java读取jar里的文件

public static void main(String[] args) throws IOException {
		String jarPath = "omc-pm-server-eOMC910V100R001C00SPC100B020.jar";
		String res = readFileFromJar(jarPath,"pm.hbm.xml");
		System.out.println(res);
		  

	}
	/**
	 * 从jar中获取指定名称的文本文件
	 * 
	 * @param jarPath
	 * @param name
	 * @throws IOException
	 */
	public static String readFileFromJar(String jarPath ,String name) throws IOException {
		JarFile jf = new JarFile(jarPath);
		Enumeration<JarEntry> jfs = jf.entries();
		StringBuffer sb  = new StringBuffer();
		while(jfs.hasMoreElements())
		{
			JarEntry jfn = jfs.nextElement();
			if(jfn.getName().endsWith(name))
			{
				InputStream is = jf.getInputStream(jfn);
				BufferedInputStream bis = new BufferedInputStream(is);
				byte[] buf = new byte[is.available()];
				while(bis.read(buf)!=-1)
				{
					sb.append(new String(buf).trim());
				}
				bis.close();
				is.close();
				break;
			}
		}
		return sb.toString();
	}