- Interceptor ( intercept all address control layer. Filter:)
- Creating a class that implements the interface HandlerInterceptor
package com.zhiyou100.wyf.interceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; public class MyInterceptor implements HandlerInterceptor{ @Override public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3) throws Exception { System.out.println("结束"); } @Override public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3) throws Exception { System.out.println("预备"); } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception { Object name = request.getSession().getAttribute("name"); if(name!=null) { return true; }else { response.sendRedirect("../denglu.jsp"); return false; } } }
- A method of rewriting the interface
- The class configuration to create springmvc file.
- Creating a class that implements the interface HandlerInterceptor
<!-- 配置拦截器 --> <mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/user/**"/> <mvc:exclude-mapping path="/user/login"/> <mvc:exclude-mapping path="/user/register"/> <mvc:exclude-mapping path="/user/stu1"/> <bean class="com.zhiyou100.wyf.interceptor.MyInterceptor"></bean> </mvc:interceptor> </mvc:interceptors>