Java连接redis及基本操作示例
程序员文章站
2023-12-18 15:51:34
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:...
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")); } }
更多关于java相关内容感兴趣的读者可查看本站专题:《java+mysql数据库程序设计总结》、《java操作excel技巧总结》、《java数据结构与算法教程》、《java文件与目录操作技巧汇总》及《java操作dom节点技巧总结》
希望本文所述对大家java程序设计有所帮助。