springboot中定義攔截器

 

首先回憶一下springmvc中攔截器的使用：

1.定義一個類 implements HandlerInterceptor,實現HandlerInterceptor接口中的方法

　　preHandler               1

　　postHandler              2

　　afterCompletion        3

2.配置攔截器 springmvc.xml

<mvc:Interceptors>
　　<mvc:Interceptor>
　　　　<path="/user/*">
　　　　<exinclud path="/user/login">
　　</mvc:Interceptor>
</mvc:Interceptors>

springboot 中不建議使用xml文件，在使用攔截器的時候springboot框架自動配置

springboot中定義和使用攔截器如下：

1.開發自定義攔截器類

攔截器類 implements HandlerInterceptor

public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        System.out.println("=======1=======");
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        System.out.println("========2========");
    }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        System.out.println("==========3========");
    }
}

 

2.配置攔截器，springboot自動配置（@Configuration）

@Configuration
public class MyWebConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor())
                .addPathPatterns("/user/test")       //攔截項目中的哪些請求
                .excludePathPatterns("/user/save");  //對項目中的哪些請求不攔截
    }
}