如何使用Apache Commons Codec解码java中的JWT (Header和Body)？

import org.apache.commons.codec.binary.Base64;
import org.json.JSONObject;

public class JWTDecoder {
    public static void main(String[] args) {
        String jwt = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c";

        // 拆分JWT字符串
        String[] jwtParts = jwt.split("\\.");
        String headerBase64 = jwtParts[0];
        String payloadBase64 = jwtParts[1];

        // Base64解码Header和Payload
        byte[] headerBytes = Base64.decodeBase64(headerBase64);
        byte[] payloadBytes = Base64.decodeBase64(payloadBase64);

        // 解码JSON
        String headerJson = new String(headerBytes);
        String payloadJson = new String(payloadBytes);

        JSONObject headerObj = new JSONObject(headerJson);
        JSONObject payloadObj = new JSONObject(payloadJson);

        // 输出解码后的Header和Payload
        System.out.println("Decoded Header: " + headerObj.toString());
        System.out.println("Decoded Payload: " + payloadObj.toString());
    }
}