package com.citi.yf.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target({ElementType.CONSTRUCTOR,ElementType.FIELD,ElementType.LOCAL_VARIABLE,ElementType.METHOD,ElementType.PARAMETER,ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface MyAnnotation {
public String name();
}
package com.citi.yf.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class AnnotationProcessor {
public static void process(Annotation... annotations){
for (Annotation annotation : annotations) {
if (annotation instanceof MyAnnotation) {
System.out.println(((MyAnnotation) annotation).name());
}
}
}
public static void main(String[] args) {
Entity entity = new Entity();
//type
process(Entity.class.getAnnotations());
//constructor
for (Constructor constructor: entity.getClass().getConstructors()) {
process(constructor.getAnnotations());
}
//field
for (Field field : entity.getClass().getDeclaredFields()) {
process(field.getAnnotations());
}
//method
for (Method method : entity.getClass().getMethods()) {
process(method.getAnnotations());
//param
for (Annotation[] annotations : method.getParameterAnnotations()) {
process(annotations);
}
}
}
}
使用切片，切如带有注解的方法，并根据注解执行下一步操作
@Component
@Aspect
public class RedisControlAspectJ {
final static Logger logger = LoggerFactory.getLogger(RedisControlAspectJ.class);
static RedisUtils redisUtils = new RedisUtils();
//切入点
@Pointcut("execution(* com.impl.*.*(..))")
public void doing() {
}
//符合切入点，且方法包含RedisDel注解
@AfterReturning("doing() && @annotation(redisDel)")
public void process(JoinPoint point, RedisDel redisDel) {
for (RedisKeyEnum key : redisDel.redisKey()) {
redisDeleteKey(key);
}
}
void redisDeleteKey(RedisKeyEnum keyEnum) {
String key = keyEnum.getName();
redisUtils.delkeyObject(key);
logger.info("delete redis ->{}", key);
}
}
