cvc-complex-type.2.4.a: Invalid content was found starting with element

在写xml的时候又一次总是报cvc-complex-type.2.4.a: Invalid content was found starting with element 错误，还出现小红叉，在网上找了很多，有说是把报红叉的代码写在<jsp-config></jsp-config>之间，试了之后发现完全没用。
后来在外文网站上找到了一个方法就把问题解决了
在eclipse中配置xmlcatalog
1、 Location: D:\eclipse3.3\springmodules-cache.xsd （springmodules-cache.xsd在本地的路径）
Key Type: Namespace Name
Key: http://www.springmodules.org/schema/cache/springmodules-cache.xsd
2、Location: D:\eclipse3.3\springmodules-ehcache.xsd（本地路径）
Key Type: Schema Location
Key: http://www.springmodules.org/schema/cache/springmodules-ehcache.xsd
然后再将这连个xsd加入到web.xml中就搞定了

<?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  http://www.springmodules.org/schema/cache/springmodules-cache.xsd http://www.springmodules.org/schema/cache/springmodules-ehcache.xsd"    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd       
     ">  
    <!--OS Work Flow -->  
    <display-name>OSWorkflow Example App</display-name>  
    <description>OSWorkflow Example App</description>  

    <servlet>  
        <servlet-name>SOAPWorkflow</servlet-name>  
        <servlet-class>  
            com.opensymphony.workflow.soap.SOAPWorkflowServlet  
        </servlet-class>  
    </servlet>  
    <servlet>  
        <description>  
            This is the description of my J2EE component  
        </description>  
        <display-name>  
            This is the display name of my J2EE component  
        </display-name>  
        <servlet-name>Osworkflow</servlet-name>  
        <servlet-class>net.caiban.servlet.Osworkflow</servlet-class>  
    </servlet>  
    <servlet>  
        <description>  
            This is the description of my J2EE component  
        </description>  
        <display-name>  
            This is the display name of my J2EE component  
        </display-name>  
        <servlet-name>DoWorkflow</servlet-name>  
        <servlet-class>net.caiban.servlet.DoWorkflow</servlet-class>  
    </servlet>  
    <servlet>  
        <description>  
            This is the description of my J2EE component  
        </description>  
        <display-name>  
            This is the display name of my J2EE component  
        </display-name>  
        <servlet-name>CreateWorkflow</servlet-name>  
        <servlet-class>net.caiban.servlet.CreateWorkflow</servlet-class>  
    </servlet>  
  
    <servlet-mapping>  
        <servlet-name>SOAPWorkflow</servlet-name>  
        <url-pattern>/soap/*</url-pattern>  
    </servlet-mapping>  
  
    <servlet-mapping>  
        <servlet-name>Osworkflow</servlet-name>  
        <url-pattern>/servlet/Osworkflow</url-pattern>  
    </servlet-mapping>  
    <servlet-mapping>  
        <servlet-name>DoWorkflow</servlet-name>  
        <url-pattern>/servlet/DoWorkflow</url-pattern>  
    </servlet-mapping>  
    <servlet-mapping>  
        <servlet-name>CreateWorkflow</servlet-name>  
        <url-pattern>/servlet/CreateWorkflow</url-pattern>  
    </servlet-mapping>  
  
    <welcome-file-list>  
        <welcome-file>default.jsp</welcome-file>  
        <welcome-file>index.jsp</welcome-file>  
    </welcome-file-list>  
    <resource-ref>  
        <res-ref-name>jdbc/oswf</res-ref-name>  
        <res-type>javax.sql.DataSource</res-type>  
        <init-param driverClassName="com.mysql.jdbc.Driver" />  
        <init-param url="jdbc:mysql://localhost:3306/osworkflow" />  
        <init-param user="root" />  
        <init-param password="123465" />  
        <init-param max-connections="20" />  
        <init-param max-idle-time="30" />  
    </resource-ref>  
    <!--OS Work Flow -->  
</web-app>