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Java获取Google天气预报实例代码(一)

2014-11-23 23:38:05 · 作者: · 浏览: 0
标签: Java 获取 Google 天气预报 实例 代码
  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));
  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