问题描述
限时送ChatGPT账号..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 orgunidadIT.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)
pact();
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 orgunidadIT.proyecto.accesoDatos.ValidarToken.token(ValidarToken.java:16)
at orgunidadIT.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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