在解析XML文件时：
org.dom4j.DocumentException: Error on line 1 of document : An invalid XML character (Unicode: 0x5) was found in the element content of the document. Nested exception: An invalid XML character (Unicode: 0x5) was found in the element content of the document.
at org.dom4j.io.SAXReader.read(SAXReader.java:482)
at org.dom4j.DocumentHelper.parseText(DocumentHelper.java:278)
解决方法：
content = content.replaceAll("[\x00-\x08\x0b-\x0c\x0e-\x1f]", "");