Spring Cache实战

1. 环境
   jdk1.8
   Spring 4.3.9.RELEASE
2. 引包
   spring-context
   lombok 1.16.12
3. cache配置

<?xml version="1.0" encoding="UTF-8"?>
<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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
  <bean class="com.dong.service.MerchantService"/>
  <cache:annotation-driven/>
  <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
    <property name="caches">
      <set>
        <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean">
          <property name="name" value="merchant"/>
        </bean>
      </set>
    </property>
  </bean>
</beans>

4. 基本代码

package com.dong.service;

import com.dong.entity.Merchant;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import java.util.UUID;

/**
 * 商户服务
 *
 * @author dongzhihua
 * @date 2020/11/9 11:01
 */
@Service
@Slf4j
public class MerchantService {
    @Cacheable(value = "merchant", key = "'merchant-'+#p0")
    public Merchant load(String code) {
        log.info("查询数据库：{}", code);
        Merchant merchant = new Merchant();
        merchant.setCode(code);
        merchant.setName(UUID.randomUUID().toString());
        return merchant;
    }

    @Cacheable(value = "merchant", key = "'merchant-'+#merchant.code")
    public Merchant load(Merchant merchant) {
        log.info("查询数据库：{}", merchant);
        merchant.setName(UUID.randomUUID().toString());
        return merchant;
    }

    @CacheEvict(value = "merchant", key = "'merchant-'+#merchant.code")
    public void update(Merchant merchant) {
        log.info("更新商户：{}", merchant);
    }
}

package com.dong.entity;

import lombok.Data;

import java.util.Date;

/**
 * 商户实体
 *
 * @author dongzhihua
 * @date 2020/11/9 11:01
 */
@Data
public class Merchant {
    private String code;
    private String name;
}

5. 测试代码

package com.dong.service;

import com.dong.entity.Merchant;
import lombok.extern.slf4j.Slf4j;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.annotation.Resource;

@ContextConfiguration("classpath:spring-cache-test.xml")
@RunWith(SpringJUnit4ClassRunner.class)
@Slf4j
public class MerchantServiceTest {

    @Resource
    MerchantService merchantService;

    @Test
    public void load() {
        for (int i = 0; i < 5; i++) {
            Merchant mer = merchantService.load("110");
            log.info("查到结果{}：{}", i, mer);
            if (i % 4 == 3) {
                merchantService.update(mer);
            }
        }
    }

    @Test
    public void testLoad() {
        Merchant mer = new Merchant();
        mer.setCode("110");
        for (int i = 0; i < 5; i++) {
            Merchant result = merchantService.load(mer);
            log.info("查到结果{}：{}", i, result);
            if (i % 5 == 2) {
                merchantService.update(mer);
            }
        }
    }
}

6. 结果

11:27:58.800 [main] INFO com.dong.service.MerchantService - 查询数据库：Merchant(code=110, name=null)
11:27:59.133 [main] INFO com.dong.service.MerchantServiceTest - 查到结果0：Merchant(code=110, name=b19c11ed-d63c-463b-83df-1d25d254acf1)
11:27:59.134 [main] INFO com.dong.service.MerchantServiceTest - 查到结果1：Merchant(code=110, name=b19c11ed-d63c-463b-83df-1d25d254acf1)
11:27:59.134 [main] INFO com.dong.service.MerchantServiceTest - 查到结果2：Merchant(code=110, name=b19c11ed-d63c-463b-83df-1d25d254acf1)
11:27:59.134 [main] INFO com.dong.service.MerchantService - 更新商户：Merchant(code=110, name=b19c11ed-d63c-463b-83df-1d25d254acf1)
11:27:59.135 [main] INFO com.dong.service.MerchantService - 查询数据库：Merchant(code=110, name=b19c11ed-d63c-463b-83df-1d25d254acf1)
11:27:59.135 [main] INFO com.dong.service.MerchantServiceTest - 查到结果3：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.135 [main] INFO com.dong.service.MerchantServiceTest - 查到结果4：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.139 [main] INFO com.dong.service.MerchantServiceTest - 查到结果0：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.139 [main] INFO com.dong.service.MerchantServiceTest - 查到结果1：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.139 [main] INFO com.dong.service.MerchantServiceTest - 查到结果2：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.139 [main] INFO com.dong.service.MerchantServiceTest - 查到结果3：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.139 [main] INFO com.dong.service.MerchantService - 更新商户：Merchant(code=110, name=6d6733ac-cdfb-4ecf-83fb-5f575457750b)
11:27:59.139 [main] INFO com.dong.service.MerchantService - 查询数据库：110
11:27:59.139 [main] INFO com.dong.service.MerchantServiceTest - 查到结果4：Merchant(code=110, name=7948ec44-4470-4052-b450-342b559fcb6b)

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本文地址：https://blog.csdn.net/o544033135/article/details/109573437