sorry abt that
Its throwing exception at this line
FileInputStream fin = (FileInputStream) in;
I tried new FileInputStream(in) - But this is not a valid constructor - not
defined in API
Is there anyother way in struts where u get FileInputStream directly from
the ActionForm
-Thank you
Laurie Harper wrote:
>
> You didn't specify which line in the code you posted is throwing the
> exception, but I would guess it's this:
>
> InputStream in = (InputStream) formFile.getInputStream();
> FileInputStream fin = (FileInputStream) in;
>
> It's never wise to down-cast a value from an interface type to a
> concrete type like this. The API contract is to return you an
> InputStream; it doesn't have to be any particular type of InputStream.
>
> To do this safely, use the following code instead:
>
> InputStream in = (InputStream) formFile.getInputStream();
> FileInputStream fin = new (FileInputStream(in);
>
> L.
>
> Kirthi wrote:
>> I am having problems with the FileUpload in struts.
>>
>> I am uploading an Excel File through browser and sending to Struts Action
>> Class, handling it with FormFile. I am casting this FormFile to
>> FileInputStream which is working fine.
>>
>> But when I am deleting some of the rows in that excel file and uploading
>> it
>> again its giving me a ClassCastException when converting the Form File to
>> FileInputStream.
>>
>> I have no idea y its happening like this. Can any one help me with this?
>>
>> Thanks
>>
>> Here is the error I am getting
>>
>> root cause
>>
>> java.lang.ClassCastException
>> at rcsa.struts.ExcelFileUpload.execute(ExcelFileUpload.java:48)
>> at
>> org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
>> at
>> org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
>> at
>> org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
>> at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:198)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
>> at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
>> at
>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
>> at
>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
>>
>> ******************************************************************************************
>>
>> Here is the code
>>
>> import java.io.*;
>>
>> import javax.servlet.ServletException;
>> import javax.servlet.http.*;
>>
>> import org.apache.struts.upload.FormFile;
>> import org.apache.struts.action.*;
>>
>> import rcsa.poi.RcsaPOIEventListner;
>> import rcsa.exceptions.RcsaException;
>> import rcsa.dao.OpRiskSSheet;
>> import rcsa.misc.ErrorHandler;
>>
>> public class ExcelFileUpload extends Action {
>>
>> // --------------------------------------------------------- Instance
>> Variables
>> String target;
>>
>> // --------------------------------------------------------- Methods
>>
>> /**
>> * Method execute
>> * @param mapping
>> * @param form
>> * @param request
>> * @param response
>> * @return ActionForward
>> */
>> public ActionForward execute(
>> ActionMapping mapping,
>> ActionForm form,
>> HttpServletRequest request,
>> HttpServletResponse response) throws IOException,
>> ServletException,
>> RcsaException{
>>
>> ActionMessages errors = new ActionMessages();
>> if(form != null){
>> ExcelFileUploadForm excelForm = (ExcelFileUploadForm)
>> form;
>> FormFile formFile = excelForm.getExcelFile();
>> InputStream in = (InputStream)
>> formFile.getInputStream();
>> FileInputStream fin = (FileInputStream) in;
>> errors.clear();
>> RcsaPOIEventListner.readExcelStream(fin);
>> //errors = new ErrorHandler(opSheet,
>> errors).checkErrors();
>> if(errors.isEmpty()){
>> target = "success";
>> }else{
>> target = "failure";
>> }
>> }else{
>> errors.add(ActionMessages.GLOBAL_MESSAGE,
>> new ActionMessage("UNABLE TO LOCATE THE
>> EXCEL FILE", false));
>> target = "failure";
>> }
>> saveErrors(request, errors);
>> return mapping.findForward(target);
>>
>> }
>>
>> }
>>
>>
>> **********************************************************************
>>
>> import org.apache.struts.validator.ValidatorForm;
>> import org.apache.struts.upload.FormFile;
>>
>> /**
>> [EMAIL PROTECTED]
>> *
>> */
>>
>> /**
>> *Form bean for File Upload.
>> *
>> */
>> public class ExcelFileUploadForm extends ValidatorForm{
>>
>> private FormFile excelFile;
>>
>> /**
>> * @return Returns the theFile.
>> */
>> public FormFile getExcelFile() {
>> return excelFile;
>> }
>>
>> /**
>> * @param theFile The FormFile to set.
>> */
>> public void setExcelFile(FormFile excelFile) {
>> this.excelFile = excelFile;
>> }
>>
>> }
>>
>>
>
>
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