1配置类

@Configuration

@EnableCaching
public class EhcacheConfig {
    @Bean(name = "appEhCacheCacheManager")
    public EhCacheCacheManager ehCacheCacheManager(){
        EhCacheManagerFactoryBean bean=ehCacheManagerFactoryBean();
        return new EhCacheCacheManager (bean.getObject ());
    }
    @Bean
    public EhCacheManagerFactoryBean ehCacheManagerFactoryBean(){
        EhCacheManagerFactoryBean cacheManagerFactoryBean = new EhCacheManagerFactoryBean ();
        cacheManagerFactoryBean.setConfigLocation (new ClassPathResource("ehcache.xml"));
        cacheManagerFactoryBean.setShared (true);
        return cacheManagerFactoryBean;
    }
}

2调用service层

@Controller
@RequestMapping("/home/main")
public class HomeController {
    @Autowired
    HelloService helloService;
    @RequestMapping("/show")
    @ResponseBody
    public String showHello(){
        System.out.println(helloService.cacheService("1"));
        System.out.println(helloService.cacheService("2"));
        System.out.println(helloService.cacheService("1"));
        System.out.println(helloService.cacheService("2"));
        return rtn;

    }
}
3service层方法加上@cacheable注解

@Service
public class HelloService {
    @Cacheable(value = "http://www.mamicode.com/helloworld", key="#id")
    public  String cacheService(String id){
        System.out.println("excuteing blllaaaaaa");
        return id+"_value";
    }
}
4运行结果

excuteing blllaaaaaa
1_value
excuteing blllaaaaaa
2_value
1_value
2_value

ehcache 缓存使用