提交jsp页面后，只显示.do空白页面，不能转到下一页面了

Question

在jsp页面输入完信息后一提交就进入.do页面（空白页面,url显示的那个do），不能跳转到下一页面。正确的情况应该是forword到另一个jsp.
web.xml:
<?xm version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd"><web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="java.sun.com/xml/ns/j2eeweb-app_2_4.xsd"
version="2.4">
<display-name>Welcome to Tomcat</display-name>
<description>
Forum
</description>
<resource-ref>
  <description>SqlServer Datasource </description>
  <res-ref-name>jdbc/elaborate</res-ref-name>
  <res-type>javax.sql.DataSource</res-type>
  <res-auth>Container</res-auth>
  </resource-ref><servlet>
<servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
     <init-param>
      <param-name>application</param-name>
      <param-value>ApplicationResources</param-value>
    </init-param>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
</servlet>
<servlet>
<servlet-name>DownloadServlet</servlet-name>
<servlet-class>com.protoss.download.Download</servlet-class>
</servlet>
<servlet>
<servlet-name>DownloadServlet2</servlet-name>
<servlet-class>com.protoss.download.Download2</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>DownloadServlet</servlet-name>
<url-pattern>/download</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>DownloadServlet2</servlet-name>
<url-pattern>/download2</url-pattern>
</servlet-mapping>
<!--Struts Tag Library Descriptions-->
<taglib>
<taglib-uri>/struts-bean</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/struts-html</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/struts-logic</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-logic.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/struts-nested</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-nested.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/struts-tiles</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-tiles.tld</taglib-location>
</taglib>
<taglib>
    <taglib-uri>/jstl/c</taglib-uri>
    <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
  </taglib>
<taglib>
<taglib-uri>/struts-temlpate</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-template.tld</taglib-location>
</taglib>
</web-app>struts-config.xml:
<?xml version="1.0" encoding="ISO-8859-1" ?><!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
   <struts-config>
 <form-beans>
   <form-bean name="newTopicForm" type="com.protoss.forum.NewTopicForm"/>
    </form-beans>
 <global-forwards>
  <forward name="newTopicCreated" path="/viewNewTopic.jsp"/>
 </global-forwards>
 <action-mappings>
  <action path="/createNewTopic" 
         type="com.protoss.forum.AddNewTopic"
                 name="newTopicForm" 
                 scope="request"
                 validate="true"
                 input="/createNewTopic.jsp"> 
         <forward
                    name="success"
                    path="/newTopicCreated.jsp"/>         
        </action>
      </action-mappings>
 <message-resources parameter="ApplicationResources"/>  
  </struts-config>

Answer 1

应该是处理业务的action里出错了，看看你action代码里哪里没有抓异常

Answer 2

Action 出错
或者你的config配置错误

Answer 3

处理业务的action如下：
package com.protoss.forum;
import org.apache.struts.action.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public final class AddNewTopic extends Action {    public ActionForward execute(ActionMapping mapping,
                                 ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response)
        throws Exception {
        NewTopicBean service = new NewTopicBean();
        NewTopic topic = new NewTopic();
        NewTopicForm topicForm = (NewTopicForm) form;
        topic=topicForm.getNewTopic();
        try {
            service.addNewTopic(topic);
            ActionMessages messages = new ActionMessages();
            ActionMessage message = new ActionMessage("message.topic.insert.success",topic.getTitle() );
            messages.add( ActionMessages.GLOBAL_MESSAGE, message );
            saveMessages( request, messages );
            request.setAttribute("topic",topic);
            return (mapping.findForward("success"));
        }
        catch( Exception de ) {
            ActionErrors errors = new ActionErrors();
            ActionError error = new ActionError("error.topic.databaseException");
            errors.add( ActionErrors.GLOBAL_ERROR, error );
            saveErrors( request, errors );
            return (mapping.findForward("error"));
        }
    }
}

Answer 4

还有这个:
package com.protoss.forum;
import com.protoss.util.DatabaseConn1;
import java.sql.*;
import javax.sql.*;
import java.io.*;
import java.util.*;
public class NewTopicBean
{
private   Connection conn ;
public NewTopicBean()throws Exception
{
this.conn=DatabaseConn1.getConnection();
}
public void addNewTopic(NewTopic topic)throws Exception
{
     this.executeHelper("insert into newtopic (FTitle,FContent,FAuthor,FScore,FType) values('"+topic.getTitle()+"','"+topic.getContent()+"',"+topic.getAuthor()+",'"+topic.getScore()+"',"+topic.getType()+")");
}
public Collection getNewTopic()throws Exception
{
return this.getNewTopicHelper("select * from newtopic");
 }
  
 public Collection getNoReplyTopic()throws Exception
{
return this.getNewTopicHelper("select * from newtopic where  FReply='0'");
 }
 
 public void deleteNoReplyTopic(int reply)throws Exception
 {
  if(reply==0){
  try
  {
  this.executeHelper("delete from newtopic where FReply='"+reply+"'");
  }
  catch(Exception e)
  {
  e.printStackTrace();
  throw e;
  }
 }
 }
  private Collection getNewTopicHelper(String sql)throws Exception
  {
    Statement stmt=conn.createStatement();
     ResultSet rst=stmt.executeQuery(sql);
     Collection ret=new ArrayList();
     while(rst.next())
     {
      NewTopic temp=new NewTopic();
      temp.setId(rst.getInt("FId"));
      temp.setTitle(rst.getString("FTitle"));
      temp.setContent(rst.getString("FContent"));
      temp.setAuthor(rst.getString("FAuthor"));
      temp.setScore(rst.getInt("FScore"));
      temp.setType(rst.getString("FType"));
        ret.add(temp);
     }
     return ret;
  }
  
  private void executeHelper(String sql)throws Exception
  {
    Statement stmt=conn.createStatement();
 stmt.executeUpdate(sql);
  }
}

Answer 5

我把所有的和数据库相关的都try{}catch{}了。但是依旧，不向下一个进行，和下一个有关系吗?因为下一个页面还没有做好

Answer 6

我测试了一下，异常如下：
exception org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
root cause java.lang.NullPointerException
org.apache.jsp.error_jsp._jspService(error_jsp.java:55)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)这是为什么

Answer 7

跪求解决方法了，谁能说一下struts是如何参数的传递过程，像jsp中request获得参数一样，struts中action，config,actionform,页面之间参数是如何传递。