spring mcv 拦截器

àì夳堔傛蜴生んèń 2022-05-16 05:12 83阅读 0赞

一：在spring-mvc.xnl中修改

![70][]

<mvc:resources location="/adduction/" mapping="/adduction/**"/>
    	<mvc:interceptors>
    		<mvc:interceptor>
    
                
    		    <mvc:mapping path="/**" />
    
                
      	        <mvc:exclude-mapping path="/user/signIn.do"/>
    
                
    			<bean class="com.lnfs.controller.SecurityInterceptor" />
    		</mvc:interceptor>
    	</mvc:interceptors>

二：新建SecurityInterceptor类，存放拦截器

@Override
    	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)throws Exception {
    		System.out.println("this is afterCompletion of LoginInterceptor");
    	}
    	
    	@Override
    	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)throws Exception {
    		System.out.println("this is postHandle of LoginInterceptor");
    	}
    	
    	@Override
    	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception {
    	System.out.println("this is preHandle of LoginInterceptor");
    	System.err.println(request.getRequestURI());
    	HttpSession session=request.getSession();
    	
    	User user=(User)session.getAttribute("user");
    	if(user==null){
    		System.out.println("no user in LoginInterceptor!!!");
    //		request.getRequestDispatcher("/WEB-INF/view/user/userlogin.jsp").forward(request, response);
    		 response.sendRedirect(request.getContextPath() + "/");
    		return false;
    	}
    
    	//返回true代表继续往下执行
    	return true;
    	}

完成！！但是只是拦截了controller,并不能拦截jsp

三：将JSP存放到WEB-INF下

修改web.xml

<servlet-mapping>    
            <servlet-name>SpringMVC</servlet-name>    
            <url-pattern>*.do</url-pattern>    
        </servlet-mapping>

**ok**

[70]: /images/20220516/76fa7c65515a458286bbb5d621d55db1.png