JDBC连接Oracle的几个例子

1、批量执行

package com.oracle;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class pichuliConnection {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@//localhost:1521/ORCL","scott","123456");
    PreparedStatement ps=null;
	try {
		String sql="update emp set sal=sal+100 where empno=?";
		ps=conn.prepareStatement(sql);
		ps.setInt(1,7499);        //参照的是emp表
		ps.addBatch();      
		
		ps.setInt(1,7369);
		ps.addBatch();
		
		int[] ret=ps.executeBatch();      //executeBatch()返回的值是一个int类型
		System.out.println("修改成功");
	} catch (Exception e) {
		System.out.println("出错..."+e.getMessage());
	}
	finally {
		if(ps!=null)
			ps.close();
		if(conn!=null)
			conn.close();
	}
	
    }
}

 

2、使用事物转账

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class accountConnection {
  public static void main(String[] args) throws ClassNotFoundException, SQLException {
	  Class.forName("oracle.jdbc.driver.OracleDriver");
  	//获取连接
  Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@//localhost:1521/ORCL","scott","123456");
  conn.setAutoCommit(false);     //因为在默认状态下，执行成功的语句会默认的提交，所以事先设置为不自动提交。
  PreparedStatement ps=null;
  try {
	String sql1="update account set balance=balance+1000 where id=?";
	  String sql2="update account set balance=balance-1000 where id=?";
	  ps=conn.prepareStatement(sql1);
	  ps.setString(1, "111111");
	  int ret1=ps.executeUpdate();
	  
	  ps=conn.prepareStatement(sql2);
	  ps.setString(1, "222222");
	  int ret2=ps.executeUpdate();
	  conn.commit();         // 如果两个语句都执行成功，就让语句提交，
	  System.out.println("chenggong");
} catch (Exception e) {
	conn.rollback();       //否则就让他回滚到执行2条语条前的状态   
	System.out.println("shibai"+e.getMessage());
}finally {
	if(ps!=null) {
		ps.close();
	}
	if(conn!=null) {
		conn.close();
	}
}
  
}
}

事物处理在ORACLE数据库中

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