1.编写自定义拦截器的代码如下：
package com.txw.controller.interceptor; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** *自定义拦截器 * @author Adair */ @SuppressWarnings("all") // 注解警告信息 public class MyInterceptor1 implements HandlerInterceptor { /** * 预处理，controller方法执行前 * return true 放行，执行下一个拦截器，如果没有，执行controller中的方法 * return false不放行 * @param request * @param response * @param handler * @return * @throws Exception */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println("MyInterceptor1执行了...前1111"); // 跳转页面 // request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request,response); return true; } /** * 后处理方法，controller方法执行后，success.jsp执行之前 * @param request * @param response * @param handler * @param modelAndView * @throws Exception */ @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { System.out.println("MyInterceptor1执行了...后1111"); // request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request,response); } /** * success.jsp页面执行后，该方法会执行 * @param request * @param response * @param handler * @param ex * @throws Exception */ @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { System.out.println("MyInterceptor1执行了...最后1111"); } }2.使用Tomcat服务运行如图所示： 3.通过浏览器访问http://localhost:8080/如图所示： 4.控制台打印结果如图所示： 5.编写自定义拦截器的代码如下：
package com.txw.controller.interceptor; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** *自定义拦截器 * @author Adair */ @SuppressWarnings("all") // 注解警告信息 public class MyInterceptor2 implements HandlerInterceptor { /** * 预处理，controller方法执行前 * return true 放行，执行下一个拦截器，如果没有，执行controller中的方法 * return false不放行 * @param request * @param response * @param handler * @return * @throws Exception */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println("MyInterceptor1执行了...前1111"); // 跳转页面 // request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request,response); return true; } /** * 后处理方法，controller方法执行后，success.jsp执行之前 * @param request * @param response * @param handler * @param modelAndView * @throws Exception */ @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { System.out.println("MyInterceptor1执行了...后2222"); // request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request,response); } /** * success.jsp页面执行后，该方法会执行 * @param request * @param response * @param handler * @param ex * @throws Exception */ @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { System.out.println("MyInterceptor1执行了...最后2222"); } }6.配置springmvc.xml的代码如下：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 开启注解扫描 --> <context:component-scan base-package="com.txw"/> <!-- 视图解析器对象 --> <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"/> <property name="suffix" value=".jsp"/> </bean> <!--前端控制器，哪些静态资源不拦截--> <mvc:resources location="/css/" mapping="/css/**"/> <mvc:resources location="/images/" mapping="/images/**"/> <mvc:resources location="/js/" mapping="/js/**"/> <!--配置拦截器--> <mvc:interceptors> <!--配置拦截器--> <mvc:interceptor> <!--要拦截的具体的方法--> <mvc:mapping path="/user/*"/> <!--不要拦截的方法--> <!--<mvc:exclude-mapping path=""/>--> <!--配置拦截器对象--> <bean class="com.txw.controller.interceptor.MyInterceptor1"/> </mvc:interceptor> <!--配置第二个拦截器--> <mvc:interceptor> <!--要拦截的具体的方法--> <mvc:mapping path="/**"/> <!--不要拦截的方法--> <!--<mvc:exclude-mapping path=""/>--> <!--配置拦截器对象--> <bean class="com.txw.controller.interceptor.MyInterceptor2"/> </mvc:interceptor> </mvc:interceptors> <!-- 开启SpringMVC框架注解的支持 --> <mvc:annotation-driven /> </beans>7.运行结果如图所示： 证明配置多个拦截器已成功！
