将Base64字符串转换为字符串数组
我正在使用request.getParameter并获取此值：
[ "data:image/jpeg;base64,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", "data:image/jpeg;base64,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" ] 如何将其转换为数组？
虽然当我使用时，request.getParameterValues("jsondata");我得到这个值 [Ljava.lang.String;@8892fd8，这不是我想要的。如何转换为数组？
写回答
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该jsondata值是JSON文本。它以＃开头[，这意味着它是一个JSON数组。
要处理它，您应该使用JSON解析器。请参见如何在Java中解析JSON。
一旦你解析它，你应该有一个String[]或一个List ，有2个值。
两个值都data:image/jpeg;base64,以Base-64编码的二进制数据（JPEG图像）开始。
假设你有Java 8或更高版本，请使用Base64该类将其解码为a byte[]。
您现在拥有2个JPEG图像，采用2字节数组的形式。
2019-08-17 14:52:42赞同 展开评论 打赏
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