Redis數據庫（六）——jedis操作和整合springboot

jedis操作和整合springboot

Jedis項目搭建

Jedis是Redis官方推薦的Java連接開發工具。要在Java開發中使用好Redis中間件，必須對Jedis熟悉才能
寫成漂亮的代碼

1、導入相關依賴

    <dependencies>
        <!--導入jedis包-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.6.0</version>
        </dependency>
        <!--導入fastjson-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.70</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.25</version>
        </dependency>
    </dependencies>

2、application.properties配置redis配置

# 應用名稱
spring.application.name=redis_springboot
#Redis服務器地址
spring.redis.host=192.168.137.4
#Redis服務器連接端口
spring.redis.port=6379
#Redis數據庫索引（默認為0）
spring.redis.database= 0
#連接超時時間（毫秒）
spring.redis.timeout=1800000
#連接池最大連接數（使用負值表示沒有限制）
spring.redis.lettuce.pool.max-active=20
#最大阻塞等待時間(負數表示沒限制)
spring.redis.lettuce.pool.max-wait=-1
#連接池中的最大空閑連接
spring.redis.lettuce.pool.max-idle=5
#連接池中的最小空閑連接
spring.redis.lettuce.pool.min-idle=0

3、編寫測試類測試是否ping成功

注意：必須要在配置文件取消本地和安全模式

package com.study;

import redis.clients.jedis.Jedis;

public class TestPing {
    public static void main(String[] args) {
        //1.new Jedis對象
        Jedis jedis = new Jedis("192.168.137.4",6379);
        System.out.println(jedis.ping());
    }
}

Jedis常用API

一、key操作

package com.study;

import redis.clients.jedis.Jedis;


public class TestKey {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("192.168.137.4",6379);

        System.out.println("清空數據："+jedis.flushDB());
        System.out.println("判斷某個鍵是否存在："+jedis.exists("username"));
        System.out.println("新增<username,zhangsan>的鍵值對："+jedis.set("username","zhangsan"));
        System.out.println("新增<password,password>的鍵值對："+jedis.set("password","password"));
        System.out.println("查看所有的key："+jedis.keys("*"));
        System.out.println("刪除key鍵password："+jedis.del("password"));
        System.out.println("判斷key鍵password是否存在："+jedis.exists("password"));
        System.out.println("查看username所存儲的值的類型："+jedis.type("username"));
        System.out.println("隨機返回key空間的一個："+jedis.randomKey());
        System.out.println("重命名key："+jedis.rename("username","name"));
        System.out.println("取出改后的name："+jedis.get("name"));
        System.out.println("按索引切換數據庫："+jedis.select(0));
        System.out.println("清空數據庫："+jedis.flushDB());
        System.out.println("返回當前數據庫中key的數目："+jedis.dbSize());
        System.out.println("清空所有數據庫："+jedis.flushAll());
    }
}

二、string操作

package com.study;

import redis.clients.jedis.Jedis;

import java.util.concurrent.TimeUnit;

public class TestString {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("192.168.137.4", 6379);

        jedis.flushDB();
        System.out.println("========添加數據=======");
        System.out.println(jedis.set("key1","value1"));
        System.out.println(jedis.set("key2","value2"));
        System.out.println(jedis.set("key3","value3"));
        System.out.println("刪除鍵key2："+jedis.del("key2"));
        System.out.println("獲取鍵key2："+jedis.get("key2"));
        System.out.println("修改key1："+jedis.set("key1","value1Changed"));
        System.out.println("獲取key1的值："+jedis.get("key1"));
        System.out.println("添加多個鍵值對："+jedis.mset("key01","value01","key02","value02","key03","value03"));
        System.out.println("獲取多個鍵值對："+jedis.mget("key01","key02","key03"));
        System.out.println("刪除多個鍵值對："+jedis.del("key01","key02"));

        jedis.flushDB();
        System.out.println("========新增鍵值對防止覆蓋原先值========");
        System.out.println(jedis.setnx("key1","value1"));
        System.out.println(jedis.setnx("key2","value2"));
        System.out.println(jedis.setnx("key2","value2-new"));
        System.out.println("獲取多個鍵值對的值"+jedis.mget("key1","key2"));

        System.out.println("========新增鍵值對並設置有效時間==========");
        System.out.println(jedis.setex("key3",2,"value3")); //有效時間為2秒
        System.out.println(jedis.get("key3"));
        try {
            TimeUnit.SECONDS.sleep(3);
        }catch (InterruptedException e){
            e.printStackTrace();
        }
        System.out.println(jedis.get("key3"));

        System.out.println("========獲取原值，更新為新值=======");
        System.out.println(jedis.getSet("key2","key2GetSet"));
        System.out.println(jedis.get("key2"));

        System.out.println("獲得key2的值的字串："+jedis.getrange("key2",2,4));
    }
}

三、set操作

package com.study;

import redis.clients.jedis.Jedis;

public class TestSet {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("192.168.137.4",6379);
        jedis.flushDB();
        System.out.println("============向集合中添加元素（不重復）============");
        System.out.println(jedis.sadd("eleSet", "e1","e2","e4","e3","e0","e8","e7","e5"));
        System.out.println(jedis.sadd("eleSet", "e6"));
        System.out.println(jedis.sadd("eleSet", "e6"));
        System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet"));
        System.out.println("刪除一個元素e0："+jedis.srem("eleSet", "e0"));
        System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet"));
        System.out.println("刪除兩個元素e7和e6："+jedis.srem("eleSet", "e7","e6"));
        System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet"));
        System.out.println("隨機的移除集合中的一個元素："+jedis.spop("eleSet"));
        System.out.println("隨機的移除集合中的一個元素："+jedis.spop("eleSet"));
        System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet"));
        System.out.println("eleSet中包含元素的個數："+jedis.scard("eleSet"));
        System.out.println("e3是否在eleSet中："+jedis.sismember("eleSet", "e3"));
        System.out.println("e1是否在eleSet中："+jedis.sismember("eleSet", "e1"));
        System.out.println("e1是否在eleSet中："+jedis.sismember("eleSet", "e5"));
        System.out.println("=================================");
        System.out.println(jedis.sadd("eleSet1", "e1","e2","e4","e3","e0","e8","e7","e5"));
        System.out.println(jedis.sadd("eleSet2", "e1","e2","e4","e3","e0","e8"));
        System.out.println("將eleSet1中刪除e1並存入eleSet3 中："+jedis.smove("eleSet1", "eleSet3", "e1"));//移到集合元素
        System.out.println("將eleSet1中刪除e2並存入eleSet3 中："+jedis.smove("eleSet1", "eleSet3", "e2"));
        System.out.println("eleSet1中的元素："+jedis.smembers("eleSet1"));
        System.out.println("eleSet3中的元素："+jedis.smembers("eleSet3"));
        System.out.println("============集合運算=================");
        System.out.println("eleSet1中的元素："+jedis.smembers("eleSet1"));
        System.out.println("eleSet2中的元素："+jedis.smembers("eleSet2"));
        System.out.println("eleSet1和eleSet2的交 集:"+jedis.sinter("eleSet1","eleSet2"));
        System.out.println("eleSet1和eleSet2的並 集:"+jedis.sunion("eleSet1","eleSet2"));
        System.out.println("eleSet1和eleSet2的差 集:"+jedis.sdiff("eleSet1","eleSet2"));//eleSet1中有，eleSet2中沒有
        jedis.sinterstore("eleSet4","eleSet1","eleSet2");//求交集並將交集保存到dstkey的集合
        System.out.println("eleSet4中的元素："+jedis.smembers("eleSet4"));
    }
}

四、List操作

package com.study;

import redis.clients.jedis.Jedis;

public class TestList {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("192.168.137.4", 6379);
        jedis.flushDB();
        System.out.println("===========添加一個list===========");
        jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");
        jedis.lpush("collections", "HashSet");
        jedis.lpush("collections", "TreeSet");
        jedis.lpush("collections", "TreeMap");
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));//-1代表倒數第一個元素，-2代表倒數第二個元素,end為-1表示查詢全部
        System.out.println("collections區間0-3的元 素："+jedis.lrange("collections",0,3));
        System.out.println("===============================");
        // 刪除列表指定的值 ，第二個參數為刪除的個數（有重復時），后add進去的值先被刪，類似於出棧
        System.out.println("刪除指定元素個數："+jedis.lrem("collections", 2, "HashMap"));
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));
        System.out.println("刪除下表0-3區間之外的元 素："+jedis.ltrim("collections", 0, 3));
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));
        System.out.println("collections列表出棧（左 端）："+jedis.lpop("collections"));
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));
        System.out.println("collections添加元素，從列表右端，與lpush相對 應："+jedis.rpush("collections", "EnumMap"));
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));
        System.out.println("collections列表出棧（右 端）："+jedis.rpop("collections"));
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));
        System.out.println("修改collections指定下標1的內 容："+jedis.lset("collections", 1, "LinkedArrayList"));
        System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));
        System.out.println("===============================");
        System.out.println("collections的長度："+jedis.llen("collections"));
        System.out.println("獲取collections下標為2的元 素："+jedis.lindex("collections", 2));
        System.out.println("===============================");
        jedis.lpush("sortedList", "3","6","2","0","7","4");
        System.out.println("sortedList排序前："+jedis.lrange("sortedList", 0, -1));
        System.out.println(jedis.sort("sortedList"));
        System.out.println("sortedList排序后："+jedis.lrange("sortedList", 0, -1));
    }
}

五、Hash操作

package com.study;

import redis.clients.jedis.Jedis;

import java.util.HashMap;
import java.util.Map;

public class TestHash {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("192.168.137.4", 6379);
        jedis.flushDB();
        Map<String,String> map = new HashMap<>();
        map.put("key1","value1");
        map.put("key2","value2");
        map.put("key3","value3");
        map.put("key4","value4");
        //添加名稱為hash（key）的hash元素
        jedis.hmset("hash",map);
        //向名稱為hash的hash中添加key為key5，value為value5元素
        jedis.hset("hash", "key5", "value5");
        System.out.println("散列hash的所有鍵值對 為："+jedis.hgetAll("hash"));//return Map<String,String>
        System.out.println("散列hash的所有鍵為："+jedis.hkeys("hash"));//return Set<String>
        System.out.println("散列hash的所有值為："+jedis.hvals("hash"));//return List<String>
        System.out.println("將key6保存的值加上一個整數，如果key6不存在則添加 key6："+jedis.hincrBy("hash", "key6", 6));
        System.out.println("散列hash的所有鍵值對為："+jedis.hgetAll("hash"));
        System.out.println("將key6保存的值加上一個整數，如果key6不存在則添加 key6："+jedis.hincrBy("hash", "key6", 3));
        System.out.println("散列hash的所有鍵值對為："+jedis.hgetAll("hash"));
        System.out.println("刪除一個或者多個鍵值對："+jedis.hdel("hash", "key2"));
        System.out.println("散列hash的所有鍵值對為："+jedis.hgetAll("hash"));
        System.out.println("散列hash中鍵值對的個數："+jedis.hlen("hash"));
        System.out.println("判斷hash中是否存在 key2："+jedis.hexists("hash","key2"));
        System.out.println("判斷hash中是否存在 key3："+jedis.hexists("hash","key3"));
        System.out.println("獲取hash中的值："+jedis.hmget("hash","key3"));
        System.out.println("獲取hash中的 值："+jedis.hmget("hash","key3","key4"));
    }
}

Redis整合springboot

1、新建一個springboot web項目

2、導入相關依賴

<!--redis-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!--springboot集成redis所需的commnos-pool2依賴-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

3、編寫controller層

package com.study.redis_springboot.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/redisTest")
public class RedisTestController {
    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping
    public String testRedis(){
        //opsForValue 操作字符串
        //opsForList 操作list
        //opsForSet  操作set
        //opsForHash 操作hash
        //除了基本的操作，我們常用的方法都可以直接通過redisTemplate操作，比如事務和基本的CRUD
        redisTemplate.opsForValue().set("name","lucy");
        String name = (String) redisTemplate.opsForValue().get("name");
        return name;
    }
}

4、啟動測試