java加载redis以及基本操作
Redis 是一款开源的、高性能的键 - 值存储(key-value store)。它常被称作是一款数据结构服务器(data structure server)。Redis 的键值可以包括字符串(strings)类型,同时它还包括哈希(hashes)、列表(lists)、集合(sets)和 有序集合(sorted sets)等数据类型。 对于这些数据类型,你可以执行原子操作。例如:对字符串进行附加操作(append);递增哈希中的值;向列表中增加元素;计算集合的交集、并集与差集等。
为了获得优异的性能,Redis 采用了内存中(in-memory)数据集(dataset)的方式。同时,Redis 支持数据的持久化,你可以每隔一段时间将数据集转存到磁盘上(snapshot),或者在日志尾部追加每一条操作命令(append only file,aof)。
Redis 同样支持主从复制(master-slave replication),并且具有非常快速的非阻塞首次同步( non-blocking first synchronization)、网络断开自动重连等功能。同时 Redis 还具有其它一些特性,其中包括简单的事物支持、发布订阅 ( pub/sub)、管道(pipeline)和虚拟内存(vm)等 。
Redis 具有丰富的客户端,支持现阶段流行的大多数编程语言。
项目中使用 redis 后,在数据加载方面,当第一次查询时存入 redis,数据改变时会先更新 redis 中的数据,而后对数据库进行操作,redis 会占用本地运行内存,因此当数据以后加载时省略查询数据库的途径,直接从运行内存中加载数据,时间上会缩短很多,但是当 redis 服务关闭时,所有数据也会消失,不过 redis 也有持久化功能可以解决瞬时化。
一,redis 关系型数据库的下载配置和安装
下载 redis 网址:https://github.com/redis/jedis/releases?page=1
几个 exe 程序的功能:
redis-benchmark.exe:性能测试,用以模拟同时由 N 个客户端发送 M 个 SETs/GETs 查询 (类似于 Apache 的 ab 工具).
redis-check-aof.exe:更新日志检查
redis-check-dump.exe:本地数据库检查
redis-server.exe:服务端
首先打开 redis-server.exe:服务端,
再打开 redis-cli.exe:客户端 (顺序不可颠倒, redis-server.exe:服务端不可关闭),
二,java 连接 redis,实现功能如下:
1. 键空间通知(keyspace notification)
2. 事务(transaction)
3. 发布与订阅(pub/sub)
4. 复制(Replication)
5. 通信协议(protocol)
6. 持久化(persistence)
7.Sentinel
8. 集群
三,项目结构
1. 项目 jar 包如下:
2. 主要类
(1)功能类
package com.redis;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.JedisShardInfo;
import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;
import redis.clients.jedis.SortingParams;
/**
* 池的配置与连接
* 函数的使用
* @author xutao
*2018 年 12 月 21 日
*/
public class RedisClient {
<span style="color: rgba(0, 0, 255, 1)">private Jedis jedis;<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">非切片额客户端连接
<span style="color: rgba(0, 0, 255, 1)">private JedisPool jedisPool;<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">非切片连接池
<span style="color: rgba(0, 0, 255, 1)">private ShardedJedis shardedJedis;<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">切片额客户端连接
<span style="color: rgba(0, 0, 255, 1)">private ShardedJedisPool shardedJedisPool;<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">切片连接池
<span style="color: rgba(0, 0, 255, 1)">public<span style="color: rgba(0, 0, 0, 1)"> RedisClient()
{
initialPool();
initialShardedPool();
shardedJedis =<span style="color: rgba(0, 0, 0, 1)"> shardedJedisPool.getResource();
jedis =<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
}
<span style="color: rgba(0, 128, 0, 1)">/**<span style="color: rgba(0, 128, 0, 1)">
* 初始化非切片池
<span style="color: rgba(0, 128, 0, 1)">*/
<span style="color: rgba(0, 0, 255, 1)">private <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> initialPool()
{
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 池基本配置
JedisPoolConfig config = <span style="color: rgba(0, 0, 255, 1)">new<span style="color: rgba(0, 0, 0, 1)"> JedisPoolConfig();
config.setMaxActive(20<span style="color: rgba(0, 0, 0, 1)">);
config.setMaxIdle(5<span style="color: rgba(0, 0, 0, 1)">);
config.setMaxWait(1000l<span style="color: rgba(0, 0, 0, 1)">);
config.setTestOnBorrow(<span style="color: rgba(0, 0, 255, 1)">false<span style="color: rgba(0, 0, 0, 1)">);
jedisPool = <span style="color: rgba(0, 0, 255, 1)">new JedisPool(config,"127.0.0.1",6379<span style="color: rgba(0, 0, 0, 1)">);
}
<span style="color: rgba(0, 128, 0, 1)">/**<span style="color: rgba(0, 128, 0, 1)">
* 初始化切片池
<span style="color: rgba(0, 128, 0, 1)">*/
<span style="color: rgba(0, 0, 255, 1)">private <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> initialShardedPool()
{
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 池基本配置
JedisPoolConfig config = <span style="color: rgba(0, 0, 255, 1)">new<span style="color: rgba(0, 0, 0, 1)"> JedisPoolConfig();
config.setMaxActive(20<span style="color: rgba(0, 0, 0, 1)">);
config.setMaxIdle(5<span style="color: rgba(0, 0, 0, 1)">);
config.setMaxWait(1000l<span style="color: rgba(0, 0, 0, 1)">);
config.setTestOnBorrow(<span style="color: rgba(0, 0, 255, 1)">false<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> slave链接
List<JedisShardInfo> shards = <span style="color: rgba(0, 0, 255, 1)">new ArrayList<JedisShardInfo><span style="color: rgba(0, 0, 0, 1)">();
shards.add(<span style="color: rgba(0, 0, 255, 1)">new JedisShardInfo("127.0.0.1", 6379<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 构造池
shardedJedisPool = <span style="color: rgba(0, 0, 255, 1)">new<span style="color: rgba(0, 0, 0, 1)"> ShardedJedisPool(config, shards);
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> show() {
KeyOperate();
StringOperate();
ListOperate();
SetOperate();
SortedSetOperate();
HashOperate();
jedisPool.returnResource(jedis);
shardedJedisPool.returnResource(shardedJedis);
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> KeyOperate() {
System.out.println("=========********************=========key=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 清空数据
System.out.println("清空库中所有数据:"+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 判断key否存在
System.out.println("判断key999键是否存在:"+shardedJedis.exists("key999"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("新增key001,value001键值对:"+shardedJedis.set("key001", "value001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("判断key001是否存在:"+shardedJedis.exists("key001"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 输出系统中所有的key
System.out.println("新增key002,value002键值对:"+shardedJedis.set("key002", "value002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("系统中所有键如下:"<span style="color: rgba(0, 0, 0, 1)">);
Set<String> keys = jedis.keys("*"<span style="color: rgba(0, 0, 0, 1)">);
Iterator<String> it=<span style="color: rgba(0, 0, 0, 1)">keys.iterator() ;
<span style="color: rgba(0, 0, 255, 1)">while<span style="color: rgba(0, 0, 0, 1)">(it.hasNext()){
String key =<span style="color: rgba(0, 0, 0, 1)"> it.next();
System.out.println(key);
}
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 删除某个key,若key不存在,则忽略该命令。
System.out.println("系统中删除key002: "+jedis.del("key002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("判断key002是否存在:"+shardedJedis.exists("key002"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 设置 key001的过期时间
System.out.println("设置 key001的过期时间为5秒:"+jedis.expire("key001", 5<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 0, 255, 1)">try<span style="color: rgba(0, 0, 0, 1)">{
Thread.sleep(2000<span style="color: rgba(0, 0, 0, 1)">);
}
<span style="color: rgba(0, 0, 255, 1)">catch<span style="color: rgba(0, 0, 0, 1)"> (InterruptedException e){
}
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 查看某个key的剩余生存时间,单位【秒】.永久生存或者不存在的都返回-1
System.out.println("查看key001的剩余生存时间:"+jedis.ttl("key001"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 移除某个key的生存时间
System.out.println("移除key001的生存时间:"+jedis.persist("key001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看key001的剩余生存时间:"+jedis.ttl("key001"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 查看key所储存的值的类型
System.out.println("查看key所储存的值的类型:"+jedis.type("key001"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">/*<span style="color: rgba(0, 128, 0, 1)">
* 一些其他方法:1、修改键名:jedis.rename("key6", "key0");
* 2、将当前db的key移动到给定的db当中:jedis.move("foo", 1)
<span style="color: rgba(0, 128, 0, 1)">*/<span style="color: rgba(0, 0, 0, 1)">
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> StringOperate() {
System.out.println("========********************==============String_1=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 清空数据
System.out.println("清空库中所有数据:"+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
System.out.println("=============增============="<span style="color: rgba(0, 0, 0, 1)">);
jedis.set("key001","value001"<span style="color: rgba(0, 0, 0, 1)">);
jedis.set("key002","value002"<span style="color: rgba(0, 0, 0, 1)">);
jedis.set("key003","value003"<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("已新增的3个键值对如下:"<span style="color: rgba(0, 0, 0, 1)">);
System.out.println(jedis.get("key001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println(jedis.get("key002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println(jedis.get("key003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============删============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("删除key003键值对:"+jedis.del("key003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key003键对应的值:"+jedis.get("key003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============改============="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">1、直接覆盖原来的数据
System.out.println("直接覆盖key001原来的数据:"+jedis.set("key001","value001-update"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key001对应的新值:"+jedis.get("key001"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">2、直接覆盖原来的数据
System.out.println("在key002原来值后面追加:"+jedis.append("key002","+appendString"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key002对应的新值"+jedis.get("key002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============增,删,查(多个)============="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">/**<span style="color: rgba(0, 128, 0, 1)">
* mset,mget同时新增,修改,查询多个键值对
* 等价于:
* jedis.set("name","ssss");
* jedis.set("jarorwar","xxxx");
<span style="color: rgba(0, 128, 0, 1)">*/<span style="color: rgba(0, 0, 0, 1)">
System.out.println("一次性新增key201,key202,key203,key204及其对应值:"+jedis.mset("key201","value201"<span style="color: rgba(0, 0, 0, 1)">,
"key202","value202","key203","value203","key204","value204"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("一次性获取key201,key202,key203,key204各自对应的值:"+<span style="color: rgba(0, 0, 0, 1)">
jedis.mget("key201","key202","key203","key204"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("一次性删除key201,key202:"+jedis.del(<span style="color: rgba(0, 0, 255, 1)">new String[]{"key201", "key202"<span style="color: rgba(0, 0, 0, 1)">}));
System.out.println("一次性获取key201,key202,key203,key204各自对应的值:"+<span style="color: rgba(0, 0, 0, 1)">
jedis.mget("key201","key202","key203","key204"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">jedis具备的功能shardedJedis中也可直接使用,下面测试一些前面没用过的方法
System.out.println("======================String_2=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 清空数据
System.out.println("清空库中所有数据:"+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
System.out.println("=============新增键值对时防止覆盖原先值============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("原先key301不存在时,新增key301:"+shardedJedis.setnx("key301", "value301"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("原先key302不存在时,新增key302:"+shardedJedis.setnx("key302", "value302"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("当key302存在时,尝试新增key302:"+shardedJedis.setnx("key302", "value302_new"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key301对应的值:"+shardedJedis.get("key301"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key302对应的值:"+shardedJedis.get("key302"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============超过有效期键值对被删除============="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 设置key的有效期,并存储数据
System.out.println("新增key303,并指定过期时间为2秒"+shardedJedis.setex("key303", 2, "key303-2second"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key303对应的值:"+shardedJedis.get("key303"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 0, 255, 1)">try<span style="color: rgba(0, 0, 0, 1)">{
Thread.sleep(3000<span style="color: rgba(0, 0, 0, 1)">);
}
<span style="color: rgba(0, 0, 255, 1)">catch<span style="color: rgba(0, 0, 0, 1)"> (InterruptedException e){
}
System.out.println("3秒之后,获取key303对应的值:"+shardedJedis.get("key303"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============获取原值,更新为新值一步完成============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("key302原值:"+shardedJedis.getSet("key302", "value302-after-getset"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("key302新值:"+shardedJedis.get("key302"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============获取子串============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("获取key302对应值中的子串:"+shardedJedis.getrange("key302", 5, 7<span style="color: rgba(0, 0, 0, 1)">));
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> ListOperate() {
System.out.println("======********************======list=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 清空数据
System.out.println("清空库中所有数据:"+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
System.out.println("=============增============="<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "vector"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "ArrayList"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "vector"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "vector"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "LinkedList"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "MapList"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "SerialList"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("stringlists", "HashList"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("numberlists", "3"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("numberlists", "1"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("numberlists", "5"<span style="color: rgba(0, 0, 0, 1)">);
shardedJedis.lpush("numberlists", "2"<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("所有元素-stringlists:"+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("所有元素-numberlists:"+shardedJedis.lrange("numberlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============删============="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 删除列表指定的值 ,第二个参数为删除的个数(有重复时),后add进去的值先被删,类似于出栈
System.out.println("成功删除指定元素个数-stringlists:"+shardedJedis.lrem("stringlists", 2, "vector"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("删除指定元素之后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 删除区间以外的数据
System.out.println("删除下标0-3区间之外的元素:"+shardedJedis.ltrim("stringlists", 0, 3<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("删除指定区间之外元素后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 列表元素出栈
System.out.println("出栈元素:"+shardedJedis.lpop("stringlists"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("元素出栈后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============改============="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 修改列表中指定下标的值
shardedJedis.lset("stringlists", 0, "hello list!"<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("下标为0的值修改后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("=============查============="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 数组长度
System.out.println("长度-stringlists:"+shardedJedis.llen("stringlists"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("长度-numberlists:"+shardedJedis.llen("numberlists"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 排序
<span style="color: rgba(0, 128, 0, 1)">/*<span style="color: rgba(0, 128, 0, 1)">
* list中存字符串时必须指定参数为alpha,如果不使用SortingParams,而是直接使用sort("list"),
* 会出现"ERR One or more scores can't be converted into double"
<span style="color: rgba(0, 128, 0, 1)">*/<span style="color: rgba(0, 0, 0, 1)">
SortingParams sortingParameters = <span style="color: rgba(0, 0, 255, 1)">new<span style="color: rgba(0, 0, 0, 1)"> SortingParams();
sortingParameters.alpha();
sortingParameters.limit(0, 3<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("返回排序后的结果-stringlists:"+shardedJedis.sort("stringlists"<span style="color: rgba(0, 0, 0, 1)">,sortingParameters));
System.out.println("返回排序后的结果-numberlists:"+shardedJedis.sort("numberlists"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 子串: start为元素下标,end也为元素下标;-1代表倒数一个元素,-2代表倒数第二个元素
System.out.println("子串-第二个开始到结束:"+shardedJedis.lrange("stringlists", 1, -1<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 获取列表指定下标的值
System.out.println("获取下标为2的元素:"+shardedJedis.lindex("stringlists", 2)+"\n"<span style="color: rgba(0, 0, 0, 1)">);
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> SetOperate() {
System.out.println("=====********************========set=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 清空数据
System.out.println("清空库中所有数据:"+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
System.out.println("=============增============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("向sets集合中加入元素element001:"+jedis.sadd("sets", "element001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("向sets集合中加入元素element002:"+jedis.sadd("sets", "element002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("向sets集合中加入元素element003:"+jedis.sadd("sets", "element003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("向sets集合中加入元素element004:"+jedis.sadd("sets", "element004"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
System.out.println("=============删============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("集合sets中删除元素element003:"+jedis.srem("sets", "element003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"<span style="color: rgba(0, 0, 0, 1)">));
<span style="color: rgba(0, 128, 0, 1)">/*<span style="color: rgba(0, 128, 0, 1)">System.out.println("sets集合中任意位置的元素出栈:"+jedis.spop("sets"));//注:出栈元素位置居然不定?--无实际意义
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));<span style="color: rgba(0, 128, 0, 1)">*/<span style="color: rgba(0, 0, 0, 1)">
System.out.println();
System.out.println("=============改============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println();
System.out.println("=============查============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("判断element001是否在集合sets中:"+jedis.sismember("sets", "element001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("循环查询获取sets中的每个元素:"<span style="color: rgba(0, 0, 0, 1)">);
Set<String> set = jedis.smembers("sets"<span style="color: rgba(0, 0, 0, 1)">);
Iterator<String> it=<span style="color: rgba(0, 0, 0, 1)">set.iterator() ;
<span style="color: rgba(0, 0, 255, 1)">while<span style="color: rgba(0, 0, 0, 1)">(it.hasNext()){
Object obj=<span style="color: rgba(0, 0, 0, 1)">it.next();
System.out.println(obj);
}
System.out.println();
System.out.println("=============集合运算============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("sets1中添加元素element001:"+jedis.sadd("sets1", "element001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1中添加元素element002:"+jedis.sadd("sets1", "element002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1中添加元素element003:"+jedis.sadd("sets1", "element003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1中添加元素element002:"+jedis.sadd("sets2", "element002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1中添加元素element003:"+jedis.sadd("sets2", "element003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1中添加元素element004:"+jedis.sadd("sets2", "element004"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看sets1集合中的所有元素:"+jedis.smembers("sets1"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看sets2集合中的所有元素:"+jedis.smembers("sets2"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1和sets2交集:"+jedis.sinter("sets1", "sets2"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1和sets2并集:"+jedis.sunion("sets1", "sets2"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("sets1和sets2差集:"+jedis.sdiff("sets1", "sets2"));<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">差集:set1中有,set2中没有的元素
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> SortedSetOperate() {
System.out.println("=========********************============zset=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> 清空数据
System.out.println(jedis.flushDB());
System.out.println("=============增============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("zset中添加元素element001:"+shardedJedis.zadd("zset", 7.0, "element001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("zset中添加元素element002:"+shardedJedis.zadd("zset", 8.0, "element002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("zset中添加元素element003:"+shardedJedis.zadd("zset", 2.0, "element003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("zset中添加元素element004:"+shardedJedis.zadd("zset", 3.0, "element004"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("zset集合中的所有元素:"+shardedJedis.zrange("zset", 0, -1));<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">按照权重值排序
System.out.println();
System.out.println("=============删============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("zset中删除元素element002:"+shardedJedis.zrem("zset", "element002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("zset集合中的所有元素:"+shardedJedis.zrange("zset", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
System.out.println("=============改============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println();
System.out.println("=============查============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("统计zset集合中的元素中个数:"+shardedJedis.zcard("zset"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("统计zset集合中权重某个范围内(1.0——5.0),元素的个数:"+shardedJedis.zcount("zset", 1.0, 5.0<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看zset集合中element004的权重:"+shardedJedis.zscore("zset", "element004"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("查看下标1到2范围内的元素值:"+shardedJedis.zrange("zset", 1, 2<span style="color: rgba(0, 0, 0, 1)">));
}
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> HashOperate() {
System.out.println("=====********************=========hash=========================="<span style="color: rgba(0, 0, 0, 1)">);
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">清空数据
System.out.println(jedis.flushDB());
System.out.println("=============增============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("hashs中添加key001和value001键值对:"+shardedJedis.hset("hashs", "key001", "value001"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("hashs中添加key002和value002键值对:"+shardedJedis.hset("hashs", "key002", "value002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("hashs中添加key003和value003键值对:"+shardedJedis.hset("hashs", "key003", "value003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("新增key004和4的整型键值对:"+shardedJedis.hincrBy("hashs", "key004", 4l<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
System.out.println("=============删============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("hashs中删除key002键值对:"+shardedJedis.hdel("hashs", "key002"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
System.out.println("=============改============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("key004整型键值的值增加100:"+shardedJedis.hincrBy("hashs", "key004", 100l<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
System.out.println("=============查============="<span style="color: rgba(0, 0, 0, 1)">);
System.out.println("判断key003是否存在:"+shardedJedis.hexists("hashs", "key003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取key004对应的值:"+shardedJedis.hget("hashs", "key004"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("批量获取key001和key003对应的值:"+shardedJedis.hmget("hashs", "key001", "key003"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取hashs中所有的key:"+shardedJedis.hkeys("hashs"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println("获取hashs中所有的value:"+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
System.out.println();
}
}
(2)测试类
package com.redis;
public class Main {
<span style="color: rgba(0, 0, 255, 1)">public <span style="color: rgba(0, 0, 255, 1)">static <span style="color: rgba(0, 0, 255, 1)">void<span style="color: rgba(0, 0, 0, 1)"> main(String[] args) {
<span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)"> TODO Auto-generated method stub
<span style="color: rgba(0, 0, 255, 1)">new<span style="color: rgba(0, 0, 0, 1)"> RedisClient().show();
}
}
(3)结果如图