Java获取图片的宽高等信息

import zzvcom.netvideo.common.toolkit.exception.EvalException; 

import javax.imageio.ImageIO; 
import java.awt.image.BufferedImage; 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.util.HashMap; 
import java.util.Map; 

/** 
* 图片信息获取测试 
* 
* @author leizhimin 2009-6-30 16:03:05 
*/ 
public  class TestImg { 
         /** 
         * 计算图片尺寸大小等信息：w宽、h高、s大小。异常时返回null。 
         * 
         * @param imgpath 图片路径 
         * @return 图片信息map 
         */ 
         public  static Map<String, Long> getImgInfo(String imgpath) { 
                Map<String, Long> map =  new HashMap<String, Long>(3); 
                File imgfile =  new File(imgpath); 
                 try { 
                        FileInputStream fis =  new FileInputStream(imgfile); 
                        BufferedImage buff = ImageIO.read(imgfile); 
                        map.put( "w", buff.getWidth() * 1L); 
                        map.put( "h", buff.getHeight() * 1L); 
                        map.put( "s", imgfile.length()); 
                        fis.close(); 
                }  catch (FileNotFoundException e) { 
                        System.err.println( "所给的图片文件" + imgfile.getPath() +  "不存在！计算图片尺寸大小信息失败！"); 
                        map =  null; 
                }  catch (IOException e) { 
                        System.err.println( "计算图片" + imgfile.getPath() +  "尺寸大小信息失败！"); 
                        map =  null; 
                } 
                 return map; 
        } 


         public  static  void main(String[] args)  throws EvalException { 
                String p =  "c:\\111.jpg"; 
                Map<String, Long> m = getImgInfo(p); 
                 for (Map.Entry<String, Long> entry : m.entrySet()) { 
                        System.out.println(entry.getKey() +  " " + entry.getValue()); 
                } 
        } 
}

w 120 
s 8148 
h 90 

Process finished with exit code 0