1     package base64StringToImage;
 2     import java.awt.image.BufferedImage;  
 3     import java.io.ByteArrayInputStream;  
 4     import java.io.ByteArrayOutputStream;  
 5     import java.io.File;  
 6     import java.io.IOException;  
 7     import javax.imageio.ImageIO;  
 8     import sun.misc.BASE64Decoder;  
 9     import sun.misc.BASE64Encoder;  
10       
11     public class TestImageBinary {  
12 
13         /**
14          *
15          *@param filePath 照片绝对路径
16          *@return String base64码字符串
17          *
18          **/
19         public String changeImagetoBase64String(String filePath){  
20             BASE64Encoder encoder = new BASE64Encoder();
21             String base64String = "";
22             File file = new File(filePath);         
23             BufferedImage buffer;  
24             try {  
25                 buffer = ImageIO.read(file);  
26                 ByteArrayOutputStream baos = new ByteArrayOutputStream();  
27                 ImageIO.write(buffer, "jpg", baos);  //第二个参数“jpg”不需要修改
28                 byte[] bytes = baos.toByteArray();  
29                 base64String = encoder.encodeBuffer(bytes).trim();  
30             } catch (IOException e) {  
31                 e.printStackTrace();  
32             }  
33             return base64String;  
34         }  
35         
36         /**
37          *
38          *@param base64String base64码字符串
39          *@param filePath 照片绝对路径
40          *
41          **/
42         public void changeBase64StringtoImage(String base64String, String filePath){  
43             BASE64Decoder decoder = new BASE64Decoder();  
44             try {  
45                 byte[] bytes = decoder.decodeBuffer(base64String);                
46                 ByteArrayInputStream bais = new ByteArrayInputStream(bytes);  
47                 BufferedImage buffer =ImageIO.read(bais);  
48                 File file = new File(filePath);         //jpg,png,gif等格式  
49                 ImageIO.write(buffer, "jpg", file);     //第二个参数“jpg”不需要修改  
50             } catch (IOException e) {  
51                 e.printStackTrace();  
52             }  
53         }  
54     }