spring切面切點@Aspect的使用

spring aspect是指在指定的方法前後或者環繞式的加上另外的處理，當指定的方法被使用的時候aspect配置的方法會被調用和執行。就像切面一樣，從一個切入點開始往這個切面嵌入別的處理流程

比如，在登陸的時候配置了登陸的切面，切面的功能是檢查用戶的ip地址，如果ip地址不符合我們要求的ip地址，則做相應的處理，處理完成後繼續登陸方法的執行。

下面是一個簡單的aspect的代碼：

import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import com.google.gson.Gson;
import com.heiman.smarthome.exception.CustomException;
import com.heiman.smarthome.po.custom.Config;
import com.heiman.smarthome.po.custom.EnterpriseMemberCustom;
import com.heiman.smarthome.po.enumpo.LogLevel;
import com.heiman.smarthome.po.enumpo.OperationType;
import com.heiman.smarthome.po.system.SecurityAudit;
import com.heiman.smarthome.service.SecurityAuditService;

@Aspect
@Component
public class SecurityAuditAspectj {

	@Autowired
	private HttpSession httpSession;

	@Autowired
	private HttpServletRequest httpServletRequest;

	@Autowired
	private Config config;

	// 切點<增刪改查和登陸
	@Pointcut("execution(* com.heiman.xx.service..*.*update*(..)) ||  "
			+ "execution(* com.heiman.xx.service..*.*delete*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*insert*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*add*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*save*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*modify*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*edit*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*remove*(..)) || "
			+ "execution(* com.heiman.xx.service..*.*repair*(..)) || "
			+ "execution(* com.heiman.xx.controller..*.*login*(..))")
	public void pointcut() {
	}

	/**
	 * 切點之後
	 * 
	 * @param jp
	 */
	@After("pointcut()")
	public void after(JoinPoint jp) {

		SecurityAudit audit = new SecurityAudit();
		String detail = null; // 詳細信息

		String methodName = jp.getSignature().getName();// 方法名

		String className = jp.getTarget().getClass().getSimpleName(); // 獲取類名

		EnterpriseMemberCustom custom = (EnterpriseMemberCustom) httpSession.getAttribute("memberMsg");
		if (custom == null)
			return;
		String userName = custom.getMembername();// 登陸用戶的名字
		Integer enterpriseMemberId = custom.getId();

		if (methodName.equals("login")) {
			detail = userName + "登陸了";
		} else {
			String s = className.replaceAll("ServiceImpl", "").replaceAll("Service", "");
			detail = userName + "對 " + s + " 執行了操作 " + methodName + " :" + together(jp);
		}

		if (methodName.contains("update") || methodName.contains("modify") || methodName.contains("edit")
				|| methodName.contains("repair")) {
			// 修改
			audit.setOperationtype(OperationType.UPDATE.getIndex());
		} else if (methodName.contains("delete") || methodName.contains("remove")) {
			// 刪除
			audit.setOperationtype(OperationType.DELETE.getIndex());
		} else if (methodName.contains("save") || methodName.contains("insert") || methodName.contains("add")) {
			// 增加
			audit.setOperationtype(OperationType.ADD.getIndex());
		} else if (methodName.equals("login")) {
			// 登陸
			audit.setOperationtype(OperationType.LOGIN.getIndex());
		}

		audit.setOperatorip(httpServletRequest.getLocalAddr());// 操作者ip
		audit.setOperationtime(new Date());// 時間
		audit.setLoglevel(LogLevel.INFO.getIndex());// 日誌級別
		audit.setEnterprisememberid(enterpriseMemberId); // 操作者id
		audit.setLogsummary(detail);// 詳情


	}

}