如何编写Spring框架中的拦截器配置示例代码？

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拦截器类创建如下：

javapackage com.zhiyou100.wyf.interceptor;

import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;

public class FilterInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // 拦截逻辑 return true; }}

拦截器(拦截都是控制层的地址。 filter: )

创建一个类 实现接口 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; } } }

重写接口的中方法

把创建的类配置到springmvc文件中。

<!-- 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>

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