Java连接redis及基本操作示例

本文实例讲述了Java连接redis及基本操作。分享给大家供大家参考,具体如下:

点击此处:本站下载安装。

解压安装

启动redis:使用cd命令切换目录到 D:\redis运行redis-server.exe redis.windows.conf

默认端口为6379

访问:切换到redis目录下运行 redis-cli.exe -h 127.0.0.1 -p 6379。

pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>testRedis</groupId>

<artifactId>testRedis</artifactId>

<version>0.0.1-SNAPSHOT</version>

<build/>

<dependencies>

<!-- Redis NoSQL 操作依赖 -->

<dependency>

<groupId>redis.clients</groupId>

<artifactId>jedis</artifactId>

<version>2.1.0</version>

</dependency>

</dependencies>

</project>

测试代码:

package com.crisy.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;

public class RedisClient {

/**

* 一般项目基本都使用非切片池;

* 切片池主要用于分布式项目,可以设置主从Redis库

*/

private Jedis jedis;//非切片客户端连接

private JedisPool jedisPool;//非切片连接池

private ShardedJedis shardedJedis;//切片客户端连接

private ShardedJedisPool shardedJedisPool;//切片连接池

public RedisClient(){

initialPool(); //初始化非切片连接池

initialShardedPool(); //初始化切片连接池

shardedJedis = shardedJedisPool.getResource();

jedis = jedisPool.getResource();

}

private void initialPool() {

JedisPoolConfig config = new JedisPoolConfig();

config.setMaxActive(20);

config.setMaxIdle(5);

config.setMaxWait(100001);

config.setTestOnBorrow(false);

jedisPool = new JedisPool(config,"127.0.0.1",6379);

}

private void initialShardedPool() {

JedisPoolConfig config = new JedisPoolConfig();

config.setMaxActive(20);

config.setMaxIdle(5);

config.setMaxWait(100001);

config.setTestOnBorrow(false);

//slave连接

List<JedisShardInfo> shardInfos = new ArrayList<JedisShardInfo>();

shardInfos.add(new JedisShardInfo("127.0.0.1",6379,"master"));

//构造池

shardedJedisPool = new ShardedJedisPool(config, shardInfos);

}

public void show(){

System.out.println("----对Value操作的命令----");

valueOperate();

System.out.println("----对String操作的命令----");

stringOperator();

System.out.println("----对List操作的命令----");

listOperator();

System.out.println("----对Set操作的命令----");

setOperator();

System.out.println("----对hash操作的命令----");

hashOperate();

}

/**

* 对Value操作的命令

* @throws InterruptedException

*/

private void valueOperate(){

System.out.println("清空当前选择库中所有key:"+jedis.flushDB());

System.out.println("清空所有库中所有key:"+jedis.flushAll());

System.out.println("判断myKey键是否存在:"+shardedJedis.exists("myKey"));

System.out.println("新增myKey:"+shardedJedis.set("myKey","myValue"));

System.out.println("判断myKey键是否存在:"+shardedJedis.exists("myKey"));

System.out.println("查看myKey所储存的值的类型:"+jedis.type("myKey"));

System.out.println("重命名myKey-myKey_1:"+jedis.rename("myKey", "myKey_1"));

System.out.println("判断myKey键是否存在:"+shardedJedis.exists("myKey"));

System.out.println("判断myKey_1键是否存在:"+shardedJedis.exists("myKey_1"));

System.out.println("新增myKey_2:"+shardedJedis.set("myKey_2","myValue_2"));

System.out.println("查看索引为0的Key:"+jedis.select(0));

System.out.println("当前数据库中key的数目:"+jedis.dbSize());

System.out.println("系统中所有键如下:");

//返回满足给定pattern的所有key

Set<String> keys = jedis.keys("*");

Iterator<String> it=keys.iterator() ;

while(it.hasNext()){

String key = it.next();

System.out.println(key);

}

//删除时,如果不存在忽略此命令

System.out.println("系统中删除myKey_3: "+jedis.del("myKey_3"));

System.out.println("系统中删除myKey_2: "+jedis.del("myKey_2"));

System.out.println("判断myKey_2是否存在:"+shardedJedis.exists("myKey_2"));

System.out.println("设置 myKey_1的过期时间为5秒:"+jedis.expire("myKey_1", 5));

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

//没有设置过期时间或者不存在的都返回-1

System.out.println("获得myKey_1的剩余活动时间:"+jedis.ttl("myKey_1"));

System.out.println("取消设置myKey_1的活动时间:"+jedis.persist("myKey_1"));

System.out.println("查看myKey_1的剩余活动时间:"+jedis.ttl("myKey_1"));

}

/**

* 对String操作的命令

*/

private void stringOperator(){

System.out.println("清空当前选择库中所有key:"+jedis.flushDB());

System.out.println("给数据库中名称为key01的string赋予值value:"+jedis.set("key01", "value01"));

System.out.println("给数据库中名称为key02的string赋予值value:"+jedis.set("key02", "value02"));

System.out.println("给数据库中名称为key03的string赋予值value:"+jedis.set("key03", "value03"));

System.out.println("返回数据库中名称为key01的string的value:"+jedis.get("key01"));

System.out.println("返回库中多个string的value:"+jedis.mget("key01","key02","key03"));

System.out.println("添加string,名称为key,值为value:"+jedis.setnx("key04","value04"));

System.out.println("向库中添加string,设定过期时间time:"+jedis.setex("key05",5,"value05"));

System.out.println("批量设置多个string的值:"+jedis.mset("key06_1","value06_1","key06_2","value06_2"));

System.out.println("给数据库中名称为key07的string赋予值value:"+jedis.set("key07", "1"));

System.out.println("名称为key07的string增1操作:"+jedis.incr("key07"));

//ERR value is not an integer or out of range

//System.out.println("名称为key01的string增1操作:"+jedis.incr("key01"));

System.out.println("名称为key07的string增加integer:"+jedis.incrBy("key07", 5));

System.out.println("名称为key07的string减1操作:"+jedis.decr("key07"));

System.out.println("名称为key07的string减少integer:"+jedis.decrBy("key07", 3));

System.out.println("名称为key的string的值附加value:"+jedis.append("key01","Hello World"));

System.out.println("返回名称为key的string的value的子串:"+jedis.substr("key01",0,5));

}

/**

* 对List操作的命令

*/

private void listOperator(){

System.out.println("清空当前选择库中所有key:"+jedis.flushDB());

//准备两个list

shardedJedis.lpush("mylist", "Java");

shardedJedis.lpush("mylist", "C");

shardedJedis.lpush("mylist", "C++");

shardedJedis.lpush("mylist", "Java");

System.out.println("在名称为mylist的list尾添加一个值为value的元素:"+jedis.rpush("mylist","phython"));

System.out.println("在名称为mylist的list头添加一个值为value的 元素:"+jedis.rpush("mylist","PHP"));

System.out.println("返回名称为mylist的list的长度:"+jedis.llen("mylist"));

System.out.println("返回名称为mylist中start至end之间的元素:"+jedis.lrange("mylist",0,3));

System.out.println("截取名称为mylist的list:"+jedis.ltrim("mylist",0,3));

System.out.println("返回名称为mylist的list中index位置的元素:"+jedis.lindex("mylist",0));

System.out.println("给名称为mylist的list中index位置的元素赋值:"+jedis.lset("mylist",0,"hahahahah我改啦"));

System.out.println("删除count个mylist的key中值为value的元素:"+jedis.lrem("mylist",1,"Java"));

System.out.println("返回并删除名称为mylist的list中的首元素:"+jedis.lpop("mylist"));

System.out.println("返回并删除名称为mylist的list中的尾元素:"+jedis.rpop("mylist"));

}

/**

* 对Set操作的命令

*/

private void setOperator(){

System.out.println("清空当前选择库中所有key:"+jedis.flushDB());

//准备两个set

jedis.sadd("myset","hahaha");

jedis.sadd("myset","hahaha");

jedis.sadd("myset","lalala");

jedis.sadd("myset","kakaka");

jedis.sadd("myset2","hahaha");

jedis.sadd("myset2","lalala");

jedis.sadd("myset2","kakaka");

System.out.println("向名称为myset的set中添加元素member:"+jedis.sadd("myset","wawawa"));

System.out.println("返回名称为myset的set的所有元素:"+jedis.smembers("myset"));

System.out.println("删除名称为myset的set中的元素member:"+jedis.srem("myset","wawawa"));

System.out.println("返回名称为myset的set的所有元素:"+jedis.smembers("myset"));

System.out.println("随机返回并删除名称为myset的set中一个元素:"+jedis.spop("myset"));

System.out.println("移到集合元素:"+jedis.smove("myset","myset2","hahaha"));

System.out.println("返回名称为myset的set的所有元素:"+jedis.smembers("myset"));

System.out.println("返回名称为myset2的set的所有元素:"+jedis.smembers("myset2"));

System.out.println("返回名称为mykey的set的基数:"+jedis.scard("myset"));

System.out.println("member是否是名称为mykey的set的元素:"+jedis.sismember("myset","hahaha"));

System.out.println("求交集:"+jedis.sinter("myset","myset2"));

System.out.println("求交集并将交集保存到dstkey的集合:"+jedis.sinterstore("dstkey","myset2","myset"));

System.out.println("返回名称为dstkey的set的所有元素:"+jedis.smembers("dstkey"));

System.out.println("求并集:"+jedis.sunion("myset","myset2"));

System.out.println("求并集并将并集保存到dstkey的集合:"+jedis.sinterstore("dstkey","myset2","myset"));

System.out.println("返回名称为dstkey的set的所有元素:"+jedis.smembers("dstkey"));

System.out.println("求差集:"+jedis.sdiff("myset2","myset"));

System.out.println("求差集并将差集保存到dstkey的集合:"+jedis.sdiffstore("dstkey","myset2","myset"));

System.out.println("返回名称为dstkey的set的所有元素:"+jedis.smembers("dstkey"));

System.out.println("随机返回名称为dstkey的set的一个元素:"+jedis.srandmember("dstkey"));

}

/**

* hash

*/

private void hashOperate(){

System.out.println(jedis.flushDB());

System.out.println("向名称为key的hash中添加元素field1:"+shardedJedis.hset("key", "field1", "value1"));

System.out.println("向名称为key的hash中添加元素field2:"+shardedJedis.hset("key", "field2", "value2"));

System.out.println("向名称为key的hash中添加元素field3:"+shardedJedis.hset("key", "field3", "value3"));

System.out.println("返回名称为key的hash中field1对应的value:"+shardedJedis.hget("key", "field1"));

System.out.println("返回名称为key的hash中field1对应的value:"+shardedJedis.hmget("key", "field1","field2","field3"));

System.out.println("删除名称为key的hash中键为field1的域:"+shardedJedis.hdel("key", "field1"));

System.out.println("返回名称为key的hash中所有键对应的value:"+shardedJedis.hvals("key"));

System.out.println("返回名称为key的hash中元素个数:"+shardedJedis.hlen("key"));

System.out.println("返回名称为key的hash中所有键:"+shardedJedis.hkeys("key"));

System.out.println("返回名称为key的hash中所有的键(field)及其对应的value:"+shardedJedis.hgetAll("key"));

System.out.println("名称为key的hash中是否存在键为field1的域:"+shardedJedis.hexists("key","field1"));

}

}

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