一、Spring集成第三方框架

1.1 XML

我看下如果使用Spring的XML方式集成redis的话，我们会这么集成：

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   <!-- 配置JedisPoolConfig-->    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">        <property name="maxIdle" value="50"/>        <property name="maxTotal" value="100"/>        <property name="maxWaitMillis" value="20000"/>    </bean>    <!--配置JedisConnectionFactory-->    <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">        <property name="hostName" value="localhost"/>        <property name="port" value="6379"/>        <property name="poolConfig" ref="jedisPoolConfig"/>    </bean>        <!--使用字符串进行序列化-->    <bean id="stringReadisSerializer"  class="org.springframework.data.redis.serializer.StringRedisSerializer" />    <!--使用JDK的序列化器进行转化-->    <bean id="jdkSerializationRedisSerializer" class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>        <!--配置Spring RedisTemplate-->    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">        <property name="connectionFactory" ref="connectionFactory"/>        <property name="keySerializer" ref="stringReadisSerializer"/>        <property name="valueSerializer" ref="stringReadisSerializer"/>    </bean>

这个配置想必大家都很熟了吧。

1.2 Java注解版本

       上面是通过是通过配置文件XML的方式，我们使用java的注解注入呐？

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  @Bean    public JedisPoolConfig jedisPoolConfig() {    JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();    jedisPoolConfig.setMaxTotal(100);    jedisPoolConfig.setMaxIdle(50);    return jedisPoolConfig;  }    @Bean  public JedisConnectionFactory jedisConnectionFactory() {    JedisConnectionFactory jedisConnectionFactory = new JedisConnectionFactory();    jedisConnectionFactory.setHostName("localhost");    jedisConnectionFactory.setPort("6379");    jedisConnectionFactory.setPoolConfig(jedisPoolConfig());  }         @Bean  public RedisTemplate redisTemplate() {    RedisTemplate redisTemplate = new RedisTemplate();    redisTemplate.setConnectionFactory(jedisConnectionFactory)());    redisTemplate.setKeySerializer(new StringRedisSerializer());    redisTemplate.setValueSerializer(new StringRedisSerializer());    return redisTemplate;  }

 

       @Bean注解的方式，就是对应的配置文件的<bean>了，这个应该很好理解。

二、Spring理解Spring Boot

       在Spring Boot中，我们好像不需要进行配置了。其实并非不用配置，而是spring boot帮我们进行了自动配置呢，对应的就是RedisAutoConfiguration：

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@Configuration(proxyBeanMethods = false)@ConditionalOnClass(RedisOperations.class)@EnableConfigurationProperties(RedisProperties.class)@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })public class RedisAutoConfiguration {
  @Bean  @ConditionalOnMissingBean(name = "redisTemplate")  public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)      throws UnknownHostException {    RedisTemplate<Object, Object> template = new RedisTemplate<>();    template.setConnectionFactory(redisConnectionFactory);    return template;  }
  @Bean  @ConditionalOnMissingBean  public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)      throws UnknownHostException {    StringRedisTemplate template = new StringRedisTemplate();    template.setConnectionFactory(redisConnectionFactory);    return template;  }
}

       Spring Boot在启动的时候，会加载此类，初始化我们的redisTemplate。

这就是Spring Boot的一点核心特性：就是自动装配。