Spring Boot系列(集成EHCache实现缓存机制)

1.pom.xml配置 引入依赖包

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-cache</artifactId>

</dependency>

<dependency>

<groupId>net.sf.ehcache</groupId>

<artifactId>ehcache</artifactId>

</dependency>

2.编写配置类,设置缓存机制

@Configuration

@EnableCaching

public class CacheConfiguration {

@Bean

public EhCacheCacheManager ehCacheCacheManager(EhCacheManagerFactoryBean bean) {

return new EhCacheCacheManager(bean.getObject());

}

@Bean

public EhCacheManagerFactoryBean ehCacheManagerFactoryBean() {

EhCacheManagerFactoryBean cacheManagerFactoryBean = new EhCacheManagerFactoryBean();

cacheManagerFactoryBean.setConfigLocation(new ClassPathResource("config/ehcache.xml"));

cacheManagerFactoryBean.setShared(true);

return cacheManagerFactoryBean;

}

}

3.ehcache.xml配置:

<?xml version="1.0" encoding="UTF-8"?>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"

updateCheck="false">

<diskStore path="java.io.tmpdir/Tmp_EhCache" />

<defaultCache eternal="false" maxElementsInMemory="1000" overflowToDisk="false" diskPersistent="false"

timeToIdleSeconds="0" timeToLiveSeconds="600" memoryStoreEvictionPolicy="LRU" />

<cache name="snailAuthCache" eternal="false" maxElementsInMemory="10000" overflowToDisk="false" diskPersistent="false"

timeToIdleSeconds="0" timeToLiveSeconds="0" memoryStoreEvictionPolicy="LFU" />

</ehcache>

4.测试

a.编写service方法

@Service

public class AuthServiceImpl implements IAuthService {

@Cacheable(value = "snailAuthCache", key = "#userNo")

@Override

public SecurityUserDetails getUserDetlByUserNo(String userNo) {

System.out.println("开始查询.....");

try {

Thread.sleep(5 * 1000l);

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println("查询结束......");

return new SecurityUserDetails();

}

}

这里例子只用到了@Cacheable注解，还有@CachePut，@CacheEvict大伙可以自己加上做个测试，我这里就不列出来了

用法如下图

b.编写control

@RestController

public class HahaCtr {

@Autowired

private IAuthService authService;

@RequestMapping("/haha")

public String haha() {

Long startTime = System.currentTimeMillis();

authService.getUserDetlByUserNo("test");

System.out.println("耗时:" + (System.currentTimeMillis() - startTime));

return "this is a test request";

}

}

c.测试结果

第一次请求到”…/haha”请求时,控制台会输出:

开始查询.....

查询结束......

耗时:5000

再次请求到”…/haha”请求时,控制台会输出:

耗时:0