您现在的位置： > 首页 > 程序开发 > Java教程
>> 最新教程
>> 热门教程
>> 最新游戏资讯
>> 热门游戏资讯
>> Java教程
Java获取Google天气预报实例代码
作者:                来自:安迪教程网                 加入时间:10-09-17                进入论坛讨论
  1. /**
  2.  * 一个利用Java获取Google天气预报的例子
  3.  */
  4. import java.awt.BorderLayout;
  5. import java.awt.Color;
  6. import java.awt.GridLayout;
  7. import java.awt.event.ActionEvent;
  8. import java.awt.event.ActionListener;
  9. import java.awt.event.KeyAdapter;
  10. import java.awt.event.KeyEvent;
  11. import java.io.*;
  12. import java.net.MalformedURLException;
  13. import java.net.URL;
  15. import org.w3c.dom.*;
  17. import javax.swing.BorderFactory;
  18. import javax.swing.JButton;
  19. import javax.swing.JFrame;
  20. import javax.swing.JPanel;
  21. import javax.swing.JScrollPane;
  22. import javax.swing.JTextArea;
  23. import javax.swing.JTextField;
  24. import javax.xml.parsers.*;
  26. public class GoogleReport extends JFrame implements ActionListener {
  27.     JPanel p1 = new JPanel();
  28.     JTextField tf = new JTextField(2);
  30.     JButton but = new JButton("查询");
  31.     JPanel p2 = new JPanel();
  32.     JTextArea ta = new JTextArea(10, 40);
  34.     public GoogleReport() {
  35.         super("天气预报查询");
  36.         // 设置p1面板
  38.         p1.setLayout(new BorderLayout());
  39.         tf.addKeyListener(new TfListener());// 设置tf监听器
  41.         tf.setBorder(BorderFactory.createLineBorder(Color.blue, 1));
  42.        
  43.         p1.add(tf, BorderLayout.CENTER);
  44.         but.setBorder(BorderFactory.createLineBorder(Color.green));// 设置按钮边框颜色
  46.         // 增加but事件监听器
  48.         but.addActionListener(this);
  49.         p1.add(but, BorderLayout.EAST);
  50.         add(p1, BorderLayout.NORTH);
  51.         // 设置p2面板
  53.         p2.setLayout(new GridLayout(1, 1));
  55.         JScrollPane sp = new JScrollPane(ta);
  56.         ta.setEnabled(false);
  57.         ta.setBorder(BorderFactory.createLineBorder(Color.red, 2));
  58.         p2.add(sp);
  59.         add(p2, BorderLayout.CENTER);
  61.         this.setSize(500, 400);
  62.         this.setLocationRelativeTo(null);
  63.         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  64.         this.setVisible(true);
  65.     }
  67.     public static void main(String[] args) {
  68.         new GoogleReport();
  69.     }
  71.     /**
  72.      * getWeather->由city值获得天气情况
  73.      *
  74.      * @param city
  75.      * @return 获得的天气情况的字符串
  76.      */
  77.     public String getWeather(String city) {
  79.         try {
  80.             URL ur = new URL("http://www.google.com/ig/api?hl=zh_cn&weather="
  81.                     city);
  82.             InputStream instr = ur.openStream();
  83.             String s;
  84.             String str;
  85.             BufferedReader in = new BufferedReader(new InputStreamReader(instr));
  86.             StringBuffer sb = new StringBuffer();
  88.             Writer out = new BufferedWriter(new OutputStreamWriter(
  89.                     new FileOutputStream("weather.txt"), "utf-8"));
  90.             while ((s = in.readLine()) != null) {
  91.                 sb.append(s);
  92.             }
  93.             str = new String(sb);
  94.             out.write(str);
  95.             out.close();
  96.             in.close();
  98.         } catch (MalformedURLException e) {
  99.             e.printStackTrace();
  100.         } catch (IOException e) {
  101.             e.printStackTrace();
  102.         }
  103.         File f = new File("weather.txt");
  104.         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  105.         String str = null;
  106.         try {
  107.             DocumentBuilder builder = factory.newDocumentBuilder();
  108.             Document doc = builder.parse(f);
  109.             NodeList nl = (NodeList) doc
  110.                     .getElementsByTagName("forecast_conditions");// 获得XML文档的forecast_conditions元素
  112.             NodeList n2 = nl.item(0).getChildNodes();// 获得第一个forecast_condition的全部子节点
  115.             str = "今天是"
  116.                     n2.item(0).getAttributes().item(0).getNodeValue()
  117.                     ","
  118.                     n2.item(4).getAttributes().item(0).getNodeValue()
  119.                     ","// 获得n2的第五个元素current_conditions
  121.                     "最低气温"
  122.                     n2.item(1).getAttributes().item(0).getNodeValue()
  123.                     "℃,"// 获得n2的第二个元素low
  125.                     "最高气温"
  126.                     n2.item(2).getAttributes().item(0).getNodeValue() "℃";// 获得n2的第二个元素hight
  128.         } catch (Exception e) {
  129.         }
  130.         return str;
  131.     }
  133.     private class TfListener extends KeyAdapter {
  134.         public void keyPressed(KeyEvent e) {
  135.             if (e.getKeyCode() == KeyEvent.VK_ENTER) {
  136.                 String s = tf.getText();
  137.                 tf.setText("");
  138.                 String ss = getWeather(s);
  139.                 // ta.setBorder(BorderFactory.createLineBorder(Color.RED,1));
  141.                 ta.append(ss " ");
  142.             }
  143.         }
  144.     }
  146.     @Override
  147.     public void actionPerformed(ActionEvent e) {
  148.         if (e.getSource() == but) {
  149.             String s = tf.getText();
  150.             tf.setText("");
  151.             String ss = getWeather(s);
  152.             ta.append(ss " ");
  153.         }
  154.     }
  156. }
相关教程
联系方式：QQ:6084884 email:agwcn@126.com 粤ICP备10101711号
本网站中发布的文章只代表发表人的个人观点，不代表安迪教程网网站的立场
copyright© 2000-2004 安迪教程网 All rights reserved agwcn.com