提示:
springboot提供了一套链接redis的api,也就是个jar包,用到的连接类叫做LettuceConnectionConfiguration,所以我们引入pom时是这样的
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
如果你想使用其他链接redis的api,最常用的基本上就是Jedis的JedisConnectionFactory那么你就需要引入jedis,然后exclusions掉springboot提供做Lettuce:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
<exclusions>
<exclusion>
<groupId>io.lettuce</groupId>
<artifactId>lettuce-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</dependency>
1.配置实现SpringBoot集成Redis(只需两步)
1.最简单的配置就是在application.propertity中配置
#cache指定缓存类型
spring.cache.type=REDIS #data-redis
spring.redis.database=15
spring.redis.password=
spring.redis.host=192.168.**.**
spring.redis.port=6379
spring.redis.timeout=2000
spring.redis.jedis.pool.max-active=8
spring.redis.jedis.pool.max-idle=8
spring.redis.jedis.pool.max-wait=-1
spring.redis.jedis.pool.min-idle=0
2.启动类开启缓存
@SpringBootApplication
@EnableCaching
public class EvaluationApplication {}
好了,配置好了!!
2.你有没有想过为啥SpringBoot集成Redis的配置那么简单?
原因:
1.SB之所以好用就是因为SB替我们做了很多以前我们需要手动在Spring中做的工作。
2.SB中默认是带了一个jar包:org.springframework.boot.autoconfigure这个包包含了大部分SpringBoot默认实现的功能,感兴趣的童鞋可以自己看下
3.我们可以在这个package org.springframework.boot.autoconfigure.data.redis;下看到SB为我们默认实现的集成Redis的代码:
4.我们可以看到有个JedisConnectionConfiguration类
@Configuration //启动加载
@ConditionalOnClass({ GenericObjectPool.class, JedisConnection.class, Jedis.class })
class JedisConnectionConfiguration extends RedisConnectionConfiguration { private final RedisProperties properties; private final List<JedisClientConfigurationBuilderCustomizer> builderCustomizers; JedisConnectionConfiguration(RedisProperties properties,
ObjectProvider<RedisSentinelConfiguration> sentinelConfiguration,
ObjectProvider<RedisClusterConfiguration> clusterConfiguration,
ObjectProvider<List<JedisClientConfigurationBuilderCustomizer>> builderCustomizers) {
super(properties, sentinelConfiguration, clusterConfiguration);
this.properties = properties;
this.builderCustomizers = builderCustomizers
.getIfAvailable(Collections::emptyList);
} @Bean //启动加载JedisConnectionFactory放入spring的容器中
@ConditionalOnMissingBean(RedisConnectionFactory.class)
public JedisConnectionFactory redisConnectionFactory() throws UnknownHostException {
return createJedisConnectionFactory();
}
//我们可以看到SB为我们默认提供了三种加载方式
private JedisConnectionFactory createJedisConnectionFactory() {
JedisClientConfiguration clientConfiguration = getJedisClientConfiguration();
if (getSentinelConfig() != null) {//如果配置文件中配置了多个节点,则以多节点方式加载 此方式上面配置部分无效,详情看源码
return new JedisConnectionFactory(getSentinelConfig(), clientConfiguration);
}
if (getClusterConfiguration() != null) {//如果配置了集群则以集群方式加载 此方式上面配置部分无效,详情看源码
return new JedisConnectionFactory(getClusterConfiguration(),
clientConfiguration);
}
return new JedisConnectionFactory(getStandaloneConfig(), clientConfiguration);//以单节点的方式加载redis配置,上面配置生效
}
5.附上最后一种方式加载配置的源码
protected final RedisStandaloneConfiguration getStandaloneConfig() {
RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
if (StringUtils.hasText(this.properties.getUrl())) {
ConnectionInfo connectionInfo = parseUrl(this.properties.getUrl());
config.setHostName(connectionInfo.getHostName());
config.setPort(connectionInfo.getPort());
config.setPassword(RedisPassword.of(connectionInfo.getPassword()));
}
else {
config.setHostName(this.properties.getHost()); //这个propertity加载的就是上面我们贴出来的配置,源码可以看到上面图片中有个RedisPropertity类,配置文件中的配置就是根据这个类配置的
config.setPort(this.properties.getPort());
config.setPassword(RedisPassword.of(this.properties.getPassword()));
}
config.setDatabase(this.properties.getDatabase());
return config;
}
3.那么问题来了,为什么我一直择库失败呢?
spring.redis.database=15 //为什么的我这个配置一直不生效呢? 我想你心里应该有答案了
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