loadcityservlet.java

网上订餐系统

package com.newer.ajax.servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import com.newer.ajax.dao.UserDao;
import com.newer.bean.User;

public class LoadCityServlet extends HttpServlet {

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		String province = request.getParameter("province");
		//设置响应格式
		response.setContentType("text/HTML;charset=UTF-8");
		PrintWriter out = response.getWriter();
		
		StringBuffer cityStr = new StringBuffer();
		if("1".equals(province)){
			cityStr.append("  <option value='1'>").append("长沙").append("</option>");
			cityStr.append("  <option value='2'>").append("株洲").append("</option>");
			cityStr.append("  <option value='3'>").append("湘潭").append("</option>");
		}else if("2".equals(province)){
			cityStr.append("  <option value='1'>").append("广州").append("</option>");
			cityStr.append("  <option value='2'>").append("深圳").append("</option>");
			cityStr.append("  <option value='3'>").append("东莞").append("</option>");
		}
		out.print(cityStr);
	}
	
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		doGet(request,response);
	}
}