbc3 commit " + i);* 手动每1000个一提交，提交后无法回滚*/session.commit();/* 清理缓存，防止溢出 */session.clearCache();}}}catch ( Exception e ) {session.rollback();e.printStackTrace();}finally {session.close();}
}