Web开发配置文件无缓存加载

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直接贴代码：

/**
	 * 读取文件，若文件修改后则重新加载，否则使用缓存
	 * @param classpath
	 * @return
	 * @throws IOException
	 */
	public static String getTextByPathNoCached(String classpath) throws IOException {
		String filePath=getInstance().getClass().getResource(classpath).getFile();
		File currFile=new File(filePath);
		InputStream in=null;
		boolean modifiedB=isModified(classpath,currFile.lastModified());
		if(modifiedB){//重新加载
			  in =new FileInputStream(filePath);
		}else {
			  in = getInstance().getClass().getResourceAsStream(classpath);
			if (in == null) {
				throw new FileNotFoundException(classpath + "（系统找不到指定的文件。）");
			}
		}
	
		byte[] chs = new byte[in.available()];
		in.read(chs);
		in.close();
		return new String(chs, "utf-8");
	}
	/**
	 * 判断文件是否修改
	 * @param keypath
	 * @return
	 */
	public static boolean isModified(String keypath,long curr){	
		boolean isModified=false;
		String lastModified=System.getProperty(keypath);
		if(null==lastModified){
			System.setProperty(keypath, Long.valueOf(curr).toString());
		}else {
			long lastModifiedL=Long.valueOf(System.getProperty(keypath));
			isModified=curr!=lastModifiedL;
		}
		//更新最后一次修改时间
		/**if(isModified){
			System.setProperty(keypath, Long.valueOf(curr).toString());
		}**/
		log.info("File res:"+keypath+"\t is modified "+isModified);
		return isModified;
		
	}