在做文件上传，对于上传的不是图片类型进行判断，如果不是则重新输入。但是输入页面中有个select是通过一个action从数据库中取得数据的，所以说result 的input在配置时，不应该直接挑转到页面，而是应该跳转到action 但是现在说HTTP Status 404 - There is no Action mapped for namespace / and action name /getClasses.action.如果直接访问时可以的（直接输入action，则跳转到输入页面）。求解释。
struts配置。
- XML code
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <constant name="struts.i18n.encoding" value="UTF-8"/> <constant name="struts.custom.i18n.resources" value="globalMessages" /> <package name="StudentManagement" extends="struts-default" namespace="/"> <action name="TeacherList" class="com.dcj.action.TeacherManagementAction" method="TeacherList"> <result name="success">admin/teacherManage.jsp</result> </action> <action name="addTeacher" class="com.dcj.action.TeacherManagementAction" method="addTeacher"> <result name="success" type="redirectAction">TeacherList</result> </action> <action name="getClasses" class="com.dcj.action.ClassManagementAction" method="getClasses"> <result name="success">teacher/addStudent.jsp</result> </action> <action name ="addStudent" class ="com.dcj.action.StudentManagementAction" > <interceptor-ref name ="fileUpload" > <param name="allowedTypes">image/bmp,image/png.image/jpeg,/image/gif</param> </interceptor-ref> <interceptor-ref name="defaultStack"/> <result name ="success" >student/studentInfo.jsp </result > <result name ="input" type="chain">getClasses.action</result> </action > </package> </struts>
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