我正在使用request.getParameter并获取以下值：
[
"data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAA0NDQ0ODQ4QEA4UFhMWFB4bGRkbHi0gIiAiIC1EKjIqKjIqRDxJOzc7STxsVUtLVWx9aWNpfZeHh5e+tb75+f8BDQ0NDQ4NDhAQDhQWExYUHhsZGRseLSAiICIgLUQqMioqMipEPEk7NztJPGxVS0tVbH1pY2l9l4eHl761vvn5///AABEIBJgHKAMBIgACEQEDEQH/xACAAAEBAAMBAQEAAAAAAAAAAAAAAQIDBQQGBxABAAICAQIGAgEEAwEAAwEBAAECAxEEEiEFExQxQVEVIjIjUmFxM0KBJDRigkNEAQEBAQEBAAAAAAAAAAAAAAAAAQIDBBEBAAIDAQACAwEBAQAAAAAAAAERAhITUQMhMUFhIjJC/9oADAMBAAIRAxEAPwDYxmWFrREPPbKwN1sjyXvNlm20RWrpj6WKx9NuliBSGaRDKATohl0x9KygE0MgGHTHyTWPpmmgSKx9M4WAGMxuEisNiAw6I+liumSTIBpNwnUDLpj6NMYsz3sFiGWkhQYTWGUVDcAaRdgGjULokGOmUGlBU1CgjHREMlATpUUYdMfSxCqBCLtAYzVOiIZMtAwZmlBhrZ0wy0AnTB2hlBMA1ztrmky9GgV5a8eN7lviIrHaGbXedR2Bj1E7lrx1tM7l6dAx6YNM9GgTSqCJqDUKKJpQBF0KDHR2hkxmAVJhQGOliqgIq6AY6NQyUGOhUBTSKBoUBDQoJpNM0BDTJAY6TTKCYBgy0ul0DDRpnpdAw0rLRoGBpnpNAxVdEQCiroGEwsQugAlQGOl0ugEVRARkAxUZAhpVUTQqghpQE0aUTvs3ICJG2cADLsTMAIwtLGIsA0yiJXQAsQAIEAC7UAXTZWsQAjZoBUAAf/2Q==",
"data:image/jpeg;base64,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"
]
如何将其转换为数组？
当我使用request.getParameterValues("jsondata");时，会得到这个值[Ljava.lang.String;@8892fd8，这是不期望的。
答案 0 :(得分：1)
jsondata的值为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。参见How to parse JSON in Java。
解析后，您应该具有两个值的String[]或List<String>。
两个值均以data:image/jpeg;base64,开头，后跟Base-64编码的二进制数据（JPEG图像）。
假设您具有Java 8或更高版本，请使用Base64类将其解码为byte[]。
您现在拥有2个JPEG图像，格式为2字节数组。