关于PreparedStatement.addBatch()方法 (转)

?

Statement和PreparedStatement的区别就不多废话了,直接说PreparedStatement最重要的addbatch()结构的使用.

1.建立链接,(打电话拨号 )????

?? Connection??? connection =getConnection();

2.不自动 Commit (瓜子不是一个一个吃,全部剥开放桌子上,然后一口舔了)

connection.setAutoCommit(false);???

3.预编译sql语句,只编译一回哦,效率高啊.(发明一个剥瓜子的方法,以后不要总想怎么剥瓜子好.就这样剥.)
PreparedStatement statement = connection.prepareStatement("INSERT INTO TABLEX VALUES(?,?)");???

4.来一个剥一个,然后放桌子上

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

//记录2
statement.addBatch();???

//记录3
statement.addBatch();???

//批量执行上面3条语句. 一口吞了,很爽
int [] counts = statement.executeBatch();???

//Commit it 咽下去,到肚子(DB)里面
connection.commit();

stmt.addBatch("update? TABLE1 set 题目="盛夏话足部保健1"?? where id="3407"");
stmt.addBatch("update? TABLE1 set 题目="夏季预防中暑膳食1" where id="3408"");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("11","12","13","","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("12","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("13","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("14","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("15","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("16","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("17","")");
stmt.addBatch("INSERT INTO? TABLE1? VALUES("18","")");

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();
??? };

本文转自：http://blog.csdn.net/blueling51/article/details/6928755。

（编辑：北几岛）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!