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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