UrlFilter.java 文件源码

@Override
public void doFilter(ServletRequest srequset, ServletResponse sresponse, FilterChain filterChain)
        throws IOException, ServletException {
    //new两个，一个用来遍历，一个用来换数据
    CumServlet cumRequestWrapper=new CumServlet((HttpServletRequest) srequset);
    CumServlet cumRequestWrapper2=new CumServlet((HttpServletRequest) srequset);
    Iterator<Entry<String, String[]>> iterator = cumRequestWrapper.getParams().entrySet().iterator();
    while(iterator.hasNext()){
        Entry<String, String[]> next = iterator.next();
        String key = next.getKey();
        //解码两次
        String decode = URLDecoder.decode(next.getValue()[0], "utf-8");
        String decode2 = URLDecoder.decode(decode, "utf-8");
        cumRequestWrapper2.addParameter(key, decode2);
    }
       filterChain.doFilter(cumRequestWrapper2, sresponse);  

}