本文介绍了空从ImageIO.read(新ByteArrayInputStream进行(BS))返回;的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想转换的Base64 连接codeD字符串(从图片)的。这里是我如何做到这一点:首先,我转换成字符串,它是:
字符串str =

<$p$p><$c$c>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

是这样的:

 字节[]和imagestring = str.getBytes(UTF-8);

然后我想机器上的文件保存这样的:

 公共布尔uploadImage(字节[]和imagestring,字符串名称,字符串扩展名)
{
    BufferedImage的图像= NULL;
    字符串路径= EVENT_FOLDER +名字+。 +扩展;    尝试
    {
        图像= ImageIO.read(新ByteArrayInputStream的(和imagestring)); //空返回这里
        ImageIO.write(图像,扩展新的文件(路径));
    }
    赶上(IOException异常E)
    {
        e.printStackTrace();
        返回false;
    }

但我在这条线越来越空:图像= ImageIO.read(新ByteArrayInputStream的(和imagestring));

我做了什么错?


解决方案

You ignored the fact that the data is Base64-encoded, not UTF-8.

To convert the string to bytes to get the original data, you need to reverse that Base64 encoding, for example using this library.

byte[] imageData = Base64.decode(str);

这篇关于空从ImageIO.read(新ByteArrayInputStream进行(BS))返回;的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

10-11 13:47