【webservice】获取省份下所有城市的天气状况

我们需要获取天气状况，首先我们需要进入天气提供的webservice接口

进入webservice的网站,然后我们进入天气接口服务

将服务的xml格式解析成java格式

然后将java格式的数据打成jar包，并将jar包引入到项目中

最后我们再引入webservice相关jar包，以及将集合转换为json的jar包

这样，我们的准备工作就做好了

接下来我们就来实现功能:

我们首先写好前台页面，通过点击省份(由于这次只有一个省份，就使用点击事件来模拟了)来获取对应的城市信息(城市名，以及城市id)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>










   湖南省


   --请选择城市--

   

   XXXX
   
   
  

然后通过Servlet获取到对应的数据

package cn.qblank.servlet;

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

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

import cn.qblank.entity.City;
import cn.qblank.weather.WeatherWS;
import cn.qblank.weather.WeatherWSSoap;
import net.sf.json.JSONArray;

public class CityServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	private WeatherWS ws;
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//将省份的id传送过来
		request.setCharacterEncoding("utf-8");
		response.setContentType("application/json;charset=utf-8");
		response.setCharacterEncoding("utf-8");
		
		//获取省份的id
		String provinceCode = request.getParameter("province");
		WeatherWSSoap weatherWSSoap = ws.getWeatherWSSoap();
		List cityStrs = weatherWSSoap.getSupportCityString(provinceCode).getString();
//		Map map = new HashMap<>();
		List citys = new ArrayList<>();
		for (String cityStr : cityStrs) {
			int sp = cityStr.indexOf(",");
			String cityName = cityStr.substring(0, sp);
			String cityCode = cityStr.substring(sp + 1);
			//封装数据
			City city = new City();
			city.setCityCode(cityCode);
			city.setCityName(cityName);
			citys.add(city);
		}
		//将map集合转换为json对象
		String citysJson = JSONArray.fromObject(citys).toString();
		//测试数据
		System.out.println(citysJson);
		//以流的方式打印出去
		PrintWriter writer = response.getWriter();
		writer.write(citysJson);
		writer.flush();
		writer.close();
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}
	
	@Override
	public void init() throws ServletException {
		ws = new WeatherWS();
	}

}

这样，我们就实现了获取省份下的所有城市

接下来我们需要点击相应的城市，进行相应地播报城市的天气

点击城市，出发时间，从后台获取数据

后台WeatherServlet获取数据，并以O流的方式输出

package cn.qblank.servlet;

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 cn.qblank.weather.WeatherWS;
import cn.qblank.weather.WeatherWSSoap;

public class WeatherServlet extends HttpServlet{
	private static final long serialVersionUID = 1L;
	private WeatherWS ws;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		req.setCharacterEncoding("utf-8");
		resp.setContentType("text/html;charset=utf-8");
		resp.setCharacterEncoding("utf-8");
		
		String cityCode = req.getParameter("city");
		//通过webservice获取今天的天气
		WeatherWSSoap weatherWSSoap = ws.getWeatherWSSoap();
		List weathers = weatherWSSoap.getWeather(cityCode, "").getString();
		String weather = weathers.get(7) +"\r\n"+weathers.get(8)+"\r\n"+weathers.get(6);
		PrintWriter writer = resp.getWriter();
		writer.write(weather);
		writer.flush();
		writer.close();
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doGet(req, resp);
	}
	@Override
	public void init() throws ServletException {
		ws = new WeatherWS();
	}
}

这样我们就实现了获取一个省份下所有城市的天气情况