Java image scaling and cutting:

Java image scaling and cutting:

1. PackageAction;
3. ImportJava. AWT. graphics;
4. ImportJava. AWT. image;
5. ImportJava. AWT. toolkit;
6. ImportJava. AWT. image. bufferedimage;
7. ImportJava. AWT. image. cropimagefilter;
8. ImportJava. AWT. image. filteredimagesource;
9. ImportJava. AWT. image. imagefilter;
10. ImportJava. Io. file;
11. ImportJava. Io. fileoutputstream;
12. ImportJava. Io. ioexception;
14. ImportJavax. ImageIO. ImageIO;
16. ImportCom.sun.image.codec.jpeg. Unzip codec;
17. ImportCom.sun.image.codec.jpeg. Specify imageencoder;
19. Public ClassImageprocess {
21. /**
22. * Scale the image
23. *
24. * @ Param srcimgfilename
25. * @ Throws ioexception
26. */
27. Public VoidZoomimage (string srcimgfilename)ThrowsIoexception
    {
28. // Read the file
29. File _ file =NewFile (srcimgfilename );
30. // Construct an image object
31. Bufferedimage src = javax. ImageIO. ImageIO. Read (_ file );
32. IntWidth = SRC. getwidth ();
33. IntHeight = SRC. getheight ();
35. // The length of the side is reduced to 1/2.
36. Bufferedimage tag =NewBufferedimage (width/2, height/2,
    Bufferedimage. type_int_rgb );
37. // Draw the reduced Graph
38. Tag. getgraphics (). drawimage (SRC, 0, 0, width/2,
    Height/2,Null);
39. Fileoutputstream out =NewFileoutputstream ("D: \ test1 \ targetIMG1-4.jpg ");
40. Required imageencoder encoder = required codec. createjpegencoder (out );
41. Encoder. encode (TAG );
42. Out. Close ();
44. // The side length is doubled.
45. Tag =NewBufferedimage (width * 2, height * 2,
    Bufferedimage. type_int_rgb );
46. Tag. getgraphics (). drawimage (SRC, 0, 0, width * 2,
    Height * 2,Null);
47. Out =NewFileoutputstream ("D: \ test1 \ targetimgx2.jpg ");
48. Encoder = export codec. createjpegencoder (out );
49. Encoder. encode (TAG );
50. Out. Close ();
52. }
54. /**
55. * Divide an image into nine parts.
56. *
57. * @ Param srcimagefile
58. * @ Throws ioexception
59. */
60. Public VoidCut (string srcimagefile)ThrowsIoexception
    {
61. Image IMG;
62. Imagefilter cropfilter;
63. String dir =Null;
64. // Read the source Image
65. Bufferedimage src = ImageIO. Read (NewFile (srcimagefile ));
66. IntDestwidth = SRC. getwidth ()/3;
67. IntDestheight = SRC. getheight ()/3;
68. // Loop
69. For(IntI = 0;
    I <3; I ++ ){
70. For(IntJ = 0;
    J <3; j ++ ){
71. // The four parameters are the coordinates of the image start point and width and height.
72. Cropfilter =NewCropimagefilter (J * destwidth, I * destheight, destwidth, destheight );
73. IMG = toolkit. getdefatooltoolkit (). createimage (NewFilteredimagesource (SRC. getsource (), cropfilter ));
74. Bufferedimage tag =NewBufferedimage (destwidth, destheight, bufferedimage. type_int_rgb );
75. Graphics G = tag. getgraphics ();
76. G. drawimage (IMG, 0, 0,Null);//
    Draw a thumbnail
77. G. Dispose ();
78. // Output as a file
79. Dir = "D: \ test1 \ cut_image _" + I + "_" + J + ". jpg ";
80. File F =NewFile (DIR );
81. ImageIO. Write (TAG, "Jpeg", F );
82. }
83. }
84. }
86. Public Static VoidMain (string []
    ARGs)ThrowsIoexception {
87. String imgfilename = "D: \ test \ test.png ";
88. Imageprocess izoom =NewImageprocess ();
90. Izoom. zoomimage (imgfilename );
91. Izoom. Cut (imgfilename );
92. }
93. }