linux下小试redis demo
先启动 redis-server /etc/redis/redis.conf
package com.test;
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;
/**
*
* @author luozhonghua
*
*/
public class RedisClient {
private Jedis jedis;// 非切片额客户端连接
private JedisPool jedisPool;// 非切片连接池
private ShardedJedis shardedJedis;// 切片额客户端连接
private ShardedJedisPool shardedJedisPool;// 切片连接池
public RedisClient() {
initialPool();
initialShardedPool();
shardedJedis = shardedJedisPool.getResource();
jedis = jedisPool.getResource();
}
/**
* 初始化非切片池
*/
private void initialPool() {
// 池基本配置
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxActive(20);
config.setMaxIdle(5);
config.setMaxWait(1000l);
config.setTestOnBorrow(false);
System.out.println("begin...");
jedisPool = new JedisPool(config, "127.0.0.1", 6379);
System.out.println("end...");
}
/**
* 初始化切片池
*/
private void initialShardedPool() {
// 池基本配置
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxActive(20);
config.setMaxIdle(5);
config.setMaxWait(1000l);
config.setTestOnBorrow(false);
// slave链接
List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>();
shards.add(new JedisShardInfo("127.0.0.1", 6379, "master"));
// 构造池
shardedJedisPool = new ShardedJedisPool(config, shards);
}
public void show() {
KeyOperate();
StringOperate();
ListOperate();
SetOperate();
SortedSetOperate();
HashOperate();
jedisPool.returnResource(jedis);
shardedJedisPool.returnResource(shardedJedis);
}
private void KeyOperate() {
System.out.println("======================key==========================");
// 清空数据
System.out.println("清空库中所有数据："+jedis.flushDB());
// 判断key否存在
System.out.println("判断key999键是否存在："+shardedJedis.exists("key999"));
System.out.println("新增key001,value001键值对："+shardedJedis.set("key001", "value001"));
System.out.println("判断key001是否存在："+shardedJedis.exists("key001"));
// 输出系统中所有的key
System.out.println("新增key002,value002键值对："+shardedJedis.set("key002", "value002"));
System.out.println("系统中所有键如下：");
Set<String> keys = jedis.keys("*");
Iterator<String> it=keys.iterator() ;
while(it.hasNext()){
String key = it.next();
System.out.println(key);
}
// 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"));
System.out.println("判断key002是否存在："+shardedJedis.exists("key002"));
// 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));
try{
Thread.sleep(2000);
}
catch (InterruptedException e){
}
// 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"));
// 移除某个key的生存时间
System.out.println("移除key001的生存时间："+jedis.persist("key001"));
System.out.println("查看key001的剩余生存时间："+jedis.ttl("key001"));
// 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"));
/*
* 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)
*/
}
private void StringOperate()
{
System.out.println("======================String_1==========================");
// 清空数据
System.out.println("清空库中所有数据："+jedis.flushDB());
System.out.println("=============增=============");
jedis.set("key001","value001");
jedis.set("key002","value002");
jedis.set("key003","value003");
System.out.println("已新增的3个键值对如下：");
System.out.println(jedis.get("key001"));
System.out.println(jedis.get("key002"));
System.out.println(jedis.get("key003"));
System.out.println("=============删=============");
System.out.println("删除key003键值对："+jedis.del("key003"));
System.out.println("获取key003键对应的值："+jedis.get("key003"));
System.out.println("=============改=============");
//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"));
System.out.println("获取key001对应的新值："+jedis.get("key001"));
//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"));
System.out.println("获取key002对应的新值"+jedis.get("key002"));
System.out.println("=============增，删，查（多个）=============");
/**
* 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");
*/
System.out.println("一次性新增key201,key202,key203,key204及其对应值："+jedis.mset("key201","value201",
"key202","value202","key203","value203","key204","value204"));
System.out.println("一次性获取key201,key202,key203,key204各自对应的值："+
jedis.mget("key201","key202","key203","key204"));
System.out.println("一次性删除key201,key202："+jedis.del(new String[]{"key201", "key202"}));
System.out.println("一次性获取key201,key202,key203,key204各自对应的值："+
jedis.mget("key201","key202","key203","key204"));
System.out.println();
//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==========================");
// 清空数据
System.out.println("清空库中所有数据："+jedis.flushDB());
System.out.println("=============新增键值对时防止覆盖原先值=============");
System.out.println("原先key301不存在时，新增key301："+shardedJedis.setnx("key301", "value301"));
System.out.println("原先key302不存在时，新增key302："+shardedJedis.setnx("key302", "value302"));
System.out.println("当key302存在时，尝试新增key302："+shardedJedis.setnx("key302", "value302_new"));
System.out.println("获取key301对应的值："+shardedJedis.get("key301"));
System.out.println("获取key302对应的值："+shardedJedis.get("key302"));
System.out.println("=============超过有效期键值对被删除=============");
// 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"));
System.out.println("获取key303对应的值："+shardedJedis.get("key303"));
try{
Thread.sleep(3000);
}
catch (InterruptedException e){
}
System.out.println("3秒之后，获取key303对应的值："+shardedJedis.get("key303"));
System.out.println("=============获取原值，更新为新值一步完成=============");
System.out.println("key302原值："+shardedJedis.getSet("key302", "value302-after-getset"));
System.out.println("key302新值："+shardedJedis.get("key302"));
System.out.println("=============获取子串=============");
System.out.println("获取key302对应值中的子串："+shardedJedis.getrange("key302", 5, 7));
}
private void ListOperate() {
}
private void SetOperate() {
}
private void SortedSetOperate() {
}
private void HashOperate() {
}
public static void main(String[]args){
new RedisClient().show();
}
}
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