jwt基本使用

        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.4.0</version>
        </dependency>

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;
import org.junit.jupiter.api.Test;

import java.util.Calendar;
import java.util.HashMap;

public class JwtText {
    @Test
   void jwttext(){
       HashMap<String,Object> map=new HashMap<>();
       Calendar instance=Calendar.getInstance();
       instance.add(Calendar.SECOND,300);

       String token= JWT.create()
               .withClaim("userid",21)
               .withClaim("username","iJun")
               .withExpiresAt(instance.getTime())
               .sign(Algorithm.HMAC256("学习java..."));
       System.out.println(token);
   }
   @Test
   void Yantext(){
       //验证对象
        JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256("学习java...")).build();
       DecodedJWT verify = jwtVerifier.verify("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2MTE1MDMzNjAsInVzZXJpZCI6MjEsInVzZXJuYW1lIjoiaUp1biJ9.Lw6oENQq7gXv1U_USMjj2zG_Z5Zhkd7CfKk7L4czXbo");
       System.out.println(verify.getClaim("userid").asInt());
       System.out.println(verify.getClaim("username").asString());
       System.out.println(verify.getExpiresAt());
   }
}