Error creating form bean of class form

今天遇到非正常错误，但用struts1开发项目

当出现错误的时候我马上检查了配置文件和相关类，

可是我没有发现错误，相关信息如下

XML配置

<form-beans>    
    <form-bean name="bbsColumnForm" type="com.websh.column.BbsColumnForm"/>
</form-beans>


<action-mappings>
<action path="/mana/bbs/bbsAction" type="com.websh.column.BbsColumnAction" name="bbsColumnForm" scope="request" validate="false">
             <forward name="toadd" path="/mana/bbs/MyJsp.jsp" />
        <forward name="search" path="/mana/bbs/bbs_columnManage.jsp" />
</action>
<action-mappings>

ACTIONFORM代码如下：

public class BbsColumnForm extends ActionForm {

private static final long serialVersionUID = 1L;
    
    private long bbsColumnId;
    private String bbsColumnName;
    private String bbsColumnDes;
    private String bbsColumnNotice;
    private String parentId;
    private String picture;
    private long bzId;
    private Date creationDate;
    private long creationUserId;
    private String flag;
    
    
    public long getBbsColumnId() {
        return bbsColumnId;
    }

    public void setBbsColumnId(long bbsColumnId) {
        this.bbsColumnId = bbsColumnId;
    }

    public String getBbsColumnName() {
        return bbsColumnName;
    }

    public void setBbsColumnName(String bbsColumnName) {
        this.bbsColumnName = bbsColumnName;
    }

    public String getBbsColumnDes() {
        return bbsColumnDes;
    }

    public void setBbsColumnDes(String bbsColumnDes) {
        this.bbsColumnDes = bbsColumnDes;
    }

    public String getBbsColumnNotice() {
        return bbsColumnNotice;
    }

    public void setBbsColumnNotice(String bbsColumnNotice) {
        this.bbsColumnNotice = bbsColumnNotice;
    }

    public String getParentId() {
        return parentId;
    }

    public void setParentId(String parentId) {
        this.parentId = parentId;
    }

    public String getPicture() {
        return picture;
    }

    public void setPicture(String picture) {
        this.picture = picture;
    }

    public long getBzId() {
        return bzId;
    }

    public void setBzId(long bzId) {
        this.bzId = bzId;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public long getCreationUserId() {
        return creationUserId;
    }

    public void setCreationUserId(long creationUserId) {
        this.creationUserId = creationUserId;
    }

    public String getFlag() {
        return flag;
    }

    public void setFlag(String flag) {
        this.flag = flag;
    }
}

当我调用ACTION时候，错误信息如下

严重: Error creating form bean of class com.websh.column.BbsColumnForm
java.lang.ClassNotFoundException: com.websh.column.BbsColumnForm
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1438)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284)
    at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:182)
    at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:206)
    at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:749)
    at org.apache.struts.action.RequestProcessor.processActionForm(RequestProcessor.java:359)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:253)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:505)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at com.websh.esp.common.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:80)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:843)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:679)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1293)
    at java.lang.Thread.run(Thread.java:619)
2010-12-16 16:02:55 org.apache.struts.action.RequestProcessor processActionCreate
严重: No action instance for path /mana/bbs/bbsAction could be created
java.lang.ClassNotFoundException: com.websh.column.BbsColumnAction
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1438)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284)
    at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:182)
    at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:206)
    at org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:324)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:268)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:505)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at com.websh.esp.common.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:80)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:843)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:679)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1293)
    at java.lang.Thread.run(Thread.java:619)

原来不是我配置出现了问题，而是IDE没有编译我写的ACTION和ACTIONFORM，

去到发布后的项目的WEB-INF目录下的CLASS文件找这些类的.class文件，结果

没有找到。

搞半天才发现这个问题！！！  所以找不到FORM不一定是配置出错！！

-----------------------------------------------END