JAVA BASE64转图片并存放

    /**
	 *
	 * @param BASE64str bas64字符串
	 * @param path 存储地址
	 * @param ext 图片后缀
	 * @return 存储地址
	 */
	public String BASE64CodeToBeImage(String BASE64str,String path,String ext){
		File fileDir = new File(path);
		if (!fileDir.exists()) {
			fileDir.setWritable(true);
			fileDir.mkdirs();
		}
        //文件名称
		String uploadFileName = UUID.randomUUID().toString() + "."+ext;
		File targetFile = new File(path, uploadFileName);
		BASE64Decoder decoder = new BASE64Decoder();
		try(OutputStream out = new FileOutputStream(targetFile)){
			byte[] b = decoder.decodeBuffer(BASE64str);
			for (int i = 0; i <b.length ; i++) {
				if (b[i] <0) {
					b[i]+=256;
				}
			}
			out.write(b);
			out.flush();
			return  path+"/"+uploadFileName+"."+ext;
		}catch (Exception e){
			e.printStackTrace();
			return null;
		}
	}

要用的Jar在java的那个实用技巧里面。