Jedis客户端程序

Jedis简介

>1 创建maven普通项目,导入如下依赖

<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api -->
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-api</artifactId>
    <version>5.8.1</version>
    <scope>test</scope>
</dependency>

> 2 虚拟机和Redis设置

- 禁用Linux的防火墙：Linux(CentOS7)里执行命令
- systemctl stop/disable firewalld.service #停止防火墙
- redis.conf中注释掉bind 127.0.0.1 ,然后 protected-mode 的值设置为no #关闭仅本机连接

> 3 测试JAVA程序和Redis之间的通信

import redis.clients.jedis.Jedis;
public class Demo01 {
    @Test
    public void TestPing() {
        Jedis jedis = new Jedis("192.168.6.101",6379);
        String pong = jedis.ping();
        System.out.println("连接成功："+pong);
        jedis.close();
    }
}

key相关API

@Test
public void testKeyAPI(){
    jedis.set("k1", "v1");
    // 添加 键值对并设置过期时间
    jedis.setex("k2",100, "v2");
    jedis.set("k3", "v3");
    // 获取所有的键
    Set<String> keys = jedis.keys("*");
    System.out.println(keys.size());
    for (String key : keys) {
        System.out.println(key);
    }
    // 判断某个键是否存在
    System.out.println(jedis.exists("k1"));
    // 查看键剩余过期时间
    System.out.println(jedis.ttl("k2"));
    // 根据键获取值
    System.out.println(jedis.get("k1"));
}

String相关API

// 添加String
System.out.println(jedis.set("k1", "v1"));
// 一次添加多个
System.out.println(jedis.mset("ka","aaa","kb","bbb"));
//  获取
System.out.println(jedis.get("k1"));
// 一次获取多个
System.out.println(jedis.mget("k1","ka","kb"));
// 追加
System.out.println(jedis.append("k1", "vvvvv"));
// 获取长度
System.out.println(jedis.strlen("k1"));
// 不存在时进行设置
System.out.println(jedis.setnx("k1","xxxxx"));
System.out.println(jedis.setnx("k2","10"));
// 增长/减少
System.out.println(jedis.incr("k2"));
System.out.println(jedis.decr("k2"));
System.out.println(jedis.incrBy("k2", 10));
System.out.println(jedis.decrBy("k2", 10));

List相关API

    @Test
    public void testList(){
        // 放入List
        Long lpush = jedis.lpush("klist", "a", "b", "c", "d", "d");
        System.out.println(lpush);
        // 获取List
        List<String> kList = jedis.lrange("klist", 0, -1);
        kList.forEach(System.out::println);
        // 取值
        String klist = jedis.lpop("klist");

    }

Set相关API

   @Test
    public void testSet(){
        // 添加一个set集合
        jedis.sadd("skey","a","b","c","d","e");
        // 获取制定的set集合
        Set<String> skey = jedis.smembers("skey");
        skey.forEach(System.out::println);
        //判断是否包含
        System.out.println(jedis.sismember("skey","a"));
        //删除元素
        jedis.srem("skey","a","b");
        //弹出一个元素
        System.out.println(jedis.spop("skey"));
        //弹出N个元素
        System.out.println(jedis.spop("skey",2));
        //从一个set向另一个set移动元素
        jedis.smove("skey","bkey","X");
        // ……

    }

Hash相关API

// 添加值
jedis.hset("player1","pname","张三");
jedis.hset("player1","page","14");
jedis.hset("player1","gender","boy");
// 获取值
System.out.println(jedis.hget("player1","pname"));

//  批量添加值
Map<String,String> player2=new HashMap<String,String>();
player2.put("pname","李四");
player2.put("page","13");
player2.put("gender","boy");
jedis.hmset("player2",player2);

// 查看filed是否存在
System.out.println(jedis.hexists("player1", "pname"));
// 查看集合中所有的field
Set<String> player1fields = jedis.hkeys("player1");
player1fields.forEach(System.out::println);
// 查看集合中所有的value
List<String> player1vals = jedis.hvals("player1");
player1vals.forEach(System.out::println);
// 给制定属性+1
jedis.hincrBy("player1","page",5);
// 如不存在,添加某个属性
jedis.hsetnx("player1","height","156");
System.out.println(jedis.hget("player1","page"));
System.out.println(jedis.hget("player1","height"));

ZSet相关API

// 准备数据
Map<String ,Double> map=new HashMap<>();
map.put("李四",11d);
map.put("王五",8d);
map.put("赵六",20d);
map.put("刘七",3d);
//  添加元素
jedis.zadd("zkey",10,"张三");
jedis.zadd("zkey",map);
 // 升序返回有序
 Set<String> zkeys = jedis.zrange("zkey", 0, -1);
 zkeys.forEach(System.out::println);
 //  降序返回元素
 Set<String> zkeys2 = jedis.zrevrange("zkey", 0, -1);
 zkeys2.forEach(System.out::println);

 System.out.println("===========");
 Set<String> zkeys3 = jedis.zrangeByScore("zkey", 10, 20);
 zkeys3.forEach(System.out::println);
 System.out.println("===========");
 Set<String> zkeys4 = jedis.zrevrangeByScore("zkey", 20, 10);
 zkeys4.forEach(System.out::println);
 // 增加分数
 jedis.zincrby("zkey",5,"张三");
 jedis.zincrby("zkey",-5,"赵六");
 //  删除 元素
 jedis.zrem("zkey","张三");
 System.out.println(jedis.zcount("zkey",10,20));
 System.out.println(jedis.zrank("zkey","李四"));