分享一个超全的基于jedis的Redis工具类

沙海 2021年7月19日01:25:10Java评论62字数 22030阅读73分26秒阅读模式
摘要

智能摘要

智能摘要文章源自JAVA秀-https://www.javaxiu.com/38126.html

原则上使用一个redis库存放数据,通过特定的key的命令规则来区分不同的数据就行了。实际上不执行该方法也执行了上面的命令,但是结果确不一定完全正确。文章源自JAVA秀-https://www.javaxiu.com/38126.html

原文约 3468 | 图片 3 | 建议阅读 7 分钟 | 评价反馈文章源自JAVA秀-https://www.javaxiu.com/38126.html

分享一个超全的基于jedis的Redis工具类

小哈学Java 文章源自JAVA秀-https://www.javaxiu.com/38126.html

分享一个超全的基于jedis的Redis工具类文章源自JAVA秀-https://www.javaxiu.com/38126.html

以下为部分代码,完整的代码和redis应用实例,请移步到码云。文章源自JAVA秀-https://www.javaxiu.com/38126.html

码云地址:文章源自JAVA秀-https://www.javaxiu.com/38126.html

https://gitee.com/JYFlyer/spring-boot-redis-case文章源自JAVA秀-https://www.javaxiu.com/38126.html

/** * 基于jedis的redis操作工具类 * @author jyf * @time 2019/8/3 22:30 */public final class RedisUtils {    /*    除了该工具类提供的方法外,还可以在外面调用getJedis()方法,获取到jedis实例后,调用它原生的api来操作     */     /**     * 获取jedis对象,并选择redis库。jedis默认是0号库,可传入1-16之间的数选择库存放数据     * 原则上使用一个redis库存放数据,通过特定的key的命令规则来区分不同的数据就行了。     *     * @param index redis库号。使用可变参数的目的就是该参数可传可不传。     * @return 返回jedis对象     */    public static Jedis getJedis(int... index) {        Jedis jedis = MyJedisPoolConfig.getJedisPool().getResource();        if (index != null && index.length > 0) {            if (index[0] > 0 && index[0] <= 16){                jedis.select(index[0]);            }        }        return jedis;    }     /*########################  key的操作  ################################*/     /**     * 根据pattern返回当前库中的key     *     * @param pattern     * @return     */    public static Set<String> keys(String pattern) {        Jedis jedis = null;        Set<String> keys = null;        try {            jedis = getJedis();            keys = jedis.keys(pattern);        }finally {            if (jedis != null){                jedis.close();            }        }        return keys;    }     /**     * 删除一个或多个key     *     * @param key 一个或多个key     */    public static Long del(String... key) {        Jedis jedis = null;        Long delNum = 0L;        try {            jedis = getJedis();            delNum =jedis.del(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return delNum;    }     /**     * 批量删除     * @param keyList 要删除的key的集合     */    public static void mdel(List<String> keyList){        Jedis jedis = getJedis();        //获取pipeline        Pipeline pipeline = jedis.pipelined();        for (String key : keyList) {            pipeline.del(key);        }        //执行结果同步,这样才能保证结果的正确性。实际上不执行该方法也执行了上面的命令,但是结果确不一定完全正确。        //注意        pipeline.sync();        //关闭连接        jedis.close();    }     /**     * 判断某个key是否还存在     *     * @param key key     * @return     */    public static Boolean exists(String key) {        Jedis jedis = null;        Boolean flag = false;        try {            jedis = getJedis();            flag = jedis.exists(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return flag;    }     /**     * 设置某个key的过期时间,单位秒     *     * @param key key     * @param seconds 过期时间秒     */    public static void expire(String key, int seconds) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.expire(key, seconds);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 查看某个key还有几秒过期,-1表示永不过期 ,-2表示已过期     *     * @param key key     * @return     */    public static Long timeToLive(String key) {        Jedis jedis = null;        Long ttl;        try {            jedis = getJedis();            ttl = jedis.ttl(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return ttl;    }     /**     * 查看某个key对应的value的类型     *     * @param key     * @return     */    public static String type(String key) {        Jedis jedis = null;        String type = null;        try {            jedis = getJedis();            type = jedis.type(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return type;    }      /*########################  string(字符串)的操作  ####################*/     /**     * 获取某个key的value,类型要对,只能value是string的才能获取     *     * @param key     * @return     */    public static String get(String key) {        Jedis jedis = null;        String value = null;        try {            jedis = getJedis();            value = jedis.get(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return value;    }     /**     * 设置某个key的value     *     * @param key     * @param value     */    public static void set(String key, String value) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.set(key, value);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 字符串后追加内容     *     * @param key key     * @param appendContent 要追加的内容     */    public static void append(String key, String appendContent) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.append(key, appendContent);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 返回key的value的长度     *     * @param key     * @return     */    public static Long strlen(String key) {        Jedis jedis = null;        Long strLen = 0L;        try {            jedis = getJedis();            strLen = jedis.strlen(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return strLen;    }     /**     * value 加1 必     * 须是字符型数字     * @param key     * @return 增加后的值     */    public static Long incr(String key) {        Jedis jedis = null;        Long incrResult = 0L;        try {            jedis = getJedis();            incrResult = jedis.incr(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return incrResult;    }     /**     * value 减1   必须是字符型数字     *     * @param key     * @return     */    public static Long decr(String key) {        Jedis jedis = null;        Long decrResult = 0L;        try {            jedis = getJedis();            decrResult = jedis.decr(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return decrResult;    }     /**     * value 加increment     *     * @param key key     * @param increment 加几     * @return     */    public static Long incrby(String key, int increment) {        Jedis jedis = null;        Long incrByResult = 0L;        try {            jedis = getJedis();            incrByResult = jedis.incrBy(key, increment);        }finally {            if (jedis != null){                jedis.close();            }        }        return incrByResult;    }     /**     * value 减increment     *     * @param key     * @param increment     * @return     */    public static Long decrby(String key, int increment) {        Jedis jedis = null;        Long decrByResult = 0L;        try {            jedis = getJedis();            decrByResult = jedis.decrBy(key, increment);        }finally {            if (jedis != null){                jedis.close();            }        }        return decrByResult;    }     /**     * 给某个key设置过期时间和value,成功返回OK     *     * @param key key     * @param seconds 过期时间秒     * @param value 设置的值     * @return     */    public static String setex(String key, int seconds, String value) {        Jedis jedis = null;        String result = null;        try {            jedis = getJedis();            result = jedis.setex(key, seconds, value);        }finally {            if (jedis != null){                jedis.close();            }        }        return result;    }      /*########################  list(列表)的操作  #######################*/    //lpush rpush lpop rpop lrange lindex llen lset     /**     * 从左边向列表中添加值     *     * @param key key     * @param str 要添加的值     */    public static void lpush(String key, String str) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.lpush(key, str);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 从右边向列表中添加值     *     * @param key key     * @param str 要添加的值     */    public static void rpush(String key, String str) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.rpush(key, str);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 从左边取出一个列表中的值     *     * @param key     * @return     */    public static String lpop(String key) {        Jedis jedis = null;        String lpop = null;        try {            jedis = getJedis();            lpop = jedis.lpop(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return lpop;    }     /**     * 从右边取出一个列表中的值     *     * @param key     * @return     */    public static String rpop(String key) {        Jedis jedis = null;        String rpop = null;        try {            jedis = getJedis();            rpop = jedis.rpop(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return rpop;    }     /**     * 取出列表中指定范围内的值,0 到 -1 表示全部     *     * @param key     * @param startIndex     * @param endIndex     * @return     */    public static List<String> lrange(String key, int startIndex, int endIndex) {        Jedis jedis = null;        List<String> result = null;        try {            jedis = getJedis();            result = jedis.lrange(key, startIndex, endIndex);        }finally {            if (jedis != null){                jedis.close();            }        }        return result;    }     /**     * 返回某列表指定索引位置的值     *     * @param key 列表key     * @param index 索引位置     * @return     */    public static String lindex(String key, int index) {        Jedis jedis = null;        String lindex = null;        try {            jedis = getJedis();            lindex = jedis.lindex(key, index);        }finally {            if (jedis != null){                jedis.close();            }        }        return lindex;    }     /**     * 返回某列表的长度     *     * @param key     * @return     */    public static Long llen(String key) {        Jedis jedis = null;        Long llen = 0L;        try {            jedis = getJedis();            llen = jedis.llen(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return llen;    }     /**     * 给某列表指定位置设置为指定的值     *     * @param key     * @param index     * @param str     */    public static void lset(String key, Long index, String str) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.lset(key, index, str);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 对列表进行剪裁,保留指定闭区间的元素(索引位置也会重排)     * @param key 列表key     * @param startIndex 开始索引位置     * @param endIndex 结束索引位置     */    public static void ltrim(String key,Integer startIndex,Integer endIndex){        Jedis jedis = null;        try {            jedis = getJedis();            jedis.ltrim(key, startIndex, endIndex);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 从列表的左边阻塞弹出一个元素     * @param key 列表的key     * @param timeout 阻塞超时时间,0表示若没有元素就永久阻塞     * @return     */    public static List<String> blpop(String key,Integer timeout){        Jedis jedis = null;        List<String> valueList = null;        try {            jedis = getJedis();            valueList = jedis.blpop(timeout, key);        }finally {            if (jedis != null){                jedis.close();            }        }        return valueList;    }     /**     * 从列表的右边阻塞弹出一个元素     * @param key 列表的key     * @param timeout 阻塞超时时间,0表示若没有元素就永久阻塞     * @return     */    public static List<String> brpop(String key,Integer timeout){        Jedis jedis = null;        List<String> valueList = null;        try {            jedis = getJedis();            valueList = jedis.brpop(timeout, key);        }finally {            if (jedis != null){                jedis.close();            }        }        return valueList;    }      /*########################  hash(哈希表)的操作  #######################*/    //hset hget hmset hmget hgetall hdel hkeys hvals hexists hincrby     /**     * 给某个hash表设置一个键值对     *     * @param key     * @param field     * @param value     */    public static void hset(String key, String field, String value) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.hset(key, field, value);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 取出某个hash表中某个field对应的value     *     * @param key key     * @param field field     * @return     */    public static String hget(String key, String field) {        Jedis jedis = null;        String hget = null;        try {            jedis = getJedis();            hget = jedis.hget(key, field);        }finally {            if (jedis != null){                jedis.close();            }        }        return hget;    }     /**     * 某个hash表设置一个或多个键值对     *     * @param key     * @param kvMap     */    public static void hmset(String key, Map<String, String> kvMap) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.hmset(key, kvMap);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 取出某个hash表中任意多个key对应的value的集合     *     * @param key     * @param fields     * @return     */    public static List<String> hmget(String key, String... fields) {        Jedis jedis = null;        List<String> hmget = null;        try {            jedis = getJedis();            hmget = jedis.hmget(key, fields);        }finally {            if (jedis != null){                jedis.close();            }        }        return hmget;    }     /**     * 取出某个hash表中所有的键值对     *     * @param key     * @return     */    public static Map<String, String> hgetall(String key) {        Jedis jedis = null;        Map<String, String> kvMap = null;        try {            jedis = getJedis();            kvMap = jedis.hgetAll(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return kvMap;    }     /**     * 判断某个hash表中的某个key是否存在     *     * @param key     * @param field     * @return     */    public static Boolean hexists(String key, String field) {        Jedis jedis = null;        Boolean exists = null;        try {            jedis = getJedis();            exists = jedis.hexists(key, field);        }finally {            if (jedis != null){                jedis.close();            }        }        return exists;    }     /**     * 返回某个hash表中所有的key     *     * @param key     * @return     */    public static Set<String> hkeys(String key) {        Jedis jedis = null;        Set<String> keys = null;        try {            jedis = getJedis();            keys = jedis.hkeys(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return keys;    }     /**     * 返回某个hash表中所有的value     *     * @param key     * @return     */    public static List<String> hvals(String key) {        Jedis jedis = null;        List<String> hvals = null;        try {            jedis = getJedis();            hvals = jedis.hvals(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return hvals;    }     /**     * 删除某个hash表中的一个或多个键值对     *     * @param key     * @param fields     */    public static void hdel(String key, String... fields) {        Jedis jedis = null;        try {            jedis = getJedis();            jedis.hdel(key, fields);        }finally {            if (jedis != null){                jedis.close();            }        }    }     /**     * 给某个hash表中的某个field的value增加多少     *     * @param key       hash表的key     * @param field     表中的某个field     * @param increment 增加多少     * @return     */    public static Long hincrby(String key, String field, Long increment) {        Jedis jedis = null;        Long result = null;        try {            jedis = getJedis();            result = jedis.hincrBy(key, field, increment);        }finally {            if (jedis != null){                jedis.close();            }        }        return result;    }     /*########################  set(集合)的操作  ###########################*/     /**     * 往set集合中添加一个或多个元素     * @param key key     * @param members 要添加的元素     * @return 添加成功的元素个数     */    public static Long sadd(String key,String... members){        Jedis jedis = null;        Long num = 0L;        try {            jedis = getJedis();            num = jedis.sadd(key, members);        }finally {            if (jedis != null){                jedis.close();            }        }        return num;    }     /**     * 返回set集合中的所有元素,顺序与加入时的顺序一致     * @param key key     * @return     */    public static Set<String> smembers(String key){        Jedis jedis = null;        Set<String> members = null;        try {            jedis = getJedis();            members = jedis.smembers(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return members;    }     /**     * 判断集合中是否存在某个元素     * @param key key     * @param member 某个元素     * @return true存在,false不存在     */    public static Boolean sismember(String key,String member){        Jedis jedis = null;        Boolean isMember = false;        try {            jedis = getJedis();            isMember = jedis.sismember(key, member);        }finally {            if (jedis != null){                jedis.close();            }        }        return isMember;    }     /**     * 返回set集合的长度     * @param key key     * @return     */    public static Long scard(String key){        Jedis jedis = null;        Long len = 0L;        try {            jedis = getJedis();            len = jedis.scard(key);        }finally {            if (jedis != null){                jedis.close();            }        }        return len;    }     /**     * 删除set集合中指定的一个或多个元素     * @param key     * @param members 要删除的元素     * @return 删除成功的元素个数     */    public static Long srem(String key,String... members){        Jedis jedis = null;        Long num = 0L;        try {            jedis = getJedis();            num = jedis.srem(key,members);        }finally {            if (jedis != null){                jedis.close();            }        }        return num;    }     /**     * 将key1中的元素key1Member移动到key2中     * @param key1 来源集合key     * @param key2 目的地集合key     * @param key1Member key1中的元素     * @return 1成功,0失败     */    public static Long smove(String key1,String key2,String key1Member){        Jedis jedis = null;        Long num = 0L;        try {            jedis = getJedis();            num = jedis.smove(key1,key2,key1Member);        }finally {            if (jedis != null){                jedis.close();            }        }        return num;    }     /**     * 随机查询返回集合中的指定个数的元素(若count为负数,返回的元素可能会重复)     * @param key key     * @param count 要查询返回的元素个数     * @return 元素list集合     */    public static List<String> srandmember(String key,int count){        Jedis jedis = null;        List<String> members = null;        try {            jedis = getJedis();            members = jedis.srandmember(key,count);        }finally {            if (jedis != null){                jedis.close();            }        }        return members;    }     /**     * 从set集合中随机弹出指定个数个元素     * @param key key     * @param count 要弹出的个数     * @return 随机弹出的元素     */    public static Set<String> spop(String key,int count){        Jedis jedis = null;        Set<String> members = null;        try {            jedis = getJedis();            members = jedis.spop(key,count);        }finally {            if (jedis != null){                jedis.close();            }        }        return members;    }     /**     * 求交集,返回多个set集合相交的部分     * @param setKeys 多个set集合的key     * @return 相交的元素集合     */    public static Set<String> sinter(String... setKeys){        Jedis jedis = null;        Set<String> members = null;        try {            jedis = getJedis();            members = jedis.sinter(setKeys);        }finally {            if (jedis != null){                jedis.close();            }        }        return members;    }     /**     * 求并集,求几个set集合的并集(因为set中不会有重复的元素,合并后的集合也不会有重复的元素)     * @param setKeys 多个set的key     * @return 合并后的集合     */    public static Set<String> sunion(String... setKeys){        Jedis jedis = null;        Set<String> members = null;        try {            jedis = getJedis();            members = jedis.sunion(setKeys);        }finally {            if (jedis != null){                jedis.close();            }        }        return members;    }     /**     * 求差集,求几个集合之间的差集     * @param setKeys 多个set的key     * @return 差集     */    public static Set<String> sdiff(String... setKeys){        Jedis jedis = null;        Set<String> members = null;        try {            jedis = getJedis();            members = jedis.sdiff(setKeys);        }finally {            if (jedis != null){                jedis.close();            }        }        return members;    }      /*########################  zset(有序集合)的操作  #######################*/     /**     * 添加一个元素到zset     * @param key key     * @param score 元素的分数     * @param member 元素     * @return 成功添加的元素个数     */    public static Long zadd(String key,double score, String member){        Jedis jedis = null;        Long num = null;        try {            jedis = getJedis();            num = jedis.zadd(key,score,member);        }finally {            if (jedis != null){                jedis.close();            }        }        return num;    }}
文章源自JAVA秀-https://www.javaxiu.com/38126.html

文章源自JAVA秀-https://www.javaxiu.com/38126.html

1. SpringBoot 的@Value注解太强大了,用了都说爽!2. 面试官问:数据库 delete 表数据,磁盘空间还是被一直占用,为什么?3. Java 8 失宠!开发人员向 Java 11 转移...4. 实现数据“一键脱敏”,Sharding Sphere帮你搞定最近面试BAT,整理一份面试资料《Java面试BATJ通关手册》,覆盖了Java核心技术、JVM、Java并发、SSM、微服务、数据库、数据结构等等。获取方式:点“在看”,关注公众号并回复 Java 领取,更多内容陆续奉上。

文章有帮助的话,在看,转发吧。文章源自JAVA秀-https://www.javaxiu.com/38126.html

谢谢支持哟 (*^__^*)文章源自JAVA秀-https://www.javaxiu.com/38126.html

继续阅读
速蛙云 - 极致体验,强烈推荐!!!购买套餐就免费送各大视频网站会员!快速稳定、独家福利社、流媒体稳定解锁!速度快,全球上网、视频、游戏加速、独立IP均支持!基础套餐性价比很高!这里不多说,我一直正在使用,推荐购买:https://www.javaxiu.com/59919.html
weinxin
资源分享QQ群
本站是JAVA秀团队的技术分享社区, 会经常分享资源和教程; 分享的时代, 请别再沉默!
沙海
匿名

发表评论

匿名网友 填写信息

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定