env.java

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package com.xaccp.fileRead;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class Env extends Properties{
	private static Env instance = null;
	private Env(){
		InputStream is=getClass().getResourceAsStream("/db.properties");
		try {
			load(is);
		} catch (IOException e) {
			e.printStackTrace();
			System.out.println("属性文件没有找到！");
		}
	}
	private static synchronized void makeInstance(){
		if(instance == null){
			instance = new Env();
		}
	}
	
	public static Env getInstance(){
		if(instance != null){
			return instance;
		}else{
			makeInstance();
			return instance;
		}
	}	
}