java 编码加密

文件转化为base64

jdk8+即可

Java Encode file to Base64 string To match with other encoded string

https://stackoverflow.com/questions/37066216/java-encode-file-to-base64-string-to-match-with-other-encoded-string

import java.util.Base64;
import java.nio.file.Files;

private static String encodeFileToBase64(File file) {
    try {
        byte[] fileContent = Files.readAllBytes(file.toPath());
        return Base64.getEncoder().encodeToString(fileContent);
    } catch (IOException e) {
        throw new IllegalStateException("could not read file " + file, e);
    }
}