Delphi调用Servlet

一直想让Delphi做为RIA，而业务层使用Java！今天没事做，简单实现了一下！
目前有2种方案：
WebService
IndyHttp调用Servlet
以下是用IndyHttp来调用Servlet
一、先写一个helloworld的Servlet
1.编写ui以及service
//工具包
package com.cdrs.jutils;
import java.io.IOException;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public abstract class FormObject extends HttpServlet {

protected static final String ACTION = "ACTION";
public FormObject() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

}

@SuppressWarnings("deprecation")
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Date date = new Date();
System.out.println(date.getHours()+date.getMinutes()+date.getSeconds());
performTask(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
public abstract void performTask(HttpServletRequest req,
HttpServletResponse res) throws ServletException, IOException;
}
//ui包
package com.cdrs.servlettest.ui;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.cdrs.jutils.FormObject;
import com.cdrs.servlettest.service.ServletTestService;
public class ServletTes