spring UrlFilter

package com.filter;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
/**
* 配置编码过滤器
* @author HILL
*
*/
public class UrlFilter implements Filter {

@Override
public void destroy() {
// TODO Auto-generated method stub

}

public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest myReq = (HttpServletRequest) request;
HttpServletResponse myRes = (HttpServletResponse) response;
String requestURL = myReq.getRequestURI();
if (!requestURL.equals("/login") && !requestURL.equals("/user/login")
&& !requestURL.equals("/user/login.jsp")
&& !requestURL.equals("/admin/login.jsp")) {
if (requestURL.equalsIgnoreCase("/login")
|| requestURL.equalsIgnoreCase("/user/login")
|| requestURL.equalsIgnoreCase("/user/login.jsp")
|| requestURL.equalsIgnoreCase("/admin/login.jsp")) {
PrintWriter out = myRes.getWriter();
out.println("<script language=\"javascript\">window.location.href=\""
+ myReq.getContextPath()
+ requestURL.toLowerCase()
+ "\";</script>");
return;
}
}
chain.doFilter(request, response);
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}

}