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  • redis 详解二

    pom

    <!-- Redis 官方提供的 Java 驱动 -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
        
        <!-- Spring 对 Redis 的封装 -->
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>1.8.6.RELEASE</version>
        </dependency>
        
        <!-- Java 与 JSON 的相互转换 -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.8</version>
        </dependency>

    Redis 数据结构简介

    Redis可以存储键与5种不同数据结构类型之间的映射,这5种数据结构类型分别为String(字符串)、List(列表)、Set(集合)、Hash(散列)和 Zset(有序集合)。

    下面来对这5种数据结构类型作简单的介绍:

    Redis 5种数据结构的概念大致介绍到这边,下面将结合Spring封装的RedisTemplate来对这5种数据结构的运用进行演示

    RedisTemplate介绍

    Spring封装了RedisTemplate对象来进行对Redis的各种操作,它支持所有的Redis原生的api。RedisTemplate位于spring-data-redis包下。

    RedisTemplate中定义了对5种数据结构操作

    redisTemplate.opsForValue();//操作字符串
    
    redisTemplate.opsForHash();//操作hash
    
    redisTemplate.opsForList();//操作list
    
    redisTemplate.opsForSet();//操作set
    
    redisTemplate.opsForZSet();//操作有序set

    StringRedisTemplate与RedisTemplate

    • 两者的关系是StringRedisTemplate继承RedisTemplate。

    • 两者的数据是不共通的;也就是说StringRedisTemplate只能管理StringRedisTemplate里面的数据,RedisTemplate只能管理RedisTemplate中的数据。

    • SDR默认采用的序列化策略有两种,一种是String的序列化策略,一种是JDK的序列化策略。

      StringRedisTemplate默认采用的是String的序列化策略,保存的key和value都是采用此策略序列化保存的。

      RedisTemplate默认采用的是JDK的序列化策略,保存的key和value都是采用此策略序列化保存的。

    RedisConf配置如下:

    package com.guige.core.conf;
    
    import com.guige.core.ext.common.redis.MyCacheErrorHandler;
    import com.guige.core.ext.common.redis.MyKeyGenerator;
    import com.guige.core.ext.common.redis.MyRedisCacheManager;
    import com.guige.core.ext.common.redis.MyRedisTemplate;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.cache.interceptor.CacheErrorHandler;
    import org.springframework.cache.interceptor.KeyGenerator;
    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.jedis.JedisConnectionFactory;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.stereotype.Component;
    import redis.clients.jedis.JedisPoolConfig;
    
    /**
     * TODO
     *
     * @author songaw
     * @date 2018/7/17 11:29
     */
    @Component
    @Configuration
    public class RedisConf {
        @Value("${spring.redis.database}")
        private Integer database;
    
        @Value("${spring.redis.host}")
        private String host;
    
        @Value("${spring.redis.password}")
        private String password;
    
        @Value("${spring.redis.port}")
        private Integer port;
    
        @Value("${spring.redis.timeout}")
        private Integer timeout;
    
        @Value(value = "${spring.redis.expire:300}")
        private Integer expiration;
    
        @Value("${spring.redis.pool.maxactive}")
        private int maxActive;
    
        @Value("${spring.redis.pool.minidle}")
        private int minIdle;
    
        @Value("${spring.redis.pool.maxidle}")
        private int maxIdle;
    
        @Bean
        public JedisPoolConfig jedisPoolConfig(){
            JedisPoolConfig poolConfig = new JedisPoolConfig();
            poolConfig.setMaxIdle(this.maxIdle);
            poolConfig.setMinIdle(this.minIdle);
            poolConfig.setTestOnCreate(true);
            poolConfig.setTestOnBorrow(true);
            poolConfig.setTestOnReturn(true);
            poolConfig.setTestWhileIdle(true);
            return poolConfig;
        }
        @Bean
        public JedisConnectionFactory jedisConnectionFactory(){
            JedisPoolConfig config = jedisPoolConfig();
            JedisConnectionFactory jedisConnectionFactory = new JedisConnectionFactory(config);
            jedisConnectionFactory.setDatabase(this.database);
            jedisConnectionFactory.setHostName(this.host);
            jedisConnectionFactory.setPassword(this.password);
            jedisConnectionFactory.setPort(this.port);
            jedisConnectionFactory.setTimeout(this.timeout);
            return jedisConnectionFactory;
        }
        @Bean
       public  RedisTemplate redisTemplate(){
            MyRedisTemplate myRedisTemplate = new MyRedisTemplate();
            myRedisTemplate.setConnectionFactory(jedisConnectionFactory());
            return myRedisTemplate;
        }
        public RedisCacheManager redisCacheManager(){
            MyRedisCacheManager myRedisCacheManager = new MyRedisCacheManager(redisTemplate());
            return myRedisCacheManager;
        }
        @Bean
        public CacheErrorHandler cacheErrorHandler(){
            MyCacheErrorHandler myCacheErrorHandler = new MyCacheErrorHandler();
            return myCacheErrorHandler;
        }
        @Bean
        KeyGenerator keyGenerator(){
            MyKeyGenerator myKeyGenerator = new MyKeyGenerator();
            return myKeyGenerator;
        }
    }

    Redis的String数据结构 (推荐使用StringRedisTemplate)

    public interface ValueOperations<K,V>
    
    ValueOperations可以对String数据结构进行操作:
    
    ---------------------------------------------------------------------------------------------------------------
    
    
    set void set(K key, V value);
    使用:redisTemplate.opsForValue().set("name","tom");
    结果:redisTemplate.opsForValue().get("name")  输出结果为tom
    
    ---------------------------------------------------------------------------------------------------------------
    
    
    set void set(K key, V value, long timeout, TimeUnit unit);
    
    使用:redisTemplate.opsForValue().set("name","tom",10, TimeUnit.SECONDS);
    结果:redisTemplate.opsForValue().get("name")由于设置的是10秒失效,十秒之内查询有结果,十秒之后返回为null
    
    ---------------------------------------------------------------------------------------------------------------
    
    
    set void set(K key, V value, long offset);
    该方法是用 value 参数覆写(overwrite)给定 key 所储存的字符串值,从偏移量 offset 开始
    使用:template.opsForValue().set("key","hello world");
          template.opsForValue().set("key","redis", 6);
          System.out.println("***************"+template.opsForValue().get("key"));
    结果:***************hello redis
    ---------------------------------------------------------------------------------------------------------------
    
    
    setIfAbsent Boolean setIfAbsent(K key, V value);
    使用:System.out.println(template.opsForValue().setIfAbsent("multi1","multi1"));//false  multi1之前已经存在
            System.out.println(template.opsForValue().setIfAbsent("multi111","multi111"));//true  multi111之前不存在
    结果:false
    true
    ---------------------------------------------------------------------------------------------------------------
    
    multiSet void multiSet(Map<? extends K, ? extends V> m);
    为多个键分别设置它们的值
     multiSet void multiSet(Map<? extends K, ? extends V> m);
     使用:
            Map<String,String> maps = new HashMap<String, String>();
            maps.put("multi1","multi1");
            maps.put("multi2","multi2");
            maps.put("multi3","multi3");
            template.opsForValue().multiSet(maps);
            List<String> keys = new ArrayList<String>();
            keys.add("multi1");
            keys.add("multi2");
            keys.add("multi3");
            System.out.println(template.opsForValue().multiGet(keys));
    结果:
            [multi1, multi2, multi3]
    ---------------------------------------------------------------------------------------------------------------
    
    get V get(Object key);
    使用:template.opsForValue().set("key","hello world");
          System.out.println("***************"+template.opsForValue().get("key"));
    结果:***************hello world
    
    ---------------------------------------------------------------------------------------------------------------
    getAndSet V getAndSet(K key, V value);
    设置键的字符串值并返回其旧值
    使用:template.opsForValue().set("getSetTest","test");
          System.out.println(template.opsForValue().getAndSet("getSetTest","test2"));
    结果:test
    ---------------------------------------------------------------------------------------------------------------
    
    multiGet List<V> multiGet(Collection<K> keys);
    为多个键分别取出它们的值
    使用:Map<String,String> maps = new HashMap<String, String>();
          maps.put("multi1","multi1");
          maps.put("multi2","multi2");
          maps.put("multi3","multi3");
          template.opsForValue().multiSet(maps);
          List<String> keys = new ArrayList<String>();
          keys.add("multi1");
          keys.add("multi2");
          keys.add("multi3");
          System.out.println(template.opsForValue().multiGet(keys));
    结果:[multi1, multi2, multi3]
    ---------------------------------------------------------------------------------------------------------------
    
    increment Long increment(K key, long delta);
    支持整数
    使用:template.opsForValue().increment("increlong",1);
          System.out.println("***************"+template.opsForValue().get("increlong"));
    结果:***************1
    ---------------------------------------------------------------------------------------------------------------
    increment Double increment(K key, double delta);
    也支持浮点数
    使用:template.opsForValue().increment("increlong",1.2);
          System.out.println("***************"+template.opsForValue().get("increlong"));
    结果:***************2.2
    ---------------------------------------------------------------------------------------------------------------
    append Integer append(K key, String value);
    
    如果key已经存在并且是一个字符串,则该命令将该值追加到字符串的末尾。如果键不存在,则它被创建并设置为空字符串,因此APPEND在这种特殊情况下将类似于SET。
    使用:template.opsForValue().append("appendTest","Hello");
          System.out.println(template.opsForValue().get("appendTest"));
          template.opsForValue().append("appendTest","world");
          System.out.println(template.opsForValue().get("appendTest"));
    结果:Hello
          Helloworld
    ---------------------------------------------------------------------------------------------------------------
    get String get(K key, long start, long end);
    截取key所对应的value字符串
    使用:appendTest对应的value为Helloworld
    System.out.println("*********"+template.opsForValue().get("appendTest",0,5));
    结果:*********Hellow
    使用:System.out.println("*********"+template.opsForValue().get("appendTest",0,-1));
    结果:*********Helloworld
    使用:System.out.println("*********"+template.opsForValue().get("appendTest",-3,-1));
    结果:*********rld
    ---------------------------------------------------------------------------------------------------------------
    size Long size(K key);
    返回key所对应的value值得长度
    
    使用:template.opsForValue().set("key","hello world");
      System.out.println("***************"+template.opsForValue().size("key"));
    结果:***************11
    
    ---------------------------------------------------------------------------------------------------------------
    
    
    setBit Boolean setBit(K key, long offset, boolean value);
    对 key 所储存的字符串值,设置或清除指定偏移量上的位(bit)
    key键对应的值value对应的ascii码,在offset的位置(从左向右数)变为value
    
    使用:template.opsForValue().set("bitTest","a");
          // 'a' 的ASCII码是 97。转换为二进制是:01100001
          // 'b' 的ASCII码是 98  转换为二进制是:01100010
          // 'c' 的ASCII码是 99  转换为二进制是:01100011
          //因为二进制只有0和1,在setbit中true为1,false为0,因此我要变为'b'的话第六位设置为1,第七位设置为0
          template.opsForValue().setBit("bitTest",6, true);
          template.opsForValue().setBit("bitTest",7, false);
          System.out.println(template.opsForValue().get("bitTest"));
    结果:b
    ---------------------------------------------------------------------------------------------------------------
    getBit Boolean getBit(K key, long offset);
    获取键对应值的ascii码的在offset处位值
    
    使用:System.out.println(template.opsForValue().getBit("bitTest",7));
    结果:false
    View Code

    Redis的List数据结构

    public interface ListOperations<K,V>
    
    Redis列表是简单的字符串列表,按照插入顺序排序。你可以添加一个元素导列表的头部(左边)或者尾部(右边)
    
    ListOperations专门操作list列表:
    
    ---------------------------------------------------------------------------------------------------------------
    List<V> range(K key, long start, long end);
    
    返回存储在键中的列表的指定元素。偏移开始和停止是基于零的索引,其中0是列表的第一个元素(列表的头部),1是下一个元素
    
    使用:System.out.println(template.opsForList().range("list",0,-1));
    结果:[c#, c++, python, java, c#, c#]
    
    ---------------------------------------------------------------------------------------------------------------
    void trim(K key, long start, long end);
    修剪现有列表,使其只包含指定的指定范围的元素,起始和停止都是基于0的索引
    
    使用:
    System.out.println(template.opsForList().range("list",0,-1));
    
    template.opsForList().trim("list",1,-1);//裁剪第一个元素
    System.out.println(template.opsForList().range("list",0,-1));
    
    结果:[c#, c++, python, java, c#, c#]
    [c++, python, java, c#, c#]
    ---------------------------------------------------------------------------------------------------------------
    
    Long size(K key);
    
    返回存储在键中的列表的长度。如果键不存在,则将其解释为空列表,并返回0。当key存储的值不是列表时返回错误。
    使用:System.out.println(template.opsForList().size("list"));
    结果:6
    
    ---------------------------------------------------------------------------------------------------------------
    
    Long leftPush(K key, V value);
    
    将所有指定的值插入存储在键的列表的头部。如果键不存在,则在执行推送操作之前将其创建为空列表。(从左边插入)
    
    使用:template.opsForList().leftPush("list","java");
          template.opsForList().leftPush("list","python");
          template.opsForList().leftPush("list","c++");
    结果:返回的结果为推送操作后的列表的长度
    1
    2
    3
    ---------------------------------------------------------------------------------------------------------------
    
    Long leftPushAll(K key, V... values);
    
    批量把一个数组插入到列表中
    使用:String[] stringarrays = new String[]{"1","2","3"};
          template.opsForList().leftPushAll("listarray",stringarrays);
          System.out.println(template.opsForList().range("listarray",0,-1));
    结果:[3, 2, 1]
    
    ---------------------------------------------------------------------------------------------------------------
    Long leftPushAll(K key, Collection<V> values);
    
    批量把一个集合插入到列表中
    
    使用:List<Object> strings = new ArrayList<Object>();
          strings.add("1");
          strings.add("2");
          strings.add("3");
          template.opsForList().leftPushAll("listcollection4", strings);
          System.out.println(template.opsForList().range("listcollection4",0,-1));
    结果:[3, 2, 1]
    
    ---------------------------------------------------------------------------------------------------------------
    Long leftPushIfPresent(K key, V value);
    
    只有存在key对应的列表才能将这个value值插入到key所对应的列表中
    
    使用:System.out.println(template.opsForList().leftPushIfPresent("leftPushIfPresent","aa"));
          System.out.println(template.opsForList().leftPushIfPresent("leftPushIfPresent","bb"));
    ==========分割线===========
    System.out.println(template.opsForList().leftPush("leftPushIfPresent","aa"));
          System.out.println(template.opsForList().leftPushIfPresent("leftPushIfPresent","bb"));
    结果:
    0
    0
    ==========分割线===========
    1
    2
    ---------------------------------------------------------------------------------------------------------------
    Long leftPush(K key, V pivot, V value);
    
    把value值放到key对应列表中pivot值的左面,如果pivot值存在的话
    
    使用:template.opsForList().leftPush("list","java","oc");
          System.out.print(template.opsForList().range("list",0,-1));
    结果:[c++, python, oc, java, c#, c#]
    
    ---------------------------------------------------------------------------------------------------------------
    Long rightPush(K key, V value);
    将所有指定的值插入存储在键的列表的头部。如果键不存在,则在执行推送操作之前将其创建为空列表。(从右边插入)
    
    使用:template.opsForList().rightPush("listRight","java");
          template.opsForList().rightPush("listRight","python");
          template.opsForList().rightPush("listRight","c++");
    结果:
    1
    2
    3
    ---------------------------------------------------------------------------------------------------------------
    Long rightPushAll(K key, V... values);
    
    使用:String[] stringarrays = new String[]{"1","2","3"};
          template.opsForList().rightPushAll("listarrayright",stringarrays);
          System.out.println(template.opsForList().range("listarrayright",0,-1));
    结果:[1, 2, 3]
    
    ---------------------------------------------------------------------------------------------------------------
    Long rightPushAll(K key, Collection<V> values);
    
    使用:List<Object> strings = new ArrayList<Object>();
          strings.add("1");
          strings.add("2");
          strings.add("3");
          template.opsForList().rightPushAll("listcollectionright", strings);
          System.out.println(template.opsForList().range("listcollectionright",0,-1));
    结果:[1, 2, 3]
    ---------------------------------------------------------------------------------------------------------------
    
    Long rightPushIfPresent(K key, V value);
    只有存在key对应的列表才能将这个value值插入到key所对应的列表中
    
    使用:System.out.println(template.opsForList().rightPushIfPresent("rightPushIfPresent","aa"));
          System.out.println(template.opsForList().rightPushIfPresent("rightPushIfPresent","bb"));
          System.out.println("==========分割线===========");
          System.out.println(template.opsForList().rightPush("rightPushIfPresent","aa"));
          System.out.println(template.opsForList().rightPushIfPresent("rightPushIfPresent","bb"));
    结果:0
    0
    ==========分割线===========
    1
    2
    ---------------------------------------------------------------------------------------------------------------
    
    Long rightPush(K key, V pivot, V value);
    把value值放到key对应列表中pivot值的右面,如果pivot值存在的话
    
    使用:System.out.println(template.opsForList().range("listRight",0,-1));
          template.opsForList().rightPush("listRight","python","oc");
          System.out.println(template.opsForList().range("listRight",0,-1));
    结果:[java, python, c++]
    [java, python, oc, c++]
    
    ---------------------------------------------------------------------------------------------------------------
    
    void set(K key, long index, V value);
    在列表中index的位置设置value值
    
    使用:System.out.println(template.opsForList().range("listRight",0,-1));
          template.opsForList().set("listRight",1,"setValue");
          System.out.println(template.opsForList().range("listRight",0,-1));
    结果:[java, python, oc, c++]
    [java, setValue, oc, c++]
    
    ---------------------------------------------------------------------------------------------------------------
    
    Long remove(K key, long count, Object value);
    从存储在键中的列表中删除等于值的元素的第一个计数事件。
    计数参数以下列方式影响操作:
    count> 0:删除等于从头到尾移动的值的元素。
    count <0:删除等于从尾到头移动的值的元素。
    count = 0:删除等于value的所有元素。
    
    使用:System.out.println(template.opsForList().range("listRight",0,-1));
          template.opsForList().remove("listRight",1,"setValue");//将删除列表中存储的列表中第一次次出现的“setValue”。
          System.out.println(template.opsForList().range("listRight",0,-1));
    结果:[java, setValue, oc, c++]
    [java, oc, c++]
    ---------------------------------------------------------------------------------------------------------------
    
    V index(K key, long index);
    根据下表获取列表中的值,下标是从0开始的
    
    使用:System.out.println(template.opsForList().range("listRight",0,-1));
    System.out.println(template.opsForList().index("listRight",2));
    结果:[java, oc, c++]
    c++
    
    ---------------------------------------------------------------------------------------------------------------
    
    V leftPop(K key);
    弹出最左边的元素,弹出之后该值在列表中将不复存在
    
    使用:System.out.println(template.opsForList().range("list",0,-1));
          System.out.println(template.opsForList().leftPop("list"));
          System.out.println(template.opsForList().range("list",0,-1));
    结果:
    [c++, python, oc, java, c#, c#]
    c++
    [python, oc, java, c#, c#]
    
    ---------------------------------------------------------------------------------------------------------------
    V leftPop(K key, long timeout, TimeUnit unit);
    移出并获取列表的第一个元素, 如果列表没有元素会阻塞列表直到等待超时或发现可弹出元素为止。
    
    使用:用法与 leftPop(K key);一样
    
    ---------------------------------------------------------------------------------------------------------------
    
    V rightPop(K key);
    
    弹出最右边的元素,弹出之后该值在列表中将不复存在
    
    使用:    System.out.println(template.opsForList().range("list",0,-1));
          System.out.println(template.opsForList().rightPop("list"));
          System.out.println(template.opsForList().range("list",0,-1));
    结果:[python, oc, java, c#, c#]
    c#
    [python, oc, java, c#]
    ---------------------------------------------------------------------------------------------------------------
    V rightPop(K key, long timeout, TimeUnit unit);
    移出并获取列表的最后一个元素, 如果列表没有元素会阻塞列表直到等待超时或发现可弹出元素为止。
    
    
    使用:用法与 rightPop(K key);一样
    
    ---------------------------------------------------------------------------------------------------------------
    
    V rightPopAndLeftPush(K sourceKey, K destinationKey);
    用于移除列表的最后一个元素,并将该元素添加到另一个列表并返回。
    
    使用:System.out.println(template.opsForList().range("list",0,-1));
    template.opsForList().rightPopAndLeftPush("list","rightPopAndLeftPush");
      System.out.println(template.opsForList().range("list",0,-1));
      System.out.println(template.opsForList().range("rightPopAndLeftPush",0,-1));
    结果:[oc, java,c#]
    [oc, java]
    [c#]
    
    ---------------------------------------------------------------------------------------------------------------
    
    V rightPopAndLeftPush(K sourceKey, K destinationKey, long timeout, TimeUnit unit);
    
    
    用于移除列表的最后一个元素,并将该元素添加到另一个列表并返回,如果列表没有元素会阻塞列表直到等待超时或发现可弹出元素为止。
    
    使用:用法与rightPopAndLeftPush(K sourceKey, K destinationKey)一样
    View Code

    Redis的Hash数据机构(Redis的散列可以让用户将多个键值对存储到一个Redis键里面)

    public interface HashOperations<H,HK,HV>
    HashOperations提供一系列方法操作hash:
    
    ---------------------------------------------------------------------------------------------------------------
    
    初始数据:
    template.opsForHash().put("redisHash","name","tom");
    template.opsForHash().put("redisHash","age",26);
    template.opsForHash().put("redisHash","class","6");
    
    Map<String,Object> testMap = new HashMap();
    testMap.put("name","jack");
    testMap.put("age",27);
    testMap.put("class","1");
    template.opsForHash().putAll("redisHash1",testMap);
    
    ---------------------------------------------------------------------------------------------------------------
    
    Long delete(H key, Object... hashKeys);
    删除给定的哈希hashKeys
    使用:System.out.println(template.opsForHash().delete("redisHash","name"));
          System.out.println(template.opsForHash().entries("redisHash"));
    结果:1
    {class=6, age=28.1}
    ---------------------------------------------------------------------------------------------------------------
    
    Boolean hasKey(H key, Object hashKey);
    确定哈希hashKey是否存在
    
    使用:System.out.println(template.opsForHash().hasKey("redisHash","age"));
          System.out.println(template.opsForHash().hasKey("redisHash","ttt"));
    结果:true
    false
    ---------------------------------------------------------------------------------------------------------------
    
    HV get(H key, Object hashKey);
    从键中的哈希获取给定hashKey的值
    
    使用:System.out.println(template.opsForHash().get("redisHash","age"));
    结果:26
    ---------------------------------------------------------------------------------------------------------------
    
    List<HV> multiGet(H key, Collection<HK> hashKeys);
    从哈希中获取给定hashKey的值
    
    使用:List<Object> kes = new ArrayList<Object>();
          kes.add("name");
          kes.add("age");
          System.out.println(template.opsForHash().multiGet("redisHash",kes));
    结果:[jack, 28.1]
    
    ---------------------------------------------------------------------------------------------------------------
    
    Long increment(H key, HK hashKey, long delta);
    
    通过给定的delta增加散列hashKey的值(整型)
    
    使用:System.out.println(template.opsForHash().get("redisHash","age"));
      System.out.println(template.opsForHash().increment("redisHash","age",1));
    结果:26
    27
    
    ---------------------------------------------------------------------------------------------------------------
    
    Double increment(H key, HK hashKey, double delta);
    通过给定的delta增加散列hashKey的值(浮点数)
    
    使用:System.out.println(template.opsForHash().get("redisHash","age"));
      System.out.println(template.opsForHash().increment("redisHash","age",1.1));
    结果:27
    28.1
    ---------------------------------------------------------------------------------------------------------------
    
    Set<HK> keys(H key);
    获取key所对应的散列表的key
    
    使用:System.out.println(template.opsForHash().keys("redisHash1"));
    //redisHash1所对应的散列表为{class=1, name=jack, age=27}
    结果:[name, class, age]
    
    ---------------------------------------------------------------------------------------------------------------
    
    Long size(H key);
    获取key所对应的散列表的大小个数
    使用:System.out.println(template.opsForHash().size("redisHash1"));
    //redisHash1所对应的散列表为{class=1, name=jack, age=27}
    结果:3
    ---------------------------------------------------------------------------------------------------------------
    
    void putAll(H key, Map<? extends HK, ? extends HV> m);
    使用m中提供的多个散列字段设置到key对应的散列表中
    
    使用:Map<String,Object> testMap = new HashMap();
          testMap.put("name","jack");
          testMap.put("age",27);
          testMap.put("class","1");
          template.opsForHash().putAll("redisHash1",testMap);
          System.out.println(template.opsForHash().entries("redisHash1"));
    结果:{class=1, name=jack, age=27}
    
    ---------------------------------------------------------------------------------------------------------------
    
    void put(H key, HK hashKey, HV value);
    设置散列hashKey的值
    使用:template.opsForHash().put("redisHash","name","tom");
          template.opsForHash().put("redisHash","age",26);
          template.opsForHash().put("redisHash","class","6");
    System.out.println(template.opsForHash().entries("redisHash"));
    结果:{age=26, class="6", name=tom}
    
    ---------------------------------------------------------------------------------------------------------------
    
    Boolean putIfAbsent(H key, HK hashKey, HV value);
    仅当hashKey不存在时才设置散列hashKey的值。
    
    使用:System.out.println(template.opsForHash().putIfAbsent("redisHash","age",30));
    System.out.println(template.opsForHash().putIfAbsent("redisHash","kkk","kkk"));
    
    结果:false
    true
    ---------------------------------------------------------------------------------------------------------------
    List<HV> values(H key);
    获取整个哈希存储的值根据密钥
    
    使用:System.out.println(template.opsForHash().values("redisHash"));
    结果:[tom, 26, 6]
    ---------------------------------------------------------------------------------------------------------------
    
    Map<HK, HV> entries(H key);
    获取整个哈希存储根据密钥
    使用:System.out.println(template.opsForHash().entries("redisHash"));
    结果:{age=26, class="6", name=tom}
    
    ---------------------------------------------------------------------------------------------------------------
    Cursor<Map.Entry<HK, HV>> scan(H key, ScanOptions options);
    使用Cursor在key的hash中迭代,相当于迭代器。
    
    使用:Cursor<Map.Entry<Object, Object>> curosr = template.opsForHash().scan("redisHash", ScanOptions.ScanOptions.NONE);
          while(curosr.hasNext()){
              Map.Entry<Object, Object> entry = curosr.next();
              System.out.println(entry.getKey()+":"+entry.getValue());
          }
    结果:age:28.1
    class:6
    kkk:kkk
    View Code

    Redis的Set数据结构

    Redis的Set是string类型的无序集合。集合成员是唯一的,这就意味着集合中不能出现重复的数据。

    Redis 中 集合是通过哈希表实现的,所以添加,删除,查找的复杂度都是O(1)。

    public interface SetOperations<K,V>
    SetOperations提供了对无序集合的一系列操作:
    ---------------------------------------------------------------------------------------------------------------Long add(K key, V... values);无序集合中添加元素,返回添加个数也可以直接在add里面添加多个值 如:template.opsForSet().add("setTest","aaa","bbb")
    使用:String[] strarrays = new String[]{"strarr1","sgtarr2"};
          System.out.println(template.opsForSet().add("setTest", strarrays));
    结果:2
    ---------------------------------------------------------------------------------------------------------------Long remove(K key, Object... values);移除集合中一个或多个成员
    使用:String[] strarrays = new String[]{"strarr1","sgtarr2"};
    System.out.println(template.opsForSet().remove("setTest",strarrays));
    结果:2
    ---------------------------------------------------------------------------------------------------------------V pop(K key);移除并返回集合中的一个随机元素
    使用:System.out.println(template.opsForSet().pop("setTest"));
    System.out.println(template.opsForSet().members("setTest"));
    结果:bbb
    [aaa, ccc]
    
    ---------------------------------------------------------------------------------------------------------------
    Boolean move(K key, V value, K destKey);将 member 元素从 source 集合移动到 destination 集合
    使用:template.opsForSet().move("setTest","aaa","setTest2");
          System.out.println(template.opsForSet().members("setTest"));
          System.out.println(template.opsForSet().members("setTest2"));
    结果:[ccc]
    [aaa]
    ---------------------------------------------------------------------------------------------------------------Long size(K key);无序集合的大小长度
    使用:System.out.println(template.opsForSet().size("setTest"));
    结果:1
    
    ---------------------------------------------------------------------------------------------------------------Boolean isMember(K key, Object o);判断 member 元素是否是集合 key 的成员
    使用:System.out.println(template.opsForSet().isMember("setTest","ccc"));
          System.out.println(template.opsForSet().isMember("setTest","asd"));
    结果:true
    false---------------------------------------------------------------------------------------------------------------Set<V> intersect(K key, K otherKey);
    key对应的无序集合与otherKey对应的无序集合求交集
    使用:System.out.println(template.opsForSet().members("setTest"));
          System.out.println(template.opsForSet().members("setTest2"));
          System.out.println(template.opsForSet().intersect("setTest","setTest2"));
    结果:[aaa, ccc]
    [aaa]
    [aaa]
    ---------------------------------------------------------------------------------------------------------------
    Set<V> intersect(K key, Collection<K> otherKeys);key对应的无序集合与多个otherKey对应的无序集合求交集
    使用:System.out.println(template.opsForSet().members("setTest"));
            System.out.println(template.opsForSet().members("setTest2"));
            System.out.println(template.opsForSet().members("setTest3"));
            List<String> strlist = new ArrayList<String>();
            strlist.add("setTest2");
            strlist.add("setTest3");
            System.out.println(template.opsForSet().intersect("setTest",strlist));
    结果:[aaa, ccc]
    [aaa]
    [ccc, aaa]
    [aaa]
     
    ---------------------------------------------------------------------------------------------------------------Long intersectAndStore(K key, K otherKey, K destKey);key无序集合与otherkey无序集合的交集存储到destKey无序集合中
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
    System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
    System.out.println(template.opsForSet().intersectAndStore("setTest","setTest2","destKey1"));
    System.out.println(template.opsForSet().members("destKey1"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    2
    [aaa, ccc]---------------------------------------------------------------------------------------------------------------Long intersectAndStore(K key, Collection<K> otherKeys, K destKey);key对应的无序集合与多个otherKey对应的无序集合求交集存储到destKey无序集合中
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println("setTest3:" + template.opsForSet().members("setTest3"));
          List<String> strlist = new ArrayList<String>();
          strlist.add("setTest2");
          strlist.add("setTest3");
          System.out.println(template.opsForSet().intersectAndStore("setTest",strlist,"destKey2"));
          System.out.println(template.opsForSet().members("destKey2"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    setTest3:[ccc, aaa]
    2
    [aaa, ccc]
    ---------------------------------------------------------------------------------------------------------------Long unionAndStore(K key, K otherKey, K destKey);key无序集合与otherkey无序集合的并集存储到destKey无序集合中
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println(template.opsForSet().unionAndStore("setTest","setTest2","unionAndStoreTest1"));
          System.out.println("unionAndStoreTest1:" + template.opsForSet().members("unionAndStoreTest1"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    4
    unionAndStoreTest1:[ccc, aaa, ddd, bbb]
    ---------------------------------------------------------------------------------------------------------------Long unionAndStore(K key, Collection<K> otherKeys, K destKey);key无序集合与多个otherkey无序集合的并集存储到destKey无序集合中
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println("setTest3:" + template.opsForSet().members("setTest3"));
          List<String> strlist = new ArrayList<String>();
          strlist.add("setTest2");
          strlist.add("setTest3");
          System.out.println(template.opsForSet().unionAndStore("setTest",strlist,"unionAndStoreTest2"));
          System.out.println("unionAndStoreTest2:" + template.opsForSet().members("unionAndStoreTest2"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    setTest3:[xxx, ccc, aaa]
    5
    unionAndStoreTest2:[ddd, xxx, bbb, aaa, ccc]
    ---------------------------------------------------------------------------------------------------------------Set<V> difference(K key, K otherKey);key无序集合与otherKey无序集合的差集
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println(template.opsForSet().difference("setTest","setTest2"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    [bbb, ddd]
    ---------------------------------------------------------------------------------------------------------------Set<V> difference(K key, Collection<K> otherKeys);key无序集合与多个otherKey无序集合的差集
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println("setTest3:" + template.opsForSet().members("setTest3"));
          List<String> strlist = new ArrayList<String>();
          strlist.add("setTest2");
          strlist.add("setTest3");
          System.out.println(template.opsForSet().difference("setTest",strlist));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    setTest3:[xxx, ccc, aaa]
    [bbb, ddd]
    ---------------------------------------------------------------------------------------------------------------Long differenceAndStore(K key, K otherKey, K destKey);key无序集合与otherkey无序集合的差集存储到destKey无序集合中
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println(template.opsForSet().differenceAndStore("setTest","setTest2","differenceAndStore1"));
          System.out.println("differenceAndStore1:" + template.opsForSet().members("differenceAndStore1"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    2
    differenceAndStore1:[bbb, ddd]
    ---------------------------------------------------------------------------------------------------------------Long differenceAndStore(K key, Collection<K> otherKeys, K destKey);key无序集合与多个otherkey无序集合的差集存储到destKey无序集合中
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTest2:" + template.opsForSet().members("setTest2"));
          System.out.println("setTest3:" + template.opsForSet().members("setTest3"));
          List<String> strlist = new ArrayList<String>();
          strlist.add("setTest2");
          strlist.add("setTest3");
          System.out.println(template.opsForSet().differenceAndStore("setTest",strlist,"differenceAndStore2"));
          System.out.println("differenceAndStore2:" + template.opsForSet().members("differenceAndStore2"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTest2:[ccc, aaa]
    setTest3:[xxx, ccc, aaa]
    2
    differenceAndStore2:[bbb, ddd]
    ---------------------------------------------------------------------------------------------------------------Set<V> members(K key);
    返回集合中的所有成员
    使用:System.out.println(template.opsForSet().members("setTest"));
    结果:[ddd, bbb, aaa, ccc]
    ---------------------------------------------------------------------------------------------------------------V randomMember(K key);随机获取key无序集合中的一个元素
    使用:System.out.println("setTest:" + template.opsForSet().members("setTest"));
          System.out.println("setTestrandomMember:" + template.opsForSet().randomMember("setTest"));
          System.out.println("setTestrandomMember:" + template.opsForSet().randomMember("setTest"));
          System.out.println("setTestrandomMember:" + template.opsForSet().randomMember("setTest"));
          System.out.println("setTestrandomMember:" + template.opsForSet().randomMember("setTest"));
    结果:setTest:[ddd, bbb, aaa, ccc]
    setTestrandomMember:aaa
    setTestrandomMember:bbb
    setTestrandomMember:aaa
    setTestrandomMember:ddd
    ---------------------------------------------------------------------------------------------------------------Set<V> distinctRandomMembers(K key, long count);
    获取多个key无序集合中的元素(去重),count表示个数
    使用:System.out.println("randomMembers:" + template.opsForSet().distinctRandomMembers("setTest",5));
    结果:randomMembers:[aaa, bbb, ddd, ccc]
    ---------------------------------------------------------------------------------------------------------------
    List<V> randomMembers(K key, long count);获取多个key无序集合中的元素,count表示个数
    使用:System.out.println("randomMembers:" + template.opsForSet().randomMembers("setTest",5));
    结果:randomMembers:[ccc, ddd, ddd, ddd, aaa]
    ---------------------------------------------------------------------------------------------------------------
    Cursor<V> scan(K key, ScanOptions options);遍历set
    使用:    Cursor<Object> curosr = template.opsForSet().scan("setTest", ScanOptions.NONE);
          while(curosr.hasNext()){
              System.out.println(curosr.next());
          }
    结果:ddd
    bbb
    aaa
    ccc
    View Code
    故乡明
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  • 原文地址:https://www.cnblogs.com/luweiweicode/p/14251941.html
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