Apache POI autoColumnWidth java.lang.OutOfMemoryError：超出GC开销限制

Question

Am getting the OutOfMemoryError when the autoColumnWidth function is called on all the columns in my excel containing 1,28,237 rows and 20 columns. Am using SXSSF api and allocating -Xms2048m -Xmx4096m -XX:PermSize=1024m -XX:MaxPermSize=2048m to JVM but still no success. CPU utilization goes upto 100% , my system RAM is 6gb which is used upto 5.8gb during the process and then i get OutOfMemoryError . Any solution to it ?

With this, I can think of one solution ie taking a variable for each column, finding the max length and in the end after all data is entered set the column to respective variable.

Any other solution?

My Code To Create Excel

public static void createVideodataExcelFile(String excelPath, int maxRiskArea){

    FileOutputStream fileOut = null;
    XSSFWorkbook workbook = new XSSFWorkbook();

    CellStyle style = workbook.createCellStyle();
    XSSFFont font = workbook.createFont();
    font.setColor(HSSFColor.BLACK.index);
    font.setBold(true);
    style.setFont(font);
    int cellCount = 0;

    try {
        File file = new File(excelPath);

        if(file.createNewFile()){
            SXSSFWorkbook wb = new SXSSFWorkbook(workbook); 
            wb.setCompressTempFiles(true);
            Sheet sheet = wb.createSheet("GLE Video Data");
            int rowCount = sheet.getPhysicalNumberOfRows();
            //System.out.println("Row Count ="+rowCount);
            Row row = sheet.createRow(rowCount);

            Cell cell1 = row.createCell(cellCount);
            createCell(cell1, row, "CourseContent name", style, cellCount);
            createCell(cell1, row, "lang", style, ++cellCount);
            createCell(cell1, row, "CourseTitle", style, ++cellCount);
            createCell(cell1, row, "Audience", style, ++cellCount);
            createCell(cell1, row, "ContentRegion", style, ++cellCount);
            createCell(cell1, row, "CourseTitle", style, ++cellCount);
            createCell(cell1, row, "DeprecatedId", style, ++cellCount);
            createCell(cell1, row, "GleCode", style, ++cellCount);
            createCell(cell1, row, "Guid", style, ++cellCount);
            createCell(cell1, row, "LearningFormat", style, ++cellCount);

            for(int i = 0 ; i < maxRiskArea ; ++i){
                createCell(cell1, row, "RiskArea", style, ++cellCount);
            }

            createCell(cell1, row, "SalesforceId", style, ++cellCount);
            createCell(cell1, row, "Setting", style, ++cellCount);
            createCell(cell1, row, "SmsCode", style, ++cellCount);
            createCell(cell1, row, "pageID", style, ++cellCount);
            createCell(cell1, row, "title", style, ++cellCount);
            createCell(cell1, row, "ID", style, ++cellCount);
            createCell(cell1, row, "media_src", style, ++cellCount);
            createCell(cell1, row, "cuePoint", style, ++cellCount);
            createCell(cell1, row, "character", style, ++cellCount);
            createCell(cell1, row, "line", style, ++cellCount);

            fileOut = new FileOutputStream(excelPath);
            wb.write(fileOut);
            System.out.println("Excel Of GLE Data Created.");
        }


    } catch (IOException e) {
        errorLog.error("Excel Read/Write Error ="+e.getMessage());
        throw new GLEException(e);
    }
    finally{
        try {
            if(fileOut!=null)
            fileOut.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            errorLog.error("Excel Read/Write Error ="+e.getMessage());
            throw new GLEException(e);      

        }
    }
}

private static void createCell(Cell cell , Row row, String name, CellStyle style, int cellCount ){
    cell = row.createCell(cellCount);
    cell.setCellStyle(style);
    cell.setCellValue(name);
}

Answer 1

尝试在调用 autoSizeColumn(columnIndex) 之前在 SXSSFSheet 对象上调用 trackAllColumnsForAutoSizing() 它将被修复