通过 jsp+ajax+servlet+webservice 远程访问天气预报服务

时间：2023-03-09 14:55:46
通过 jsp+ajax+servlet+webservice 远程访问天气预报服务

通过 jsp+ajax+servlet+webservice 远程访问天气预报服务
   - webservice 客户端访问的方式
     1. java代码来访问
     2. ajax 方式异步加载webservice

- 通过 ajax 异步加载 天气信息实现步骤：
     1. 了解远程第三方的天气预报webservice服务
        广东,31124   广州,2350   东莞,2351  深圳,2419   温度信息  String[8]
     2. wsimport 生成本地代理
     3. 准备一个index.jsp  页面，显示城市信息 ，下拉城市，显示天气信息  
     4. 准备一个weatherServlet ,通过它来访问webservcie
     5. Servlet要在web .xml注册

通过Jdk  
   声明 ：@Webservice
     发布 ：EndPoint
      不足： 希望tomcat启动时，webservice服务能够开启 ，最好与Spring集成
              希望有一个webservice的服务列表
   通过Webservice框架来实现 ：axis2  、xfire

1.通过wsimport生成本地代理与打成jar包

wsimport http://ws.webxml.com.cn/WebServices/WeatherWS.asmx?WSDL

发现产生错误:

将源码考到本地，将错误行删除(15,61,101),然后存为xml文件后重新进行wsimport，发现只有三个警告，同时生成对应的class文件打成jar包。

C:\Users\liqiang\Desktop>wsimport weather.xml

parsing WSDL...

[WARNING] Ignoring SOAP port "WeatherWSSoap12": it uses non-standard SOAP 1.2 bi

nding.

You must specify the "-extension" option to use this binding.

  line 533 of file:/C:/Users/liqiang/Desktop/weather.xml

[WARNING] ignoring port "WeatherWSHttpGet": no SOAP address specified. try runni

ng wsimport with -extension switch.

  line 536 of file:/C:/Users/liqiang/Desktop/weather.xml

[WARNING] ignoring port "WeatherWSHttpPost": no SOAP address specified. try runn

ing wsimport with -extension switch.

  line 539 of file:/C:/Users/liqiang/Desktop/weather.xml

Generating code...

Compiling code...

C:\Users\liqiang\Desktop>jar -cvf weather.jar ./cn

2.index.jsp:选择地区的时候异步请求天气情况

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

  <script type="text/javascript" src="jquery-1.8.2.js"></script>

  </head>

  <body>

   <select id="province">

   <option value="31124">广东省</option>

   </select>

   <select id="city">

   <option value="2350">广州</option>

   <option value="2419">深圳</option>

   <option value="2351">东莞</option>

   </select>

   <hr/>

   <span>XXXX</span>

   <script type="text/javascript">

     $("#city").change(function(){

       var city=$("#city option:selected").val();

       $.post("weatherServlet",{"city":city},function(backdata){

         $("span").text(backdata).css("color","blue");

       });

     });

   </script>

  </body>

</html>

3.接收请求的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.com.webxml.WeatherWS;

import cn.com.webxml.WeatherWSSoap;

public class WeatherServlet extends HttpServlet {

    private WeatherWS ws;

    public WeatherServlet() {

        super();

    }

    public void destroy() {

        super.destroy(); // Just puts "destroy" string in log

        // Put your code here

    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        this.doPost(request, response);

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        request.setCharacterEncoding("UTF-8");

        String cityCode=request.getParameter("city");

        System.out.println("获取城市的id"+cityCode);

        //通过webservice获取远程的天气预报信息

        WeatherWSSoap weatherWSSoap = ws.getWeatherWSSoap();

        List<String> weathers = weatherWSSoap.getWeather(cityCode, "").getString();

        String weather=weathers.get(8);//取得温度信息

        //把结果回显给页面

        response.setContentType("text/html;charset=UTF-8");

        PrintWriter printWriter=response.getWriter();

        printWriter.write(weather);

        printWriter.flush();

        printWriter.close();

    }

    public void init() throws ServletException {

        // Put your code here

        ws=new WeatherWS();

    }

}

效果:

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