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"));
}
}
希望本文所述对大家java程序设计有所帮助。
文档来源：http://www.zzvips.com/article/179077.html
页:
[1]