Redis JAVA客户端 Jedis常用方法
2024-10-14 15:50:06
Jedis 是 Redis 官方首选的 Java 客户端开发包 (redis的java版本的客户端实现)
#MAVEN配置
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
#JAVA代码
package yyl.example.demo.redis;
import java.util.HashMap;
import java.util.Map;
import redis.clients.jedis.Jedis; /**
* Jedis 常用方法用法
*/
public class JedisTest { public static void main(String[] args) {
Jedis jedis = new Jedis("localhost", 6379);
//jedis.auth("admin"); testString(jedis);
testHash(jedis);
testList(jedis);
testSet(jedis);
testZSet(jedis); testCommands(jedis); jedis.disconnect();
} /** 字符串 */
private static void testString(Jedis jedis) { System.out.println("#string:"); //# SET key "hello"
System.out.println("> SET key \"hello\"");
System.out.println(jedis.set("key", "hello")); //# GET key
System.out.println("> GET key");
System.out.println(jedis.get("key")); System.out.println("> APPEND key \" world\"");
System.out.println(jedis.append("key", " world")); //拼接
System.out.println("> GET key");
System.out.println(jedis.get("key")); //删除某个键 #DEL key [key ...]
System.out.println("> DEL key");
System.out.println(jedis.del("key")); //删除某个键
System.out.println("> GET key");
System.out.println(jedis.get("key")); //设置多个键值
//#MSET key1 "Hello" key2 "World"
System.out.println("> MSET key1 \"Hello\" key2 \"World\"");
System.out.println(jedis.mset("key1", "hello", "key2", "World")); System.out.println("> GET key1");
System.out.println(jedis.get("key1"));
System.out.println("> GET key2");
System.out.println(jedis.get("key2")); //删除一组键 #DEL key1 key2
System.out.println("> DEL key1 key2");
System.out.println(jedis.del("key1", "key2"));
System.out.println(jedis.get("key2")); System.out.println("\n");
} /** 哈希 */
private static void testHash(Jedis jedis) { System.out.println("#hash:"); System.out.println("> HMSET myhash field1 \"Hello\" field2 \"World\"");
Map<String, String> map = new HashMap<String, String>();
map.put("field1", "Hello");
map.put("field2", "World");
System.out.println(jedis.hmset("myhash", map)); System.out.println("> HMGET myhash field1 field2");
System.out.println(jedis.hmget("myhash", "field1", "field2")); //返回 key 指定的哈希集中所有的字段和值。
System.out.println("> HGETALL myhash");
System.out.println(jedis.hgetAll("myhash")); //删除map中的某个键值
System.out.println("> HDEL myhash field1");
System.out.println(jedis.hdel("myhash", "field1"));
System.out.println("> HDEL myhash field1");
System.out.println(jedis.hdel("myhash", "field1")); //返回 key 指定的哈希集包含的字段的数量
System.out.println("> HLEN myhash");
System.out.println(jedis.hlen("myhash")); //设置 key 指定的哈希集中指定字段的值
System.out.println("> HSET myhash field1 \"Hello\"");
System.out.println(jedis.hset("myhash", "field1", "Hello"));
System.out.println("> HGET myhash field1");
System.out.println(jedis.hget("myhash", "field1")); //返回指定的哈希集中所有字段的名字
System.out.println("> HKEYS myhash");
System.out.println(jedis.hkeys("myhash")); //移除哈希
jedis.del("myhash");
System.out.println("\n");
} /** 列表 */
private static void testList(Jedis jedis) { System.out.println("#list:"); //将所有指定的值插入到存于 key 的列表的头部
//如果 key 不存在,那么在进行 push 操作前会创建一个空列表
//如果 key 对应的值不是一个 list 的话,那么会抛出异常
System.out.println("> HKEYS myhash");
System.out.println(jedis.lpush("mylist", "hello"));
System.out.println(jedis.lpush("mylist", "world")); //返回存储在列表里指定范围内的元素
//(偏移量也可以是负数,表示偏移量是从list尾部开始计数。 例如, -1 表示列表的最后一个元素,-2 是倒数第二个,以此类推)
System.out.println("> LRANGE mylist 0 -1");
System.out.println(jedis.lrange("mylist", 0, -1)); System.out.println("> DEL mylist");
System.out.println(jedis.del("mylist")); //向存于 key 的列表的尾部插入所有指定的值
System.out.println("> RPUSH mylist \"1\" \"2\" \"3\" \"4\" \"5\"");
System.out.println(jedis.rpush("mylist", "1", "2", "3", "4", "5")); //移除并且返回list的第一个元素
System.out.println("> LPOP mylist");
System.out.println(jedis.lpop("mylist"));
System.out.println("> LPOP mylist");
System.out.println(jedis.lpop("mylist")); //返回存储在 key 里的list的长度
System.out.println("> LLEN mylist");
System.out.println(jedis.llen("mylist")); //移除列表
jedis.del("mylist");
System.out.println("\n");
} /** 集合 */
private static void testSet(Jedis jedis) { System.out.println("#set:"); //添加元素
System.out.println("> SADD myset \"Hello\"");
System.out.println(jedis.sadd("myset", "Hello"));
System.out.println("> SADD myset \"World\"");
System.out.println(jedis.sadd("myset", "World"));
System.out.println("> SADD myset \"World\"");
System.out.println(jedis.sadd("myset", "World")); //获取集合成员(元素)
System.out.println("> SMEMBERS myset");
System.out.println(jedis.smembers("myset")); //移除集合
jedis.del("myset");
System.out.println("\n");
} /** 有序集合 */
private static void testZSet(Jedis jedis) {
System.out.println("#zset:"); System.out.println("> ZADD myzset 3 \"three\"");
System.out.println(jedis.zadd("myzset", 3, "three")); System.out.println("> ZADD myzset 1 \"two\"");
System.out.println(jedis.zadd("myzset", 2, "two")); System.out.println("> ZADD myzset 1 \"one\" 1 \"uno\"");
Map<String, Double> scoreMembers = new HashMap<>();
scoreMembers.put("one", 1D);
scoreMembers.put("uno", 1D);
System.out.println(jedis.zadd("myzset", scoreMembers)); System.out.println("> ZRANGE myzset 0 -1");
System.out.println(jedis.zrange("myzset", 0, -1)); //移除集合
jedis.del("myzset");
System.out.println("\n");
} /** 其他常用操作 */
private static void testCommands(Jedis jedis) { System.out.println("#COMMANDS:"); //# 返回key所存储的value的数据结构类型
System.out.println("> SET key1 \"value\"");
System.out.println(jedis.set("key1", "value"));
System.out.println("> HSET key2 field \"value\"");
System.out.println(jedis.hset("key2", "field", "value"));
System.out.println("> LPUSH key3 \"value\"");
System.out.println(jedis.lpush("key3", "value"));
System.out.println("> SADD key4 \"value\"");
System.out.println(jedis.sadd("key4", "value"));
System.out.println("> ZADD key5 \"value\"");
System.out.println(jedis.zadd("key5", 0, "value")); //type可以返回string, list, set, zset , hash, none 等不同的类型。
System.out.println("> TYPE key1");
System.out.println(jedis.type("key1"));
System.out.println("> TYPE key2");
System.out.println(jedis.type("key2"));
System.out.println("> TYPE key3");
System.out.println(jedis.type("key3"));
System.out.println("> TYPE key4");
System.out.println(jedis.type("key4"));
System.out.println("> TYPE key5");
System.out.println(jedis.type("key5"));
System.out.println("> TYPE key6");
System.out.println(jedis.type("key6"));//不存在时返回none System.out.println("\n");
//设置超时时间
System.out.println("> SET mykey \"hello\"");
System.out.println(jedis.set("mykey", "hello")); //设置超时时间(单位:秒)
System.out.println("> EXPIRE mykey 2 ");
System.out.println(jedis.expire("mykey", 2));//[EXPIRE key seconds] //返回key剩余的过期时间(单位:秒)
System.out.println("> TTL mykey ");
System.out.println(jedis.ttl("mykey")); //返回key剩余的过期时间(单位:毫秒)
System.out.println("> PTTL mykey ");
System.out.println(jedis.pttl("mykey")); System.out.println("> EXISTS mykey ");
System.out.println(jedis.exists("mykey")); System.out.println("# sleep 2000 Millisecond!");
try {
Thread.sleep(2 * 1000);
} catch (InterruptedException e) {
} System.out.println("> EXISTS mykey ");
System.out.println(jedis.exists("mykey")); //移除
jedis.del("mykey", "key1", "key2", "key3", "key4", "key5");
System.out.println("\n");
}
}
最新文章
- 【SQL语句】update ... ... from ......
- python3 实现简单信用卡管理程序
- Masonry控制台打印约束冲突问题解决
- 转:js-sdk探索之微信网页分享
- 【转载】怎样使用ZEMAX导出高质量的图像动画
- jquery实现";跳到底部";,";回到顶部";效果
- 【BZOJ1012】【JSOI2008】最大数
- breakpoints
- extern的困惑
- S3C2410 实验三——块拷贝、字拷贝(寄存器的理解)
- 数据库msqlserver的几种类型及解决MSSQLServer服务启动不了的问题
- linux进程调度之 FIFO 和 RR 调度策略---SYSTEMTAP
- JAVA编译中拒绝访问的问题及解决方案
- mysql 备份数据
- RPC(Remote Procedure Call Protocol)——远程过程调用协议
- [BZOJ4518]征途
- python2和python3 安装pip冲突问题
- Android中获得网络状况的实现
- Celery异步的分布式任务调度理解
- 构造方法 this super
热门文章
- Android面试,View绘制流程以及invalidate()等相关方法分析
- 根据WSDL文件生成代理类
- Project has no project.properties file! Edit the project properties to set one.
- 百度地图API拾取坐标网址
- 〖Linux〗不重复启动某应用程序的脚本
- Maven + Apache Felix + CXF + DOSGi series
- springmvc sitemesh json问题
- JavaScript常用語句
- python --文本文件的输入输出
- 自增长主键Id的设计