SpringBoot自定义注解之实现AOP切面日志详解

<!-- AOP -->
    <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
 
 
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface SysLog {
 
    
    String obj() default "";
 
    
    String text() default "";
}

import java.lang.reflect.Method;
 
import com.zxk.demo.annotation.SysLog;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
 
 
@SuppressWarnings("all")
@Aspect
@Component
public class SysLogAspect {
 
    // 切入点
    @Pointcut(value = "@annotation(com.zxk.demo.annotation.SysLog)")
    private void pointcut() {
    }
 
    
    @Before(value = "pointcut() && @annotation(sysLog)")
    public void before(SysLog sysLog){
        System.out.println("++++执行了before方法++++");
    }
 
 
    
    @Around(value = "pointcut() && @annotation(sysLog)")
    public Object around(ProceedingJoinPoint point, SysLog sysLog) {
        System.out.println("++++执行了around方法++++");
        String obj = sysLog.obj();
        String text = sysLog.text();
        // 拦截的类名
        Class clazz = point.getTarget().getClass();
        // 拦截的方法
        Signature sig = point.getSignature();
        MethodSignature msig = null;
        if (!(sig instanceof MethodSignature)) {
            throw new IllegalArgumentException("该注解只能用于方法");
        }
        msig = (MethodSignature) sig;
        Object target = point.getTarget();
        Method currentMethod;
        try {
            currentMethod = target.getClass().getMethod(msig.getName(), msig.getParameterTypes());
            System.out.println("执行了类:" + clazz.getSimpleName());
            System.out.println("方法:" + currentMethod.getName());
            System.out.println("自定义注解:" + obj+"==="+text);
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            return point.proceed(); // 执行程序
        } catch (Throwable throwable) {
            throwable.printStackTrace();
            return throwable.getMessage();
        }
    }
 
    
    @AfterReturning(value = "pointcut() && @annotation(sysLog)", returning = "result")
    public Object afterReturning(JoinPoint joinPoint, SysLog sysLog, Object result) {
        // httpservletRequest request = ((ServletRequestAttributes)
        // RequestContextHolder.getRequestAttributes()).getRequest();
        // HttpSession session = request.getSession();
        
        System.out.println("++++执行了afterReturning方法++++");
        System.out.println("自定义注解:" + sysLog.obj()+"=="+sysLog.text());
        System.out.println("执行结果：" + result);
        return result;
    }
 
    
    @AfterThrowing(value = "pointcut() && @annotation(sysLog)", throwing = "ex")
    public void afterThrowing(JoinPoint joinPoint, SysLog sysLog, Exception ex) {
        System.out.println("++++执行了afterThrowing方法++++");
        System.out.println("请求：" + sysLog.text() + " 出现异常");
    }
}

@SysLog(obj = "操作对象", text = "操作内容")
@GetMapping("/index")
    public String hello() {
//        int num = 5/0;
//        System.out.println("执行结果：" + num);
        return "hello Word";
    }