SringBoot拦截器和aop自定义过滤实现
一、SringBoot拦截器定义和springmve类似
配置拦截器也很简单,Spring 为什么提供了基础类WebMvcConfigurerAdapter ,我们只需要重写 addInterceptors 方法添加注册拦截器。
实现自定义拦截器只需要3步:
1、创建我们自己的拦截器类并实现 HandlerInterceptor 接口。
2、创建一个Java类继承WebMvcConfigurerAdapter,并重写 addInterceptors 方法。
2、实例化我们自定义的拦截器,然后将对像手动添加到拦截器链中(在addInterceptors方法中添加)。
1.首先定义拦截器
@Component("myInterceptor1") public class MyInterceptor1 implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println(">>>MyInterceptor1>>>>>>>在请求处理之前进行调用(Controller方法调用之前)"); return true;// 只有返回true才会继续向下执行,返回false取消当前请求 } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { System.out.println(">>>MyInterceptor1>>>>>>>请求处理之后进行调用,但是在视图被渲染之前(Controller方法调用之后)"); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { System.out.println(">>>MyInterceptor1>>>>>>>在整个请求结束之后被调用,也就是在DispatcherServlet 渲染了对应的视图之后执行(主要是用于进行资源清理工作)"); } }
2.定义类继承WebMvcConfigurerAdapter,添加拦截器
@Configuration public class MyWebAppConfigurer extends WebMvcConfigurerAdapter { @Autowired private MyInterceptor1 myInterceptor1; @Override public void addInterceptors(InterceptorRegistry registry) { // 多个拦截器组成一个拦截器链 // addPathPatterns 用于添加拦截规则 // excludePathPatterns 用户排除拦截 registry.addInterceptor(myInterceptor1).addPathPatterns("/**"); //registry.addInterceptor(new MyInterceptor2()).addPathPatterns("/**"); super.addInterceptors(registry); } }
二、Springboot中aop技术应用
@Aspect @Component public class HttpAspect { private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class); @Pointcut("execution(public * com.ittx.java1608.springbootdemo1.controller.*.*(..))") public void log() { } @Before("log()") public void doBefore(JoinPoint joinPoint) { ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); HttpServletRequest request = attributes.getRequest(); //url logger.info("url={}", request.getRequestURL()); //method logger.info("method={}", request.getMethod()); //ip logger.info("ip={}", request.getRemoteAddr()); //类方法 logger.info("class_method={}", joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName()); //参数 logger.info("args={}", joinPoint.getArgs()); } @After("log()") public void doAfter() { logger.info("doAfter 222222222222"); } @AfterReturning(returning = "object", pointcut = "log()") public void doAfterReturning(Object object) { logger.info("response={}", object.toString()); } }
2.记得在pom.xml中引入aop依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency>
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