Base64位图片上传和解密

- 日理万妓 2022-06-09 03:07 245阅读 0赞

/* * base64位图片加密 */
        public static String getImageStr(String imgFile) {
            InputStream inputStream = null;
            byte[] data = null;
            try {
                inputStream = new FileInputStream(imgFile);
                data = new byte[inputStream.available()];
                inputStream.read(data);
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            // 加密
            BASE64Encoder encoder = new BASE64Encoder();
            return encoder.encode(data);
        }
    
    
        /* * base64位图片解密 */
        public static boolean generateImage(String imgStr,String imgpath) { // 对字节数组字符串进行Base64解码并生成图片
            if (imgStr == null) // 图像数据为空
                return false;
            BASE64Decoder decoder = new BASE64Decoder();
            try {
                // Base64解码
                byte[] b = decoder.decodeBuffer(imgStr);
                for (int i = 0; i < b.length; ++i) {
                    if (b[i] < 0) {
       // 调整异常数据
                        b[i] += 256;
                    }
                }
                // 生成jpeg图片
                String imgFilePath = imgpath;// 新生成的图片
                OutputStream out = new FileOutputStream(imgFilePath);
                out.write(b);
                out.flush();
                out.close();
                return true;
            } catch (Exception e) {
                return false;
            }
        }
    
    
    
    //测试下
    public class Image {
        public static void main(String[] args) {
            String image = getImageStr("C:/Users/jt/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/forum/upload/555555555.jpeg") ;
            System.out.println(image);
            String s = "" ;
            generateImage(s, "路径");
        }