文件上傳問題JSP

我要上傳文件，而IAM試圖運行顯示消息文件上傳問題JSP

org.apache.jasper.JasperException: Exception in JSP: /RootSipResource.jsp:33 

30:  out.println("Cookies" + request.getCookies()); 
31:   
32:  DiskFileUpload upload=new DiskFileUpload(); 
33:  List items=upload.parseRequest(request); 
34:   Iterator it=items.iterator(); 
35:  while(it.hasNext()) 
36:    {   


Stacktrace: 
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
    org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) 

root cause 

javax.servlet.ServletException: the request doesn't contain a multipart/form-data or multipart/mixed stream, content type header is null 
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858) 
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791) 
    org.apache.jsp.RootSipResource_jsp._jspService(RootSipResource_jsp.java:577) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
    org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) 

root cause 

org.apache.commons.fileupload.FileUploadBase$InvalidContentTypeException: the request doesn't contain a multipart/form-data or multipart/mixed stream, content type header is null 
    org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:768) 
    org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:323) 
    org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:341) 
    org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:302) 
    org.apache.jsp.RootSipResource_jsp._jspService(RootSipResource_jsp.java:91)

在JSP頁面的表單字段設置爲

<form name="frm" id="frmLoad" method="post" enctype="multipart/form-data">

isMultipart被打印成真（boolean isMultipart = FileUpload.isMultipartContent(request);)

 `out.println("Content Type ="+request.getContentType());` is printed as null

來源

2011-12-07 chinchu

我想你錯過了action屬性。

你能解釋一下嗎？ – chinchu

你是指表單動作？ – chinchu

此異常指示任一method="post"或元素中缺少。但是，由於他們顯然存在，其原因在於別處。也許你在嵌套表單，或者誤解結果，或者沒有運行你認爲正在運行的代碼。

無論如何，應該避免在JSP文件中編寫Java代碼。使用一個servlet。你可以在這個答案中找到具體的例子：How to upload files to server using JSP/Servlet?

來源

2011-12-07 12:46:56 BalusC

文件上傳問題JSP

回答

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