request.getparameter returns corrupted characters

When inputs non-unicode characters (such as Japanese, Traditional Chinese),  system may returns corrupted characters during request.getParameter("XXX")

It is because the tomcat uses ISO-8859-1 as the default encoding...

Solutions:
1. By declaring page directive

<%@ page contentType="text/html;charset=UTF-8"%>

OR
2. Set the encoding before calling request.getParameter("XXX") in the page

<% 

request.setCharacterEncoding("UTF-8"); 

request.getParameter("XXX");

request.getParameter("YYY");

%>