jsp implementation Click help to open the chm file

Description of handling problems: Now I have an javaweb project. I need to click help on portal to open the "help.chm" file.

At present, there is no similar case in Search Baidu, so I have come up with a way to realize it through jsp:

jsp main interface file

<a href="#" onclick="javascript:$.getJSON('<%=path %>/admin/openYACShelp.jsp?req='+new Date(),function(json) {});"
id="openYACShelp"> help </a>

openYACShelp jsp file

<%
String ch1="/";
String ch2="//";

String contextPath = System.getProperty("user.dir");
String helpFilePath = contextPath + "/yacs/ help .chm";

Runtime.getRuntime().exec("hh.exe "+helpFilePath.replaceAll(ch1,ch2)); %>