JWTUtils--SpringBoot整合JWT

        <!--引入JWT依赖-->
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.4.0</version>
        </dependency>

public class JWTUtils {

    //秘钥 盐
    private static final String SECRET = "SmyC47re$ML%F72x6koqyUQ0XLQOasdsad";

    /**
     * 生成token header.payload.sing
     * @param map
     * @param expired
     * @return
     */
    public static String getToken(Map<String,String> map, Integer expired){
        Calendar instance = Calendar.getInstance();
        //设置过期时间单位:秒
        instance.add(Calendar.SECOND,expired);
        //创建jwt builder
        JWTCreator.Builder builder = JWT.create();
        //payload
        map.forEach((k,v)->{
            builder.withClaim(k,v);
        });
        //制定令牌过期时间
        String token = builder.withExpiresAt(instance.getTime())
                //sign
                .sign(Algorithm.HMAC256(SECRET));
        return token;
    }

    /**
     * 验证token 合法性 || 获取token信息方法
     * @param token
     */
    public static DecodedJWT verify(String token){
        return JWT.require(Algorithm.HMAC256(SECRET)).build().verify(token);
    }

    public static void main(String[] args) {
        Map<String,String> map = new HashMap<>();
        map.put("userId","1");
        map.put("loginName","admin");
        String token = getToken(map,60);
        System.out.println(token);

        DecodedJWT tokenInfo = verify("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJsb2dpbk5hbWUiOiJhZG1pbiIsImV4cCI6MTU5NzE5ODI1MywidXNlcklkIjoiMSJ9.jTcL_PFAbn_AT05alHGv3kzEI_vsAf5RiCDJEqLH30A");
        String userId = tokenInfo.getClaim("userId").asString();
        String loginName = tokenInfo.getClaim("loginName").asString();

        System.out.println(userId);
        System.out.println(loginName);
    }
}