springboot2.0整合Redis

最新推荐文章于 2021-04-07 11:42:42 发布

原创最新推荐文章于 2021-04-07 11:42:42 发布 · 144 阅读

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文章标签：

#java #springboot #Redis

本文详细介绍了如何在Spring Boot项目中整合Redis，包括pom.xml中添加依赖、application.yml配置、RedisConfigration类的实现，以及如何配置RedisTemplate进行序列化。

1.pom.xml添加依赖

<!-- Spring Boot Redis依赖 -->
<!-- 注意：1.5版本的依赖和2.0的依赖不一样，注意看哦 1.5我记得名字里面应该没有“data”, 2.0必须是“spring-boot-starter-data-redis” 这个才行-->
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-redis</artifactId>
   <!-- 1.5的版本默认采用的连接池技术是jedis  2.0以上版本默认连接池是lettuce, 在这里采用jedis，所以需要排除lettuce的jar -->
   <exclusions>
      <exclusion>
         <groupId>redis.clients</groupId>
         <artifactId>jedis</artifactId>
      </exclusion>
      <exclusion>
         <groupId>io.lettuce</groupId>
         <artifactId>lettuce-core</artifactId>
      </exclusion>
   </exclusions>
</dependency>

<!-- 添加jedis客户端 -->
<dependency>
   <groupId>redis.clients</groupId>
   <artifactId>jedis</artifactId>
</dependency>

<!--spring2.0集成redis所需common-pool2-->
<!-- 必须加上，jedis依赖此  -->
<!-- spring boot 2.0 的操作手册有标注 大家可以去看看 地址是：https://docs.spring.io/spring-boot/docs/2.0.3.RELEASE/reference/htmlsingle/-->
<dependency>
   <groupId>org.apache.commons</groupId>
   <artifactId>commons-pool2</artifactId>
   <version>2.5.0</version>
</dependency>

<!-- 将作为Redis对象序列化器 -->
<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>1.2.47</version>
</dependency>

2.application.yml配置Redis

spring:

redis:
  database: 0
  host: x.x.x.x
  port: 6379
  password: *****
  jedis:
    pool:
      min-idle: 0
      max-idle: 8
      max-wait: -1
      max-active: 8
  timeout: 10000

3.配置RedisConfigRation

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.CacheErrorHandler;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**
 * Redis 配置类
 *
 * @author Leon
 * @version 2018/6/17 17:46
 */
@Configuration
@EnableCaching
public class RedisConfiguration extends CachingConfigurerSupport {

    /**
     * Logger
     */
    private static final Logger lg = LoggerFactory.getLogger(RedisConfiguration.class);


    @Autowired
    private JedisConnectionFactory jedisConnectionFactory;

    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        //  设置自动key的生成规则，配置spring boot的注解，进行方法级别的缓存
        // 使用：进行分割，可以很多显示出层级关系
        return (target, method, params) -> {
            StringBuilder sb = new StringBuilder();
            sb.append(target.getClass().getName());
            sb.append(":");
            sb.append(method.getName());
            for (Object obj : params) {
                sb.append(":" + String.valueOf(obj));
            }
            String rsToUse = String.valueOf(sb);
            lg.info("自动生成Redis Key -> [{}]", rsToUse);
            return rsToUse;
        };
    }

    @Bean
    @Override
    public CacheManager cacheManager() {
        // 初始化缓存管理器，在这里我们可以缓存的整体过期时间什么的，我这里默认没有配置
        lg.info("初始化 -> [{}]", "CacheManager RedisCacheManager Start");
        RedisCacheManager.RedisCacheManagerBuilder builder = RedisCacheManager
                .RedisCacheManagerBuilder
                .fromConnectionFactory(jedisConnectionFactory);
        return builder.build();
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate(JedisConnectionFactory jedisConnectionFactory) {
        //设置序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        // 配置redisTemplate
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
        redisTemplate.setConnectionFactory(jedisConnectionFactory);
        RedisSerializer stringSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringSerializer); // key序列化
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer); // value序列化
        redisTemplate.setHashKeySerializer(stringSerializer); // Hash key序列化
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer); // Hash value序列化
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

    @Override
    @Bean
    public CacheErrorHandler errorHandler() {
        // 异常处理，当Redis发生异常时，打印日志，但是程序正常走
        lg.info("初始化 -> [{}]", "Redis CacheErrorHandler");
        CacheErrorHandler cacheErrorHandler = new CacheErrorHandler() {
            @Override
            public void handleCacheGetError(RuntimeException e, Cache cache, Object key) {
                lg.error("Redis occur handleCacheGetError：key -> [{}]", key, e);
            }

            @Override
            public void handleCachePutError(RuntimeException e, Cache cache, Object key, Object value) {
                lg.error("Redis occur handleCachePutError：key -> [{}]；value -> [{}]", key, value, e);
            }

            @Override
            public void handleCacheEvictError(RuntimeException e, Cache cache, Object key) {
                lg.error("Redis occur handleCacheEvictError：key -> [{}]", key, e);
            }

            @Override
            public void handleCacheClearError(RuntimeException e, Cache cache) {
                lg.error("Redis occur handleCacheClearError：", e);
            }
        };
        return cacheErrorHandler;
    }

    @ConfigurationProperties
    class DataJedisProperties {
        @Value("${spring.redis.host}")
        private String host;
        @Value("${spring.redis.password}")
        private String password;
        @Value("${spring.redis.port}")
        private int port;
        @Value("${spring.redis.timeout}")
        private int timeout;
        @Value("${spring.redis.jedis.pool.max-idle}")
        private int maxIdle;
        @Value("${spring.redis.jedis.pool.max-wait}")
        private long maxWaitMillis;

        @Bean
        JedisConnectionFactory jedisConnectionFactory() {
            lg.info("Create JedisConnectionFactory successful");
            JedisConnectionFactory factory = new JedisConnectionFactory();
            factory.setHostName(host);
            factory.setPort(port);
            factory.setTimeout(timeout);
            factory.setPassword(password);
            return factory;
        }

        @Bean
        public JedisPool redisPoolFactory() {
            lg.info("JedisPool init successful，host -> [{}]；port -> [{}]", host, port);
            JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
            jedisPoolConfig.setMaxIdle(maxIdle);
            jedisPoolConfig.setMaxWaitMillis(maxWaitMillis);

            JedisPool jedisPool = new JedisPool(jedisPoolConfig, host, port, timeout, password);
            return jedisPool;
        }
    }
}

这样就大功告成了，接下来我们测试一下