Test queryParameter ?

result_ng.txt

$ curl --dump-header - "http://localhost:8080/?q1=1&q2=2?q2=2"
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: text/plain
Content-Length: 21
Date: Fri, 28 Feb 2014 08:15:22 GMT

q2 => 2?q2=2
q1 => 1

result_ok.txt

$ curl --dump-header - "http://localhost:8080/?q1=1&q2=2&q2=2"
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: text/plain
Content-Length: 19
Date: Fri, 28 Feb 2014 08:14:52 GMT

q2 => 2, 2
q1 => 1

TestServket.java

package org.jami;

import javax.servlet.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Map;


public class TestServlet implements Servlet{
    @Override
    public void init(ServletConfig servletConfig) throws ServletException {}

    @Override
    public ServletConfig getServletConfig() {
        return null;
    }

    @Override
    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {

        Map map = servletRequest.getParameterMap();

        String params = "";

        for(Object e : map.entrySet()){
            Map.Entry entry = (Map.Entry) e;

            String key = entry.getKey().toString();
            Object v = entry.getValue();
            String value = "";
            if(v instanceof String){
                value = (String)v;
            }else if(v instanceof String[]){
                String[] vs = (String[])v;
                for(String e2 : Arrays.asList(vs)){
                    value += e2 + ", ";
                }
                if(value.endsWith(", ")){
                    value = value.substring(0, value.length()-2);
                }
            }else{
                value = v.toString();
            }

            params += (key + " => " + value) + "\n";

        }

        servletResponse.setContentType("text/plain");
        PrintWriter writer = servletResponse.getWriter();

        writer.write(params);
        writer.close();

    }

    @Override
    public String getServletInfo() {
        return null;
    }

    @Override
    public void destroy() {}
    
}