Properties学习

public static void main(String[] args) throws IOException {
		//Properties 线程安全
		Properties d = new Properties();
		d.setProperty("age", "16");
		d.setProperty("school", "hr");
		Properties p = new Properties(d);// 默认 Properties
		p.load(Temp.class.getClassLoader().getSystemResourceAsStream("temp.properties"));
		p.list(System.out);
		
		//遍历key
		Set<String> keys = p.stringPropertyNames();
		for (String key : keys) {
			System.out.print("key:" + key);
			System.out.println(" value:" + p.getProperty(key));
		}
		//若无key为myplace的值则默认为blog
		System.out.println(p.getProperty("myplace", "blog"));
		
		//由于properties对中文的支持不完善，所以现在更流行通过XML的方式来配置属性，加载XML的方式也同样简单
		Properties bundle = new Properties();  
		bundle.loadFromXML(new FileInputStream(new File("messages.xml")));  
	}