java读取图片的(尺寸、拍摄日期、标记)等EXIF信息

1.metadata-extractor是 处理图片EXIF信息的开源项目，最新代码及下载地址：https://github.com/drewnoakes/metadata-extractor

2.本demo工程的代码（包含所需的jar包）下载地址：http://files.cnblogs.com/files/haha12/readPic.rar

主要代码如下：

package com.test;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;

import com.drew.imaging.jpeg.JpegMetadataReader;
import com.drew.imaging.jpeg.JpegProcessingException;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.Tag;

public class ReadPic {

    /**
     * 导入标签，使用metadata-extractor
     *
     * @param args
     */
    public static void main(String[] args) {
        readPic();
    }

    /**
     * 处理 单张 图片
     *
     * @return void
     * @date 2015-7-25 下午7:30:47
     */
    private static void readPic() {
        File jpegFile = new File("d:\\002.jpg");
        Metadata metadata;
        try {
            metadata = JpegMetadataReader.readMetadata(jpegFile);
            Iterator<Directory> it = metadata.getDirectories().iterator();
            while (it.hasNext()) {
                Directory exif = it.next();
                Iterator<Tag> tags = exif.getTags().iterator();
                while (tags.hasNext()) {
                    Tag tag = (Tag) tags.next();
                    System.out.println(tag);

                }

            }
        } catch (JpegProcessingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

控制台打印信息如下：

[Exif IFD0] Software - Picasa
[Exif IFD0] Date/Time - 2015:02:15 12:09:22
[Exif IFD0] Windows XP Keywords - 白色;蓝色;颜色白
[Exif IFD0] Padding - [2060 bytes]
[Xmp] XMP Value Count - 13
[Xmp] Subject - 白色 蓝色 颜色白
[JFIF] Version - 1.1
[JFIF] Resolution Units - inch
[JFIF] X Resolution - 96 dots
[JFIF] Y Resolution - 96 dots
[File] File Name - 002.jpg
[File] File Size - 51798 bytes
[File] File Modified Date - Mon Jul 27 09:55:42 CST 2015
[IPTC] Enveloped Record Version - 4
[IPTC] Coded Character Set - UTF-8
[IPTC] Application Record Version - 4
[IPTC] Keywords - 白色;蓝色;颜色白
[Photoshop] Caption Digest - -68 -113 27 105 -101 114 34 -54 -56 20 16 108 64 37 -42 -58
[Exif SubIFD] Exif Version - 2.20
[Exif SubIFD] Unique Image ID - f9b137287bef9686897c8a258ffd089b
[Exif SubIFD] Padding - [2060 bytes]
[JPEG] Compression Type - Baseline
[JPEG] Data Precision - 8 bits
[JPEG] Image Height - 870 pixels
[JPEG] Image Width - 580 pixels
[JPEG] Number of Components - 3
[JPEG] Component 1 - Y component: Quantization table 0, Sampling factors 2 horiz/2 vert
[JPEG] Component 2 - Cb component: Quantization table 1, Sampling factors 1 horiz/1 vert
[JPEG] Component 3 - Cr component: Quantization table 1, Sampling factors 1 horiz/1 vert