首先项目A，也就是SpringBOOT项目中使用redisTemplate 来做REDIS的缓存时，你会发现存到REDIS里边的KEY和VALUE，redisTemplat使用jdkSerializeable存储二进制字节编码
项目B中使用jedis时，存储起来的是字符串，导致项目A要调用项目缓存的键值对时，获取不到
解决方案：
修改项目A的redisTemplate的序列方式
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {
/**
* redis模板，存储关键字是字符串，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类型的话，会报类型转换错误；
RedisSerializer<String> redisSerializer = new StringRedisSerializer();//Long类型不可以会出现异常信息;
redisTemplate.setKeySerializer(redisSerializer);
redisTemplate.setHashKeySerializer(redisSerializer);
//默认使用JdkSerializationRedisSerializer序列化方式;会出现乱码，改成StringRedisSerializer
StringRedisSerializer stringSerializer = new StringRedisSerializer();
redisTemplate.setKeySerializer(stringSerializer);
redisTemplate.setValueSerializer(stringSerializer);
redisTemplate.setHashKeySerializer(stringSerializer);
redisTemplate.setHashValueSerializer(stringSerializer);
return redisTemplate;
}
}
补充：RedisTemplate初始化和创建(非Spring注入方式)
概述
在工作中, 可能会在非Spring项目(如Spark,Flink作业)中去操作Redis, 重复造轮子去写工具类没有太大的意义, 使用RedisTemplate已经足够丰富和完善了,使用New的方式进行创建即可, 不同的spring-data-redis的版本会略有不同, 下面以2.3.0和1.8.9做为示例.
2.3.0
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>
代码
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) {
//单机模式
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<>();
//单机模式
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);
}
}
集群方式运行报错
Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: ERR This instance has cluster support disabled
解决
在redis.conf下将cluster-enabled改为yes
如果只有一个节点, 改为单机模式
1.8.9
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>
代码
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);
}
}
这里有个小细节, 如果不调用setShardInfo()方法, 那么需要执行下面的代码, afterPropertiesSet()用来初始化
JedisConnectionFactory fac = new JedisConnectionFactory(new JedisPoolConfig());
fac.setPort(6379);
fac.setPassword("123456");
fac.setHostName("192.168.1.1");
fac.afterPropertiesSet();
说明
RedisTemplate的构造方法有多种, 上面所举例子为其中的一种; 不通过SpringBoot自动装配的方式, 必须手动去执行afterPropertiesSet()进行初始化; 可参考SpringBoot整合redis的方式, 查看对应实现
以上为个人经验，希望能给大家一个参考，也希望大家多多支持免费资源网。如有错误或未考虑完全的地方，望不吝赐教。
