commdao.java

企业OA管理系统

package com.tingsun.oa.dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class CommDAO {
	
	public Connection getConn(){
		Connection conn = null;
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			conn =DriverManager.getConnection(//创建数据连接
					"jdbc:oracle:thin:@127.0.0.1:1521:gdb", "med", "med");			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}//oracle 装载驱动，加入java 对象

		return conn;
	}
	
	public void closeConn(Connection conn){
		try {
			conn.close();			
		} catch (Exception e) {
			// TODO Auto-generated catch block
		//	e.printStackTrace();
		}
	}
	public void closeConn(Connection conn,Statement stmt,ResultSet rs){
		try {
			if(rs!=null){
				rs.close();
			}
			if(stmt!=null){
				stmt.close();
			}
			if(conn!=null){
				conn.close();
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
		//	e.printStackTrace();
		}
	}	
	public void closeConn(Connection conn,PreparedStatement pst){
		try {
			if(pst!=null){
				pst.close();
			}
			if(conn!=null){
				conn.close();
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
		//	e.printStackTrace();
		}
	}		
	public void closeConn(Connection conn,PreparedStatement pst,ResultSet rs){
		try {
			if(rs!=null){
				rs.close();
			}			
			if(pst!=null){
				pst.close();
			}
			if(conn!=null){
				conn.close();
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
		//	e.printStackTrace();
		}
	}		
}