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本篇內容主要講解“怎么遠程連接Jedis”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實用性強。下面就讓小編來帶大家學習“怎么遠程連接Jedis”吧!
一、遠程連接Jedis
1、導入Jedis所需的jar包
2、遠程連接Redis注意事項
3、Jedis測試遠程連接
4、常用的數據類型
5、Jedis實現事務
二、整合SpringBoot
1、導入依賴
2、配置連接
3、測試連接
4、序列化
5、自定義序列化
6、自定義工具類
7、再次進行測試
<dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.62</version> </dependency>
禁用Linux的防火墻：systemctl stop/disable firewalld.service
在配置文件redis.conf中注釋掉bind 127.0.0.1 ,然后修改protected-mode no
package com.hcz;
import redis.clients.jedis.Jedis;
public class TestPing {
public static void main(String[] args) {
Jedis jedis = new Jedis("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
jedis.close();
}
}
（1）Key
package com.hcz;
import redis.clients.jedis.Jedis;
import java.util.Set;
public class TestKey {
public static void main(String[] args) {
Jedis jedis = new Jedis("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
System.out.println("判斷某個鍵知否存在："+jedis.exists("username"));
System.out.println("新增<'username','hcz'>的鍵值對"+jedis.set("username","hcz"));
System.out.println("新增<'password','123'>的鍵值對"+jedis.set("password","123"));
System.out.println("系統中所有的鍵如下：");
Set<String> keys = jedis.keys("*");
System.out.println(keys);
System.out.println("獲取username的值："+jedis.get("username"));
System.out.println("獲取password的值："+jedis.get("password"));
System.out.println("刪除鍵password"+jedis.del("password"));
System.out.println("判斷password是否存在："+jedis.exists("password"));
System.out.println("查看鍵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","newname"));
System.out.println("取出重命名后的newname:"+jedis.get("newname"));
System.out.println("按索引查詢："+jedis.select(0));
System.out.println("清空當前數據庫所有的key："+jedis.flushDB());
System.out.println("返回當前數據庫中key的數目："+jedis.dbSize());
System.out.println("刪除所有數據庫中的key："+jedis.flushAll());
jedis.close();
}
}
（2）String
package com.hcz;
import redis.clients.jedis.Jedis;
import java.util.Set;
import java.util.concurrent.TimeUnit;
public class TestString {
public static void main(String[] args) {
Jedis jedis = new Jedis("139.196.236.217",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
System.out.println("====增加數據====");
System.out.println(jedis.set("k1","v1"));
System.out.println(jedis.set("k2","v2"));
System.out.println(jedis.set("k3","v3"));
System.out.println("刪除鍵k2:"+jedis.del("k2"));
System.out.println("獲取鍵k2:"+jedis.get("k2"));
System.out.println("獲取鍵k1:"+jedis.get("k1"));
System.out.println("修改鍵k3:"+jedis.set("k3","new_v3"));
System.out.println("獲取k3的值："+jedis.get("k3"));
System.out.println("在k3后面加值："+jedis.append("k3","End"));
System.out.println("獲取k3的值："+jedis.get("k3"));
System.out.println("增加多個鍵值對："+jedis.mset("k4","v4","k5","v5"));
System.out.println("獲取多個鍵值對："+jedis.mget("k3","k4","k5"));
System.out.println("刪除多個鍵值對："+jedis.del("k1","k3"));
System.out.println("清空數據："+jedis.flushDB());
System.out.println("====新增鍵值對防止覆蓋原先值====");
System.out.println(jedis.setnx("k1","v1"));
System.out.println(jedis.setnx("k2","v2"));
System.out.println(jedis.setnx("k2","v2-new"));
System.out.println("獲取k1的值"+jedis.get("k1"));
System.out.println("獲取k2的值"+jedis.get("k2"));
System.out.println("====新增鍵值并設置有效時間====");
System.out.println(jedis.setex("k3",2,"v3"));
System.out.println("第一次獲取k3的值"+jedis.get("k3"));
try {
TimeUnit.SECONDS.sleep(3);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("第二次獲取k3的值"+jedis.get("k3"));
System.out.println("====獲取原值，更新為新值=====");
System.out.println(jedis.getSet("k2","k2-getset"));
System.out.println(jedis.get("k2"));
System.out.println("獲得k2的值的字串："+jedis.getrange("k2",2,4));
jedis.close();
}
}
（3）List
package com.hcz;
import redis.clients.jedis.Jedis;
public class TestList {
public static void main(String[] args) {
Jedis jedis = new Jedis("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
System.out.println("====增加一個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));
System.out.println("collections區間的0-3號元素："+jedis.lrange("collections",0,3));
System.out.println("===========================");
//刪除指定的值，第二個參數為刪除的個數（有重復時），后add進去的值先被刪除，類似出棧
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("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","List","Set","String"));
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指定下標為1的內容："+jedis.lset("collections",1,"newHashSet"));
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("sortList","3","5","2","8","6","0");
System.out.println("sortList排序前："+jedis.lrange("sortList",0,-1));
System.out.println(jedis.sort("sortList"));
System.out.println("sortList排序后："+jedis.lrange("sortList",0,-1));
jedis.close();
}
}
（4）Set
package com.hcz;
import redis.clients.jedis.Jedis;
import java.util.Set;
public class TestSet {
public static void main(String[] args) {
Jedis jedis = new Jedis("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
System.out.println("==========向集合中添加元素（不重復）");
System.out.println(jedis.sadd("eleSet","e1","e0","e3","e6","e5","e7","e8"));
System.out.println(jedis.sadd("eleSet","e4"));
System.out.println(jedis.sadd("eleSet","e4"));
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("刪除二個元素e7，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的元素個數為："+jedis.scard("eleSet"));
System.out.println("e3是否存在eleSet中："+jedis.sismember("eleSet","e3"));
System.out.println("e1是否存在eleSet中："+jedis.sismember("eleSet","e1"));
System.out.println("e5是否存在eleSet中："+jedis.sismember("eleSet","e5"));
System.out.println("==============================");
System.out.println(jedis.sadd("eleSet1","e1","e0","e3","e6","e5","e7","e8"));
System.out.println(jedis.sadd("eleSet2","e1","e0","e3","e6","e8"));
System.out.println("將eleSet1刪除e1并存入eleSet3中："+jedis.smove("eleSet1","eleSet3","e1"));
System.out.println("將eleSet1刪除e2并存入eleSet3中："+jedis.smove("eleSet1","eleSet3","e2"));
System.out.println("eleSet1的所有元素為："+jedis.smembers("eleSet1"));
System.out.println("eleSet3的所有元素為："+jedis.smembers("eleSet3"));
System.out.println("================集合運算===============");
System.out.println("eleSet1的所有元素為："+jedis.smembers("eleSet1"));
System.out.println("eleSet2的所有元素為："+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"));
jedis.sinterstore("eleSet4","eleSet1","eleSet2");//求交集并保存到eleSet4中
System.out.println("eleSet4的所有元素為："+jedis.smembers("eleSet4"));
jedis.close();
}
}
（5）Hash
package com.hcz;
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("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
Map<String,String> map = new HashMap<>();
map.put("key1","v1");
map.put("key2","v2");
map.put("key3","v3");
map.put("key4","v4");
//添加名稱為hash的hash元素
jedis.hmset("hash",map);
//向名稱為hash的hash中添加key為key5,value為v5元素
jedis.hset("hash","key5","v5");
System.out.println("散列hash的所有鍵值對為："+jedis.hgetAll("hash"));
System.out.println("散列hash的所有鍵為："+jedis.hkeys("hash"));
System.out.println("散列hash的所有值為："+jedis.hvals("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",4));
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","key4"));
System.out.println("散列hash的所有鍵值對為："+jedis.hgetAll("hash"));
System.out.println("散列hash的所有鍵值對個數為："+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.hget("hash","key3"));
System.out.println("獲取hash中的值："+jedis.hmget("hash","key3","key5"));
jedis.close();
}
}
（1）事務正常執行
public class TestMulti {
public static void main(String[] args) {
Jedis jedis = new Jedis("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
JSONObject jsonObject = new JSONObject();
jsonObject.put("hello","world");
jsonObject.put("name","hcz");
//開啟事務
Transaction multi = jedis.multi();
String result = jsonObject.toJSONString();
try {
multi.set("user1",result);
multi.set("user2",result);
multi.exec();//執行事務
}catch (Exception e){
multi.discard();//放棄事務
e.printStackTrace();
}finally {
System.out.println("user1為："+jedis.get("user1"));
System.out.println("user2為："+jedis.get("user2"));
jedis.close();//關閉連接
}
}
}
（2）事務編譯時異常
public class TestMulti {
public static void main(String[] args) {
Jedis jedis = new Jedis("49.236.195.225",6379);
System.out.println("連接成功："+jedis.ping());
System.out.println("清空數據："+jedis.flushDB());
JSONObject jsonObject = new JSONObject();
jsonObject.put("hello","world");
jsonObject.put("name","hcz");
//開啟事務
Transaction multi = jedis.multi();
String result = jsonObject.toJSONString();
try {
multi.set("user1",result);
multi.set("user2",result);
int i = 1/0;//代碼拋出異常事務，執行失敗
multi.exec();//執行事務
}catch (Exception e){
multi.discard();//放棄事務
e.printStackTrace();
}finally {
System.out.println("user1為："+jedis.get("user1"));
System.out.println("user2為："+jedis.get("user2"));
jedis.close();//關閉連接
}
}
}
說明：
在SpringBoot2.x之后，原來使用的jedis被替換為了lettuce
jedis：采用直連，多個線程操作的話是不安全的，如果想要避免不安全，可以使用 jedis pool連接池！更像BIO模式lettuce：采用netty，實例可以再多個線程共享，不存在線程不安全的情況，可以減少線程數據！更像NIO模式
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency>
spring: redis: host: 49.236.195.225 #遠程主機名 port: 6379 #端口號 jedis: pool: max-active: 8 max-wait: -1ms max-idle: 500 min-idle: 0 lettuce: shutdown-timeout: 0ms
@SpringBootTest
class SpringbootRedisApplicationTests {
@Autowired
private RedisTemplate redisTemplate;
@Test
void contextLoads() {
//redisTemplate
//opsForValue 操作字符串 類似String
//opsForList 操作List 類型List
//opsForSet
//opsForHash
//opsForZSet
//opsForGeo
//opsForHyperLogLog
//獲取連接對象
RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
connection.flushDb();
//connection.flushAll();
redisTemplate.opsForValue().set("myKey","myValue");
System.out.println(redisTemplate.opsForValue().get("myKey"));
}
}
@Component
@AllArgsConstructor
@NoArgsConstructor
@Data
//在企業中，我們所有的pojo都會序列化
public class User implements Serializable {
private String name;
private int age;
}@Autowired
private RedisTemplate redisTemplate;
@Test
public void test(){
try {
//真實開發一般使用json來傳遞對象
User user = new User("張三 ", 18);
//String jsonUser = new ObjectMapper().writeValueAsString(user);
redisTemplate.opsForValue().set("user",user);
System.out.println(redisTemplate.opsForValue().get("user"));
} catch (JsonProcessingException e) {
e.printStackTrace();
}
}
@Configuration
public class RedisConfig {
//自定義了一個RedisTemplate
@Bean
@SuppressWarnings("all")
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
//為了開發方便，一般使用<String, Object>
RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
template.setConnectionFactory(factory);
//Json序列化配置
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
//String的序列化
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
// key采用String的序列化方式
template.setKeySerializer(stringRedisSerializer);
// hash的key也采用String的序列化方式
template.setHashKeySerializer(stringRedisSerializer);
// value序列化方式采用jackson
template.setValueSerializer(jackson2JsonRedisSerializer);
// hash的value序列化方式采用jackson
template.setHashValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}自定義工具類的好處：
已經幫我們將原生的redisTemplate.opsForValue().set() 復雜命令封裝成一些簡單的命令
@Component
public final class RedisUtil {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
// =============================common============================
/**
* 指定緩存失效時間
* @param key 鍵
* @param time 時間(秒)
*/
public boolean expire(String key, long time) {
try {
if (time > 0) {
redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
…………省略后面一大堆代碼…………@Autowired
private RedisUtil redisUtil;
@Test
public void test2(){
redisUtil.set("username","hcz");
System.out.println(redisUtil.get("username"));
redisUtil.hset("hash","age",18);
System.out.println(redisUtil.hget("hash","age"));
redisUtil.hincr("hash","age",5);
System.out.println(redisUtil.hget("hash","age"));
}
到此，相信大家對“怎么遠程連接Jedis”有了更深的了解，不妨來實際操作一番吧！這里是億速云網站，更多相關內容可以進入相關頻道進行查詢，關注我們，繼續學習！
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