运行 JJWT Json 令牌的运行时或类错误 [英] Runtime or class error running JJWT Json Token

问题描述

我有一个小问题.我一直在尝试使用不同的库来生成 json 令牌，现在我正在使用 Stormpath 中的 JJWT.他们有很好的教程解释.但我的问题是，当我尝试在public static void main"方法中运行 String 方法时，出现运行时或类错误.在他们的官方网站上说，jackson 库必须比版本 2.8 更新.所以我下载了这样的库.

I have a little problem. I´ve been trying to use different libraries to produce a json token and now I'm using JJWT from Stormpath. They have tutorials well explained. But my problem is, when I try to run the String method in a "public static void main" method, I get a runtime or class error. In their official website says there is a requeriment that the jackson library must being newer than Version 2.8. So I downloaded such library.

这是我的源代码:

package org.comunidadIT.proyecto.accesoDatos;

import java.security.Key;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import io.jsonwebtoken.impl.crypto.MacProvider;

public class ValidarToken {

    public String token(){
        // We need a signing key, so we'll create one just for this example. Usually
        // the key would be read from your application configuration instead.
        Key key = MacProvider.generateKey();

        String compactJws = Jwts.builder()
          .setSubject("Joe")
          .signWith(SignatureAlgorithm.HS512, key)
          .compact();

        return compactJws;
    }

    public static void main(String args[]){

        ValidarToken t= new ValidarToken();
        System.out.println(t.token());
    }

}

控制台显示以下错误信息:

The console show following error message:

Exception in thread "main" java.lang.NoSuchFieldError: USE_DEFAULTS
at com.fasterxml.jackson.annotation.JsonInclude$Value.<clinit>(JsonInclude.java:204)
at com.fasterxml.jackson.databind.cfg.MapperConfig.<clinit>(MapperConfig.java:44)
at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:549)
at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:465)
at io.jsonwebtoken.impl.DefaultJwtBuilder.<clinit>(DefaultJwtBuilder.java:42)
at io.jsonwebtoken.Jwts.builder(Jwts.java:116)
at org.comunidadIT.proyecto.accesoDatos.ValidarToken.token(ValidarToken.java:16)
at org.comunidadIT.proyecto.accesoDatos.ValidarToken.main(ValidarToken.java:27)

来自 maven 依赖项的图像，其中 jackson 似乎没问题

来自控制台的带有错误的图像

如您所见，jackson 依赖项似乎没问题.

As you can see the jackson dependencies appears to be fine.

此外，我还在参考库的构建路径中添加了更多库，但它们位于 pom.xml 之外.

Also I aatached more libreries to the build-path on reference libraries, but they are outside from the pom.xml.

我做错了什么?

谢谢

推荐答案

我自己回答，所以也许有人会遇到同样的问题.

I answer myself so perhaps someone could have the same problem.

我已经遇到这个问题大约一个月了，直到我有机会删除位于我的项目中的一些旧库.

I've been with this problem about a month, until I got balls to delete some old libraries located in my project.

问题似乎是我使用 jackson 2.8.2 或更高版本声明了 Maven 依赖关系，并且在参考库"中我的库低于 1.9，当我从构建路径中删除时，问题就消失了.现在我可以看到字符串令牌了.

The problem appeared to be that I declared a Maven dependecy with jackson 2.8.2 or later and in the 'reference libraries' I had libraries lowers than 1.9, when I removed from my Build-Path the problem was gone. And now I can see the String Token.

这是解决问题的图片.

谢谢.

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