我是 ofbiz 的新手。所以我的问题是有什么错误请原谅我的错误。我是 ofbiz 的新手，所以我不知道 ofbiz 中的一些术语。有时我的问题不清楚，因为缺乏对 ofbiz 的了解。所以尝试理解我的问题并就我的水平给我一个很好的解决方案。因为有些解决方案的水平非常高，我无法理解。所以请用好的例子给出解决方案。
我的项目“productionmgntSystem”位于“ofbiz/hot-deploy”文件夹中。在我的项目中，我有一个名为“app_details_1.ftl”的文件，其中包含以下编码
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<!--<meta http-equiv="Content-Type" content="multipart/form-data; charset=ISO-8859-1">-->
<title>Insert title here</title>
<script TYPE="TEXT/JAVASCRIPT" language=""JAVASCRIPT">
function uploadFile()
{
//alert("Before calling upload.jsp");
window.location='<@ofbizUrl>testing_service1</@ofbizUrl>'
}
function logout1()
{
//alert("Logout1");
alert("<@ofbizUrl>logout1</@ofbizUrl>");
window.location='<@ofbizUrl>logout1</@ofbizUrl>'
}
</script>
</head>
<!-- <form action="<@ofbizUrl>testing_service1</@ofbizUrl>" enctype="multipart/form-data" name="app_details_frm"> -->
<form enctype="multipart/form-data" action="<@ofbizUrl>uploadAttachFile</@ofbizUrl>" METHOD=POST>
<center style="height: 299px; ">
<table border="0" style="height: 177px; width: 788px">
<tr style="height: 115px; ">
<td style="width: 103px; ">
<td style="width: 413px; "><h1>APPLICATION DETAILS</h1>
<td style="width: 55px; ">
</tr>
<tr>
<td style="width: 125px; ">Application name : </td>
<td>
<input name="app_name_txt" id="txt_1" value=" " />
</td>
</tr>
<tr>
<td style="width: 125px; ">Excell sheet : </td>
<td>
<input type="file" name="filename"/>
</td>
</tr>
<tr>
<td>
<input type="button" name="logout1_cmd" value="Logout" onclick="logout1()"/>
<!-- <input type="submit" name="logout_cmd" value="logout"/>-->
</td>
<td>
<input type="submit" name="upload_cmd" value="UPLOAD" />
<!-- <input type="button" name="upload1_cmd" value="Upload" onclick="uploadFile()"/> -->
</td>
</tr>
</table>
</center>
</form>
</html>
以下是“controller.xml”文件中的一些编码
..........
..........
...........
<request-map uri="uploadAttachFile">
<security https="true" auth="true"/>
<!-- <event type="simple" invoke="createCommunicationContent" path="component://productionmgntSystem/script/org/ofbiz/productionmgntSystem/CommunicationEventEvents.xml"/> -->
<event type="java" path="org.ofbiz.productionmgntSystem.web_app_req.Uploading" invoke="uploadFile"/>
<response name="AttachementSuccess" type="view" value="AttachementSuccess"/>
<response name="AttachementException" type="view" value="AttachementException"/>
</request-map>
...............
...........
............
<!-- I DEFINED - START -->
<view-map name="AttachmentError" type="ftl" page="file_attach_error.ftl"/>
<view-map name="AttachementException" type="ftl" page="file_attach_error.ftl"/>
<view-map name="AttachementSuccess" type="ftl" page="AttachementSuccess.ftl"/>
<!-- I DEFINED - END -->
...............
...............
.............
以下是文件“AttachementSuccess.ftl”中的编码
<html>
<head>
<title>FILE ATTACH SUCCESS</title>
</head>
<form action="<@ofbizUrl>logout1</@ofbizUrl>" enctype="multipart/form-data" name="file_attach_error_frm">
<table>
<tr>
<td>
<td>
<td>
</tr>
<tr>
<td>
<td>File attachement success</td>
<td>
</tr>
<tr>
<td>
<td><input type="submit" value="LOGOUT"/></td>
<td>
</tr>
</table>
</form>
</html>
以下是文件“file_attach_error.ftl”中的编码
<html>
<head>
<title>FILE ATTACH ERROR</title>
</head>
<form action="<@ofbizUrl>logout1</@ofbizUrl>" enctype="multipart/form-data" name="file_attach_error_frm">
<table>
<tr>
<td>
<td>
<td>
</tr>
<tr>
<td>
<td>File attachement error</td>
<td>
</tr>
<tr>
<td>
<td><input type="submit" value="LOGOUT"/></td>
<td>
</tr>
</table>
</form>
</html>
以下是文件“Uploading.java”中的编码
//UPLOADING A CONTENT TO THE SERVER
package org.ofbiz.productionmgntSystem.web_app_req;
import java.io.File;
import java.nio.ByteBuffer;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.ofbiz.service.ServiceUtil;
import java.util.List;
public class Uploading
{
public static String uploadFile(HttpServletRequest request,HttpServletResponse response)
{
//ServletFileUpload fu = new ServletFileUpload(new DiskFileItemFactory(10240, new File(new File("runtime"), "tmp"))); //Creation of servletfileupload
System.out.println("\n\n\t****************************************\n\tuploadFile(HttpServletRequest request,HttpServletResponse response) - start\n\t");
ServletFileUpload fu = new ServletFileUpload(new DiskFileItemFactory()); //Creation of servletfileupload
java.util.List lst = null;
String result="AttachementException";
try
{
lst = fu.parseRequest(request);
}
catch (FileUploadException fup_ex)
{
System.out.println("\n\n\t****************************************\n\tException of FileUploadException \n\t");
fup_ex.printStackTrace();
result="AttachementException";
return(result);
}
if(lst.size()==0) //There is no item in lst
{
System.out.println("\n\n\t****************************************\n\tLst count is 0 \n\t");
result="AttachementException";
return(result);
}
FileItem file_item = null;
FileItem selected_file_item=null;
//Checking for form fields - Start
for (int i=0; i < lst.size(); i++)
{
file_item=(FileItem)lst.get(i);
String fieldName = file_item.getFieldName();
//Check for the attributes for user selected file - Start
if(fieldName.equals("filename"))
{
selected_file_item=file_item;
break;
}
//Check for the attributes for user selected file - End
}
//Checking for form fields - End
//Uploading the file content - Start
if(selected_file_item==null) //If selected file item is null
{
System.out.println("\n\n\t****************************************\n\tThe selected file item is null\n\t");
result="AttachementException";
return(result);
}
byte[] file_bytes=selected_file_item.get();
ByteBuffer byteWrap=ByteBuffer.wrap(file_bytes);
byte[] extract_bytes=null;
byteWrap.get(extract_bytes);
System.out.println("\n\n\t****************************************\n\tExtract succeeded :content are : \n\t");
if(extract_bytes==null)
{
System.out.println("\n\n\t****************************************\n\tExtract bytes is null\n\t");
result="AttachementException";
return(result);
}
for(int k=0;k<extract_bytes.length;k++)
System.out.print((char)extract_bytes[k]);
System.out.println("\n\n\t****************************************\n\tuploadFile(HttpServletRequest request,HttpServletResponse response) - end\n\t");
return("AttachementSuccess");
//Uploading the file content - End
}
}
我想使用“标签将文件上传到服务器。当我执行应用程序时，浏览器中会显示以下错误。
以下是控制台中的stackTrace打印
[java] 2010-12-29 10:56:38,336 (http-0.0.0.0-443-1) [ JavaEventHandler.ja
va:100:ERROR]
[java] ---- runtime exception report --------------------------------------
------------
[java] Problems Processing Event
[java] Exception: java.lang.NullPointerException
[java] Message: null
[java] ---- stack trace ---------------------------------------------------
------------
[java] java.lang.NullPointerException
[java] java.nio.ByteBuffer.get(ByteBuffer.java:675)
[java] org.ofbiz.productionmgntSystem.web_app_req.Uploading.uploadFile(Uplo
ading.java:76)
[java] sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl
.java:39)
[java] sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce
ssorImpl.java:25)
[java] java.lang.reflect.Method.invoke(Method.java:597)
[java] org.ofbiz.webapp.event.JavaEventHandler.invoke(JavaEventHandler.java
:92)
[java] org.ofbiz.webapp.event.JavaEventHandler.invoke(JavaEventHandler.java
:78)
[java] org.ofbiz.webapp.control.RequestHandler.runEvent(RequestHandler.java
:592)
[java] org.ofbiz.webapp.control.RequestHandler.doRequest(RequestHandler.jav
a:361)
[java] org.ofbiz.webapp.control.ControlServlet.doGet(ControlServlet.java:20
2)
[java] org.ofbiz.webapp.control.ControlServlet.doPost(ControlServlet.java:7
8)
[java] javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
[java] javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
[java] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(App
licationFilterChain.java:290)
[java] org.apache.catalina.core.ApplicationFilterChain.doFilter(Application
FilterChain.java:206)
[java] org.ofbiz.webapp.control.ContextFilter.doFilter(ContextFilter.java:2
59)
[java] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(App
licationFilterChain.java:235)
[java] org.apache.catalina.core.ApplicationFilterChain.doFilter(Application
FilterChain.java:206)
[java] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapper
Valve.java:233)
[java] org.apache.catalina.core.StandardContextValve.invoke(StandardContext
Valve.java:175)
[java] org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.
java:128)
[java] org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.
java:102)
[java] org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVa
lve.java:109)
[java] org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java
:568)
[java] org.ofbiz.catalina.container.CrossSubdomainSessionValve.invoke(Cross
SubdomainSessionValve.java:62)
[java] org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.ja
va:286)
[java] org.apache.coyote.http11.Http11Processor.process(Http11Processor.jav
a:844)
[java] org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proc
ess(Http11Protocol.java:583)
[java] org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:4
47)
[java] java.lang.Thread.run(Thread.java:619)
[java] --------------------------------------------------------------------
------------
[java]
[java] 2010-12-29 10:56:38,336 (http-0.0.0.0-443-1) [ ControlServlet.ja
va:205:ERROR]
[java] ---- exception report ----------------------------------------------
------------
[java] Error in request handler:
[java] Exception: org.ofbiz.webapp.event.EventHandlerException
[java] Message: Problems processing event: java.lang.NullPointerException (
null)
[java] ---- cause ---------------------------------------------------------
------------
[java] Exception: java.lang.NullPointerException
[java] Message: null
[java] ---- stack trace ---------------------------------------------------
------------
[java] java.lang.NullPointerException
[java] java.nio.ByteBuffer.get(ByteBuffer.java:675)
[java] org.ofbiz.productionmgntSystem.web_app_req.Uploading.uploadFile(Uplo
ading.java:76)
[java] sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl
.java:39)
[java] sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce
ssorImpl.java:25)
[java] java.lang.reflect.Method.invoke(Method.java:597)
[java] org.ofbiz.webapp.event.JavaEventHandler.invoke(JavaEventHandler.java
:92)
[java] org.ofbiz.webapp.event.JavaEventHandler.invoke(JavaEventHandler.java
:78)
[java] org.ofbiz.webapp.control.RequestHandler.runEvent(RequestHandler.java
:592)
[java] org.ofbiz.webapp.control.RequestHandler.doRequest(RequestHandler.jav
a:361)
[java] org.ofbiz.webapp.control.ControlServlet.doGet(ControlServlet.java:20
2)
[java] org.ofbiz.webapp.control.ControlServlet.doPost(ControlServlet.java:7
8)
[java] javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
[java] javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
[java] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(App
licationFilterChain.java:290)
[java] org.apache.catalina.core.ApplicationFilterChain.doFilter(Application
FilterChain.java:206)
[java] org.ofbiz.webapp.control.ContextFilter.doFilter(ContextFilter.java:2
59)
[java] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(App
licationFilterChain.java:235)
[java] org.apache.catalina.core.ApplicationFilterChain.doFilter(Application
FilterChain.java:206)
[java] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapper
Valve.java:233)
[java] org.apache.catalina.core.StandardContextValve.invoke(StandardContext
Valve.java:175)
[java] org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.
java:128)
[java] org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.
java:102)
[java] org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVa
lve.java:109)
[java] org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java
:568)
[java] org.ofbiz.catalina.container.CrossSubdomainSessionValve.invoke(Cross
SubdomainSessionValve.java:62)
[java] org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.ja
va:286)
[java] org.apache.coyote.http11.Http11Processor.process(Http11Processor.jav
a:844)
[java] org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proc
ess(Http11Protocol.java:583)
[java] org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:4
47)
[java] java.lang.Thread.run(Thread.java:619)
[java] --------------------------------------------------------------------
------------
[java]
[java] 2010-12-29 10:56:38,336 (http-0.0.0.0-443-1) [ ControlServlet.ja
va:221:ERROR] An error occurred, going to the errorPage: /error/error.jsp
[java] 2010-12-29 10:56:38,351 (http-0.0.0.0-443-1) [ ControlServlet.ja
va:228:ERROR] Including errorPage: /error/error.jsp
[java] 2010-12-29 10:56:38,367 (http-0.0.0.0-443-1) [ ControlServlet.ja
va:302:INFO ] [[[uploadAttachFile] Request Done- total:0.063,since last([uploadA
ttachFile...):0.063]]
我无法解决这个问题。所以请帮我解决这个问题。
谢谢和问候， Sivakumar.J