Question

我正在创建Image for base64转换的演示应用程序。一些图像正确转换base64。当图像大小为3.92Mb（4128 * 3096）并成功转换为base64并上传到服务器但未上传。在Base64字符串写入文件和文本文件大小为5.40Mb。

Code For Image Convet to base64

public String convertImage(File file)  {

    FileInputStream inputSteam = new FileInputStream(file);
    inputSteam.read(getBytesFromFile(file));

    return Base64.encodeToString(getBytesFromFile(file, Base64.DEFAULT);
}


public byte[] getBytesFromFile(File file) throws IOException {

    InputStream is = new FileInputStream(file);
    // Get the size of the file
    long length = file.length();

    // You cannot create an array using a long type.
    // It needs to be an int type.
    // Before converting to an int type, check
    // to ensure that file is not larger than Integer.MAX_VALUE.
    if (length > Integer.MAX_VALUE) {

        // File is too large
    }

    // Create the byte array to hold the data
    byte[] bytes = new byte[(int) length];

    // Read in the bytes
    int offset = 0;
    int numRead = 0;
    while (offset < bytes.length && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
        offset += numRead;
    }

    // Ensure all the bytes have been read in
    if (offset < bytes.length) {

        throw new IOException("Could not completely read file "+ file.getName());
    }

    // Close the input stream and return bytes
    is.close();
    return bytes;
}

如何处理此问题。或任何其他转换图像的方式;

Answer 1

如果您使用PHP作为服务器，您是否在PHP.ini中检查了上传文件的最大大小

Answer 2

base64字符串文件应该大于原始文件大小，因为base64编码在字符串中添加自己的字符以维护base64格式。这可能是因为文件大小比原始大小更大的问题。

图像到Base64转换问题

2 个答案: