首先我們創建Interceptor，實現HandlerInterceptor覆寫方法：
一、下面我創建了三個攔截器：
MyInterceptor，UserInterceptor，StudentInterceptor
@Component
public class MyInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("MyInterceptor preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("MyInterceptor postHandle");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("MyInterceptor afterCompletion");
}
}
@Component
public class StudentInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("StudentInterceptor preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("StudentInterceptor postHandle");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("StudentInterceptor afterCompletion");
}
}
@Component
public class UserInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("UserInterceptor preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("UserInterceptor postHandle");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("UserInterceptor afterCompletion");
}
}
二、把攔截器加入到攔截器隊列 實現WebMvcConfigurer
@Configuration
public class MyAdapter implements WebMvcConfigurer {
@Resource
private MyInterceptor myInterceptor;
@Resource
private UserInterceptor userInterceptor;
@Resource
private StudentInterceptor studentInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
//1.加入的順序就是攔截器執行的順序，
//2.按順序執行所有攔截器的preHandle
//3.所有的preHandle 執行完再執行全部postHandle 最后是postHandle
registry.addInterceptor(studentInterceptor).addPathPatterns("/**");
registry.addInterceptor(myInterceptor).addPathPatterns("/**");
registry.addInterceptor(userInterceptor).addPathPatterns("/**");
}
}
三、最后訪問controller
@RestController
public class TestController {
@RequestMapping("/test")
public String test() {
return "test";
}
}
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原文鏈接：https://blog.csdn.net/weixin_38362455/article/details/85029748