java 读取properties 配置文件

	private static final String FILENAME = "dll/service.properties";
	private static Properties properties = null;
	
	//静态块
	static{
		
		properties = new Properties();
		InputStream in = null;
		
		try {
			//读取服务文件
			in = new FileInputStream(FILENAME);
			properties.load(in);
		} catch (IOException e) {
			ErrorPrint.sprintLog(e, log,"加载service.properties配置文件");
			e.printStackTrace();
		}finally{
			
			try {
				in.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	
	/**
	 * 获取service.properties文件
	 * @param key
	 * @return
	 */
	public static String getPropertiesValue(String key){
		if (properties.containsKey(key)) {
			String value = properties.getProperty(key);// 得到某一属性的值
			return value;
		} else
			return "";
		
	}