我已经从Jtable中读取了数据，并使用apache poi将日期写入了excel。
我的代码： 初始化工作表： 公共XlsxVisitorFactory（字符串标题）引发IOException {
tempFile = File.createTempFile("Test", ".xlsx");
tempFile.deleteOnExit();
wb = new SXSSFWorkbook();
out = new FileOutputStream(tempFile);
rowIndex = 0;
sh = wb.createSheet("Sheet 1");
if (title != null) {
Row row = sh.createRow(++rowIndex);
Cell cell = row.createCell(0);
cell.setCellValue(title);
}
createHeaderCellStyle();
createHyperLinkCellStyle();
createWrapTextCellStyle();
}
... 一旦数据添加到单元格中。
在页脚中，我编写了以下代码以打开文件。
wb.write(out);
out.close();
Desktop.getDesktop().open(tempFile);
请帮助。
公共类XlsxVisitorFactory实现TableVisitorFactory {
private File tempFile;
private FileOutputStream out;
private Workbook wb;
private Sheet sh;
private Row currentRow;
private int rowIndex;
private static Logger log = LoggerFactory.getLogger(XlsxVisitorFactory.class);
private CellStyle headerStyle;
private Font headerFont;
private XSSFCellStyle hyperlinkStyle;
private CellStyle wrapStyle;
public XlsxVisitorFactory() {
}
// Create a tempFile to use
public XlsxVisitorFactory(String title) throws IOException {
tempFile = File.createTempFile("Test", ".xlsx");
tempFile.deleteOnExit();
wb = new XSSFWorkbook();
out = new FileOutputStream(tempFile);
rowIndex = 0;
sh = wb.createSheet("Sheet 1");
if (title != null) {
Row row = sh.createRow(++rowIndex);
Cell cell = row.createCell(0);
cell.setCellValue(title);
}
}
private class TableGroupVisitor implements TableVisitor {
@Override
public void visit(String tableName, int columnCount) {
if (tableName != null) {
Row row = sh.createRow(++rowIndex);
Cell cell = row.createCell(0);
cell.setCellValue(tableName);
}
}
}
private class DocumentFooterVisitor implements NameVisitor {
@Override
public void visit(String name) {
try {
Row row = sh.createRow(++rowIndex);
Cell cell = row.createCell(0);
cell.setCellValue(name);
wb.write(out);
out.close();
//Desktop.getDesktop().open(tempFile);
//InputStream is = new FileInputStream(tempFile);
//StreamingReader.builder().rowCacheSize(100).bufferSize(4096).open(tempFile.g//etAbsoluteFile());
} catch (IOException e) {
throw new RuntimeException("Unable to start Excel: " + e.getMessage());
}
}
}
private class TableCellVisitor implements CellVisitor {
@Override
public void visit(String name, int index) {
if (index == 0) {
currentRow = sh.createRow(++rowIndex);
}
Cell cell = currentRow.createCell(index);
String nameNoHtml = name.toString().replaceAll("\\<.*?>", "");
cell.setCellStyle(wrapStyle);
if (isDouble(name)) {
cell.setCellValue(Double.parseDouble(nameNoHtml));
} else {
cell.setCellValue(nameNoHtml);
}
}
}
@Override
public void visitForColumnWidth(final int actualRowCount) {
for (int x = 0; x < actualRowCount; x++) {
sh.autoSizeColumn(x);
}
}
@Override
public void visitForColumnWidth(int actualRowCount) {
// TODO Auto-generated method stub
}
public XSSFSheet readFromExcel(File file) throws IOException {
FileInputStream ins = new FileInputStream(file);
// Create Workbook instance holding reference to .xlsx file
XSSFWorkbook workbook = new XSSFWorkbook(ins);
// Get first/desired sheet from the workbook
XSSFSheet sheet = workbook.getSheetAt(0);
ins.close();
return sheet;
}
public void setRowIndex(int rowIndex) {
this.rowIndex = rowIndex;
}
public TableVisitor createTablePageBreakVistor() {
// TODO add logic for page break
return null;
}
@Override
public boolean isPageBreakAllowed() {
return false;
}
}