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java.lang.IllegalStateException: No modifications are allowed to a locked ParameterMap。网上查了一些资料，解决方案是使用Wrapper,重写HttpServletRequestWrapper,如下:
Java代码 收藏代码
package com.gdcn.bpaf.security.yale;

import java.util.Enumeration;
import java.util.Map;
import java.util.Vector;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

@SuppressWarnings("unchecked")
public class ParameterRequestWrapper extends HttpServletRequestWrapper {

private Map params;

public ParameterRequestWrapper(HttpServletRequest request, Map newParams) {
super(request);
this.params = newParams;
}

public Map getParameterMap() {
return params;
}

public Enumeration getParameterNames() {
Vector l = new Vector(params.keySet());
return l.elements();