Question

java修改请求参数的值

Answer 1

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
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();

Answer 2

传的参数是一个对象就可以了。对象是传址的。

Answer 3

request.setAttribute(String str,Object obj);