如何使用Apache Commons Codec在Java中解码JWT(标头和正文)? [英] How to decode JWT (Header and Body) in java using Apache Commons Codec?

问题描述

我正在寻找使用Apache Commons Codec解码以下JWT的方法.我们该怎么做?

I am looking decode the following JWT using Apache Commons Codec. How we can do that ?

    eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0Iiwicm9sZXMiOiJST0xFX0FETUlOIiwiaXNzIjoibXlzZ
WxmIiwiZXhwIjoxNDcxMDg2MzgxfQ.1EI2haSz9aMsHjFUXNVz2Z4mtC0nMdZo6bo3-x-aRpw

这应该检索Header，Body和Signature部分.代码是什么?

This should retrieve Header, Body and Signature part. Whats the code ?

推荐答案

在这里:

import org.apache.commons.codec.binary.Base64;
@Test
    public void testDecodeJWT(){
        String jwtToken = "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0Iiwicm9sZXMiOiJST0xFX0FETUlOIiwiaXNzIjoibXlzZWxmIiwiZXhwIjoxNDcxMDg2MzgxfQ.1EI2haSz9aMsHjFUXNVz2Z4mtC0nMdZo6bo3-x-aRpw";
        System.out.println("------------ Decode JWT ------------");
        String[] split_string = jwtToken.split("\\.");
        String base64EncodedHeader = split_string[0];
        String base64EncodedBody = split_string[1];
        String base64EncodedSignature = split_string[2];

        System.out.println("~~~~~~~~~ JWT Header ~~~~~~~");
        Base64 base64Url = new Base64(true);
        String header = new String(base64Url.decode(base64EncodedHeader));
        System.out.println("JWT Header : " + header);


        System.out.println("~~~~~~~~~ JWT Body ~~~~~~~");
        String body = new String(base64Url.decode(base64EncodedBody));
        System.out.println("JWT Body : "+body);        
    }

以下输出:

------------ Decode JWT ------------
~~~~~~~~~ JWT Header ~~~~~~~
JWT Header : {"alg":"HS256"}
~~~~~~~~~ JWT Body ~~~~~~~
JWT Body : {"sub":"test","roles":"ROLE_ADMIN","iss":"myself","exp":1471086381}

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