这是编码的字符串
YjRmYTJhMGEtYjI0ZC00ZjU4LTg2ZDktNTNiN2I2ODM4YjY3IzU1YjFjNGUzZTRiMGQ4OTUxMGM2YWEyNw
我想为此
生成UUID答案 0 :(得分:1)
您可以使用2个功能进行如下转换。 apache commons codec jar
有一些使用UUID
对Base64
进行编码和解码的方法。
链接下载apache commons编解码器jar:http://www.java2s.com/Code/JarDownload/apache-commons/apache-commons-codec-1.4.jar.zip
import java.nio.ByteBuffer;
import java.util.UUID;
import org.apache.commons.codec.binary.Base64;
public class Solution1 {
public static void main(String[] args) {
String uuid_str = "YjRmYTJhMGEtYjI0ZC00ZjU4LTg2ZDktNTNiN2I2ODM4YjY3IzU1YjFjNGUzZTRiMGQ4OTUxMGM2YWEyNw";
String uuid_as_64 = uuidFromBase64(uuid_str);
System.out.println("as base64: "+uuid_as_64);
System.out.println("as uuid: "+uuidFromBase64(uuid_as_64));
}
private static String uuidToBase64(String str) {
Base64 base64 = new Base64();
UUID uuid = UUID.fromString(str);
ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
bb.putLong(uuid.getMostSignificantBits());
bb.putLong(uuid.getLeastSignificantBits());
return base64.encodeBase64URLSafeString(bb.array());
}
private static String uuidFromBase64(String str) {
Base64 base64 = new Base64();
byte[] bytes = base64.decodeBase64(str);
ByteBuffer bb = ByteBuffer.wrap(bytes);
UUID uuid = new UUID(bb.getLong(), bb.getLong());
return uuid.toString();
}
}
<强>输出:强>
as base64:62346661-3261-3061-2d62-3234642d3466
as uuid:eb6df8eb-aeb5-fb7d-bad7-edf4eb5fb677
更多信息,您可以按照教程进行操作:
答案 1 :(得分:0)
上述base64字符串解码为ASCII字符串“ b4fa2a0a-b24d-4f58-86d9-53b7b6838b67#55b1c4e3e4b0d89510c6aa27”,因此:
import org.apache.commons.codec.binary.Base64;
public class Solution {
private static String uuidFromBase64(String str) {
Base64 base64 = new Base64();
byte[] bytes = base64.decodeBase64(str);
String s = new String(bytes);
String trimmed = s.split("#")[0];
return trimmed;
}
}