WebService 获取天气预报

工具类

package com.ambow.invoic.utils;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


public class WeatherUtil {
     InputStream inStream;  
     Element root;  
     public InputStream getInStream() {  
         return inStream;  
     }  
     public void setInStream(InputStream inStream) {  
         this.inStream = inStream;  
     }  
     public Element getRoot() {  
         return root;  
     }  
     public void setRoot(Element root) {  
         this.root = root;  
     }  
     public WeatherUtil() {  
     }  

     /** 
      * 通过输入流来获取新浪接口信息 
      * @param inStream 
      */  
     public WeatherUtil(InputStream inStream) {  

         if (inStream != null) {  

             this.inStream = inStream;  

             DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();  

             try {  

                 DocumentBuilder domBuilder = domfac.newDocumentBuilder();  

                 Document doc = domBuilder.parse(inStream);  

                 root = doc.getDocumentElement();  

             } catch (ParserConfigurationException e) {  

                 e.printStackTrace();  

             } catch (SAXException e) {  

                 e.printStackTrace();  

             } catch (IOException e) {  

                 e.printStackTrace();  

             }  
         }  
     }  

     public WeatherUtil(String path) {  

         InputStream inStream = null;  

         try {  

             inStream = new FileInputStream(path);  

         } catch (FileNotFoundException e1) {  

             e1.printStackTrace();  

         }  

         if (inStream != null) {  

             this.inStream = inStream;  

             DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();  

             try {  

                 DocumentBuilder domBuilder = domfac.newDocumentBuilder();  

                 Document doc = domBuilder.parse(inStream);  

                 root = doc.getDocumentElement();  

             } catch (ParserConfigurationException e) {  

                 e.printStackTrace();  

             } catch (SAXException e) {  

                 e.printStackTrace();  

             } catch (IOException e) {  

                 e.printStackTrace();  

             }  
         }  
     }  

     public WeatherUtil(URL url) {  

         InputStream inStream = null;  

         try {  

             inStream = url.openStream();  

         } catch (IOException e1) {  

             e1.printStackTrace();  

         }  

         if (inStream != null) {  

             this.inStream = inStream;  

             DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();  

             try {  

                 DocumentBuilder domBuilder = domfac.newDocumentBuilder();  

                 Document doc = domBuilder.parse(inStream);  

                 root = doc.getDocumentElement();  

             } catch (ParserConfigurationException e) {  

                 e.printStackTrace();  

             } catch (SAXException e) {  

                 e.printStackTrace();  

             } catch (IOException e) {  

                 e.printStackTrace();  

             }  
         }  
     }  

     /** 
      *  
      * @param nodes 
      * @return 单个节点多个值以分号分隔 
      */  
     public Map<String, String> getValue(String[] nodes) {  

         if (inStream == null || root==null) {  
             return null;  
         }  
         Map<String, String> map = new HashMap<String, String>();  
         // 初始化每个节点的值为null  
         for (int i = ; i < nodes.length; i++) {  
             map.put(nodes[i], null);  
         }  
         // 遍历第一节点  
         NodeList topNodes = root.getChildNodes();  
         if (topNodes != null) {  
             for (int i = ; i < topNodes.getLength(); i++) {  
                 Node book = topNodes.item(i);  
                 if (book.getNodeType() == Node.ELEMENT_NODE) {  
                     for (int j = ; j < nodes.length; j++) {  
                         for (Node node = book.getFirstChild(); node != null; node = node.getNextSibling()) {  
                             if (node.getNodeType() == Node.ELEMENT_NODE) {  
                                 if (node.getNodeName().equals(nodes[j])) {  
                                     String val = node.getTextContent();  
                                     String temp = map.get(nodes[j]);  
                                     if (temp != null && !temp.equals("")) {  
                                         temp = temp + ";" + val;  
                                     } else {  
                                         temp = val;  
                                     }  
                                     map.put(nodes[j], temp);  
                                 }  
                             }  
                         }  
                     }  
                 }  
             }  
         }  
         return map;  
     }  
    /* public static void main(String[] args) throws UnsupportedEncodingException {  
         System.out.println("请输入您需要查询的地点:");
         Scanner input = new Scanner(System.in);
           String city = input.next();
           String city_url = URLEncoder.encode(city, "GBK");
           String link="http://php.weather.sina.com.cn/xml.php?city="+city_url+"&password=DJOYnieT8234jlsK&day=0";  

         URL url;  

         try {  

             url = new URL(link);  
             WeatherUtil parser = new WeatherUtil(url);  
             String[] nodes = {"city","status1","temperature1","status2","temperature2"};  
             Map<String, String> map = parser.getValue(nodes);  
             System.out.println(map.get(nodes[0])+" 今天白天："+map.get(nodes[1])+" 最高温度："+map.get(nodes[2])+"℃ 今天夜间："+map.get(nodes[3])+" 最低温度："+map.get(nodes[4])+"℃ ");  
         } catch (MalformedURLException e) {  
             e.printStackTrace();  
         }  

     }  */

}
           

controller中ajax方法
//天气预报(AJAX)
    @RequestMapping("weather")
    public void weather(HttpSession session,HttpServletResponse response) throws Exception{

        String city_url = URLEncoder.encode("昆山", "GBK");       //定义需要获取天气信息的城市和编码格式
        String link="http://php.weather.sina.com.cn/xml.php?city="+city_url+"&password=DJOYnieT8234jlsK&day=0";  //气象台接口地址

        URL url;  //声明地址对象

        try {  
            url = new URL(link);  //生成url
            WeatherUtil parser = new WeatherUtil(url);  //将url交给工具类处理返回天气信息
            String[] nodes = {"city","status1","temperature1","status2","temperature2"};  //定义一个接受天气信息的字符串数组
            Map<String, String> map = parser.getValue(nodes);                             //天气信息转换为Map对象
            String weather=map.get(nodes[])+" 今天白天："+map.get(nodes[])+" 最高温度："+map.get(nodes[])+"℃ 今天夜间："+map.get(nodes[])+" 最低温度："+map.get(nodes[])+"℃ "; //便利数据生成信息字符串
            //System.out.println(weather);  
            response.setCharacterEncoding("utf-8");  
            response.getWriter().println(weather);      //使用AJAX将天气信息返回
            session.setAttribute("weather", weather);   //防止丢失将天气信息同时放入session中

        } catch (MalformedURLException e) {  
            e.printStackTrace();  
        }  

    }
           

jsp

$(function(){

 $.ajax({
            url:'weather.htm',
            type:"post",
            async:false,          
            dataType:"text",  
            success:function(data){
            document.getElementById("weather").innerHTML=data;
            }

            });
        }
           

你可以在jsp页面中自己写个

然后直接访问页面