springboot中TokenUtils代码和redis登录

原创
UG666
2023-02-22
代码CV笔记
229
0 
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Date;

public class JwtTokenUtils {

    public static final String TOKEN_HEADER = "TOKEN";
    /**
     * 密钥key
     */
    private static final String SECRET = "ug666ug666ug666";

    /**
     * JWT的发行人
     */
    private static final String ISS = "ug666";

    /**
     * 自定义用户信息
     */
    private static final String ROLE_CLAIMS = "rol";

    /**
     * 过期时间是3600秒，既是1个小时
     */
    public static final long EXPIRATION = 3600L * 1000;

    /**
     * 选择了记住我之后的过期时间为7天
     */
    public static final long EXPIRATION_REMEMBER = 604800L * 1000;


    public static String createToken(User user)  {
        return Jwts.builder().signWith(SignatureAlgorithm.HS512, SECRET) // 加密算法
                .setIssuer(ISS) // jwt发行人
                .claim("userId", user.getId())
                .setSubject(user.getUsername()) // jwt面向的用户
                .setIssuedAt(new Date()) // jwt发行人
                .setExpiration(new Date(System.currentTimeMillis() + EXPIRATION)) // token过期时间
                .compact();
    }

    /**
     * 从token获取用户名
     * @param token
     * @return
     */
    public static String getUsername(String token)  {
        return getTokenBody(token).getSubject();
    }

    public static int getUserId(String token)  {
        return (int)getTokenBody(token).get("userId");
    }
    /**
     * 是否已过期
     *
     * @param token
     * @return
     */
    public static boolean isExpiration(String token)  {
        return getTokenBody(token).getExpiration().before(new Date());
    }

    private static Claims getTokenBody(String token)  {
        return Jwts.parser().setSigningKey(SECRET).parseClaimsJws(token).getBody();
    }

    /**
     * 验证token
     *
     * @param token
     * @return
     */
    public static boolean validateToken(String token)  {
        return isExpiration(token) == false;
    }


    public static void main(String[] args) {
        User user = new User();
        user.setId(2);
        user.setUsername("asd");

        String token = JwtTokenUtils.createToken(user);
        System.out.println(token);
        System.out.println(JwtTokenUtils.getUsername("eyJhbGciOiJIUzUxMiJ9.eyJpc3MiOiJ1ZzY2NiIsInVzZXJJZCI6Miwic3ViIjoiYXNkIiwiaWF0IjoxNjcyOTE2NzM0LCJleHAiOjE2NzI5MjAzMzR9.gTPE0PgoXMOP7y53diapMqItIBMKyhXStMOP3RJ1fseOagFKMFzVcAroSaUGMcHT4hGWYHcZDYcT7yDCRlKkOg"));
        System.out.println(JwtTokenUtils.getUserId("eyJhbGciOiJIUzUxMiJ9.eyJpc3MiOiJ1ZzY2NiIsInVzZXJJZCI6Miwic3ViIjoiYXNkIiwiaWF0IjoxNjcyOTE2NzM0LCJleHAiOjE2NzI5MjAzMzR9.gTPE0PgoXMOP7y53diapMqItIBMKyhXStMOP3RJ1fseOagFKMFzVcAroSaUGMcHT4hGWYHcZDYcT7yDCRlKkOg"));
        System.out.println(JwtTokenUtils.validateToken("eyJhbGciOiJIUzUxMiJ9.eyJpc3MiOiJ1ZzY2NiIsInVzZXJJZCI6Miwic3ViIjoiYXNkIiwiaWF0IjoxNjcyOTE2NzM0LCJleHAiOjE2NzI5MjAzMzR9.gTPE0PgoXMOP7y53diapMqItIBMKyhXStMOP3RJ1fseOagFKMFzVcAroSaUGMcHT4hGWYHcZDYcT7yDCRlKkOg"));
    }

}

需要导入maven依赖

<dependency>
	<groupId>io.jsonwebtoken</groupId>
	<artifactId>jjwt</artifactId>
	<version>0.9.0</version>
</dependency>

另外一个版本的TokenUtils工具类

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

//JWT Token工具类
@Component
public class TokenUtils {
    //用户名key
    private static final String CLAIM_KEY_USERNAME = "username";
    //生成时间key
    private static final String CLAIM_KEY_CREATED = "created";
    //密钥
    private String secret = "1234";
    //失效时间
    private Long expiration = 3600L * 1000;

    //根据用户信息生成token
    public String generateToken(User user){
        Map<String,Object> claims = new HashMap<>();
        claims.put(CLAIM_KEY_USERNAME,user.getUsername());
        claims.put(CLAIM_KEY_CREATED,new Date());
        return generateToken(claims);

    }

    //根据荷载生成JWT Token
    private String generateToken(Map<String,Object> claims){
        return Jwts.builder()
                .setClaims(claims)
                //过期时间
                .setExpiration(generateExpirationDate())
                //secret:盐值
                .signWith(SignatureAlgorithm.HS512,secret)
                .compact();
    }

    //生成token失效时间
    private Date generateExpirationDate() {
        return new Date(System.currentTimeMillis() + expiration*1000);
    }

    //从token中获取用户名
    public String getUsernameFromToken(String token){
        String username;
        try{
            Claims claims = getClaimsFormToken(token);
            username = claims.getSubject();
        }catch (Exception e){
            username = null;
        }
        return username;
    }

    //从jwt中获荷载
    private Claims getClaimsFormToken(String token) {
        Claims claims = null;
        try {
            claims = Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();
        }catch (Exception e){
            e.printStackTrace();
        }
        return claims;
    }

    //判断token是否有效
    public boolean validateToken(String token,User user){
        String username = getUsernameFromToken(token);
        return username.equals(user.getUsername()) && ! isTokenExpired(token);
    }

    //判断token是否失效
    private boolean isTokenExpired(String token) {
        Date expireDate = getExpiredDtaeFromToken(token);
        return expireDate.before(new Date());
    }

    //从token中获取过期时间
    private Date getExpiredDtaeFromToken(String token) {
        Claims claims = getClaimsFormToken(token);
        return claims.getExpiration();
    }
    //判断token是否可以被刷新，过期可被刷新
    public boolean canRefresh(String token){
        return !isTokenExpired(token);
    }
    //刷新token
    public String refershToken(String token){
        Claims claims = getClaimsFormToken(token);
        claims.put(CLAIM_KEY_CREATED,new Date());
        return generateToken(claims);
    }

}

拦截器JWTInterceptor将redis中token取出来判断

public class JWTInterceptor extends ApiController implements HandlerInterceptor {
    @Autowired
    private StringRedisTemplate redisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("token");
        // 校验token
        if (StringUtils.isNotBlank(token)) {
            // 根据 token 拿到用户名
            String username;
            try{
                username = JwtTokenUtils.getUsername(token);
            }catch (Exception e){
                throw new ServiceException("token验证失败");
            }
            // 再根据获取到的用户名 从redis中获取数据
            String sourceToken = redisTemplate.opsForValue().get(username);
            // 如果能够获取到数据，说明token未过期
            if (StringUtils.isNotBlank(sourceToken)) {
                // 如果两个token相等，代表 token有效
                if (Objects.equals(token, sourceToken)) {
                    // 请求放行
                    return true;
                }
            }
        }

        throw new ServiceException("NOTLOGIN");

    }
}

service业务层，将token存入redis

@Service("userService")
public class UserServiceImpl extends ServiceImpl<UserDao, User> implements UserService {

    @Autowired
    private StringRedisTemplate redisTemplate;
    @Resource
    private UserDao userDao;
    @Override
    public String checkUsernameAndPassword(String username, String password) {
        User user = userDao.selectUserByUsername(username);
        if (user == null || !password.equals(user.getPassword())) {
            throw new ServiceException("用户名或密码错误");
        }
        String token = JwtTokenUtils.createToken(user);
        // 存入redis中
        redisTemplate.opsForValue().set(user.getUsername(),token, JwtTokenUtils.EXPIRATION, TimeUnit.SECONDS);
        return token;
    }
}

将数据存入redis用下面语句

@Autowired
private StringRedisTemplate redisTemplate;

redisTemplate.opsForValue().set(user.getUsername(),token, JwtTokenUtils.EXPIRATION, TimeUnit.SECONDS);

set中的第一个参数是redis中的健，第二个参数是值，第三个参数是过期时间，第四个参数是时间单位

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;


@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {
    @Bean
    public CacheManager cacheManager(final RedisConnectionFactory redisConnectionFactory)
    {
        RedisCacheManager.RedisCacheManagerBuilder builder
                = RedisCacheManager.RedisCacheManagerBuilder.fromConnectionFactory(redisConnectionFactory);

        return builder.build();
    }

    @Bean(name = "springSessionDefaultRedisSerializer")
    public GenericJackson2JsonRedisSerializer getGenericJackson2JsonRedisSerializer()
    {
        return new GenericJackson2JsonRedisSerializer();
    }

    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> getRedisTemplate(
            final RedisConnectionFactory connectionFactory
    )
    {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(connectionFactory);
        // 配置默认的序列化器
        redisTemplate.setDefaultSerializer(getGenericJackson2JsonRedisSerializer());
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        // 设置 Key 的默认序列化机制
        redisTemplate.setKeySerializer(stringRedisSerializer);
        redisTemplate.setHashKeySerializer(stringRedisSerializer);
        return redisTemplate;
    }
}

解决redis序列化问题

end
  • 作者：UG666（联系作者）
  • 发表时间：2023-02-22 13:51
  • 版权声明：自由转载-非商用-非衍生-保持署名（创意共享3.0许可证）
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