SpringBoot系列——aop 面向切面 - 好文

前言

　　项目中我们经常会用到aop切面，比如日志记录；这里简单记录一下springboot是如何使用aop

　　spring对aop的配置，来自springboot参考手册，Common application properties：
https://docs.spring.io/spring-boot/docs/2.1.0.RELEASE/reference/htmlsingle/#common-application-properties

<https://docs.spring.io/spring-boot/docs/2.1.0.RELEASE/reference/htmlsingle/#common-application-properties>
# AOP spring.aop.auto=true # Add @EnableAspectJAutoProxy.
spring.aop.proxy-target-class=true# Whether subclass-based (CGLIB) proxies are
to be created (true), as opposed to standard Java interface-based proxies
(false).

　　maven引包
 <dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId> </dependency>
 <dependency> <groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId> </dependency> <dependency>
<groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId>
</dependency>

　　Aspect 切面
/** * Aspect 切面 * 日志切面 */ @Aspect @Component public class LogAspect { /** *
slf4j日志*/ private final static Logger logger =
LoggerFactory.getLogger(LogAspect.class); /** * Pointcut 切入点 *
匹配cn.controller包下面的所有方法*/ @Pointcut("execution(public * cn.controller.*.*(..))")
public void webLog(){} /** * 环绕通知 */ @Around(value = "webLog()") public Object
arround(ProceedingJoinPoint pjp) {try { logger.info("1、Around：方法环绕开始.....");
Object o= pjp.proceed(); logger.info("3、Around：方法环绕结束，结果是 :" + o); return o; }
catch (Throwable e) { logger.error(pjp.getSignature() + " 出现异常： ", e); return
Result.of(null, false, "出现异常：" + e.getMessage()); } } /** * 方法执行前 */
@Before(value= "webLog()") public void before(JoinPoint joinPoint){ logger.info(
"2、Before：方法执行开始..."); // 接收到请求，记录请求内容 ServletRequestAttributes attributes =
(ServletRequestAttributes) RequestContextHolder.getRequestAttributes();assert
attributes !=null; HttpServletRequest request = attributes.getRequest(); //
记录下请求内容 logger.info("URL : " + request.getRequestURL().toString()); logger.info(
"HTTP_METHOD : " + request.getMethod()); logger.info("IP : " +
request.getRemoteAddr()); logger.info("CLASS_METHOD : " +
joinPoint.getSignature().getDeclaringTypeName() + "." +
joinPoint.getSignature().getName()); logger.info("ARGS : " +
Arrays.toString(joinPoint.getArgs())); }/** * 方法执行结束，不管是抛出异常或者正常退出都会执行 */
@After(value= "webLog()") public void after(JoinPoint joinPoint){ logger.info(
"4、After：方法最后执行....."); } /** * 方法执行结束，增强处理 */ @AfterReturning(returning =
"ret", pointcut = "webLog()") public void doAfterReturning(Object ret){ //
处理完请求，返回内容 logger.info("5、AfterReturning：方法的返回值 : " + ret); } /** * 后置异常通知 */
@AfterThrowing(value= "webLog()") public void throwss(JoinPoint joinPoint){
logger.error("AfterThrowing：方法异常时执行....."); } }

　　效果

　　访问获取所有用户接口

热门工具换一换