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  • SpringBoot整合redis

    转载于:

    RedisUtils工具类

    springboot整合redis出现乱码解决方法

    1、引入依赖

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-redis</artifactId>
            </dependency>

    2、新建配置类  RedisConfig (解决序列化问题)

    package com.aircas.satellitemanagement.redis;
    
    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.RedisCacheConfiguration;
    import org.springframework.data.redis.cache.RedisCacheManager;
    import org.springframework.data.redis.cache.RedisCacheWriter;
    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.Jackson2JsonRedisSerializer;
    import org.springframework.data.redis.serializer.RedisSerializationContext;
    import org.springframework.data.redis.serializer.StringRedisSerializer;
    
    import java.time.Duration;
    
    @Configuration
    @EnableCaching
    public class RedisConfig extends CachingConfigurerSupport {
        private static final StringRedisSerializer STRING_SERIALIZER = new StringRedisSerializer();
        private static final GenericJackson2JsonRedisSerializer JACKSON__SERIALIZER = new GenericJackson2JsonRedisSerializer();
    
        @Bean
        public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
            //设置缓存过期时间
            RedisCacheConfiguration redisCacheCfg = RedisCacheConfiguration.defaultCacheConfig()
                    .entryTtl(Duration.ofHours(1))
                    .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(STRING_SERIALIZER))
                    .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(JACKSON__SERIALIZER));
            return RedisCacheManager.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
                    .cacheDefaults(redisCacheCfg)
                    .build();
        }
    
        @Bean
        @ConditionalOnMissingBean(name = "redisTemplate")
        public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
            // 配置redisTemplate
            RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
            redisTemplate.setConnectionFactory(factory);
            // key序列化
            redisTemplate.setKeySerializer(STRING_SERIALIZER);
            // value序列化
            redisTemplate.setValueSerializer(JACKSON__SERIALIZER);
            // Hash key序列化
            redisTemplate.setHashKeySerializer(STRING_SERIALIZER);
            // Hash value序列化
            redisTemplate.setHashValueSerializer(JACKSON__SERIALIZER);
            redisTemplate.afterPropertiesSet();
            return redisTemplate;
        }
    }

    3、新建 RedisUtil类(方便操作redis)

    package com.aircas.satellitemanagement.redis;
    
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.stereotype.Component;
    import org.springframework.util.CollectionUtils;
    
    import javax.annotation.Resource;
    import java.util.Collection;
    import java.util.List;
    import java.util.Map;
    import java.util.Set;
    import java.util.concurrent.TimeUnit;
    
    @Component
    public final class RedisUtil {
    
        @Resource
        private RedisTemplate<String, Object> redisTemplate;
    
        // =============================common============================
    
        /**
         * 指定缓存失效时间
         *
         * @param key  键
         * @param time 时间(秒)
         */
        public boolean expire(String key, long time, TimeUnit timeUnit) {
            try {
                if (time > 0) {
                    redisTemplate.expire(key, time, timeUnit);
                }
                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((Collection<String>) CollectionUtils.arrayToList(key));
                }
            }
        }
    
    
        // ============================String=============================
    
        /**
         * 普通缓存获取
         *
         * @param key 键
         * @return*/
        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)
         */
        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)
         */
        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
         */
        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
         */
        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, TimeUnit timeUnit) {
            try {
                redisTemplate.opsForHash().putAll(key, map);
                if (time > 0) {
                    expire(key, time, timeUnit);
                }
                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, TimeUnit timeUnit) {
            try {
                redisTemplate.opsForHash().put(key, item, value);
                if (time > 0) {
                    expire(key, time, timeUnit);
                }
                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)
         */
        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)
         */
        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
         */
        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, TimeUnit timeUnit, Object... values) {
            try {
                Long count = redisTemplate.opsForSet().add(key, values);
                if (time > 0) {
                    expire(key, time, timeUnit);
                }
                return count;
            } catch (Exception e) {
                e.printStackTrace();
                return 0;
            }
        }
    
    
        /**
         * 获取set缓存的长度
         *
         * @param key 键
         */
        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
         */
        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
         */
        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
         */
        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
         */
        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)
         */
        public boolean lSet(String key, Object value, long time, TimeUnit timeUnit) {
            try {
                redisTemplate.opsForList().rightPush(key, value);
                if (time > 0) {
                    expire(key, time, timeUnit);
                }
                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, TimeUnit timeUnit) {
            try {
                redisTemplate.opsForList().rightPushAll(key, value);
                if (time > 0) {
                    expire(key, time, timeUnit);
                }
                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;
            }
    
        }
    
        // ===============================HyperLogLog=================================
    
        public long pfadd(String key, String value) {
            return redisTemplate.opsForHyperLogLog().add(key, value);
        }
    
        public long pfcount(String key) {
            return redisTemplate.opsForHyperLogLog().size(key);
        }
    
        public void pfremove(String key) {
            redisTemplate.opsForHyperLogLog().delete(key);
        }
    
        public void pfmerge(String key1, String key2) {
            redisTemplate.opsForHyperLogLog().union(key1, key2);
        }
    
    
    }

    4、可以使用了

    package com.aircas.satellitemanagement.redis;
    
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    
    @RestController
    @RequestMapping(value = "/redis/test")
    public class redisController {
    
    
        @Autowired
        RedisUtil redisUtil;
    
        @GetMapping(value = "")
        public void test1() {
    
            redisUtil.set("test", "test");
            Object test = redisUtil.get("test");
            System.out.println(test.toString());
    
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/myfrank/p/14317852.html
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