ssm项目实现用户登陆持久化(token)

        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.3.0</version>
        </dependency>

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.Claim;
import com.auth0.jwt.interfaces.DecodedJWT;
 
public class JWTUtils {
 
    /**
     * 公钥
     */
    private static String SECRET = "qiang";  //此处随便设置一个自己的加密符号
    public static String createToken(int id, String username,
                                      String type) throws Exception {
        // 签发时间
        Date iatDate = new Date();
 
        // 过期时间，7天时间
        Calendar nowTime = Calendar.getInstance();
        nowTime.add(Calendar.HOUR, 24 * 7);
        Date experiesDate = nowTime.getTime();
 
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("alg", "HS256");
        map.put("typ", "JWT");
        String token = JWT.create()
                .withHeader(map)
                .withClaim("id", id)
                .withClaim("username", username)
                .withClaim("type", type)
                .withExpiresAt(experiesDate) // 设置过期的日期
                .withIssuedAt(iatDate) // 签发时间
                .sign(Algorithm.HMAC256(SECRET)); // 加密
        return token;
    }
 
    /**
     * 解密
     */
 
    public static Map<String, Claim> verifyToken(String token) throws Exception {
        JWTVerifier verifier = JWT.require(Algorithm.HMAC256(SECRET)).build();
        DecodedJWT jwt = null;
        try {
            jwt = verifier.verify(token);  //核实token
        } catch (Exception e) {
            throw new Exception("登录过期");
        }
        return jwt.getClaims();  //返回的是解析完的token，是一个map，里面有id，username，type键值对
    }
}

        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>

import redis.clients.jedis.Jedis;
 
public class JedisUtils {
 
    private static Jedis jedis;
    //初始化
    private static void init() {
        jedis = new Jedis("localhost");
    }
    //在redis中设置键值对存储
    public static void setToken(String id, String token, int day) {
        int second = day * 60 * 60 * 24;
        JedisUtils.init();
        jedis.set(String.valueOf(id), token); //根据id存储token
        jedis.expire(String.valueOf(id), second);  //设置token持续时间
    }
 
    public static String getToken(String id) {
        JedisUtils.init();
        String token = jedis.get(String.valueOf(id));  //获取token
        return token;
    }
}