package com.drew.metadata;

import java.io.File;
import java.io.IOException;

import com.drew.imaging.ImageMetadataReader;
import com.drew.imaging.ImageProcessingException;

public class SampleUsage
{
   /**
    * 图片信息获取metadata元数据信息
    * @param fileName 需要解析的文件
    * @return
    */
    public ImgInfoBean parseImgInfo (String fileName)
    {
        File file = new File(fileName);
        ImgInfoBean imgInfoBean = null;
        try {
            Metadata metadata = ImageMetadataReader.readMetadata(file);
            imgInfoBean = printImageTags(file, metadata);
        } catch (ImageProcessingException e) {
            System.err.println("error 1a: " + e);
        } catch (IOException e) {
            System.err.println("error 1b: " + e);
        }
        return imgInfoBean;
    }

    /**
     * 读取metadata里面的信息
     * @param sourceFile 源文件
     * @param metadata metadata元数据信息
     * @return
     */
    private ImgInfoBean printImageTags(File sourceFile, Metadata metadata)
    {
        ImgInfoBean imgInfoBean = new ImgInfoBean ();
        imgInfoBean.setImgSize(sourceFile.getTotalSpace());
        imgInfoBean.setImgName(sourceFile.getName());
        for (Directory directory : metadata.getDirectories()) {
            for (Tag tag : directory.getTags()) {
            	String tagName = tag.getTagName();
            	String desc = tag.getDescription();
				if (tagName.equals("Image Height")) {
					//图片高度
					imgInfoBean.setImgHeight(desc);
				} else if (tagName.equals("Image Width")) {
					//图片宽度
					imgInfoBean.setImgWidth(desc);
				} else if (tagName.equals("Date/Time Original")) {
					//拍摄时间
					imgInfoBean.setDateTime(desc);
				} else if (tagName.equals("GPS Altitude")) {
					//海拔
					imgInfoBean.setAltitude(desc);
				} else if (tagName.equals("GPS Latitude")) {
					//纬度
					imgInfoBean.setLatitude(pointToLatlong(desc));
				} else if (tagName.equals("GPS Longitude")) {
					//经度
					imgInfoBean.setLongitude(pointToLatlong(desc));
				}
            }
            for (String error : directory.getErrors()){
            	System.err.println("ERROR: " + error);
            }
        }
        return imgInfoBean;
    }

    /**
     * 经纬度转换  度分秒转换
     * @param point 坐标点
     * @return
     */
    public String pointToLatlong (String point ) {
    	Double du = Double.parseDouble(point.substring(0, point.indexOf("°")).trim());
    	Double fen = Double.parseDouble(point.substring(point.indexOf("°")+1, point.indexOf("'")).trim());
    	Double miao = Double.parseDouble(point.substring(point.indexOf("'")+1, point.indexOf("\"")).trim());
    	Double duStr = du + fen / 60 + miao / 60 / 60 ;
    	return duStr.toString();
    }
   
    public static void main(String[] args)
    {
        ImgInfoBean imgInfoBean = new SampleUsage().parseImgInfo("C:\\DSC_4564.JPG");
        System.out.println(imgInfoBean.toString());
    }
}


//java/8723