java注解使用redis缓存,@Aspect aop @interface

本文主要是介绍java注解使用redis缓存,@Aspect aop @interface，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

/*** redis缓存注解* @author sunlihuo**/
@Target({ElementType.METHOD})   
@Retention(RetentionPolicy.RUNTIME)   
@Documented 
public @interface RedisCache {public enum Option{ADD,UP,SEL,DEL};boolean isArray() default true;Class<?> clazz() default Object.class;String prefix() default "REDIS_";int expireSeconds() default 8000;Option option() default Option.SEL;
}

AOP生效果需要配置


/*** 缓存处理* @author sunlihuo**/
@Aspect
public class CacheAOP {private static final Logger logger = Logger.getLogger(CacheAOP.class);private BaseCache baseCache;public BaseCache getBaseCache() {return baseCache;}public void setBaseCache(BaseCache baseCache) {this.baseCache = baseCache;}@Around(value = "execution(* ccx.common.service.*.*(..)) && @annotation(cache)")public Object around(ProceedingJoinPoint pjd, RedisCache cache) {String redisKey = getRedisKey(pjd, cache);switch (cache.option()) {case SEL:return sel(redisKey, pjd);case ADD:return del(redisKey, pjd);case UP:return del(redisKey, pjd);case DEL:return del(redisKey, pjd);default:break;}return null;}/*** 查询* @param redisKey* @param pjd* @return*/private Object sel(String redisKey, ProceedingJoinPoint pjd) {logger.debug("select redisKey=" + redisKey);Object result = null;try {Object value = baseCache.getObject(redisKey);if (null == value) {logger.debug("redis baseCache.getObject is null key =" + redisKey);result = pjd.proceed();baseCache.setObject(redisKey, result);} else {logger.debug("redis baseCache.getObject is = " + value + " ; key =" + redisKey);result = value;}} catch (Throwable e) {logger.error("CacheAOP pjd.proceed error", e);}return result;}/*** 删除缓存* @param redisKey*/private Object del(String redisKey, ProceedingJoinPoint pjd) {logger.debug("delete redisKey=" + redisKey);baseCache.delete(redisKey);Object result = null;try {result = pjd.proceed();} catch (Throwable e) {logger.error("CacheAOP pjd.proceed error", e);}return result;}/*** 取key* @param pjd* @param cache* @return*/private String getRedisKey(ProceedingJoinPoint pjd, RedisCache cache){String key = "";Object[] args = pjd.getArgs();Object obj = args[0];if (obj instanceof BaseEntity) {long user_id = ((BaseEntity) obj).getUser_id();key = "user_id_" + user_id;} else if (obj instanceof Long) {key = "id_" + (Long) obj;} else if (obj instanceof String) {key = "id_" + (String) obj;}String prefix = cache.prefix();String redisKey = prefix + key;return redisKey;}/*** 前置通知* @return */private void before(RedisCache cache) {}/**后置通知* */private void after() {}/*** 异常通知*/private void throwss() {}/*** 返回通知*/private void result() {}}

附execution 详解 http://blog.csdn.net/sunlihuo/article/details/52701548

AOP生效果需要spring配置

<!--    <aop:aspectj-autoproxy proxy-target-class="true"/> --><aop:aspectj-autoproxy/>  <bean class="com.ccx.framework.cache.CacheAOP" ><property name="baseCache" ref="redisCache" /></bean><bean name="redisCache" class="com.ccx.framework.cache.BaseCache" />

但是最后发现使用注解并没大多的好处

@interface动态注入参数不方便，如注入缓存key

private String getRedisKey(ProceedingJoinPoint pjd, RedisCache cache){String key = "";Object[] args = pjd.getArgs();Object obj = args[0];if (obj instanceof BaseEntity) {long user_id = ((BaseEntity) obj).getUser_id();

使用如上代码就可以取以key

    @RedisCache(prefix="Card_", option=RedisCache.Option.ADD)public boolean add(BaseEntity po) {po.setCreate_date(new Date());po.setModify_date(new Date());return mapper.add(po) > 0 ? true : false;}@RedisCache(prefix="Card_", option=RedisCache.Option.DEL)public boolean del(BaseEntity po) {checkCanHandle(po);String[] ids = { String.valueOf(po.getId()) };return mapper.del(ids) > 0 ? true : false;}@RedisCache(prefix="Card_", option=RedisCache.Option.UP)public boolean update(UserCardInfo po) {checkCanHandle(po);po.setModify_date(new Date());return mapper.update(po) > 0 ? true : false;}@RedisCache(prefix="Card_")public List<UserCardInfo> query(BaseEntity po) {PageTools.setDefStartIndex(po);Integer total = mapper.queryCount(po);po.setTotalRecord(total);po.setPageCount((int) Math.ceil((double) total / po.getPageSize()));return mapper.query(po);}