JDBC----学习（12）--批量处理SQL

1.Statement()批量处理（11119毫秒10000条数据）

@Test
public void testStatement() throws Exception {
	Connection connection = null;
	Statement statement =null;
	try {
		connection = JDBCTools.getConnection();
		statement = connection.createStatement();
		String sql = "";

		long begin = System.currentTimeMillis();
		for(int i = 0; i< 10000; i++){
			sql = "INSERT INTO CUSTOMERSS(ID ,NAME ,EMAIL ,BRITH,CORE ) VALUES ("+(i+1)+",'"+(i+1)+"_name','"+(i+1)+"_EMAIL','19-04-15',100)";
		        System.out.println(sql);
			statement.executeUpdate(sql);
		}
		long end = System.currentTimeMillis();
            System.out.println(end-begin);
	} catch (Exception e) {
		e.printStackTrace();
	} fially {
			JDBCTools.colse(statement, connection, null);
	}
}

2.PrepareStatement()批量处理（1125毫秒10000条数据）

@Test
public void testPrepareStatement() throws Exception {
	Connection connection = null;
	PreparedStatement preparedStatement =null;
	try {
		connection = JDBCTools.getConnection();
         JDBCTools.begin(connection);
		 String sql = "INSERT INTO CUSTOMERSS(ID ,NAME ,EMAIL ,BRITH,CORE ) VALUES (?,?,?,?,?)";
		preparedStatement = connection.prepareStatement(sql);
		Date date = new Date(new java.util.Date().getTime());
		long begin = System.currentTimeMillis();
		for(int i = 0; i< 10000; i++){
			preparedStatement.setInt(1, i+1);
			preparedStatement.setString(2, "name");
			preparedStatement.setString(3, "EMAI");
			preparedStatement.setDate(4,date );
			preparedStatement.setInt(5, 100);
			System.out.println(sql);
			preparedStatement.executeUpdate();
		}
		long end = System.currentTimeMillis();
            System.out.println(end-begin);
            JDBCTools.commit(connection);
	} catch (Exception e) {
		e.printStackTrace();
		JDBCTools.rollback(connection);
	} finally {
		JDBCTools.colse(preparedStatement, connection, null);
	}
}

3.Batch()批量处理（138毫秒10000条数据）

      •当需要成批插入或者更新记录时。可以采用Java的批量更新机制，这一机制允许多条语句一次性提交给数据库批量处理。

           通常情况下比单独提交处理更有效率

     •JDBC的批量处理语句包括下面两个方法：

          –addBatch(String)：添加需要批量处理的SQL语句或是参数；

          –executeBatch（）；执行批量处理语句；

	@Test
	public void testBatch() throws Exception {
		Connection connection = null;
		PreparedStatement preparedStatement =null;
		try {
		 	 connection = JDBCTools.getConnection();
             JDBCTools.begin(connection);
			 String sql = "INSERT INTO CUSTOMERSS(ID ,NAME ,EMAIL ,BRITH,CORE ) VALUES (?,?,?,?,?)";
			 preparedStatement = connection.prepareStatement(sql);
			 Date date = new Date(new java.util.Date().getTime());

			long begin = System.currentTimeMillis();
			for(int i = 0; i< 10000; i++){
				preparedStatement.setInt(1, i+1);
				preparedStatement.setString(2, "name");
				preparedStatement.setString(3, "EMAI");
				preparedStatement.setDate(4,date );
				preparedStatement.setInt(5, 100);
				//积攒SQL
				preparedStatement.addBatch();
				//达到一定数据后发送SQL
				if ((i+1)%300 == 0 ) {
					//执行
					preparedStatement.executeBatch();
					//清空
					preparedStatement.clearBatch();
				}
			}
			if (10000 % 300 != 0 ) {
				preparedStatement.executeBatch();
				preparedStatement.clearBatch();
			}
			long end = System.currentTimeMillis();
             System.out.println(end-begin);
             JDBCTools.commit(connection);
		} catch (Exception e) {
			e.printStackTrace();
			JDBCTools.rollback(connection);
		} finally {
			JDBCTools.colse(preparedStatement, connection, null);
		}
	}