JAVA 将图片转换为Base64编码

 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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