dbconnection.java

来自「StrustStart框架的一个小小的应用 为了更方便程序员开发」· Java 代码 · 共 65 行

package com.ebuji.util;

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

import javax.sql.DataSource;
import javax.naming.Context;
import javax.naming.InitialContext;

public class DBConnection {
	public static Connection getConnection(){
		Connection conn=null;
		try {
			Context cxt=new InitialContext();
			DataSource ds=(DataSource)cxt.lookup("java:comp/env/jdbc/test");
			conn=ds.getConnection();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;
	}
	
	public static void closeResultset(ResultSet rs){
		if(rs!=null){
			try {
				rs.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	public static void closeStatement(PreparedStatement pstmt){
		if(pstmt!=null){
			try {
				pstmt.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	public static void closeConnection(Connection conn){
		if(conn!=null){
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	public static void close(ResultSet rs,PreparedStatement pstmt,Connection conn){
		closeResultset(rs);
		closeStatement(pstmt);
		closeConnection(conn);
	}
}