java读写配置文件

读文件

Properties p1 = new Properties(); 
        int accountTotal_last = 0;        
        try {  
        	InputStream inputStream = new FileInputStream(this.getClass().getResource("/amount.properties").getPath());
            p1.load(inputStream);   
            accountTotal_last =Integer.parseInt(p1.getProperty(yesterday));	
            inputStream.close();
        } catch (IOException e) {  
            e.printStackTrace();  
        }  

写文件

InputStream inputStream;
        Properties p2 = new Properties();          
        try {     
        	inputStream = new FileInputStream(this.getClass().getResource("/amount.properties").getPath());
            p2.load(inputStream);  
            OutputStream fos;
            fos = new FileOutputStream(this.getClass().getResource("/amount.properties").getPath());
			DateFormat df=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		    p2.setProperty(today, String.valueOf(amountTotal));
		    p2.store(fos, df.format(new Date()));
            inputStream.close();
		    fos.close();
        } catch (IOException e) {  
            e.printStackTrace();  
        }