readproperty.java

来自「一个java实现的有界面的email发送程序。可以从网络上抓取email。也可以」· Java 代码 · 共 53 行

package com.code10.access;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;

public class ReadProperty {

    private  static ReadProperty instance = null;
	Properties prop= null;
	String fileName;
    private ReadProperty(){
  		 fileName="/config.property";
  		 prop= new Properties();
			try {
				InputStream is = getClass().getResourceAsStream(fileName);
				prop.load(is);
				if(is!=null) is.close();
			}
			catch(Exception e) {
				System.out.println(e+"file "+fileName+" not found");
			}
    }

    public static synchronized ReadProperty newInstance()
    {
       if(instance==null)
         instance=new ReadProperty();
          return instance;
    }
    
	public  String getPara(String name) {
		return prop.getProperty(name);
	}
	
	public void setPara(String name,String value){
		try {
			OutputStream fos = new FileOutputStream("config.property");
			prop.setProperty(name,value);
			prop.store(fos, null);
			fos.flush();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e){
			e.printStackTrace();
		}
	}
}