xssf

问题 I have a large .xlsx file (141 MB, containing 293413 lines with 62 columns each) I need to perform some operations within. I am having problems with loading this file ( OutOfMemoryError ), as POI has a large memory footprint on XSSF (xlsx) workbooks. This SO question is similar, and the solution presented is to increase the VM's allocated/maximum memory. It seems to work for that kind of file-size (9MB), but for me, it just simply doesn't work even if a allocate all available system memory.

问题 SetCellType(HSSFCELL.CELL_TYPE_NUMERIC) is not working in apache poi. Anyone have used this feature of POI in JAVA? When I created XLS file using POI and cell contains integer value and I set cell type as numeric at that time that cell reflects some other integer value. Example: Using JAVA program and poi utility, I am putting in Cell A1 value "5" . Now this cell contains Integer value but by default cell type is CELL_TYPE_STRING . So this cell gives me error and asked me to convert this cell

问题 This is my code: import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.*; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class Reader { public static void read_excel() { File excel = new File ("C:\\Users\\Username\\Desktop\\java-Tools\\data.xlsx"); FileInputStream fis = new FileInputStream

问题 I need to find a way to interrupt the stream reader (reading XML and parsing it with SAX) after first line. Meaning after I read the column names. Any idea how to do that? CODE: XSSFSheetXMLHandler.SheetContentsHandler mySheetContentsHandler = new MySheetContentsHandler(true, xlsxHeaders); File myFile = new File(filePath); OPCPackage pkg = OPCPackage.open(myFile.getPath()); XSSFReader reader = new XSSFReader(pkg); StylesTable styles = reader.getStylesTable(); ReadOnlySharedStringsTable

问题 I am using Apache POI XSSF to read and write Excel Sheets. I know that I can set the active cell on a worksheet by using Sheet.setActiveCell(CellAddress address) . However, I'd like to set it to a Range containing more than one cell on the sheet, as illustrated by the picture below: When I save a sheet with multiple cells selected using Excel those are selected upon opening the saved file. Is there a way to do this with POI XSSF? 回答1: you can use following line to achieve a ranke as active

问题 I am Using poi version : 3.14 I access an Excel ( .xlsx ) file this.workbook = WorkbookFactory.create(new FileInputStream(f.getPath())); this.workbook.setMissingCellPolicy(Row.CREATE_NULL_AS_BLANK); this.sheet = workbook.getSheetAt(0); Here is a custom format found in .xlsx file applied to a cell. I want to display the cell value in my code. As you can see the cell value visible in file is "031642153283700100". Also when i clic on this particular cell, value is changing to "42153283700100"

问题 I am trying to make sure an XLSX sheet is at the top left when the file is open. The XSSFSheet has a getTopCol() and a getLeftCol() methods, but there is no setter. XSSFSheet.showInPane(int, int) does work, but only if pane is frozen or split. PaneInformation pane = sheet.getPaneInformation(); if (pane == null) { // FIXME doesn't work when there is no pane sheet.showInPane(CellAddress.A1.getRow(), CellAddress.A1.getColumn()); } else { // OK sheet.showInPane(pane.getHorizontalSplitPosition(),

问题 XSSFCell seems to encode certain character sequences as unicode characters. How can I prevent this? Do I need to apply some kind of character escaping? e.g. cell.setCellValue("LUS_BO_WP_x24B8_AI"); // The cell value now is „LUS_BO_WPⒸAI" In Unicode Ⓒ is U+24B8 I've already tried setting an ANSI font and setting the cell type to string. 回答1: This character conversion is done in XSSFRichTextString.utfDecode() I have now written a function that basicaly does the same thing in reverse. private

问题 I'm currently using the Apache POI library to generate excel files in Java. Here's what I'm wondering: In excel, it's possible to create new cell styles which will be added to the workbook. These styles are reusable and can be selected from the styles table. Using Apache POI, you can do something similar when constructing a workbook. You can create a new XSSFCellstyle, which is attached to the workbook, and can be applied to as many cells as you want. However, these styles are not reusable.

问题 Requirement I need a new XSSFCellStyle because I have to change some stylings. Situation I only have a XSSFCellStyle - I don't have the XSSFCell it belongs to. Thus I also don't have access to the related XSSFSheet or XSSFWorkbook . What I already tried I don't have the XSSFWorkbook therefore I can't call workbook.createCellStyle() . The XSSFCellStyle constructor needs at least a StylesTable which I also don't have (because I couldn't find a way to get it from the old XSSFCellStyle ). The