讀取圖片信息（exif），使用com.drew.metadata.Metadata

原創

2020-02-20 13:40

import java.io.File;
import java.util.Iterator;
 
import com.drew.imaging.jpeg.JpegMetadataReader;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.Tag;
import com.drew.metadata.exif.ExifDirectory;
 
/**
 * 測試用於讀取圖片的EXIF信息
 */
public class ExifTester {
     public static void main(String[] args) throws Exception {
         File jpegFile = new File("C:/test.JPG");
         Metadata metadata = JpegMetadataReader.readMetadata(jpegFile);
         Directory exif = metadata.getDirectory(ExifDirectory.class);
         Iterator tags = exif.getTagIterator();
         while (tags.hasNext()) {
             Tag tag = (Tag)tags.next();
             System.out.println(tag);
         }
     }
}

運行結果：

[Exif] Make - OLYMPUS OPTICAL CO.,LTD
[Exif] Model - u10D,S300D,u300D
[Exif] Orientation - Top, left side (Horizontal / normal)
[Exif] X Resolution - 72 dots per inch
[Exif] Y Resolution - 72 dots per inch
[Exif] Resolution Unit - Inch
[Exif] Software - 22-1012                        
[Exif] Date/Time - 2012:13:12 12:37:12
[Exif] YCbCr Positioning - Datum point
[Exif] Exposure Time - 0.01 sec
[Exif] F-Number - F5.2
[Exif] Exposure Program - Program creative (slow program)
[Exif] ISO Speed Ratings - 80
[Exif] Exif Version - 2.20
[Exif] Date/Time Original - 2012:13:12 12:37:12
[Exif] Date/Time Digitized - 2012:13:12 12:37:12
[Exif] Components Configuration - YCbCr
[Exif] Exposure Bias Value - 0 EV
[Exif] Max Aperture Value - F3.1
[Exif] Metering Mode - Multi-segment
[Exif] Light Source - Unknown
[Exif] Flash - Flash did not fire, auto
[Exif] Focal Length - 17.4 mm
[Exif] User Comment - 
[Exif] FlashPix Version - 1.00
[Exif] Color Space - sRGB
[Exif] Exif Image Width - 1024 pixels
[Exif] Exif Image Height - 768 pixels
[Exif] File Source - Digital Still Camera (DSC)
[Exif] Windows XP Title - 風景
[Exif] Windows XP Author - 一路風塵
[Exif] Windows XP Keywords - 你是我的唯一
[Exif] Windows XP Subject - 第一張
[Exif] Custom Rendered - Normal process
[Exif] Exposure Mode - Auto exposure
[Exif] White Balance - Auto white balance
[Exif] Digital Zoom Ratio - 1
[Exif] Scene Capture Type - Landscape
[Exif] Gain Control - None
[Exif] Contrast - None
[Exif] Saturation - None
[Exif] Sharpness - None
[Exif] Unknown tag (0xc4a5) - 80 114 105 110 116 73 77 0 480 2 -10...
[Exif] Compression - JPEG (old-style)
[Exif] Thumbnail Offset - 2022 bytes
[Exif] Thumbnail Length - 5864 bytes
[Exif] Thumbnail Data - [5864 bytes of thumbnail data]

讀取某項信息

package test;

import java.io.File;
import java.util.Iterator;
 
import com.drew.imaging.jpeg.JpegMetadataReader;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.Tag;
import com.drew.metadata.exif.ExifDirectory;
 
/**
 * 測試用於讀取圖片的EXIF信息
 */
public class PicExif {
     public static void main(String[] args) throws Exception {
         File jpegFile = new File(
                          "C:/test.JPG");
         Metadata metadata = JpegMetadataReader.readMetadata(jpegFile);
         Directory exif = metadata.getDirectory(ExifDirectory.class);
         Iterator tags = exif.getTagIterator();

          if(exif.containsTag(ExifDirectory.TAG_WIN_AUTHOR)){
              System.out.println("Pic author is "+exif.getDescription(ExifDirectory.TAG_WIN_AUTHOR));      
         }
          if(exif.containsTag(ExifDirectory.TAG_WIN_TITLE)){
        	System.out.println("Pic title is "+exif.getDescription(ExifDirectory.TAG_WIN_TITLE));    
          }
          if(exif.containsTag(ExifDirectory.TAG_WIN_KEYWORDS)){
        System.out.println("Pic keyword is "+exif.getDescription(ExifDirectory.TAG_WIN_KEYWORDS));
         }
     }
}

API:http://www.drewnoakes.com/code/exif/javadoc/

官方地址：http://www.drewnoakes.com/code/exif/