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Java code:

private String getPara(String param,HttpServletRequest request) {
// Enumeration enu = request.getParameterNames();
Enumeration enu = request.getHeaderNames();
while(enu.hasMoreElements()){
String paraName=(String)enu.nextElement();
System.out.println(paraName+": "+request.getParameter(paraName));
if(param.equalsIgnoreCase(paraName)) {
return request.getParameter(paraName);
}
}
return "";
}