Jwt样例

导入依赖

版本随意，开心就好

        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.10.3</version>
        </dependency>

简单代码

package code9xs.utils;
​
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;
import sun.misc.Cleaner;
​
import java.io.UnsupportedEncodingException;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
​
public class JwtUtil {
    static final String sign = "this is an jwt signature";
​
    public static String ctrateJwt(String username, String id){
        // 设置过期时间
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DATE, 7);
        // 设置 header
//        Map<String, String> header = new HashMap<>();
//        header.put("alg", "HS256");
//        header.put("typ", "JWT");
​
        // 生成令牌
        String token = JWT.create()
//                .withHeader()      // 设置 header
                .withClaim("username", username)    // 设置用户名  payload 自定义部分
                .withClaim("id", id)    // 设置id  payload 自定义部分
                .withExpiresAt(instance.getTime())  // 设置过期时间
                .sign(Algorithm.HMAC256(sign)); // 设置签名, 需要将签名使用HMAC256加密后传入
        System.out.println(token);
        return token;
    }
​
​
    public static Boolean verify(String token)  {
        // 加密签名
        Algorithm algorithm = Algorithm.HMAC256(sign);
        // 构建
        JWTVerifier verifier = JWT.require(algorithm).build();
        // 验证token
        DecodedJWT jwt = verifier.verify(token);
        String username = jwt.getClaim("username").asString();
        String id = jwt.getClaim("id").asString();
        System.out.println(String.format("this user is %s", username));
        System.out.println(String.format("this user's ID is %s", id));
        return true;
​
    }
​
​
    public static void main(String[] args) {
//        String token = ctrateJwt("su.haodong", "6407003302");
        verify("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6IjY0MDcwMDMzMDIiLCJleHAiOjE2NjEzNDk2NjYsInVzZXJuYW1lIjoic3UuaGFvZG9uZyJ9.aW_Nd9CXiTVLHBrK2XzNk670sPWh662qpa-v5VvEzV0");
    }
​
}
​

　　

 

 

20220817