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