为什么我的servlet.xml中增加这样的代码后，就报错呢？

本来我开发的网站可以正常运行的，但是需要增加一个添加标签的功能，当一切底层的代码都部署好了之后，我在servlet.xml中添加了红色部分的代码，结果完全进不去了,http 500错误，代码如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
  <bean id="bookstoreController" class="org.mmxbb.bookstore.mvc.BookStoreController">
<property name="methodNameResolver"><ref bean="bookstoreMethodNameResolver" /></property>
</bean>
  <bean id="bookstoreMethodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
<property name="mappings">
<props>
<prop key="/regSuccess.do">regSuccessHandler</prop>
<prop key="/index.do">indexHandler</prop>
<prop key="/webleft.do">webleftHandler</prop>
<prop key="/search.do">searchHandler</prop>
<prop key="/webhead.do">webheadHandler</prop>
<prop key="/bottom.do">bottomHandler</prop>
<prop key="/logout.do">logoutHandler</prop>
<prop key="/showCart.do">showCartHandler</prop>
<prop key="/adminhead.do">adminheadHandler</prop>
<prop key="/adminright.do">adminrightHandler</prop>
<prop key="/adminleft.do">adminleftHandler</prop>
<prop key="/adminindex.do">adminindexHandler</prop>

</props>
</property>
</bean>

  <bean id="orderinfoController" class="org.mmxbb.bookstore.mvc.order.OrderinfoController">
<property name="methodNameResolver"><ref bean="orderinfoMethodNameResolver" /></property>
<property name="orderinfoService"><ref bean="orderinfoService" /></property>
<property name="orderdetailService"><ref bean="orderdetailService" /></property>
</bean>
  <bean id="orderinfoMethodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
<property name="mappings">
<props>
<prop key="/myOrder.do">myOrderHandler</prop>
<prop key="/orderList.do">orderListHandler</prop>
<prop key="/detailOrder.do">detailOrderHandler</prop>
<prop key="/updateOrder.do">updateOrderHandler</prop>
 

</props>
</property>
</bean>

<bean id="taginfoController" class="org.mmxbb.bookstore.mvc.tag.TaginfoController">
<property name="methodNameResolver"><ref bean="taginfoMethodNameResolver" /></property>
<property name="taginfoService"><ref bean="taginfoService" /></property>
</bean>
<bean id="taginfoMethodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
<property name="mappings">
<props>
<prop key="/myTag.do">myTagHandler</prop>
</props>
</property>
</bean>


<bean id="userController" class="org.mmxbb.bookstore.mvc.user.UserController">
<property name="methodNameResolver"><ref bean="userMethodNameResolver" /></property>
<property name="userService"><ref bean="userService" /></property>
</bean>
<bean id="userMethodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
<property name="mappings">
<props>
<prop key="/userList.do">userListHandler</prop>
</props>
</property>
</bean>

<bean id="categoryController" class="org.mmxbb.bookstore.mvc.cate.CategoryController">
<property name="methodNameResolver"><ref bean="categoryMethodNameResolver" /></property>
<property name="categoryService"><ref bean="categoryService" /></property>
</bean>
<bean id="categoryMethodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
<property name="mappings">
<props>
<prop key="/categoryList.do">cateListHandler</prop>
<prop key="/delCate.do">delCateHandler</prop>
<prop key="/showUpdateCate.do">showUpdateCateHandler</prop>
</props>
</property>
</bean>


 
<bean id="addOrderFormController" class="org.mmxbb.bookstore.mvc.order.AddOrderinfoFormController">
<property name="commandName"><value>addOrderForm</value></property>
<property name="commandClass"><value>org.mmxbb.bookstore.model.Orderinfo</value></property>
<property name="formView"><value>web/order/shopCart</value></property>
<property name="successView"><value>web/order/addOrderSuccess</value></property>
<property name="orderinfoService"><ref bean="orderinfoService" /></property>
<property name="orderdetailService"><ref bean="orderdetailService" /></property>
</bean>

<bean id="addTagFormController" class="org.mmxbb.bookstore.mvc.tag.AddTaginfoFormController">
<property name="commandName"><value>addTagForm</value></property>
<property name="commandClass"><value>org.mmxbb.bookstore.model.Taginfo</value></property>
<property name="formView"><value>admin/book/detail</value></property>
<property name="successView"><value>web/tag/addTagSuccess</value></property>
<property name="taginfoService"><ref bean="taginfoService" /></property>
</bean>

<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="interceptors">
<list>
<ref bean="openSessionInViewInterceptor" />
</list>
</property>
<property name="mappings">
<props>
<prop key="/reg.do">addUserFormController</prop>
<prop key="/login.do">loginUserFormController</prop>
<prop key="/regSuccess.do">bookstoreController</prop>
<prop key="/loginSuccess.do">bookstoreController</prop>
<prop key="/regFailed.do">bookstoreController</prop>
<prop key="/loginFailed.do">bookstoreController</prop>
<prop key="/userList.do">userController</prop>
<prop key="/addCategory.do">addCategoryFormController</prop>
<prop key="/categoryList.do">categoryController</prop>
<prop key="/delCate.do">categoryController</prop>
<prop key="/showUpdateCate.do">categoryController</prop>
<prop key="/updateCategory.do">updateCategoryFormController</prop>
<prop key="/showAddBook.do">bookinfoController</prop>
<prop key="/addBook.do">addBookinfoFormController</prop>
<prop key="/bookList.do">bookinfoController</prop>
<prop key="/delBook.do">bookinfoController</prop>
<prop key="/showUpdateBook.do">bookinfoController</prop>
<prop key="/detailBook.do">bookinfoController</prop>
<prop key="/updateBook.do">updateBookinfoFormController</prop>
<prop key="/cateBook.do">bookinfoController</prop>
<prop key="/index.do">bookstoreController</prop>
<prop key="/webleft.do">bookstoreController</prop>
<prop key="/webhead.do">bookstoreController</prop>
<prop key="/search.do">bookstoreController</prop>
<prop key="/searchResult.do">searchBookinfoFormController</prop>
<prop key="/bottom.do">bookstoreController</prop>
<prop key="/latestbook.do">bookinfoController</prop>
<prop key="/logout.do">bookstoreController</prop>
<prop key="/buyBook.do">bookinfoController</prop>
<prop key="/delShopCart.do">bookinfoController</prop>
<prop key="/showCart.do">bookstoreController</prop>
<prop key="/addOrder.do">addOrderFormController</prop>
<prop key="/addTag.do">addTagFormController</prop>
<prop key="/adminleft.do">bookstoreController</prop>
<prop key="/adminright.do">bookstoreController</prop>
<prop key="/adminhead.do">bookstoreController</prop>
<prop key="/adminindex.do">bookstoreController</prop>
<prop key="/adminlogin.do">loginAdminuserFormController</prop>
<prop key="/myOrder.do">OrderinfoController</prop>
<prop key="/myTag.do">TaginfoController</prop>
<prop key="/orderList.do">orderinfoController</prop>
<prop key="/detailOrder.do">orderinfoController</prop>
<prop key="/updateOrder.do">orderinfoController</prop>
</props>
</property>
</bean>

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="requestContextAttribute"><value>rc</value></property>
<property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property>
<property name="prefix"><value>/WEB-INF/view/</value></property>
<property name="suffix"><value>.jsp</value></property>
<property name="contentType"><value>text/html;charset=GB2312</value></property>
</bean>
</beans>

请各位高手指点一下，我应该怎么按照什么路线来检查如何出现这个错误，然后解决它

不清楚，观摩一下下。。。

谢谢了

自己顶一下