三. 使用PreparedStatement批量执行SQL语句的方法

PreparedStatement批量执行SQL语句是通过addbatch()来实现的，主要包含如下步骤：

1.建立链接

Connection    connection =getConnection();

2.不自动提交(Commit)

connection.setAutoCommit(false);  

3.预编译SQL语句

PreparedStatement statement = connection.prepareStatement("INSERT INTO TABLEX VALUES(?, ?)");  

4.逐个添加需要执行的插入语句

//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();  
//提交
connection.commit();

上面的SQL语句结构相同，只是具体的参数值不同，不仅如此，addBatch也可以批量执行不同结构的SQL语句，如下所示：

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();

下面是另一个例子：

    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();
    };