1:什么是Token?:三部分组成:头+有效负载+签名
1.1 JWT创建中的一些方法讲解:
public static String createTokenWithClaim(User user){
Map<String,Object> map = new HashMap<>();
map.put("typ","JWT");
map.put("alg","HS256");
Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
Date nowDate = new Date();
Date expireDate = new Date(System.currentTimeMillis() + EXPIRE_TIME);
String token = JWT.create().withHeader(map)
.withClaim("loginName",user.getRead_username())
.withClaim("deptName","技术部")
.withClaim("loginPass",user.getRead_userpass())
.withIssuer("SERVICE")
.withSubject("this is test token")
.withAudience("APP")
.withIssuedAt(nowDate)
.withExpiresAt(expireDate)
.sign(algorithm);
return token;
}
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1.2: JWT解密中的一些方法讲解:
public static void verifyToken(String token){
Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
JWTVerifier verifier = JWT.require(algorithm)
.build();
DecodedJWT jwt = verifier.verify(token);
String subject = jwt.getSubject();
List<String> audience = jwt.getAudience();
Map<String, Claim> claims = jwt.getClaims();
for (Map.Entry<String, Claim> entry : claims.entrySet()){
String key = entry.getKey();
Claim claim = entry.getValue();
String value = claim.asString();
System.out.println("key:"+key+" value:"+claim.asString());
}
}
}
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2:Springboot+JWT+Redis实现登陆登出功能
2.1:首先我们在pom引入redis:
<!-- JWT -->
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>3.4.0</version>
</dependency>
<!-- Redis依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
<!-- 1.5的版本默认采用的连接池技术是jedis 2.0以上版本默认连接池是lettuce, 在这里采用jedis,所以需要排除lettuce的jar -->
<exclusions>
<exclusion>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</exclusion>
<exclusion>
<groupId>io.lettuce</groupId>
<artifactId>lettuce-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- 添加jedis客户端 -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
<!--spring2.0集成redis所需common-pool2-->
<!-- 必须加上,jedis依赖此 -->
<!-- spring boot 2.0 的操作手册有标注 大家可以去看看 地址是:https://docs.spring.io/spring-boot/docs/2.0.3.RELEASE/reference/htmlsingle/-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>RELEASE</version>
</dependency>

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2.2:在application.yml中配置:
redis:
# Redis服务器地址
host: 127.0.0.1
# Redis数据库索引(默认为0)
database: 0
# Redis服务器连接端口
port: 6379
password:
#连接超时时间(毫秒)
timeout: 3600
2.3:基础的BaseRedisConfig配置类,序列化:
package com.example.common;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
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.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.lang.reflect.Method;
import java.time.Duration;
@Configuration
@EnableCaching
public class BaseRedisConfig {
@Bean
public KeyGenerator keyGenerator() {
return new KeyGenerator() {
@Override
public Object generate(Object target, Method method, Object... params) {
StringBuilder sb = new StringBuilder();
sb.append(target.getClass().getName());
sb.append(method.getName());
for (Object obj : params) {
sb.append(obj.toString());
}
return sb.toString();
}
};
}
@Bean
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(redisConnectionFactory);
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
@Bean
public CacheManager cacheManager(RedisConnectionFactory factory) {
RedisSerializer<String> redisSerializer = new StringRedisSerializer();
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(600))
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
.disableCachingNullValues();
RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
.cacheDefaults(config)
.build();
return cacheManager;
}
}

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2.4:对redis中的redisTemplate封装:(接口和实现类)

package com.example.service;
import org.springframework.data.domain.Sort;
import org.springframework.data.geo.Distance;
import org.springframework.data.geo.GeoResults;
import org.springframework.data.geo.Point;
import org.springframework.data.redis.connection.RedisGeoCommands;
import java.util.List;
import java.util.Map;
import java.util.Set;
public interface RedisService {
void set(String key, Object value, long time);
void set(String key, Object value);
Object get(String key);
Boolean del(String key);
Long del(List<String> keys);
Boolean expire(String key, long time);
Long getExpire(String key);
Boolean hasKey(String key);
Long incr(String key, long delta);
Long decr(String key, long delta);
Object hGet(String key, String hashKey);
Boolean hSet(String key, String hashKey, Object value, long time);
void hSet(String key, String hashKey, Object value);
Map<Object, Object> hGetAll(String key);
Boolean hSetAll(String key, Map<String, Object> map, long time);
void hSetAll(String key, Map<String, ?> map);
void hDel(String key, Object... hashKey);
Boolean hHasKey(String key, String hashKey);
Long hIncr(String key, String hashKey, Long delta);
Long hDecr(String key, String hashKey, Long delta);
Set<Object> sMembers(String key);
Long sAdd(String key, Object... values);
Long sAdd(String key, long time, Object... values);
Boolean sIsMember(String key, Object value);
Long sSize(String key);
Long sRemove(String key, Object... values);
List<Object> lRange(String key, long start, long end);
Long lSize(String key);
Object lIndex(String key, long index);
Long lPush(String key, Object value);
Long lPush(String key, Object value, long time);
Long lPushAll(String key, Object... values);
Long lPushAll(String key, Long time, Object... values);
Long lRemove(String key, long count, Object value);
Boolean bitAdd(String key, int offset, boolean b);
Boolean bitGet(String key, int offset);
Long bitCount(String key);
List<Long> bitField(String key, int limit, int offset);
byte[] bitGetAll(String key);
Long geoAdd(String key, Double x, Double y, String name);
List<Point> geoGetPointList(String key, Object... place);
Distance geoCalculationDistance(String key, String placeOne, String placeTow);
GeoResults<RedisGeoCommands.GeoLocation<Object>> geoNearByPlace(String key, String place, Distance distance, long limit, Sort.Direction sort);
List<String> geoGetHash(String key, String... place);
}

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2.5:RedisServiceImpl
package com.example.service.impl;
import com.example.service.RedisService;
import org.springframework.data.domain.Sort;
import org.springframework.data.geo.Distance;
import org.springframework.data.geo.GeoResults;
import org.springframework.data.geo.Point;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.connection.RedisGeoCommands;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
@Service
public class RedisServiceImpl implements RedisService {
@Resource
private RedisTemplate<String, Object> redisTemplate;
@Override
public void set(String key, Object value, long time) {
redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
}
@Override
public void set(String key, Object value) {
redisTemplate.opsForValue().set(key, value);
}
@Override
public Object get(String key) {
return redisTemplate.opsForValue().get(key);
}
@Override
public Boolean del(String key) {
return redisTemplate.delete(key);
}
@Override
public Long del(List<String> keys) {
return redisTemplate.delete(keys);
}
@Override
public Boolean expire(String key, long time) {
return redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
@Override
public Long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
@Override
public Boolean hasKey(String key) {
return redisTemplate.hasKey(key);
}
@Override
public Long incr(String key, long delta) {
return redisTemplate.opsForValue().increment(key, delta);
}
@Override
public Long decr(String key, long delta) {
return redisTemplate.opsForValue().increment(key, -delta);
}
@Override
public Object hGet(String key, String hashKey) {
return redisTemplate.opsForHash().get(key, hashKey);
}
@Override
public Boolean hSet(String key, String hashKey, Object value, long time) {
redisTemplate.opsForHash().put(key, hashKey, value);
return expire(key, time);
}
@Override
public void hSet(String key, String hashKey, Object value) {
redisTemplate.opsForHash().put(key, hashKey, value);
}
@Override
public Map<Object, Object> hGetAll(String key) {
return redisTemplate.opsForHash().entries(key);
}
@Override
public Boolean hSetAll(String key, Map<String, Object> map, long time) {
redisTemplate.opsForHash().putAll(key, map);
return expire(key, time);
}
@Override
public void hSetAll(String key, Map<String, ?> map) {
redisTemplate.opsForHash().putAll(key, map);
}
@Override
public void hDel(String key, Object... hashKey) {
redisTemplate.opsForHash().delete(key, hashKey);
}
@Override
public Boolean hHasKey(String key, String hashKey) {
return redisTemplate.opsForHash().hasKey(key, hashKey);
}
@Override
public Long hIncr(String key, String hashKey, Long delta) {
return redisTemplate.opsForHash().increment(key, hashKey, delta);
}
@Override
public Long hDecr(String key, String hashKey, Long delta) {
return redisTemplate.opsForHash().increment(key, hashKey, -delta);
}
@Override
public Set<Object> sMembers(String key) {
return redisTemplate.opsForSet().members(key);
}
@Override
public Long sAdd(String key, Object... values) {
return redisTemplate.opsForSet().add(key, values);
}
@Override
public Long sAdd(String key, long time, Object... values) {
Long count = redisTemplate.opsForSet().add(key, values);
expire(key, time);
return count;
}
@Override
public Boolean sIsMember(String key, Object value) {
return redisTemplate.opsForSet().isMember(key, value);
}
@Override
public Long sSize(String key) {
return redisTemplate.opsForSet().size(key);
}
@Override
public Long sRemove(String key, Object... values) {
return redisTemplate.opsForSet().remove(key, values);
}
@Override
public List<Object> lRange(String key, long start, long end) {
return redisTemplate.opsForList().range(key, start, end);
}
@Override
public Long lSize(String key) {
return redisTemplate.opsForList().size(key);
}
@Override
public Object lIndex(String key, long index) {
return redisTemplate.opsForList().index(key, index);
}
@Override
public Long lPush(String key, Object value) {
return redisTemplate.opsForList().rightPush(key, value);
}
@Override
public Long lPush(String key, Object value, long time) {
Long index = redisTemplate.opsForList().rightPush(key, value);
expire(key, time);
return index;
}
@Override
public Long lPushAll(String key, Object... values) {
return redisTemplate.opsForList().rightPushAll(key, values);
}
@Override
public Long lPushAll(String key, Long time, Object... values) {
Long count = redisTemplate.opsForList().rightPushAll(key, values);
expire(key, time);
return count;
}
@Override
public Long lRemove(String key, long count, Object value) {
return redisTemplate.opsForList().remove(key, count, value);
}
@Override
public Boolean bitAdd(String key, int offset, boolean b) {
return redisTemplate.opsForValue().setBit(key, offset, b);
}
@Override
public Boolean bitGet(String key, int offset) {
return redisTemplate.opsForValue().getBit(key, offset);
}
@Override
public Long bitCount(String key) {
return redisTemplate.execute((RedisCallback<Long>) con -> con.bitCount(key.getBytes()));
}
@Override
public List<Long> bitField(String key, int limit, int offset) {
return redisTemplate.execute((RedisCallback<List<Long>>) con ->
con.bitField(key.getBytes(),
BitFieldSubCommands.create().get(BitFieldSubCommands.BitFieldType.unsigned(limit)).valueAt(offset)));
}
@Override
public byte[] bitGetAll(String key) {
return redisTemplate.execute((RedisCallback<byte[]>) con -> con.get(key.getBytes()));
}
@Override
public Long geoAdd(String key, Double x, Double y, String name) {
return redisTemplate.opsForGeo().add(key, new Point(x, y), name);
}
@Override
public List<Point> geoGetPointList(String key, Object... place) {
return redisTemplate.opsForGeo().position(key, place);
}
@Override
public Distance geoCalculationDistance(String key, String placeOne, String placeTow) {
return redisTemplate.opsForGeo()
.distance(key, placeOne, placeTow, RedisGeoCommands.DistanceUnit.KILOMETERS);
}
@Override
public GeoResults<RedisGeoCommands.GeoLocation<Object>> geoNearByPlace(String key, String place, Distance distance, long limit, Sort.Direction sort) {
RedisGeoCommands.GeoRadiusCommandArgs args = RedisGeoCommands.GeoRadiusCommandArgs.newGeoRadiusArgs().includeDistance().includeCoordinates();
if (Sort.Direction.ASC == sort) {
args.sortAscending();
} else {
args.sortDescending();
}
args.limit(limit);
return redisTemplate.opsForGeo()
.radius(key, place, distance, args);
}
@Override
public List<String> geoGetHash(String key, String... place) {
return redisTemplate.opsForGeo()
.hash(key, place);
}
}

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2.6:登录接口填写:
@PostMapping("/login")
public Result<User> login(@RequestBody User user) {
User res = userService.login(user);
if (redisService.get(user.getUsername())==null){
String token = JWT.create()
.withAudience(res.getUsername())
.sign(Algorithm.HMAC256(res.getPassword()));
res.setToken(token);
logService.log(user.getUsername(), StrUtil.format("用户 {} 登录系统", user.getUsername()));
redisService.set(res.getUsername(),token,1800);
return Result.success(res);
}
else {
return Result.error("500","你已在其他设备登陆");
}
}
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2.7:登出接口填写:
@DeleteMapping
public Result<?> loginOut(HttpServletRequest request){
String token = request.getHeader("token");
String username = JWT.decode(token).getAudience().get(0);
redisService.del(username);
return Result.success("退出成功");
}
2.8:拦截器:

package com.example.common;
import cn.hutool.core.util.StrUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.example.entity.User;
import com.example.exception.CustomException;
import com.example.service.RedisService;
import com.example.service.UserService;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AuthInterceptor implements HandlerInterceptor {
@Resource
private UserService userService;
@Resource
private RedisService redisService;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
String token = request.getHeader("token");
if (StrUtil.isBlank(token)) {
throw new CustomException("401", "未获取到token, 请重新登录");
}
String username;
try {
username = JWT.decode(token).getAudience().get(0);
} catch (JWTDecodeException j) {
throw new CustomException("401", "权限验证失败, 请重新登录");
}
if (redisService.get(username)==null){
throw new CustomException("401", "token已过期");
}
if (redisService.get(username).equals(token)){
User user = userService.getOne(Wrappers.<User>lambdaQuery().eq(User::getUsername, username));
if (user == null) {
throw new CustomException("401", "用户不存在, 请重新登录");
}
JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(user.getPassword())).build();
try {
jwtVerifier.verify(token);
} catch (JWTVerificationException e) {
throw new CustomException("401", "token不合法, 请重新登录");
}
return true;
}
throw new CustomException("401", "token不一致");
}
}

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