Springboot配置多个redis的方法示例
Spring Data提供其他项目,用来帮你使用各种各样的NOSQL技术,包括MongoDB, Neo4J, Elasticsearch, Solr, redis,Gemfire, Couchbase和Cassandra。Spring Boot为Redis, MongoDB, Elasticsearch, Solr和Gemfire提供自动配置。你可以充分利用其他项目,但你需要自己配置它们。
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单个 RedisTemplate 的配置
使用 spring-boot-starter-data-redis 配置一个 redis 是很简单的。
pom.xml 中该引入的依赖是要引入的,下面的是完整的 pom.xml
<?xml version="1.0" encoding="UTF-8"?>4.0.0 me.deweixu muti-redis 0.0.1-SNAPSHOT jar muti-redis config mutiple redis host org.springframework.boot spring-boot-starter-parent 2.0.4.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter-data-redis org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
application.properties
文件增加相关的配置
spring.redis.host=localhost spring.redis.port=6379
简单的配置就是这样的,还有一些有关连接池或其他的详细配置可以在 common-application-properties 中参考,或者直接查看 RedisProperties 类。
这里使用 redis
的例子我就直接在主类中示例了。
package me.deweixu.mutiredis; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.CommandLineRunner; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.data.redis.core.BoundValueOperations; import org.springframework.data.redis.core.StringRedisTemplate; @SpringBootApplication public class MutiRedisApplication implements CommandLineRunner { @Autowired StringRedisTemplate stringRedisTemplate; @Override public void run(String... args) throws Exception { BoundValueOperations op = stringRedisTemplate.boundValueOps("PERSON"); op.set("Deweixu"); } public static void main(String[] args) { SpringApplication.run(MutiRedisApplication.class, args); } }
直接运行起来,然后去 redis 查看结果:
$ redis-cli 127.0.0.1:6379> keys * 1) "PERSON" 127.0.0.1:6379> get PERSON "Deweixu" 127.0.0.1:6379>
没问题的,顺利的把数据存入到了 redis 中。
自定义 RedisTemplate 的序列类
上面的实现其实有一个问题,就是 redis 的 key 和 value 只能是 String 类型的,是 redis-starter 默认实现了的一个 StringRedisTemplate。查看其源代码是这样的
public StringRedisTemplate() { RedisSerializerstringSerializer = new StringRedisSerializer(); this.setKeySerializer(stringSerializer); this.setValueSerializer(stringSerializer); this.setHashKeySerializer(stringSerializer); this.setHashValueSerializer(stringSerializer); }
如果使用 StringRedisTemplate
存入一个对象是要报错的,我们修改一下代码试试:
@Autowired StringRedisTemplate stringRedisTemplate; @Override public void run(String... args) throws Exception { BoundValueOperations op = stringRedisTemplate.boundValueOps("PERSON"); op.set(new Person("Deiweixu", 22)); } public static void main(String[] args) { SpringApplication.run(MutiRedisApplication.class, args); }
运行就报错如下:
Caused by: java.lang.ClassCastException: me.deweixu.mutiredis.MutiRedisApplication$Person cannot be cast to java.base/java.lang.String
at org.springframework.data.redis.serializer.StringRedisSerializer.serialize(StringRedisSerializer.java:35) ~[spring-data-redis-2.0.9.RELEASE.jar:2.0.9.RELEASE]
at org.springframework.data.redis.core.AbstractOperations.rawValue(AbstractOperations.java:126) ~[spring-data-redis-2.0.9.RELEASE.jar:2.0.9.RELEASE]
at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:197) ~[spring-data-redis-2.0.9.RELEASE.jar:2.0.9.RELEASE]
at org.springframework.data.redis.core.DefaultBoundValueOperations.set(DefaultBoundValueOperations.java:110) ~[spring-data-redis-2.0.9.RELEASE.jar:2.0.9.RELEASE]
at me.deweixu.mutiredis.MutiRedisApplication.run(MutiRedisApplication.java:19) [classes/:na]
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
... 5 common frames omitted
这样我们可以自己配置一下序列化类,这里我们把对象序列化为一个 json 存入到 redis 中
@Bean JedisConnectionFactory jedisConnectionFactory() { return new JedisConnectionFactory(); } @Bean RedisTemplatefirstRedisTemplate() { RedisTemplate redisTemplate = new RedisTemplate<>(); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer(om); redisTemplate.setKeySerializer(new StringRedisSerializer()); redisTemplate.setValueSerializer(genericJackson2JsonRedisSerializer); redisTemplate.setHashKeySerializer(new StringRedisSerializer()); redisTemplate.setHashValueSerializer(genericJackson2JsonRedisSerializer); redisTemplate.setConnectionFactory(jedisConnectionFactory()); return redisTemplate; } @Autowired RedisTemplate redisTemplate; @Override public void run(String... args) throws Exception { BoundValueOperations op = redisTemplate.boundValueOps("PERSON"); People people = new People(); people.setAge(26); people.setName("Deweixu"); op.set(people); People getPeople = (People) op.get(); System.out.println(getPeople.getName() + "," + getPeople.getAge()); }
上面使用了 Jedis 的配置和 GenericJackson2JsonRedisSerializer 类,所以 maven 要引入依赖
com.fasterxml.jackson.core jackson-databind 2.9.0 redis.clients jedis
这样运行可以看到 redis 中变成这样了:
127.0.0.1:6379> get PERSON "[\"me.deweixu.mutiredis.entity.People\",{\"name\":\"Deweixu\",\"age\":26}]" 127.0.0.1:6379>
配置另外一个 redisTemplate
@Bean RedisTemplatesecondRedisTemplate() { RedisTemplate redisTemplate = new RedisTemplate<>(); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer(om); redisTemplate.setKeySerializer(new StringRedisSerializer()); redisTemplate.setValueSerializer(genericJackson2JsonRedisSerializer); redisTemplate.setHashKeySerializer(new StringRedisSerializer()); redisTemplate.setHashValueSerializer(genericJackson2JsonRedisSerializer); // 这里的 redis 信息也是可以写入配置文件,用 @Value 读入 // 这里是单机的配置,看看源代码还可以配置集群和哨兵模式 RedisStandaloneConfiguration configuration = new RedisStandaloneConfiguration("localhost", 6379); JedisConnectionFactory factory = new JedisConnectionFactory(configuration); redisTemplate.setConnectionFactory(factory); return redisTemplate; }
注入 secondRedisTemplate 即可
@Autowired RedisTemplatefirstRedisTemplate; @Autowired RedisTemplate secondRedisTemplate; @Override public void run(String... args) throws Exception { BoundValueOperations op = firstRedisTemplate.boundValueOps("PERSON"); People people = new People(); people.setAge(26); people.setName("Deweixu"); op.set(people); BoundValueOperations secondOp = secondRedisTemplate.boundValueOps("PERSON"); People getPeople = (People) secondOp.get(); System.out.println(getPeople.getName() + "," + getPeople.getAge()); }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持创新互联。
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