JWT工具类

所需要依赖

    io.jsonwebtoken
    jjwt
    0.7.0

代码

/**
 * Jwt工具类
 */
public class JwtUtils {

    public static final String SUBJECT = "xdclass";
    public static long EXPIRE = 1000 * 60 * 60 * 24 * 7;//过期时间 毫秒 一周
    public static final String APPSECRET = "xd666";//密钥

    /**
     * 生成jwt
     *
     * @param user
     * @return java.lang.String
     */
    public static String geneJsonWebToken(User user) {
        if (user == null || user.getId() == null || user.getName() == null || user.getHeadImg() == null) {
            return null;
        } else {
            String token = Jwts.builder().setSubject(SUBJECT).claim("id", user.getId())
                    .claim("name", user.getName())
                    .claim("img", user.getHeadImg())
                    .setIssuedAt(new Date())
                    .setExpiration(new Date(System.currentTimeMillis() + EXPIRE))
                    .signWith(SignatureAlgorithm.HS256, APPSECRET).compact();
            return token;
        }
    }

    /**
     * 校验token
     * @param token
     * @return io.jsonwebtoken.Claims
     */
    public static Claims checkToken(String token) {
        try {
            final Claims claims = Jwts.parser().setSigningKey(APPSECRET)
                    .parseClaimsJws(token).getBody();
            return claims;
        }catch (Exception e){
            return null;
        }
    }
}

测试

public class CommonTest {
    @Test
    public void TestGeneJwt() {
        User user = new User();
        user.setId(999);
        user.setHeadImg("XXXXXXXXXXXXXXX");
        user.setName("xxxxx");
        String token = JwtUtils.geneJsonWebToken(user);
        System.out.println(token);
    }

    @Test
    public void TestCheck() {
        String token = "1eyJhbGciOiJIUzI1XXXNzIiwiaWQiOjk5OSwibmFtZSI6IumCueWutuaIkCIsImltZyI6Ind3dy54ZGNsYXNzLm5ldCIsImlhdCI6MTU1Mzk1MjM0MiwiZXhwIjoxNTU0NTU3MTQyfQ.ahK-QaVmPBMBEcHqVwgs6K50X1s0jVLiygQs2qQGQFQ";
        Claims claims = JwtUtils.checkToken(token);
        if (claims != null) {
            String name = (String) claims.get("name");
            String img = (String) claims.get("img");
            int id = (Integer) claims.get("id");
            System.out.println(name);
            System.out.println(img);
            System.out.println(id);
        } else {
            System.out.println("解密失败非法token");
        }
    }
}