springboot中使用aop
首先在pom文件中添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
接着编写切面类
@Aspect//这个注解的作用是:将一个类定义为一个切面类
@Component//这个注解的作用:把切面类加入到IOC容器中
public class DemoAspect {
private static final Logger log = LoggerFactory.getLogger(DemoAspect .class);
/*@PointCut注解表示横切点,哪些方法需要被横切*/
/*切点表达式*/
@Pointcut("execution(public * com.simons.cn.springbootdemo.controller.*.*(..))")
public void demoAspect() {
}
/*@Before注解表示在具体的方法之前执行*/
@Before("demoAspect()")
public void before(JoinPoint joinPoint) {
log.info("前置切面before……");
ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = requestAttributes.getRequest();
String requestURI = request.getRequestURI();
//String remoteAddr = request.getRemoteAddr(); //这个方法不一定能获取到用户的真实ip
String remoteAddr = getIpAddr();//自定义获取用户ip方法
String requestMethod = request.getMethod();
String declaringTypeName = joinPoint.getSignature().getDeclaringTypeName();
String methodName = joinPoint.getSignature().getName();
Object[] args = joinPoint.getArgs();
log.info("请求url=" + requestURI + ",客户端ip=" + remoteAddr + ",请求方式=" + requestMethod + ",请求的类名=" + declaringTypeName + ",方法名=" + methodName + ",入参=" + args);
}
/*@After注解表示在方法执行之后执行*/
@After("demoAspect()")
public void after() {
log.info("后置切面after……");
}
/*@AfterReturning注解用于获取方法的返回值*/
@AfterReturning(pointcut = "demoAspect()", returning = "object")
public void getAfterReturn(Object object) {
log.info("afterReturning={}", object.toString());
}
}
/** * 获取用户真实IP地址,不使用request.getRemoteAddr()的原因是有可能用户使用了代理软件方式避免真实IP地址, * 可是,如果通过了多级反向代理的话,X-Forwarded-For的值并不止一个,而是一串IP值 * * @return ip */ private String getIpAddr(HttpServletRequest request) { String ip = request.getHeader("x-forwarded-for"); System.out.println("x-forwarded-for ip: " + ip); if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) { // 多次反向代理后会有多个ip值,第一个ip才是真实ip if( ip.indexOf(",")!=-1 ){ ip = ip.split(",")[0]; } } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); System.out.println("Proxy-Client-IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); System.out.println("WL-Proxy-Client-IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_CLIENT_IP"); System.out.println("HTTP_CLIENT_IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_X_FORWARDED_FOR"); System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("X-Real-IP"); System.out.println("X-Real-IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); System.out.println("getRemoteAddr ip: " + ip); } System.out.println("获取客户端ip: " + ip); return ip; }
关于为什么要这样写才能获取用户真实ip,参见https://www.cnblogs.com/xiaoxing/p/6565573.html