SSM中使用spring注解支持使用redis缓存

SSM中使用spring注解支持使用redis缓存

• 在maven工程的pom.xml文件中引入相关依赖。

    
      org.springframework.data
      spring-data-redis
      2.1.6.RELEASE
    
    
      redis.clients
      jedis
      2.9.1
    

• 编写配置类。

package com.HW_CloudComputer.webconfig.cachingconfig;
import com.HW_CloudComputer.model.TimeDelays;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import redis.clients.jedis.JedisPoolConfig;

import java.time.Duration;

@Configuration
@EnableCaching     //启用缓存
public class CachingConfig {
    //redis缓存管理器bean
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofHours(1)); // 设置缓存有效期1小时
        return RedisCacheManager
                .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
                .cacheDefaults(redisCacheConfiguration).build();
    }

    //连接池配置信息
    @Bean
    public JedisPoolConfig jedisPoolConfig() {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        //最大连接数
        jedisPoolConfig.setMaxTotal(100);
        //最小空闲连接数
        jedisPoolConfig.setMinIdle(20);
        //当池内没有可用连接时，最大等待时间
        jedisPoolConfig.setMaxWaitMillis(10000);
        //其他属性可以自行添加
        return jedisPoolConfig;
    }

    // jedis连接工厂
    @Bean
    public RedisConnectionFactory redisConnectionFactory(JedisPoolConfig jedisPoolConfig) {
        RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
        //设置redis服务器的host或者ip地址
        redisStandaloneConfiguration.setHostName("127.0.0.1");
        redisStandaloneConfiguration.setPort(6379);
        //获得默认的连接池构造
        //这里需要注意的是，edisConnectionFactoryJ对于Standalone模式的没有（RedisStandaloneConfiguration，JedisPoolConfig）的构造函数，对此
        //我们用JedisClientConfiguration接口的builder方法实例化一个构造器，还得类型转换
        JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcf = (JedisClientConfiguration.JedisPoolingClientConfigurationBuilder) JedisClientConfiguration.builder();
        //修改我们的连接池配置
        jpcf.poolConfig(jedisPoolConfig);
        //通过构造器来构造jedis客户端配置
        JedisClientConfiguration jedisClientConfiguration = jpcf.build();
        return new JedisConnectionFactory(redisStandaloneConfiguration, jedisClientConfiguration);
    }

    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisCF) {
        RedisTemplate redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisCF);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

• 在需要进行缓存的方法上使用注解进行配置。

   @Cacheable(value = "quarterCache",key = "#root.args")
    TimeDelays findManyQuarter(String start_time, String end_time);
    @Cacheable(value = "hourCache",key = "#root.args")
    TimeDelays findManyHour(String start_time,String end_time);
    @Cacheable(value = "dayCache",key = "#root.args")
    TimeDelays findManyDay(String start_time,String end_time);