[轉]關於PreparedStatement.addBatch()方法

Statement和PreparedStatement的區別就很少廢話了,直接說PreparedStatement最重要的addbatch()結構的使用.

1.創建連接,(打電話撥號 )    

   Connection    connection =getConnection();

2.不自動 Commit (瓜子不是一個一個吃,所有剝開放桌子上,而後一口舔了)

//          setAutoCommit(true)：sql命令的提交（commit）由驅動程序負責
//          setAutoCommit(false)：sql命令的提交由應用程序負責，程序必須調用commit或者rollback方法

 connection.setAutoCommit(false);  

3.預編譯SQL語句,只編譯一回哦,效率高啊.(發明一個剝瓜子的方法,之後不要總想怎麼剝瓜子好.就這樣剝.)
PreparedStatement statement = connection.prepareStatement("INSERT INTO TABLEX VALUES(?, ?)");   

4.來一個剝一個,而後放桌子上

//記錄1
statement.setInt(1, 1); 
statement.setString(2, "Cujo"); 
statement.addBatch();   

//記錄2
statement.setInt(1, 2); 
statement.setString(2, "Fred"); 
statement.addBatch();   

//記錄3
statement.setInt(1, 3); 
statement.setString(2, "Mark"); 
statement.addBatch();   

//批量執行上面3條語句. 一口吞了,很爽
int [] counts = statement.executeBatch();   

//Commit it 嚥下去,到肚子(DB)裏面
connection.commit();

stmt.addBatch("update  TABLE1 set 題目="盛夏話足部保健1"   where id="3407"");
stmt.addBatch("update  TABLE1 set 題目="夏季預防中暑膳食1" where id="3408""); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("11","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("12","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("13","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("14","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("15","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("16","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("17","12","13","","")"); 
stmt.addBatch("INSERT INTO  TABLE1  VALUES("18","12","13","","")"); 

int [] updateCounts=stmt.executeBatch(); 
cn.commit();

例如:

    public static void execteBatch(Connection conn)throws Exception{        String sql1 = "delete from student where id =3 ";        String sql2 = "delete from student where id =5 ";        String sql3 = "delete from student where id =6 ";        String sql4 = "delete from student where id =7 ";        PreparedStatement pstmt = conn.prepareStatement(sql1);        pstmt.addBatch();        pstmt.addBatch(sql2);        pstmt.addBatch(sql3);        pstmt.addBatch(sql4);        pstmt.executeBatch();    };