springboot拦截器HandlerInterceptor实现与配置

场景：springboot拦截器HandlerInterceptor实现与配置
记录：NO.244
本例环境：
        apache-tomcat-8.5.57
        jdk：1.8
名词：
        1.HandlerInterceptor包括preHandle()、postHandle()、afterCompletion()
        preHandle()：请求进入Controller前调用。
        postHandle()：Controller的方法调用之后执行，在DispatcherServlet进行视图返回渲染之前被调用，所以可以在这个方法中对Controller处理之后的ModelAndView对象进行操作。
        afterCompletion()：在请求处理后，在DispatcherServlet渲染了对应的视图之后执行，进行资源清理工作。
        2.拦截器是在Spring容器内组件，是Spring框架支持的组件。配置在SpringMVC中的。
一、springboot版本
        1.配置拦截器

@Configuration
public class PlatformWebMvcConfig implements WebMvcConfigurer {
  @Override
  public  void addInterceptors(InterceptorRegistry registry) {
  
    FirstHandlerInterceptor first = new FirstHandlerInterceptor();
    SecondHandlerInterceptor second = new SecondHandlerInterceptor();
    ThirdHandlerInterceptor third = new ThirdHandlerInterceptor();
    registry.addInterceptor(first).addPathPatterns("/**");
    registry.addInterceptor(second).addPathPatterns("/**");
    registry.addInterceptor(third).addPathPatterns("/**");
  }
}

        2.FirstHandlerInterceptor

public class FirstHandlerInterceptor implements HandlerInterceptor {
 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
   System.out.println("FirstHandlerInterceptor->preHandle执行......");
   return true;
 }
 public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,  ModelAndView modelAndView) throws Exception {
   StringBuffer urlBuffer = request.getRequestURL();
 
   System.out.println("FirstHandlerInterceptor->postHandle执行......");
 }
 public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,  Exception ex) throws Exception {
   StringBuffer urlBuffer = request.getRequestURL();
   System.out.println("FirstHandlerInterceptor->afterCompletion执行......");
 }
}

        3.SecondHandlerInterceptor

public class SecondHandlerInterceptor implements HandlerInterceptor {
 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
  System.out.println("SecondHandlerInterceptor->preHandle执行......");
  return true;
 }
 public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
  System.out.println("SecondHandlerInterceptor->postHandle执行......");
 }
 public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
  System.out.println("SecondHandlerInterceptor->afterCompletion执行......");
 }
}

        4.SecondHandlerInterceptor

public class ThirdHandlerInterceptor implements HandlerInterceptor {
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    System.out.println("ThirdHandlerInterceptor->preHandle执行......");
    return true;
  }
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,  ModelAndView modelAndView) throws Exception {
    System.out.println("ThirdHandlerInterceptor->postHandle执行......");
  }
  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,  Exception ex) throws Exception {
    System.out.println("ThirdHandlerInterceptor->afterCompletion执行......");
  }
}

        5.测试Controller

@RestController
@RequestMapping("/fujian")
public class PlatformController {
  @GetMapping("/shangban")
  public String getShangBan(String num) {
    System.out.println("PlatformController->getShangBan执行......");
    System.out.println("开始上班......");
    System.out.println("上班中......");
    System.out.println("报酬 num = " + num + "万");
    System.out.println("下班回家......");
    return "Hey,GoodJob.";
  }
}

        6.测试
        测试URL:  http://localhost:8080/platform/fujian/shangban?num=64
        测试日志：
        
二、xml配置版本
        1.MVC的XML配置新增配置，其它和以上一样。

<!--配置拦截器-->
<mvc:interceptors>
  <mvc:interceptor>
    <mvc:mapping path="/**"/>
    <bean class="com.zbz.interceptor.FirstHandlerInterceptor"/>
  </mvc:interceptor>
  <mvc:interceptor>
    <mvc:mapping path="/**"/>
    <bean class="com.zbz.interceptor.SecondHandlerInterceptor"/>
  </mvc:interceptor>
  <mvc:interceptor>
    <mvc:mapping path="/**"/>
    <bean class="com.zbz.interceptor.ThirdHandlerInterceptor"/>
  </mvc:interceptor>
</mvc:interceptors>

以上，感谢。