Java数据库——事务处理

 

在数据库中执行5条SQL语句，这些SQL语句本身需要保持一致，即要么同时成功，要么同时失败

事务基本操作

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Scanner;

public class JDBC20_demo {
	
	//定义MySQL的数据库驱动程序
	public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
	//定义MySQL数据库的连接地址
	public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";
	//MySQL数据库的连接用户名
	public static final String DBUSER = "root";
	//MySQL数据库的连接密码
	public static final String DBPASS = "123456";
	
	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		
		  Connection conn = null;                     //数据库连接
	      Statement stmt = null; 						//数据库操作
	       
	      Class.forName(DBDRIVER);            //加载驱动程序
	      //连接MySQL数据库时，要写上连接的用户名和密码
	      conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);
	      conn.setAutoCommit(false);     		//取消自动提交
	      //实例化PreparedStatement
	      stmt = conn.createStatement();  	//实例化对象
	      //加入5条SQL语句
	      stmt.addBatch("INSERT INTO user(name,password,age,sex,birthday)"+"VALUES('lisi','lisimima',14,'男','1987-09-23')");
	      stmt.addBatch("INSERT INTO user(name,password,age,sex,birthday)"+"VALUES('lisi','lisimima',14,'男','1987-09-23')");
	      stmt.addBatch("INSERT INTO user(name1,password,age,sex,birthday)"+"VALUES('lisi','lisimima',14,'男','1987-09-23')");
	      stmt.addBatch("INSERT INTO user(name,password,age,sex,birthday)"+"VALUES('lisi','lisimima',14,'男','1987-09-23')");
	      stmt.addBatch("INSERT INTO user(name,password,age,sex,birthday)"+"VALUES('lisi','lisimima',14,'男','1987-09-23')");
	      try{
	    	  int temp[] = stmt.executeBatch(); 		//批量执行
	    	  System.out.println("更新了"+temp.length+"条数据。");
	    	  conn.commit();				//提交事务
	      }catch(Exception e){
	    	  try{
	    		  conn.rollback();
	    	  }catch(Exception ex){
	    		  ex.printStackTrace();
	    	  }
	      }
	      stmt.close();
	      conn.close();
	}

	public static void print(ResultSet rs,int re) throws Exception{
		if(re>0){
			rs.next();				//由前向后输出
		}else{
			rs.previous();		//有后向前输出
		}
		int id = rs.getInt(1);
		String name = rs.getString(2);
		String pass = rs.getString(3);
		int age = rs.getInt(4);
		String sex = rs.getString(5);
		java.util.Date d = rs.getDate(6);
		System.out.println("编号："+ id);
		System.out.println("姓名："+name);
		System.out.println("密码："+pass);
		System.out.println("年龄："+age);
		System.out.println("性别："+sex);
		System.out.println("生日："+d);
	}
}