一、参考项目

Poi-tl 1.9.1
Jd-gui 1.6.6
poi 4.1.2

二、代码片段与可学习的地方

1.Poi-tl: com.deepoove.poi.data.PictureType

使用到了枚举类型来管理类型

  1. /**
  2.  * @author Sayi
  3.  * @see org.apache.poi.xwpf.usermodel.Document
  4.  */
  5. public enum PictureType {
  6.     /**
  7.      * Extended windows meta file
  8.      */
  9.     EMF(2),
  11.     /**
  12.      * Windows Meta File
  13.      */
  14.     WMF(3),
  16.     /**
  17.      * Mac PICT format
  18.      */
  19.     PICT(4),
  21.     /**
  22.      * JPEG format
  23.      */
  24.     JPEG(5),
  26.     /**
  27.      * PNG format
  28.      */
  29.     PNG(6),
  31.     /**
  32.      * Device independent bitmap
  33.      */
  34.     DIB(7),
  36.     /**
  37.      * GIF image format
  38.      */
  39.     GIF(8),
  41.     /**
  42.      * Tag Image File (.tiff)
  43.      */
  44.     TIFF(9),
  46.     /**
  47.      * Encapsulated Postscript (.eps)
  48.      */
  49.     EPS(10),
  51.     /**
  52.      * Windows Bitmap (.bmp)
  53.      */
  54.     BMP(11),
  56.     /**
  57.      * WordPerfect graphics (.wpg)
  58.      */
  59.     WPG(12);
  61.     private int type;
  63.     PictureType(int type) {
  64.         this.type = type;
  65.     }
  67.     public int type() {
  68.         return this.type;
  69.     }
  71.     public String format() {
  72.         return super.name().toLowerCase();
  73.     }
  75.     public static PictureType suggestFileType(String imgFile) {
  76.         PictureType format = null;
  78.         imgFile = imgFile.toLowerCase();
  79.         if (imgFile.endsWith(".emf"))
  80.             format = EMF;
  81.         else if (imgFile.endsWith(".wmf"))
  82.             format = WMF;
  83.         else if (imgFile.endsWith(".pict"))
  84.             format = PICT;
  85.         else if (imgFile.endsWith(".jpeg") || imgFile.endsWith(".jpg"))
  86.             format = JPEG;
  87.         else if (imgFile.endsWith(".png"))
  88.             format = PNG;
  89.         else if (imgFile.endsWith(".dib"))
  90.             format = DIB;
  91.         else if (imgFile.endsWith(".gif"))
  92.             format = GIF;
  93.         else if (imgFile.endsWith(".tiff"))
  94.             format = TIFF;
  95.         else if (imgFile.endsWith(".eps"))
  96.             format = EPS;
  97.         else if (imgFile.endsWith(".bmp"))
  98.             format = BMP;
  99.         else if (imgFile.endsWith(".wpg")) format = WPG;
  100.         else {
  101.             throw new IllegalArgumentException(
  102.                     "Unsupported picture: " + imgFile + ". Expected emf|wmf|pict|jpeg|png|dib|gif|tiff|eps|bmp|wpg");
  103.         }
  104.         return format;
  105.     }
  107. }