Demostración de ejemplo de AOP

Aop

1. Todo el mundo sabe que la AOP se utiliza principalmente para la supervisión del rendimiento, el registro y otras funciones. Hoy implementaremos la función de registro de operaciones a través de código específico

   1. Crear proyecto, dependencias de importación

   2. Crear base de datos

      CREATE TABLE sysLog(
       id VARCHAR2(32) default SYS_GUID() PRIMARY KEY, - primary key, meaningless
       visitTime timestamp, - visit time
       username VARCHAR2(50), - username
      ip VARCHAR2(30),	-- ip
      url VARCHAR2(50),	-- url
       executionTime int, - the execution time of a method
       method VARCHAR2(200) - method of execution
      )
      

   3. Clase de modelo

      package com.junyang.ssm.domain;
      	
      import java.util.Date;
      
      /**
         * System logging model
       */
      public class SysLog {
          private String id;
          private Date visitTime;
          private String visitTimeStr;
          private String username;
          private String ip;
          private String url;
          private Long executionTime;
          private String method;
      
          public String getId() {
              return id;
          }
      
          public void setId(String id) {
              this.id = id;
          }
      
          public Date getVisitTime() {
              return visitTime;
          }
      
          public void setVisitTime(Date visitTime) {
              this.visitTime = visitTime;
          }
      
          public String getVisitTimeStr() {
              return visitTimeStr;
          }
      
          public void setVisitTimeStr(String visitTimeStr) {
              this.visitTimeStr = visitTimeStr;
          }
      
          public String getUsername() {
              return username;
          }
      
          public void setUsername(String username) {
              this.username = username;
          }
      
          public String getIp() {
              return ip;
          }
      
          public void setIp(String ip) {
              this.ip = ip;
          }
      
          public String getUrl() {
              return url;
          }
      
          public void setUrl(String url) {
              this.url = url;
          }
      
          public Long getExecutionTime() {
              return executionTime;
          }
      
          public void setExecutionTime(Long executionTime) {
              this.executionTime = executionTime;
          }
      
          public String getMethod() {
              return method;
          }
      
          public void setMethod(String method) {
              this.method = method;
          }
      }
      

   4. Código AOP

      package com.junyang.ssm.web;
      
      import com.junyang.ssm.domain.SysLog;
      import com.junyang.ssm.service.SysLogService;
      import org.aspectj.lang.JoinPoint;
      import org.aspectj.lang.annotation.After;
      import org.aspectj.lang.annotation.Aspect;
      import org.aspectj.lang.annotation.Before;
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.security.core.context.SecurityContext;
      import org.springframework.security.core.context.SecurityContextHolder;
      import org.springframework.security.core.userdetails.User;
      import org.springframework.stereotype.Component;
      import org.springframework.web.bind.annotation.RequestMapping;
      
      import javax.servlet.http.HttpServletRequest;
      import java.lang.reflect.Method;
      import java.util.Date;
      
      @Component
      @Aspect
      public class LogAop {
          @Autowired
          private HttpServletRequest request;
          @Autowired
          private SysLogService sysLogService;
          private Date visitTime; //Visit time
               private Class clazz; //Accessed class
               private Method method; //Access method
      
               //Pre-notification
          @Before("execution(* com.junyang.ssm.web.*.*(..))")
          public void doBefore(JoinPoint jp) throws NoSuchMethodException {
                       visitTime = new Date(); //The time when the method starts to visit
                       clazz=jp.getTarget().getClass(); //Accessed class
                       String methodName = jp.getSignature().getName(); //Get the name of the access method
                       Object[] args = jp.getArgs(); //Get the parameters of the access method
              if(args==null||args.length==0){
                               method = clazz.getMethod(methodName); //Only get methods without parameters
              }else{
                  Class[] classArgs = new Class[args.length];
                  for(int i=0;i<args.length;i++){
                      classArgs[i]=args[i].getClass();
                  }
                  method =clazz.getMethod(methodName,classArgs);
              }
      
          }
               //Post notification
          @After("execution(* com.junyang.ssm.web.*.*(..))")
          public void doAfter(JoinPoint jp){
                       long time = new Date().getTime()-visitTime.getTime(); //The duration of the visit
                       String url = ""; //URL to visit
              if(clazz!=null&&method!=null&&clazz!=LogAop.class&&clazz!=SysLogController.class){
                  RequestMapping classAnnotation = (RequestMapping) clazz.getAnnotation(RequestMapping.class);
                  if(classAnnotation!=null){
                      String[] classValue = classAnnotation.value();
                      RequestMapping methodAnnotation = method.getAnnotation(RequestMapping.class);
                      if(methodAnnotation!=null){
                          String[] methodValue = methodAnnotation.value();
                          url = classValue[0]+methodValue[0];
                          String ip = request.getRemoteAddr();
                          SecurityContext context = SecurityContextHolder.getContext();
                          User user = (User) context.getAuthentication().getPrincipal();
                          String username = user.getUsername();
                          SysLog sysLog = new SysLog();
                          sysLog.setExecutionTime(time);
                          sysLog.setIp(ip);
                          sysLog.setUrl(url);
                          sysLog.setUsername(username);
                                               sysLog.setMethod("[class name]"+clazz.getName()+"[method name]"+method.getName());
                          sysLog.setVisitTime(visitTime);
                          sysLogService.save(sysLog);
                      }
                  }
              }
      
          }
      }
      
      

   5. Se omiten los códigos de controlador, servicio y dao. Porque es una operación de inserción normal.