JDBC的批处理

批处理的好处：提高了数据的传输效率。

prepareStatement实现批处理：

import java.sql.*;

public class TestPreparedStatement {
	public static void main(String[] args){
		Connection conn=null;
		PreparedStatement pstm=null;
	  
		try{
			conn=ConnectTool.getConnection();
			conn.setAutoCommit(false);
			String sql="update emp set sal=10000 where empNo=?";
			pstm=conn.prepareStatement(sql);
			
			pstm.setInt(1, 7654);
			pstm.addBatch();
			
			pstm.setInt(1, 7782);
			pstm.addBatch();
			
			int[] a=pstm.executeBatch();
			for(int i:a){
				System.out.println(i);
			}
			conn.commit();
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			ConnectTool.releasersc(null, pstm, conn);
		} 
	}

}

以下是通过statement实现批处理：

import java.sql.*;
public class TestBatchTransaction {
	public static void main(String args[]){
		Connection conn=null;
	   Statement stm=null;
		PreparedStatement pstm=null;
		ResultSet rs=null;
		
		try{
			conn=ConnectTool.getConnection();
			conn.setAutoCommit(false);
		  String sql="update emp set Ename='cning' where MGR=7902";
		  String sql1="delete from emp where empno=7369";
	
		  stm=conn.createStatement();
		  stm.addBatch(sql);
		  stm.addBatch(sql1);
		  int[]a=stm.executeBatch();
		  for(int i=0;i<a.length;i++){
			  System.out.println(a[i]);
		  }
		  conn.commit();
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			ConnectTool.releasersc(null, pstm, conn);
		}
		
	}

}