Question

我正在开发一个linux系统中的测试自动化工具。我没有对位于服务器上的tomcat目录的写权限。我需要开发一个应用程序，我们可以选择一个excel文件，以便excel内容自动存储在现有的表中。

对于这个目的，我写了一个表单来选择一个文件，它发布到一个servlet CommonsFileUploadServlet，我在那里存储上传的文件，然后调用ReadExcelFile类，它读取文件路径并为文件中的数据创建一个向量在数据库中存储数据。

我的问题是我无法将上传的文件存储在目录中。是否有必要拥有tomcat的权限才能执行此操作。我可以将文件存储在我的系统上并将路径传递给ReadExcelFile.class

请指导我

我的代码如下：

jsp中的表单

CommonsFileUploadServlet类代码：

public void init(ServletConfig config) throws ServletException {
    super.init(config);

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    PrintWriter out = response.getWriter();
    response.setContentType("text/plain");
    out.println("<h1>Servlet File Upload Example using Commons File Upload</h1>");
    DiskFileItemFactory  fileItemFactory = new DiskFileItemFactory ();
    fileItemFactory.setSizeThreshold(1*1024*1024);
    fileItemFactory.setRepository(new File("/home/example/Documents/Project/WEB-INF/tmp"));
    ServletFileUpload uploadHandler = new ServletFileUpload(fileItemFactory);
    try {
        List items = uploadHandler.parseRequest(request);
        Iterator itr = items.iterator();
        while(itr.hasNext()) {
            FileItem item = (FileItem) itr.next();
            if(item.isFormField()) {
            out.println("File Name = "+item.getFieldName()+", Value = "+item.getString());
            } else {
                out.println("Field Name = "+item.getFieldName()+
                    ", File Name = "+item.getName()+
                    ", Content type = "+item.getContentType()+
                    ", File Size = "+item.getSize());
            File file = new File("/",item.getName());
                   String realPath = getServletContext().getRealPath("/")+"/"+item.getName();   
                item.write(file);
        ReadExcelFile ref= new ReadExcelFile();
            String res=ref.insertReq(realPath,"1");
            }

            out.close();
        }
    }catch(FileUploadException ex) {
        log("Error encountered while parsing the request",ex);
    } catch(Exception ex) {
        log("Error encountered while uploading file",ex);
    }

} }

ReadExcelFile代码：

public static String insertReq（String fileName，String sno）{

    //Read an Excel File and Store in a Vector

   Vector dataHolder=readExcelFile(fileName,sno);

//store the data to database
   storeCellDataToDatabase(dataHolder);

}
public static Vector readExcelFile(String fileName,String Sno)
{
    /** --Define a Vector
        --Holds Vectors Of Cells
     */
    Vector cellVectorHolder = new Vector();
        try{
    /** Creating Input Stream**/
    //InputStream myInput= ReadExcelFile.class.getResourceAsStream( fileName );
    FileInputStream myInput = new FileInputStream(fileName);

    /** Create a POIFSFileSystem object**/
    POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);

    /** Create a workbook using the File System**/
     HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
int s=Integer.valueOf(Sno);
     /** Get the first sheet from workbook**/
    HSSFSheet mySheet = myWorkBook.getSheetAt(s);

    /** We now need something to iterate through the cells.**/
      Iterator rowIter = mySheet.rowIterator();

      while(rowIter.hasNext())
{
          HSSFRow myRow = (HSSFRow) rowIter.next();
          Iterator cellIter = myRow.cellIterator();
          Vector cellStoreVector=new Vector();
          short minColIndex = myRow.getFirstCellNum();
    short maxColIndex = myRow.getLastCellNum();
    for(short colIndex = minColIndex; colIndex < maxColIndex; colIndex++)
 {
 HSSFCell myCell = myRow.getCell(colIndex);
if(myCell == null)
 {
    cellStoreVector.addElement(myCell);
}
else 
{
cellStoreVector.addElement(myCell);
}
}
             cellVectorHolder.addElement(cellStoreVector);
    }
    }catch (Exception e){e.printStackTrace(); }
    return cellVectorHolder;
}

private static void storeCellDataToDatabase（Vector dataHolder） {

    Connection conn;
    Statement stmt;
    String query;

    try
    {
        // get connection and declare statement
        int z;
          for (int i=1;i<dataHolder.size(); i++)
          {
                z=0;
              Vector cellStoreVector=(Vector)dataHolder.elementAt(i);
              String []stringCellValue=new String[10];
       for (int j=0; j < cellStoreVector.size();j++,z++)
       {
           HSSFCell myCell = (HSSFCell)cellStoreVector.elementAt(j);
          if(myCell==null)
    stringCellValue[z]=" ";
    else
    stringCellValue[z] = myCell.toString();
        }

    try
        {
            //inserting into database
        }
        catch(Exception error)
        {
            String e="Error"+error;
            System.out.println(e);
        }
          }
        stmt.close();
        conn.close();

        System.out.println("success");
    }
    catch(Exception error)
    {
        String e="Error"+error;
        System.out.println(e);
    }

}

Answer 1

POI很乐意从旧的InputStream打开，它不一定是文件。

我建议您查看Commons FileUpload Streaming API并考虑将excel部分直接传递给POI而不触及磁盘

使用apache文件上传excel文件上传

1 个答案: