public interface Filter {  
//Servlet容器（如Tomcat）在初始化這個Filter時調(diào)用，一般用于初始化一些資源  
public default void init(FilterConfig filterConfig) throws ServletException {}  
//這個方法是具體執(zhí)行過濾器邏輯的方法  
//另外chain變量是過濾器鏈，可以使用這個變量來決定這個請求是否可以向下流轉(zhuǎn)  
public void doFilter(ServletRequest request, ServletResponse response,  
FilterChain chain) throws IOException, ServletException;  
//Servlet容器（如Tomcat）在關(guān)閉前會銷毀Filter，一般用于資源的釋放  
public default void destroy() {}  
}  

// 過濾器  
package com.example.demo.filter.one;  
@WebFilter(filterName = "filter-one", urlPatterns = "/bad/*")  
public class FilterOne implements Filter {  
@Override  
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {  
//執(zhí)行Filter邏輯  
System.out.println("這是Filter過濾器1號");  
//讓請求繼續(xù)進入Filter鏈的下一個節(jié)點  
chain.doFilter(request, response);  
}  
}  
// 啟動類  
@SpringBootApplication  
@ServletComponentScan(basePackages = "com.example.demo.filter.one")  
public class SpringBootDemoApplication {  
public static void main(String[] args) {  
SpringApplication.run(SpringBootDemoApplication.class, args);  
}  
}  

// 過濾器  
public class FilterTwo implements Filter {  
@Override  
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {  
//執(zhí)行Filter邏輯  
System.out.println("這是Filter過濾器2號");  
//讓請求繼續(xù)進入Filter鏈的下一個節(jié)點  
chain.doFilter(request, response);  
}  
}  
// 配置類  
@Configuration  
public class FilterConfiguration {  
@Bean  
public FilterRegistrationBean<FilterTwo> filterRegistrationBean() {  
FilterTwo filterTwo = new FilterTwo();  
FilterRegistrationBean<FilterTwo> filterRegistrationBean = new FilterRegistrationBean<>();  
filterRegistrationBean.setFilter(filterTwo);  
//設(shè)置過濾器名、過濾規(guī)則  
filterRegistrationBean.setName("filter-two");  
filterRegistrationBean.addUrlPatterns("/bad/*");  
return filterRegistrationBean;  
}  
}  

// 過濾器  
@Component  
public class FilterThree implements Filter {  
@Override  
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {  
//執(zhí)行Filter邏輯  
System.out.println("這是Filter過濾器3號");  
//讓請求繼續(xù)進入Filter鏈的下一個節(jié)點  
chain.doFilter(request, response);  
}  
}  
// 配置類  
@Configuration  
public class FilterConfiguration {  
@Bean  
public DelegatingFilterProxyRegistrationBean delegatingFilterProxyRegistrationBean() {  
DelegatingFilterProxyRegistrationBean delegatingFilterProxyRegistrationBean = new DelegatingFilterProxyRegistrationBean("filterThree");  
delegatingFilterProxyRegistrationBean.setName("filter-three");  
delegatingFilterProxyRegistrationBean.addUrlPatterns("/bad/*");  
return delegatingFilterProxyRegistrationBean;  
}  
}  

public interface HandlerInterceptor {  
//在請求被處理前（到達Controller前）進行處理，如果返回false，那么請求不往下進行  
default boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)  
throws Exception {  
return true;  
}  
//在請求被處理后（執(zhí)行完Controller邏輯后）進行處理  
default void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,  
@Nullable ModelAndView modelAndView) throws Exception {  
}  
//在頁面渲染結(jié)束后執(zhí)行，一般用于資源釋放  
default void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,  
@Nullable Exception ex) throws Exception {  
}  
}  

// 攔截器  
@Component  
public class HandlerInterceptorOne implements HandlerInterceptor {  
@Override  
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {  
System.out.println("請求到Controller前-執(zhí)行 HandlerInterceptor 邏輯");  
return true;  
}  
@Override  
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {  
System.out.println("Controller執(zhí)行完后-執(zhí)行 HandlerInterceptor 邏輯");  
}  
@Override  
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {  
System.out.println("返回視圖前-執(zhí)行 HandlerInterceptor 邏輯");  
}  
}  
// 配置類  
@Configuration  
public class InterceptorConfiguration implements WebMvcConfigurer {  
@Autowired  
private HandlerInterceptorOne handlerInterceptorOne;  
@Override  
public void addInterceptors(InterceptorRegistry registry) {  
//這冊攔截器  
registry.addInterceptor(handlerInterceptorOne)  
//設(shè)置攔截的路徑  
.addPathPatterns("/bad/*")  
//設(shè)置不攔截的路徑（排除這些路徑）  
.excludePathPatterns("/bad/test");  
}  
}