不会吧不会吧,不会现在还有人不会整合redis和springboot吧!!!

Redis——通过jedis操作和整合springboot

Jedis项目搭建

Jedis是Redis官方推荐的Java连接开发工具。要在Java开发中使用好Redis中间件,必须对Jedis熟悉才能
写成漂亮的代码

1、导入相关依赖

    <dependencies>
        <!--导入jedis包-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.6.0</version>
        </dependency>
         <!--加群1025684353一起吹水聊天-->
        <!--导入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

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# 应用名称
spring.application.name=redis_springboot
#Redis服务器地址
spring.redis.host=192.168.137.4
#Redis服务器连接端口
spring.redis.port=6379
#Redis数据库索引(默认为0)
# 加群1025684353一起吹水聊天-->
spring.redis.database= 0
#连接超时时间(毫秒)
spring.redis.timeout=1800000
#连接池最大连接数(使用负值表示没有限制)
spring.redis.lettuce.pool.max-active=20
#最大阻塞等待时间(负数表示没限制)
spring.redis.lettuce.pool.max-wait=-1
#连接池中的最大空闲连接
spring.redis.lettuce.pool.max-idle=5
#连接池中的最小空闲连接
spring.redis.lettuce.pool.min-idle=0

3、编写测试类测试是否ping成功

注意:必须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) {
    	// 加群1025684353一起吹水聊天-->
        //1.new Jedis对象
        Jedis jedis = new Jedis("192.168.137.4",6379);
        System.out.println(jedis.ping());
    }
}

Jedis常用API

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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);
		 //加群1025684353一起吹水聊天-->
        System.out.println("清空数据:"+jedis.flushDB());
        System.out.println("判断某个键是否存在:"+jedis.exists("username"));
        System.out.println("新增<username,zhangsan>的键值对:"+jedis.set("username","zhangsan"));
        System.out.println("新增<password,password>的键值对:"+jedis.set("password","password"));
        System.out.println("查看所有的key:"+jedis.keys("*"));
        System.out.println("删除key键password:"+jedis.del("password"));
        System.out.println("判断key键password是否存在:"+jedis.exists("password"));
        System.out.println("查看username所存储的值的类型:"+jedis.type("username"));
        System.out.println("随机返回key空间的一个:"+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("按索引切换数据库:"+jedis.select(0));
        System.out.println("清空数据库:"+jedis.flushDB());
        System.out.println("返回当前数据库中key的数目:"+jedis.dbSize());
        System.out.println("清空所有数据库:"+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);
         //加群1025684353一起吹水聊天-->

        jedis.flushDB();
        System.out.println("========添加数据=======");
        System.out.println(jedis.set("key1","value1"));
        System.out.println(jedis.set("key2","value2"));
        System.out.println(jedis.set("key3","value3"));
        System.out.println("删除键key2:"+jedis.del("key2"));
        System.out.println("获取键key2:"+jedis.get("key2"));
        System.out.println("修改key1:"+jedis.set("key1","value1Changed"));
        System.out.println("获取key1的值:"+jedis.get("key1"));
        System.out.println("添加多个键值对:"+jedis.mset("key01","value01","key02","value02","key03","value03"));
        System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03"));
        System.out.println("删除多个键值对:"+jedis.del("key01","key02"));
        //加群1025684353一起吹水聊天-->

        jedis.flushDB();
        System.out.println("========新增键值对防止覆盖原先值========");
        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("获取多个键值对的值"+jedis.mget("key1","key2"));

        System.out.println("========新增键值对并设置有效时间==========");
        System.out.println(jedis.setex("key3",2,"value3")); //有效时间为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("========获取原值,更新为新值=======");
        System.out.println(jedis.getSet("key2","key2GetSet"));
        System.out.println(jedis.get("key2"));

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

三、set操作

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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();
         //加群1025684353一起吹水聊天-->
        System.out.println("============向集合中添加元素(不重复)============");
        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的所有元素为:"+jedis.smembers("eleSet"));
        System.out.println("删除一个元素e0:"+jedis.srem("eleSet", "e0"));
        System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));
        System.out.println("删除两个元素e7和e6:"+jedis.srem("eleSet", "e7","e6"));
        System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));
        System.out.println("随机的移除集合中的一个元素:"+jedis.spop("eleSet"));
        System.out.println("随机的移除集合中的一个元素:"+jedis.spop("eleSet"));
        System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));
        System.out.println("eleSet中包含元素的个数:"+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("将eleSet1中删除e1并存入eleSet3 中:"+jedis.smove("eleSet1", "eleSet3", "e1"));//移到集合元素
        System.out.println("将eleSet1中删除e2并存入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("============集合运算=================");
        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的并 集:"+jedis.sunion("eleSet1","eleSet2"));
        System.out.println("eleSet1和eleSet2的差 集:"+jedis.sdiff("eleSet1","eleSet2"));//eleSet1中有,eleSet2中没有
        jedis.sinterstore("eleSet4","eleSet1","eleSet2");//求交集并将交集保存到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();
         //加群1025684353一起吹水聊天-->
        System.out.println("===========添加一个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的内容:"+jedis.lrange("collections", 0, -1));//-1代表倒数第一个元素,-2代表倒数第二个元素,end为-1表示查询全部
        System.out.println("collections区间0-3的元 素:"+jedis.lrange("collections",0,3));
        System.out.println("===============================");
        // 删除列表指定的值 ,第二个参数为删除的个数(有重复时),后add进去的值先被删,类似于出栈
        System.out.println("删除指定元素个数:"+jedis.lrem("collections", 2, "HashMap"));
        System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));
        System.out.println("删除下表0-3区间之外的元 素:"+jedis.ltrim("collections", 0, 3));
        System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));
        System.out.println("collections列表出栈(左 端):"+jedis.lpop("collections"));
        System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));
        System.out.println("collections添加元素,从列表右端,与lpush相对 应:"+jedis.rpush("collections", "EnumMap"));
        System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));
        System.out.println("collections列表出栈(右 端):"+jedis.rpop("collections"));
        System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));
        System.out.println("修改collections指定下标1的内 容:"+jedis.lset("collections", 1, "LinkedArrayList"));
        System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));
        System.out.println("===============================");
        System.out.println("collections的长度:"+jedis.llen("collections"));
        System.out.println("获取collections下标为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));
    }
}

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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");
        //添加名称为hash(key)的hash元素
         //加群1025684353一起吹水聊天-->
        jedis.hmset("hash",map);
        //向名称为hash的hash中添加key为key5,value为value5元素
        jedis.hset("hash", "key5", "value5");
        System.out.println("散列hash的所有键值对 为:"+jedis.hgetAll("hash"));//return Map<String,String>
        System.out.println("散列hash的所有键为:"+jedis.hkeys("hash"));//return Set<String>
        System.out.println("散列hash的所有值为:"+jedis.hvals("hash"));//return List<String>
        System.out.println("将key6保存的值加上一个整数,如果key6不存在则添加 key6:"+jedis.hincrBy("hash", "key6", 6));
        System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));
        System.out.println("将key6保存的值加上一个整数,如果key6不存在则添加 key6:"+jedis.hincrBy("hash", "key6", 3));
        System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));
        System.out.println("删除一个或者多个键值对:"+jedis.hdel("hash", "key2"));
        System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));
        System.out.println("散列hash中键值对的个数:"+jedis.hlen("hash"));
        System.out.println("判断hash中是否存在 key2:"+jedis.hexists("hash","key2"));
        System.out.println("判断hash中是否存在 key3:"+jedis.hexists("hash","key3"));
        System.out.println("获取hash中的值:"+jedis.hmget("hash","key3"));
        System.out.println("获取hash中的 值:"+jedis.hmget("hash","key3","key4"));
    }
}

Redis整合springboot

1、新建一个springboot web项目

image

2、导入相关依赖

<!--redis-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
 <!--加群1025684353一起吹水聊天-->
<!--springboot集成redis所需的commnos-pool2依赖-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

3、编写controller层

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(){
    	// 加群1025684353一起吹水聊天-->
        //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,我们常用的方法都可以直接通过redisTemplate操作,比如事务和基本的CRUD
        redisTemplate.opsForValue().set("name","lucy");
        String name = (String) redisTemplate.opsForValue().get("name");
        return name;
    }
}

4、启动测试

image

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版权声明:本文为qq_36972826原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接和本声明。