java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For i

java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "</"

提交内容存在HTML 文本的时候 提交表单会报错 ，需要用工具修复一下

String jsonData = StringEscapeUtils.unescapeHtml(getRequest().getParameter("jsonData"));