citycontroller.java

jQuery 由 John Resig 创建于 2006 年初

package controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

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

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import dao.CityDAO;
import entity.City;

public class CityController extends HttpServlet{
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		response.setCharacterEncoding("UTF-8");
		request.setCharacterEncoding("UTF-8");
		
		String type = request.getParameter("type");
		JSONArray array = new JSONArray();
		List<City> list = null;
		if("parent".equals(type)){
			CityDAO cityDAO = new CityDAO();
			list = cityDAO.getParent();
		}else if("child".equals(type)){
			int parent = Integer.parseInt(request.getParameter("parent"));
			CityDAO cityDAO = new CityDAO();
			list = cityDAO.getChild(parent);
		}
		
		for(City city : list){
			JSONObject object = new JSONObject();
			try {
				object.put("id", city.getId());
				object.put("name", city.getName());
			} catch (JSONException e) {
				e.printStackTrace();
			}
			array.put(object);
		}
		
		PrintWriter out = response.getWriter();
		
		System.out.println(array.toString());
		out.print(array.toString());
		out.flush();
		out.close();
	}
	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}
}