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public class MyRequestWarpper extends HttpServletRequestWrapper {
private HttpServletRequest request;
public MyRequestWarpper(HttpServletRequest request) {
super(request);
this.request = request;
}
@Override
public String getParameter(String parameter) {
if ("username".equals(parameter) && request.getParameter(parameter).equals("Jack")) {
return "Tom";
}
return request.getParameter(parameter);
}
}
request = new MyRequestWarpper(request);
filterChain.doFilter(request, response);