AOP日志记录

一.采用功能最强的环绕通知

   

@Component
@Aspect
public class LogAop {
    @Autowired
    private HttpServletRequest request;

    @Autowired
    private ISysLogService sysLogService;

    /**
     * 记录日志环绕通知
     * @param pjp
     * @return
     * @throws Throwable
     */
    @Around("execution(* cn.itcast.controller.*Controller.*(..))")
    public Object around(ProceedingJoinPoint pjp) throws Throwable {
        SysLog sysLog = new SysLog();
        long startTime = System.currentTimeMillis();
        String uri = request.getRequestURI();//获取路径uri
        String ip = request.getRemoteAddr();//获取ip

        String className = pjp.getTarget().getClass().getName();//获取类名
        String methodName = pjp.getSignature().getName();//获取方法名
        String username = SecurityContextHolder.getContext().getAuthentication().getName();//用springsecurity获取用户名

        //放行
        Object[] args = pjp.getArgs();
        Object proceed = pjp.proceed(args);
        //放行后


        long endTime = System.currentTimeMillis();
        long executionTime=endTime-startTime;
        sysLog.setExecutionTime(executionTime);
        sysLog.setIp(ip);
        sysLog.setMethod(className+"."+methodName);
        sysLog.setUrl(uri);
        sysLog.setVisitTime(new Date());
        sysLog.setUsername(username);
        sysLogService.save(sysLog);//存储日志到数据库中

        return proceed; //返回原方法的返回值
    }
}
//环绕通知,注意方法有返回值

2.前置通知与后置通知

//不必在乎内容,理解格式流程就行
@Component
@Aspect
public class LogAop {

    @Autowired
    private HttpServletRequest request;

    @Autowired
    private ISysLogService sysLogService;

    private Date visitTime; //开始时间
    private Class clazz; //访问的类
    private Method method;//访问的方法

    //前置通知  主要是获取开始时间，执行的类是哪一个，执行的是哪一个方法
    @Before("execution(* com.itheima.ssm.controller.*.*(..))")
    public void doBefore(JoinPoint jp) throws NoSuchMethodException {
        visitTime = new Date();//当前时间就是开始访问的时间
        clazz = jp.getTarget().getClass(); //具体要访问的类
        String methodName = jp.getSignature().getName(); //获取访问的方法的名称
        Object[] args = jp.getArgs();//获取访问的方法的参数

        //获取具体执行的方法的Method对象
        if (args == null || args.length == 0) {
            method = clazz.getMethod(methodName); //只能获取无参数的方法
        } else {
            Class[] classArgs = new Class[args.length];
            for (int i = 0; i < args.length; i++) {
                classArgs[i] = args[i].getClass();
            }
            clazz.getMethod(methodName, classArgs);
        }
    }

    //后置通知
    @After("execution(* com.itheima.ssm.controller.*.*(..))")
    public void doAfter(JoinPoint jp) throws Exception {
        long time = new Date().getTime() - visitTime.getTime(); //获取访问的时长

        String url = "";
        //获取url
        if (clazz != null && method != null && clazz != LogAop.class) {
            //1.获取类上的@RequestMapping("/orders")
            RequestMapping classAnnotation = (RequestMapping) clazz.getAnnotation(RequestMapping.class);
            if (classAnnotation != null) {
                String[] classValue = classAnnotation.value();
                //2.获取方法上的@RequestMapping(xxx)
                RequestMapping methodAnnotation = method.getAnnotation(RequestMapping.class);
                if (methodAnnotation != null) {
                    String[] methodValue = methodAnnotation.value();
                    url = classValue[0] + methodValue[0];

                    //获取访问的ip
                    String ip = request.getRemoteAddr();

                    //获取当前操作的用户
                    SecurityContext context = SecurityContextHolder.getContext();//从上下文中获了当前登录的用户
                    User user = (User) context.getAuthentication().getPrincipal();
                    String username = user.getUsername();

                    //将日志相关信息封装到SysLog对象
                    SysLog sysLog = new SysLog();
                    sysLog.setExecutionTime(time); //执行时长
                    sysLog.setIp(ip);
                    sysLog.setMethod("[类名] " + clazz.getName() + "[方法名] " + method.getName());
                    sysLog.setUrl(url);
                    sysLog.setUsername(username);
                    sysLog.setVisitTime(visitTime);

                    //调用Service完成操作
                    sysLogService.save(sysLog);
                }
            }
        }

    }
}