Java Base64图片加密解密源码注解

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需要导入的包

import java.awt.image.BufferedImage;      
import java.io.ByteArrayInputStream;      
import java.io.ByteArrayOutputStream;      
import java.io.File;      
import java.io.IOException;      
import javax.imageio.ImageIO;      
import sun.misc.BASE64Decoder;      
import sun.misc.BASE64Encoder;     

参数介绍

  static BASE64Encoder encoder = new sun.misc.BASE64Encoder();   //加密
  static BASE64Decoder decoder = new sun.misc.BASE64Decoder();   //解密

主要方法

    private  static String getImageBinary(File f){      

        BufferedImage bi;      
        try {      
            bi = ImageIO.read(f);      
            ByteArrayOutputStream baos = new ByteArrayOutputStream();      
            ImageIO.write(bi, "jpg", baos);      
            byte[] bytes = baos.toByteArray();      

            return encoder.encodeBuffer(bytes).trim();      
        } catch (IOException e) {      
            e.printStackTrace();      
        }      
        return null;      
    }

---

  private   static File base64StringToImage(String base64String){      
         try {      
             byte[] bytes1 = decoder.decodeBuffer(base64String);      
             ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);      
             BufferedImage bi1 =ImageIO.read(bais);      
             File w2 = new File("D://ok.png");//可以是jpg,png,gif格式      
             ImageIO.write(bi1, "jpg", w2);//不管输出什么格式图片，此处不需改动      
             return w2;
         } catch (IOException e) {      
             e.printStackTrace();      
         }
        return null;      
     }    

测试

public static void main(String[] args) {      
    System.out.println(getImageBinary(new File("D://flyStar.jpg")));      

      base64StringToImage(getImageBinary(new File("D://flyStar.jpg")));     

}      

~~注释： 分别实现flyStar.jpg图片的加密解密