AddressServlet.java
package cn.bestchance.servlet;
import java.io.IOException;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.bestchance.dao.AddressDao;
import cn.bestchance.dao.impl.AddressDaoImpl;
import cn.bestchance.entity.Address;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
@WebServlet("/addressSerlvet")
public class AddressSerlvet extends HttpServlet {
private static final long serialVersionUID = 1L;
private AddressDao dao = new AddressDaoImpl();
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
String method=request.getParameter("method");
if("provincial".equals(method)){
getProvincial(request, response);
}
if("city".equals(method)){
getCity(request, response);
}
if("area".equals(method)){
getArea(request, response);
}
}
/**
* 根据市id获取该市下的区的全部信息
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
protected void getArea(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String cityId = request.getParameter("cityId");
// 从数据库中查询省的信息
ArrayList<Address> areaList = dao.getAreaByCityId(Integer.parseInt(cityId));
// 将集合转成json字符串
JSONObject jsonObj = new JSONObject();
JSONArray jsonArray = JSONArray.fromObject(areaList);
jsonObj.put("areaList", jsonArray);
String jsonDataStr = jsonObj.toString();
response.getWriter().print(jsonDataStr);
}
/**
* 获取省的信息 并相应
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
protected void getProvincial(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// 从数据库中查询省的信息
ArrayList<Address> addrList = dao.getProvince();
// 将集合转成json字符串
JSONObject jsonObj = new JSONObject();
JSONArray jsonArray = JSONArray.fromObject(addrList);
jsonObj.put("addrList", jsonArray);
String jsonDataStr = jsonObj.toString();
response.getWriter().print(jsonDataStr);
}
/**
* 获取市的信息并相应
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
protected void getCity(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String provinceId = request.getParameter("provincial");
// 从数据库中查询省的信息
ArrayList<Address> addrList = dao.getCityByProvinceId(Integer.parseInt(provinceId));
// 将集合转成json字符串
JSONObject jsonObj = new JSONObject();
JSONArray jsonArray = JSONArray.fromObject(addrList);
jsonObj.put("cityList", jsonArray);
String jsonDataStr = jsonObj.toString();
response.getWriter().print(jsonDataStr);
}
}
