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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