code: public static <T> T readObjectFromXml(File source) throws IOException {
  		return readObjectFromXml(new InputSource(FileUtil.getInputStream(source)));
  	}
docs: 从XML中读取对象 Reads serialized object from the XML file.
  
  @param <T> 对象类型
  @param source XML文件
  @return 对象
  @throws IOException IO异常