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  • [转载] 关于PreparedStatement.addBatch()方法

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

    //记录3
    statement.setInt(1, 3);
    statement.setString(2, "Mark");
    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","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();
        };

    链接:http://blog.csdn.net/blueling51/article/details/6928755

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  • 原文地址:https://www.cnblogs.com/seabird1979/p/4893737.html
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