JSP编程中，tomcat出现如下的两个错误，想请教各位大神这是什么问题，如何解决呀？？

Question

jsptomcat

Answer 1

web.xml文件时这样的<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<filter>
<filter-name>modifycode</filter-name>
<filter-class>com.wsy.Filter.ModifyCode</filter-class>
<init-param>
<param-name>code</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>modifycode</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>

<resource-ref>
    <description>SQL server text app</description>
    <res-ref-name>jdbc/ConnectionPool</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>

<!-- 使用Proxool配置连接池 -->
<servlet>
   <servlet-name>ServletConfigurator</servlet-name>
   <servlet-class>org.logicalcobwebs.proxool.configuration.ServletConfigurator</servlet-class>
  
   <init-param>
     <param-name>propertyFile</param-name>
     <param-value>WEB-INF/classes/Proxool.properties</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet>
   <servlet-name>Admin</servlet-name>
   <servlet-class>org.logicalcobwebs.proxool.admin.servlet.AdminServlet</servlet-class>
    </servlet>    <servlet-mapping>
   <servlet-name>Admin</servlet-name>
   <url-pattern>/Admin</url-pattern>
    </servlet-mapping>

</web-app>

Answer 2

构建路径中缺少jar包...  应该是struts的jar包

Answer 3

java.lang.ClassNotFoundException: org.apache.commons.logging.Log
加一个commons-loggingjar包

Answer 4

不是少包，就是多包，关注下commons-logging.jar