JAVA 将图片转换为Base64编码详解编程语言

 1 import java.io.FileInputStream; 
 2 import java.io.FileOutputStream; 
 3 import java.io.IOException; 
 4 import java.io.InputStream; 
 5 import java.io.OutputStream; 
 6  
 7 import org.apache.commons.codec.binary.Base64; 
 8  
 9  
10 /** 
11  * 将图片转换为Base64<br> 
12  * 将base64编码字符串解码成img图片 
13  * @创建时间 2015-06-01 15:50 
14  * 
15  */ 
16 public class Img2Base64Util { 
17  
18     public static void main(String[] args) { 
19         String imgFile = "d://3.jpg";//待处理的图片 
20         String imgbese=getImgStr(imgFile); 
21         System.out.println(imgbese.length()); 
22         System.out.println(imgbese); 
23         String imgFilePath = "d://332.jpg";//新生成的图片 
24         generateImage(imgbese,imgFilePath); 
25     } 
26     /** 
27      * 将图片转换成Base64编码 
28      * @param imgFile 待处理图片 
29      * @return 
30      */ 
31     public static String getImgStr(String imgFile){ 
32         //将图片文件转化为字节数组字符串，并对其进行Base64编码处理 
33    
34          
35         InputStream in = null; 
36         byte[] data = null; 
37         //读取图片字节数组 
38         try  
39         { 
40             in = new FileInputStream(imgFile);         
41             data = new byte[in.available()]; 
42             in.read(data); 
43             in.close(); 
44         }  
45         catch (IOException e)  
46         { 
47             e.printStackTrace(); 
48         } 
49         return new String(Base64.encodeBase64(data)); 
50     } 
51      
52     /** 
53      * 对字节数组字符串进行Base64解码并生成图片 
54      * @param imgStr 图片数据 
55      * @param imgFilePath 保存图片全路径地址 
56      * @return 
57      */ 
58     public static boolean generateImage(String imgStr,String imgFilePath){ 
59         // 
60         if (imgStr == null) //图像数据为空 
61             return false; 
62       
63         try  
64         { 
65             //Base64解码 
66             byte[] b = Base64.decodeBase64(imgStr); 
67             for(int i=0;i<b.length;++i) 
68             { 
69                 if(b[i]<0) 
70                 {//调整异常数据 
71                     b[i]+=256; 
72                 } 
73             } 
74             //生成jpeg图片 
75  
76             OutputStream out = new FileOutputStream(imgFilePath);     
77             out.write(b); 
78             out.flush(); 
79             out.close(); 
80             return true; 
81         }  
82         catch (Exception e)  
83         { 
84             return false; 
85         } 
86     } 
87 }

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