JAVA中 redisTemplate 和 jedis的配合使用操作

首先項目A，也就是SpringBOOT項目中使用redisTemplate 來做REDIS的緩存時，你會發現存到REDIS里邊的KEY和VALUE，redisTemplat使用jdkSerializeable存儲二進制字節編碼

項目B中使用jedis時，存儲起來的是字符串，導致項目A要調用項目緩存的鍵值對時，獲取不到

修改項目A的redisTemplate的序列方式

@Configuration@EnableCachingpublic class RedisConfig extends CachingConfigurerSupport { /** * redis模板，存儲關鍵字是字符串，值是Jdk序列化 * @param factory * @return * @Description: */ @Bean public RedisTemplate<?, ?> redisTemplate(RedisConnectionFactory factory) { RedisTemplate<?, ?> redisTemplate = new RedisTemplate<>(); redisTemplate.setConnectionFactory(factory); //key序列化方式;但是如果方法上有Long等非String類型的話，會報類型轉換錯誤； RedisSerializer<String> redisSerializer = new StringRedisSerializer();//Long類型不可以會出現異常信息; redisTemplate.setKeySerializer(redisSerializer); redisTemplate.setHashKeySerializer(redisSerializer); //默認使用JdkSerializationRedisSerializer序列化方式;會出現亂碼，改成StringRedisSerializer StringRedisSerializer stringSerializer = new StringRedisSerializer(); redisTemplate.setKeySerializer(stringSerializer); redisTemplate.setValueSerializer(stringSerializer); redisTemplate.setHashKeySerializer(stringSerializer); redisTemplate.setHashValueSerializer(stringSerializer); return redisTemplate; }}

補充：RedisTemplate初始化和創建(非Spring注入方式)

在工作中, 可能會在非Spring項目(如Spark,Flink作業)中去操作Redis, 重復造輪子去寫工具類沒有太大的意義, 使用RedisTemplate已經足夠豐富和完善了,使用New的方式進行創建即可, 不同的spring-data-redis的版本會略有不同, 下面以2.3.0和1.8.9做為示例.

maven

<dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>2.3.0.RELEASE</version></dependency><dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.3.0</version></dependency>

代碼

import org.springframework.data.redis.connection.RedisClusterConfiguration;import org.springframework.data.redis.connection.RedisNode;import org.springframework.data.redis.connection.RedisStandaloneConfiguration;import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.data.redis.core.ValueOperations;import java.util.Collections;import java.util.List;import java.util.Objects;public class RedisTest { public static void main(String[] args) { //單機模式 RedisStandaloneConfiguration rsc = new RedisStandaloneConfiguration(); rsc.setPort(6379); rsc.setPassword('123456'); rsc.setHostName('192.168.1.1'); //集群模式 RedisClusterConfiguration rcc = new RedisClusterConfiguration(); rcc.setPassword('123456'); List<RedisNode> nodes = Collections.singletonList(new RedisNode('192.168.1.1', 6379)); rcc.setClusterNodes(nodes); RedisTemplate<String, String> template = new RedisTemplate<>(); //單機模式 JedisConnectionFactory fac = new JedisConnectionFactory(rsc); //集群模式 //JedisConnectionFactory fac = new JedisConnectionFactory(rcc); fac.afterPropertiesSet(); template.setConnectionFactory(fac); template.setDefaultSerializer(new StringRedisSerializer()); template.afterPropertiesSet(); ValueOperations<String, String> op = template.opsForValue(); final String key = '123_tmp'; final String value = 'abc'; template.delete(key); op.set(key, value); assert Objects.equals(op.get(key), value); }}

集群方式運行報錯

Exception in thread 'main' redis.clients.jedis.exceptions.JedisDataException: ERR This instance has cluster support disabled

在redis.conf下將cluster-enabled改為yes

如果只有一個節點, 改為單機模式

maven

<dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.8.9.RELEASE</version></dependency><dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.9.0</version></dependency>

代碼

import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.data.redis.core.ValueOperations;import redis.clients.jedis.JedisPoolConfig;import redis.clients.jedis.JedisShardInfo;import java.util.Objects;public class RedisTest { public static void main(String[] args) { RedisTemplate<String, String> template = new RedisTemplate<>(); JedisConnectionFactory fac = new JedisConnectionFactory(new JedisPoolConfig()); JedisShardInfo shardInfo = new JedisShardInfo('192.168.1.1', 6379); shardInfo.setPassword('123456'); fac.setShardInfo(shardInfo); template.setConnectionFactory(fac); template.setDefaultSerializer(new StringRedisSerializer()); template.afterPropertiesSet(); ValueOperations<String, String> op = template.opsForValue(); final String key = '123_tmp'; final String value = 'abc'; template.delete(key); op.set(key, value); assert Objects.equals(op.get(key), value); }}

這里有個小細節, 如果不調用setShardInfo()方法, 那么需要執行下面的代碼, afterPropertiesSet()用來初始化

JedisConnectionFactory fac = new JedisConnectionFactory(new JedisPoolConfig()); fac.setPort(6379); fac.setPassword('123456'); fac.setHostName('192.168.1.1'); fac.afterPropertiesSet();說明

RedisTemplate的構造方法有多種, 上面所舉例子為其中的一種; 不通過SpringBoot自動裝配的方式, 必須手動去執行afterPropertiesSet()進行初始化; 可參考SpringBoot整合redis的方式, 查看對應實現

以上為個人經驗，希望能給大家一個參考，也希望大家多多支持好吧啦網。如有錯誤或未考慮完全的地方，望不吝賜教。