Java取網絡圖片並縮小

Java取網絡圖片並縮小：

1. package action;
3. import java.awt.image.BufferedImage;
4. import java.io.DataInputStream;
5. import java.io.FileOutputStream;
6. import java.net.HttpURLConnection;
7. import java.net.URL;
9. import com.sun.image.codec.jpeg.JPEGCodec;
10. import com.sun.image.codec.jpeg.JPEGImageEncoder;
12. public class Getpic {
13. public Getpic() {
14. }
16. public static boolean saveUrlAs(String fileUrl, String savePath)/* fileUrl網絡資源地址 */
17. {
19. try {
20. /* 將網絡資源地址傳給,即賦值給url */
21. URL url = new URL(fileUrl);
23. /* 此為聯系獲得網絡資源的固定格式用法，以便後面的in變量獲得url截取網絡資源的輸入流 */
24. HttpURLConnection connection = (HttpURLConnection) url.openConnection();
25. DataInputStream in = new DataInputStream(connection.getInputStream());
27. BufferedImage src = javax.imageio.ImageIO.read(in);
28. int width = src.getWidth();
29. int height = src.getHeight();
31. // 邊長縮小為二分之一
32. BufferedImage tag = new BufferedImage(width / 2, height / 2, BufferedImage.TYPE_INT_RGB);
33. // 繪制縮小後的圖
34. tag.getGraphics().drawImage(src, 0, 0, width / 2, height / 2, null);
35. FileOutputStream out1 = new FileOutputStream(savePath);
36. JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out1);
37. encoder.encode(tag);
38. out1.close();
41. return true;/* 網絡資源截取並存儲本地成功返回true */
43. } catch (Exception e) {
44. System.out.println(e + fileUrl + savePath);
45. return false;
46. }
47. }
49. public static void main(String[] args) {
50. Getpic pic = new Getpic();/* 創建實例 */
52. //需要下載的URL
53. String photoUrl = "http://hiphotos.baidu.com/yanshennan/pic/item/03a505c8bcbaf6557f3e6f8a.jpg";
55. // 截取最後/後的字符串
56. String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));
58. //圖片保存路徑
59. String filePath = "E:";
61. /* 調用函數，並且進行傳參 */
62. boolean flag = pic.saveUrlAs(photoUrl, filePath + fileName);
64. System.out.println("Run ok!\n Get URL file " + flag);
65. System.out.println(filePath);
66. System.out.println(fileName);
67. }
69. }