（十一）使用AOP，@aspect统一处理Web请求日志

src/main/java/com/training/core/aspect/WebLogAspect.java

@@ -0,0 +1,63 @@
+package com.training.core.aspect;
+
+import org.apache.log4j.Logger;
+import org.aspectj.lang.JoinPoint;
+import org.aspectj.lang.annotation.AfterReturning;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Before;
+import org.aspectj.lang.annotation.Pointcut;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+import org.springframework.web.context.request.RequestContextHolder;
+import org.springframework.web.context.request.ServletRequestAttributes;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.Arrays;
+
+/**
+ * Web层日志切面
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/5/17 上午10:42.
+ * @blog http://blog.didispace.com
+ */
+@Aspect
+@Order(5)
+@Component
+public class WebLogAspect {
+
+    private Logger logger = Logger.getLogger(getClass());
+
+    ThreadLocal<Long> startTime = new ThreadLocal<>();
+
+    @Pointcut("execution(public * com.didispace.web..*.*(..))")
+    public void webLog(){}
+
+    @Before("webLog()")
+    public void doBefore(JoinPoint joinPoint) throws Throwable {
+        startTime.set(System.currentTimeMillis());
+
+        // 接收到请求，记录请求内容
+        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
+        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()));
+
+    }
+
+    @AfterReturning(returning = "ret", pointcut = "webLog()")
+    public void doAfterReturning(Object ret) throws Throwable {
+        // 处理完请求，返回内容
+        logger.info("RESPONSE : " + ret);
+        logger.info("SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));
+    }
+
+
+}
+