Java 将图片转二进制再将二进制转成图片

1import java.awt.image.BufferedImage;   
2import java.io.ByteArrayInputStream;   
3import java.io.ByteArrayOutputStream;   
4import java.io.File;   
5import java.io.IOException;   
6  
7import javax.imageio.ImageIO;   
8  
9import sun.misc.BASE64Decoder;   
10import sun.misc.BASE64Encoder;   
11  
12public class TestImageBinary {   
13    static BASE64Encoder encoder = new sun.misc.BASE64Encoder();   
14    static BASE64Decoder decoder = new sun.misc.BASE64Decoder();   
15       
16    public static void main(String[] args) {   
17        System.out.println(getImageBinary());   
18           
19        base64StringToImage(getImageBinary());   
20    }   
21       
22    static String getImageBinary(){   
23        File f = new File("c://20090709442.jpg");          
24        BufferedImage bi;   
25        try {   
26            bi = ImageIO.read(f);   
27            ByteArrayOutputStream baos = new ByteArrayOutputStream();   
28            ImageIO.write(bi, "jpg", baos);   
29            byte[] bytes = baos.toByteArray();   
30               
31            return encoder.encodeBuffer(bytes).trim();   
32        } catch (IOException e) {   
33            e.printStackTrace();   
34        }   
35        return null;   
36    }   
37       
38    static void base64StringToImage(String base64String){   
39        try {   
40            byte[] bytes1 = decoder.decodeBuffer(base64String);   
41               
42            ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);   
43            BufferedImage bi1 =ImageIO.read(bais);   
44            File w2 = new File("c://QQ.bmp");//可以是jpg,png,gif格式   
45            ImageIO.write(bi1, "jpg", w2);//不管输出什么格式图片，此处不需改动   
46        } catch (IOException e) {   
47            e.printStackTrace();   
48        }   
49    }   
50  
51}