springboot集成redis的三種方式

• AutoConfig加載
• 自己寫代碼加載
• xml加載

使用這三種方式都需要：

1.添加依賴

2.寫配置信息

spring.redis.database=0
spring.redis.host=localhost
spring.redis.port=6379
# 連接超時時間 單位 ms（毫秒）
spring.redis.timeout=3000

# 連接池中的最大空閑連接，默認值也是8。
spring.redis.pool.max-idle=8
#連接池中的最小空閑連接，默認值也是0。
spring.redis.pool.min-idle=0
# 如果賦值為-1，則表示不限制；如果pool已經分配了maxActive個jedis實例，則此時pool的狀態為exhausted(耗盡)。
spring.redis.pool.max-active=8
# 等待可用連接的最大時間，單位毫秒，默認值為-1，表示永不超時。如果超過等待時間，則直接拋出JedisConnectionException
spring.redis.pool.max-wait=-1

方式一：使用Autoconfiguration自動加載。

因為上面引入了spring-boot-start-data-redis，所以可以使用RedisAutoConfiguration類加載properties文件的配置。

**
 * Standard Redis configuration.
 */
@Configuration
protected static class RedisConfiguration {

    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(
            RedisConnectionFactory redisConnectionFactory)
                    throws UnknownHostException {
        RedisTemplate<Object, Object> template = new RedisTemplate<Object, Object>();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    @Bean
    @ConditionalOnMissingBean(StringRedisTemplate.class)
    public StringRedisTemplate stringRedisTemplate(
            RedisConnectionFactory redisConnectionFactory)
                    throws UnknownHostException {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
}

此種方式會默認加載applicaiton中的redis配置，提供了以下兩種bean

 

RedisTemplate<Object,Object> 可以對Redis中key和value都為object類型的數據進行操作,默認會將對象使用JdkSerializationRedisSerializer進行序列化

StringRedisTemplate可以對Redis中key和value都是String類型的數據進行操作。

方式二：自己寫代碼加載。

@Configuration
public class RedisConfig{

  private Logger logger = LoggerFactory.getLogger(this.getClass());

  @Value("${spring.redis.host}")
  private String host;

  @Value("${spring.redis.port}")
  private int port;

  @Value("${spring.redis.timeout}")
  private int timeout;

  @Value("${spring.redis.password}")
  private String password;

  @Value("${spring.redis.database}")
  private int database;

  @Value("${spring.redis.pool.max-idle}")
  private int maxIdle;

  @Value("${spring.redis.pool.min-idle}") 
  private int minIdle;

  /**
   * redis模板，存儲關鍵字是字符串，值是Jdk序列化
   * @Description:
   * @param factory
   * @return
   */
  @Bean
  public RedisTemplate<String,Object> redisTemplate(RedisConnectionFactory factory) {
      RedisTemplate<String,Object> redisTemplate = new RedisTemplate<>();
      redisTemplate.setConnectionFactory(factory);
      RedisSerializer<String> redisSerializer = new StringRedisSerializer();
      redisTemplate.setKeySerializer(redisSerializer);
      redisTemplate.setHashKeySerializer(redisSerializer);
      //JdkSerializationRedisSerializer序列化方式;
      JdkSerializationRedisSerializer jdkRedisSerializer=new JdkSerializationRedisSerializer();
      redisTemplate.setValueSerializer(jdkRedisSerializer);
      redisTemplate.setHashValueSerializer(jdkRedisSerializer);
      redisTemplate.afterPropertiesSet();
      return redisTemplate; 
  }
}

方式三：使用xml加載。

在程序入口添加：

@ImportResource(locations={"classpath:spring-redis.xml"}) 

在resource文件夾下新建文件spring-redis.xml

 

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cache="http://www.springframework.org/schema/cache"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     http://www.springframework.org/schema/cache 
     http://www.springframework.org/schema/cache/spring-cache.xsd
                        
                        
                        
                        
                        
        http://www.springframework.org/schema/context   
    http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="minIdle" value="${redis.pool.minIdle}" />
        <property name="maxIdle" value="${redis.pool.maxIdle}" />
        <property name="maxWaitMillis" value="${redis.pool.maxWaitMillis}" />
    </bean>

    <bean id="jedisConnectionFactory"
        class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
        <property name="usePool" value="true"></property>
        <property name="hostName" value="${redis.ip}" />
        <property name="port" value="${redis.port}" />
        <property name="password" value="${redis.password}" />
        <property name="timeout" value="${redis.timeout}" />
        <property name="database" value="${redis.default.db}"></property>
        <constructor-arg ref="jedisPoolConfig" />
    </bean>

    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
        <property name="connectionFactory" ref="jedisConnectionFactory" />
        <property name="KeySerializer">
            <bean
                class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
        </property>
        <property name="ValueSerializer">
            <bean
                class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"></bean>
        </property>
        <property name="HashKeySerializer">
            <bean
                class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
        </property>
        <property name="HashValueSerializer">
            <bean
                class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"></bean>
        </property>
    </bean>
</beans>

使用：

用注解注入Template，直接調用就好了。

@Repository
public class RedisService {

    @Autowired
    StringRedisTemplate stringRedisTemplate;

    public void add(String key, User user, Long time) {
        Gson gson = new Gson();
        stringRedisTemplate.opsForValue().set(key, gson.toJson(user), time, TimeUnit.MINUTES);
    }

    public void add(String key, List<User> users, Long time) {
        Gson gson = new Gson();
        String src = gson.toJson(users);
        stringRedisTemplate.opsForValue().set(key, src, time, TimeUnit.MINUTES);
    }

    public User get(String key) {
        String source = stringRedisTemplate.opsForValue().get(key);
        if (!StringUtils.isEmpty(source)) {
            return new Gson().fromJson(source, User.class);
        }
        return null;
    }

    public List<User> getUserList(String key) {
        String source = stringRedisTemplate.opsForValue().get(key);
        if (!StringUtils.isEmpty(source)) {
            return new Gson().fromJson(source, new TypeToken<List<User>>() {
            }.getType());
        }
        return null;
    }

    public void delete(String key) {
        stringRedisTemplate.opsForValue().getOperations().delete(key);
    }
}

如果是測試的話：

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public class RedisTest {

    @Autowired
    RedisService redisService;

    @Before
    public void setUp() {

    }

    @Test
    public void get() {
        User user = new User();
        user.setName("wangjianfeng");
        user.setAge(22);
        redisService.add("userByName:" + user.getName(), user, 10L);
        List<User> list = new ArrayList<>();
        list.add(user);
        redisService.add("list", list, 10L);
        User user1 = redisService.get("userByName:wangjianfeng");
        Assert.notNull(user1, "user is null");
        List<User> list2 = redisService.getUserList("list");
        Assert.notNull(list2, "list is null");
    }
}

SpringBoot使用Redis緩存：

Springboot提供了很多緩存管理器，比如：

• SimpleCacheManager
• EhCacheManager
• CaffeineCacheManager
• GuavaCacheManager
• CompositeCacheManager

SpringData提供了緩存管理器：RedisCacheManager

在SpringBoot中，在程序入口，加上@EnableCaching注解自動化配置合適的管理器。

然后我們使用自己寫代碼配置的方式，修改RedisConfig添加@EnableCaching注解，並繼承CachingCongigurerSupport

@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{
    ...
}