ajaxservlet.java

这是本人最初练习ajax时的小程序,是用ＪＳＰ写的

package com.chinasoft.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.*;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.chinasoft.servlet.AjaxDAO;


/**
 * Servlet implementation class for Servlet: AjaxServlet
 *
 */
 public class AjaxServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public AjaxServlet() {
		super();
	}   	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		try {
			Process(request,response);
		} catch (ServletException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}// TODO Auto-generated method stub
	}  	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		try {
			Process(request,response);
		} catch (ServletException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}// TODO Auto-generated method stub
	}  
	protected void Process(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException, SQLException{
		AjaxDAO ajaxdao=new AjaxDAO();
		//AjaxDTO ajaxdto=new AjaxDTO();
		List ajaxlist=ajaxdao.getMenu();
		PrintWriter out=response.getWriter();
		response.setContentType("text/HTML");
	//	out.println("<option value='0' selected>asdf</option>");
		out.println("[");
		Iterator it=ajaxlist.iterator();
		while(it.hasNext()){
			AjaxDTO ajaxdto=new AjaxDTO();
			ajaxdto=(AjaxDTO)it.next();
			int i=ajaxdto.getId();
			out.println("\""+i+"\"");
			out.println(",");
			out.println("\""+ajaxdto.getName()+"\"");
			out.println(",");
//			out.println("<option value=\""+i+"\">"+ajaxdto.getName()+"</option>");
					
		}
		out.println("0]");
	}
}