系列文章目录

一、SpringBoot连接MySQL数据库实例【tk.mybatis连接mysql数据库】
二、SpringBoot连接Redis与Redisson【代码】
三、SpringBoot整合WebSocket【代码】
四、SpringBoot整合ElasticEearch【代码示例】

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代码下载地地址

Springboot整合Redis与Redisson【代码】

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一、引入依赖

    <!--  redis  --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId><version>2.1.1.RELEASE</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId><version>2.11.1</version></dependency><!--redisson--><dependency><groupId>org.redisson</groupId><artifactId>redisson</artifactId><version>2.10.0</version></dependency>

二、修改配置文件

spring:redis:database: 11host: localhostport: 6379password: 123456     # 密码（默认为空）lettuce:pool:max-active: 1000  # 连接池最大连接数（使用负值表示没有限制）max-wait: 1000ms  # 连接池最大阻塞等待时间（使用负值表示没有限制）max-idle: 10      # 连接池中的最大空闲连接min-idle: 5       # 连接池中的最小空闲连接shutdown-timeout: 50000ms

三、添加配置类

1、RedisConfig

@Slf4j
@Configuration
@EnableCaching // 开启缓存支持
public class RedisConfig extends CachingConfigurerSupport {@Beanpublic CacheManager cacheManager(LettuceConnectionFactory connectionFactory) {RedisCacheConfiguration tokenCacheConfiguration =RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(1)).disableCachingNullValues().prefixKeysWith("user");Map<String, RedisCacheConfiguration> cacheConfigurationMap = new HashMap<>();cacheConfigurationMap.put("user", tokenCacheConfiguration);RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);RedisCacheConfiguration defaultCacheConfig =RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(30));return new RedisCacheManager(redisCacheWriter, defaultCacheConfig, cacheConfigurationMap);}/*** RedisTemplate配置*/@Beanpublic RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {// 设置序列化Jackson2JsonRedisSerializer<Object> 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);// 配置redisTemplateRedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();redisTemplate.setConnectionFactory(lettuceConnectionFactory);RedisSerializer<?> stringSerializer = new StringRedisSerializer();redisTemplate.setKeySerializer(stringSerializer);// key序列化redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);// value序列化redisTemplate.setHashKeySerializer(stringSerializer);// Hash key序列化redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);// Hash value序列化redisTemplate.afterPropertiesSet();return redisTemplate;}}

2、RedissonConfig

@Configuration
public class RedissonConfig {@Value("${spring.redis.host}")private String host;@Value("${spring.redis.port}")private String port;@Value("${spring.redis.password}")private String password;@Value("${spring.redis.database}")private Integer database;@Beanpublic RedissonClient redissonClient() {Config config = new Config();config.useSingleServer().setAddress("redis://" + host + ":" + port).setPassword(password).setDatabase(database);return Redisson.create(config);}
}

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四、工具包

1、RedisUtils

package org.example.utils;import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;/*** redis 工具类** @author Lee*/
@Slf4j
@Component
public class RedisUtils {@Autowiredprivate RedisTemplate<String, Object> redisTemplate;/*** 指定缓存失效时间** @param key  键* @param time 时间(秒)* @return*/public boolean expire(String key, long time) {try {if (time > 0) {redisTemplate.expire(key, time, TimeUnit.SECONDS);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 根据key 获取过期时间** @param key 键 不能为null* @return 时间(秒) 返回0代表为永久有效*/public long getExpire(String key) {return redisTemplate.getExpire(key, TimeUnit.SECONDS);}/*** 判断key是否存在** @param key 键* @return true 存在 false不存在*/public boolean hasKey(String key) {try {return redisTemplate.hasKey(key);} catch (Exception e) {e.printStackTrace();return false;}}/*** 删除缓存** @param key 可以传一个值 或多个*/@SuppressWarnings("unchecked")public void del(String... key) {if (key != null && key.length > 0) {if (key.length == 1) {redisTemplate.delete(key[0]);} else {redisTemplate.delete(CollectionUtils.arrayToList(key));}}}/*** 查询全部key* @param keys* @return*/public Set<String> keys(String keys) {return redisTemplate.keys(keys);}// ============================String=============================/*** 普通缓存获取** @param key 键* @return 值*/public Object get(String key) {return key == null ? null : redisTemplate.opsForValue().get(key);}/*** 普通缓存放入** @param key   键* @param value 值* @return true成功 false失败*/public boolean set(String key, Object value) {try {redisTemplate.opsForValue().set(key, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 普通缓存放入并设置时间** @param key   键* @param value 值* @param time  时间(秒) time要大于0 如果time小于等于0 将设置无限期* @return true成功 false 失败*/public boolean set(String key, Object value, long time) {try {if (time > 0) {redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);} else {set(key, value);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 递增** @param key   键* @param delta 要增加几(大于0)* @return*/public long incr(String key, long delta) {if (delta < 0) {throw new RuntimeException("递增因子必须大于0");}return redisTemplate.opsForValue().increment(key, delta);}/*** 递减** @param key   键* @param delta 要减少几(小于0)* @return*/public long decr(String key, long delta) {if (delta < 0) {throw new RuntimeException("递减因子必须大于0");}return redisTemplate.opsForValue().increment(key, -delta);}// ================================Map=================================/*** HashGet** @param key  键 不能为null* @param item 项 不能为null* @return 值*/public Object hget(String key, String item) {return redisTemplate.opsForHash().get(key, item);}/*** 获取hashKey对应的所有键值** @param key 键* @return 对应的多个键值*/public Map<Object, Object> hmget(String key) {return redisTemplate.opsForHash().entries(key);}/*** HashSet** @param key 键* @param map 对应多个键值* @return true 成功 false 失败*/public boolean hmset(String key, Map<String, Object> map) {try {redisTemplate.opsForHash().putAll(key, map);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** HashSet 并设置时间** @param key  键* @param map  对应多个键值* @param time 时间(秒)* @return true成功 false失败*/public boolean hmset(String key, Map<String, Object> map, long time) {try {redisTemplate.opsForHash().putAll(key, map);if (time > 0) {expire(key, time);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 向一张hash表中放入数据,如果不存在将创建** @param key   键* @param item  项* @param value 值* @return true 成功 false失败*/public boolean hset(String key, String item, Object value) {try {redisTemplate.opsForHash().put(key, item, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 向一张hash表中放入数据,如果不存在将创建** @param key   键* @param item  项* @param value 值* @param time  时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间* @return true 成功 false失败*/public boolean hset(String key, String item, Object value, long time) {try {redisTemplate.opsForHash().put(key, item, value);if (time > 0) {expire(key, time);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 删除hash表中的值** @param key  键 不能为null* @param item 项 可以使多个 不能为null*/public void hdel(String key, Object... item) {redisTemplate.opsForHash().delete(key, item);}/*** 判断hash表中是否有该项的值** @param key  键 不能为null* @param item 项 不能为null* @return true 存在 false不存在*/public boolean hHasKey(String key, String item) {return redisTemplate.opsForHash().hasKey(key, item);}/*** hash递增 如果不存在,就会创建一个 并把新增后的值返回** @param key  键* @param item 项* @param by   要增加几(大于0)* @return*/public double hincr(String key, String item, double by) {return redisTemplate.opsForHash().increment(key, item, by);}/*** hash递减** @param key  键* @param item 项* @param by   要减少记(小于0)* @return*/public double hdecr(String key, String item, double by) {return redisTemplate.opsForHash().increment(key, item, -by);}// ============================set=============================/*** 根据key获取Set中的所有值** @param key 键* @return*/public Set<Object> sGet(String key) {try {return redisTemplate.opsForSet().members(key);} catch (Exception e) {e.printStackTrace();return null;}}/*** 根据value从一个set中查询,是否存在** @param key   键* @param value 值* @return true 存在 false不存在*/public boolean sHasKey(String key, Object value) {try {return redisTemplate.opsForSet().isMember(key, value);} catch (Exception e) {e.printStackTrace();return false;}}/*** 将数据放入set缓存** @param key    键* @param values 值 可以是多个* @return 成功个数*/public long sSet(String key, Object... values) {try {return redisTemplate.opsForSet().add(key, values);} catch (Exception e) {e.printStackTrace();return 0;}}/*** 将set数据放入缓存** @param key    键* @param time   时间(秒)* @param values 值 可以是多个* @return 成功个数*/public long sSetAndTime(String key, long time, Object... values) {try {Long count = redisTemplate.opsForSet().add(key, values);if (time > 0)expire(key, time);return count;} catch (Exception e) {e.printStackTrace();return 0;}}/*** 获取set缓存的长度** @param key 键* @return*/public long sGetSetSize(String key) {try {return redisTemplate.opsForSet().size(key);} catch (Exception e) {e.printStackTrace();return 0;}}/*** 移除值为value的** @param key    键* @param values 值 可以是多个* @return 移除的个数*/public long setRemove(String key, Object... values) {try {Long count = redisTemplate.opsForSet().remove(key, values);return count;} catch (Exception e) {e.printStackTrace();return 0;}}// ===============================list=================================/*** 获取list缓存的内容** @param key   键* @param start 开始* @param end   结束 0 到 -1代表所有值* @return*/public List<Object> lGet(String key, long start, long end) {try {return redisTemplate.opsForList().range(key, start, end);} catch (Exception e) {e.printStackTrace();return null;}}/*** 获取list缓存的长度** @param key 键* @return*/public long lGetListSize(String key) {try {return redisTemplate.opsForList().size(key);} catch (Exception e) {e.printStackTrace();return 0;}}/*** 通过索引 获取list中的值** @param key   键* @param index 索引 index>=0时， 0 表头，1 第二个元素，依次类推；index<0时，-1，表尾，-2倒数第二个元素，依次类推* @return*/public Object lGetIndex(String key, long index) {try {return redisTemplate.opsForList().index(key, index);} catch (Exception e) {e.printStackTrace();return null;}}/*** 将list放入缓存** @param key   键* @param value 值* @return*/public boolean lSet(String key, Object value) {try {redisTemplate.opsForList().rightPush(key, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 将list放入缓存** @param key   键* @param value 值* @param time  时间(秒)* @return*/public boolean lSet(String key, Object value, long time) {try {redisTemplate.opsForList().rightPush(key, value);if (time > 0)expire(key, time);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 将list放入缓存** @param key   键* @param value 值* @return*/public boolean lSet(String key, List<Object> value) {try {redisTemplate.opsForList().rightPushAll(key, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 将list放入缓存** @param key   键* @param value 值* @param time  时间(秒)* @return*/public boolean lSet(String key, List<Object> value, long time) {try {redisTemplate.opsForList().rightPushAll(key, value);if (time > 0)expire(key, time);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 根据索引修改list中的某条数据** @param key   键* @param index 索引* @param value 值* @return*/public boolean lUpdateIndex(String key, long index, Object value) {try {redisTemplate.opsForList().set(key, index, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 移除N个值为value** @param key   键* @param count 移除多少个* @param value 值* @return 移除的个数*/public long lRemove(String key, long count, Object value) {try {Long remove = redisTemplate.opsForList().remove(key, count, value);return remove;} catch (Exception e) {e.printStackTrace();return 0;}}}

2、RedissonUtils

@Service
public class RedissonUtils {private final RedisTemplate<String, Object> redisTemplate;private final RedissonClient redissonClient;private static final String TEST_LOCK_1 = "TEST_LOCK_1";private static final String TEST_LOCK_2 = "TEST_LOCK_2";public RedissonUtils(RedisTemplate<String, Object> redisTemplate, RedissonClient redissonClient) {this.redisTemplate = redisTemplate;this.redissonClient = redissonClient;}public void test1(Integer guidanceTimeId) {// 获取 Redisson 的分布式锁RLock lock = redissonClient.getLock(TEST_LOCK_1);try {// 尝试获取锁lock.lock();// 业务代码
//            String key = test1;
//            redisTemplate.opsForValue().decrement(key);} catch (Exception e) {e.printStackTrace();} finally {// 释放锁lock.unlock();}}public void test2(Integer guidanceTimeId) {// 获取 Redisson 的分布式锁RLock lock = redissonClient.getLock(TEST_LOCK_2);try {// 尝试获取锁lock.lock();// 业务代码
//            String key = test2;
//            redisTemplate.opsForValue().increment(key);} catch (Exception e) {e.printStackTrace();} finally {// 释放锁lock.unlock();}}
}