图像处理4_使用 metadata-extractor 修改图片名为拍摄时间

相关代码：

import java.io.File;

import com.drew.imaging.ImageMetadataReader;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.exif.ExifSubIFDDirectory;

public class TestFileTwo {
public static void main(String[] args) throws Exception{
changeFile(new File("E:\\test"));
}

static void changeFile(File file) throws Exception {
if (file.isFile()) {
Metadata metadata = ImageMetadataReader.readMetadata(file);
for (Directory directory : metadata.getDirectories()) {
if("ExifSubIFDDirectory".equalsIgnoreCase( directory.getClass().getSimpleName() )){
String time1 = directory.getString(ExifSubIFDDirectory.TAG_DATETIME_ORIGINAL);
String time2 = time1.replace( ':','-' );

String rootPath = file.getParent();
String filename = file.getName();
String substring = "";
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot >-1) && (dot < (filename.length() - 1))) {
substring = filename.substring(dot + 1);
}
}
File newFile = new File(rootPath + File.separator + time2 + "." + substring);
file.renameTo(newFile);
}
}
}
else {
File[] files = file.listFiles();
for (File filealone : files)
changeFile(filealone);
}
}
}

主要参考： http://blog.csdn.net/wang_zhenwei/article/details/71172975 http://blog.csdn.net/wang_zhenwei/article/details/60968265