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基于aop的依赖jar包,可以实现切面过滤拦截。
依赖包:
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.0.RELEASE</version>
</dependency>
使用:
1.@Aspect和@Configuration添加到定义的Aspect类上,指明切面类。
2.定义切点:@Pointcut(“execution(* com.controller.Test2Controller.*(..))”)
将@Pointcut定义到切点方法上
3.切面过滤注解:
@Before(“pointcut()”)
@Around(“pointcut()”)
@AfterReturning(value = “pointcut()”,returning = “returnValue”)
@After(“pointcut()”)
@AfterThrowing
这几个注解的过滤顺序为:
@Around-joinPoint.proceed(args)前
@Before
@Around-joinPoint.proceed(args)后
@After
@AfterReturning/@AfterThrowing
4.举个栗子:
import com.alibaba.fastjson.JSON;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;
import java.util.Arrays;
@Aspect
@Configuration
public class TestAspect {
Logger logger = LoggerFactory.getLogger(getClass());
// 定义切点Pointcut
@Pointcut("execution(* .test.Test2Controller.*(..))")
public void pointcut() {
logger.info("pointcut---------------execute");
}
@Before("pointcut()")
public void before(){
logger.info("@Before------------execute");
}
@Around("pointcut()")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable{
Signature signature = joinPoint.getSignature();
logger.info("@Around-joinPoint.proceed(args)前");
logger.info("@Around-执行目标方法前参数:"+Arrays.toString(joinPoint.getArgs()));
Object[] args = joinPoint.getArgs();
if(args != null &&args.length>0){
args[0]="update";
}
Object proceed = joinPoint.proceed(args);
logger.info("@Around-joinPoint.proceed(args)后");
logger.info("@Around-被织入的目标对象:" + joinPoint.getTarget());
logger.info("@Around-返回值:"+JSON.toJSONString(proceed));
return JSON.toJSONString(proceed);
}
@AfterReturning(value = "pointcut()",returning = "returnValue")
public void afterReturning(JoinPoint point, Object returnValue) {
logger.info("@AfterReturning-方法:"+point.getSignature().getDeclaringTypeName()+point.getSignature().getName());
logger.info("@AfterReturning-参数:"+Arrays.toString(point.getArgs()));
logger.info("@AfterReturning-返回值:" + returnValue);
logger.info("@AfterReturning-被织入的目标对象:" + point.getTarget());
}
@After("pointcut()")
public void after(JoinPoint point){
logger.info("@After-方法:"+point.getSignature().getDeclaringTypeName()+point.getSignature().getName());
logger.info("@After-参数:"+Arrays.toString(point.getArgs()));
logger.info("@After-被织入的目标对象:" + point.getTarget());
}
@AfterThrowing("pointcut()")
public void afterThrowing(JoinPoint point){
logger.info("@AfterThrowing-----",point.getTarget());
}
}
控制台:
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.around(TestAspect.java:36)
-@Around-joinPoint.proceed(args)前
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.around(TestAspect.java:37)
-@Around-执行目标方法前参数:[null]
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.before(TestAspect.java:29)
-@Before------------execute
执行test-----update
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.around(TestAspect.java:43)
-@Around-joinPoint.proceed(args)后
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.around(TestAspect.java:44)
-@Around-被织入的目标对象:net.buybal.order.controller.test.Test2Controller@155814e5
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.around(TestAspect.java:45)
-@Around-返回值:"update"
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.after(TestAspect.java:59)
-@After-方法:net.buybal.order.controller.test.Test2Controllertest
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.after(TestAspect.java:60)
-@After-参数:[update]
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.after(TestAspect.java:61)
-@After-被织入的目标对象:net.buybal.order.controller.test.Test2Controller@155814e5
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.afterReturning(TestAspect.java:51)
-@AfterReturning-方法:net.buybal.order.controller.test.Test2Controllertest
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.afterReturning(TestAspect.java:52)
-@AfterReturning-参数:[update]
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.afterReturning(TestAspect.java:53)
-@AfterReturning-返回值:"update"
2019-11-26 17:22:56 [http-bio-9998-exec-1] INFO -Caller+0 at *.TestAspect.afterReturning(TestAspect.java:54)
-@AfterReturning-被织入的目标对象:net.buybal.order.controller.test.Test2Controller@155814e5
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.around(TestAspect.java:36)
-@Around-joinPoint.proceed(args)前
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.around(TestAspect.java:37)
-@Around-执行目标方法前参数:[null]
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.before(TestAspect.java:29)
-@Before------------execute
执行test-----update
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.after(TestAspect.java:59)
-@After-方法:net.buybal.order.controller.test.Test2Controllertest
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.after(TestAspect.java:60)
-@After-参数:[update]
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.after(TestAspect.java:61)
-@After-被织入的目标对象:net.buybal.order.controller.test.Test2Controller@2965bb5f
2019-11-26 17:19:27 [http-bio-9998-exec-1] INFO -Caller+0 at *.aspect.TestAspect.afterThrowing(TestAspect.java:65)
-@AfterThrowing-----
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