Java tutorial
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See the License for the specific language governing permissions and limitations under the License. ==================================================================== */ package ReadExcel; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.ss.usermodel.BorderStyle; import org.apache.poi.ss.util.CellRangeAddress; 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; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import static Print.Print.println; /** * File for HSSF testing/examples * * THIS IS NOT THE MAIN HSSF FILE!! This is a utility for testing functionality. * It does contain sample API usage that may be educational to regular API * users. */ public final class HSSFReadWrite { /** * creates an {@link HSSFWorkbook} the specified OS filename. */ private static HSSFWorkbook readxlsFile(String filename) throws IOException { FileInputStream fis = new FileInputStream(filename); try { return new HSSFWorkbook(fis); } finally { fis.close(); } } private static XSSFWorkbook readxlsxFile(String filename) throws IOException { FileInputStream fis = new FileInputStream(filename); try { return new XSSFWorkbook(fis); } finally { fis.close(); } } /** * given a filename this outputs a sample sheet with just a set of * rows/cells. */ private static void testCreateSampleSheet(String outputFilename) throws IOException { int rownum; HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet s = wb.createSheet(); HSSFCellStyle cs = wb.createCellStyle(); HSSFCellStyle cs2 = wb.createCellStyle(); HSSFCellStyle cs3 = wb.createCellStyle(); HSSFFont f = wb.createFont(); HSSFFont f2 = wb.createFont(); f.setFontHeightInPoints((short) 12); f.setColor((short) 0xA); f.setBold(true); f2.setFontHeightInPoints((short) 10); f2.setColor((short) 0xf); f2.setBold(true); cs.setFont(f); cs.setDataFormat(HSSFDataFormat.getBuiltinFormat("($#,##0_);[Red]($#,##0)")); cs2.setBorderBottom(BorderStyle.THIN); cs2.setFillPattern((short) 1); // fill w fg cs2.setFillForegroundColor((short) 0xA); cs2.setFont(f2); wb.setSheetName(0, "HSSF Test"); for (rownum = 0; rownum < 300; rownum++) { HSSFRow r = s.createRow(rownum); if ((rownum % 2) == 0) { r.setHeight((short) 0x249); } for (int cellnum = 0; cellnum < 50; cellnum += 2) { HSSFCell c = r.createCell(cellnum); c.setCellValue(rownum * 10000 + cellnum + (((double) rownum / 1000) + ((double) cellnum / 10000))); if ((rownum % 2) == 0) { c.setCellStyle(cs); } c = r.createCell(cellnum + 1); c.setCellValue(new HSSFRichTextString("TEST")); // 50 characters divided by 1/20th of a point s.setColumnWidth(cellnum + 1, (int) (50 * 8 / 0.05)); if ((rownum % 2) == 0) { c.setCellStyle(cs2); } } } // draw a thick black border on the row at the bottom using BLANKS rownum++; rownum++; HSSFRow r = s.createRow(rownum); cs3.setBorderBottom(BorderStyle.THICK); for (int cellnum = 0; cellnum < 50; cellnum++) { HSSFCell c = r.createCell(cellnum); c.setCellStyle(cs3); } s.addMergedRegion(new CellRangeAddress(0, 3, 0, 3)); s.addMergedRegion(new CellRangeAddress(100, 110, 100, 110)); // end draw thick black border // create a sheet, set its title then delete it wb.createSheet(); wb.setSheetName(1, "DeletedSheet"); wb.removeSheetAt(1); // end deleted sheet FileOutputStream out = new FileOutputStream(outputFilename); try { wb.write(out); } finally { out.close(); } wb.close(); } private static void startReadXlsFile(String fileName) { try { HSSFWorkbook wb = HSSFReadWrite.readxlsFile(fileName); System.out.println("Data dump:\n"); for (int k = 0; k < wb.getNumberOfSheets(); k++) { HSSFSheet sheet = wb.getSheetAt(k); int rows = sheet.getPhysicalNumberOfRows(); System.out.println("Sheet " + k + " \"" + wb.getSheetName(k) + "\" has " + rows + " row(s)."); for (int r = 0; r < rows; r++) { HSSFRow row = sheet.getRow(r); if (row == null) { continue; } int cells = row.getPhysicalNumberOfCells(); System.out.println("\nROW " + row.getRowNum() + " has " + cells + " cell(s)."); for (int c = 0; c < cells; c++) { HSSFCell cell = row.getCell(c); String value = null; switch (cell.getCellTypeEnum()) { case FORMULA: value = "FORMULA value=" + cell.getCellFormula(); break; case NUMERIC: value = "NUMERIC value=" + cell.getNumericCellValue(); break; case STRING: value = "STRING value=" + cell.getStringCellValue(); break; default: } System.out.println("CELL col=" + cell.getColumnIndex() + " VALUE=" + value); } } } wb.close(); } catch (Exception e) { e.printStackTrace(); } } private static void startReadXlsxFile(String fileName) { try { XSSFWorkbook wb = HSSFReadWrite.readxlsxFile(fileName); System.out.println("Data dump:\n"); for (int k = 0; k < wb.getNumberOfSheets(); k++) { XSSFSheet sheet = wb.getSheetAt(k); int rows = sheet.getPhysicalNumberOfRows(); System.out.println("Sheet " + k + " \"" + wb.getSheetName(k) + "\" has " + rows + " row(s)."); for (int r = 0; r < rows; r++) { XSSFRow row = sheet.getRow(r); if (row == null) { continue; } int cells = row.getPhysicalNumberOfCells(); System.out.println("\nROW " + row.getRowNum() + " has " + cells + " cell(s)."); for (int c = 0; c < cells; c++) { XSSFCell cell = row.getCell(c); String value = null; switch (cell.getCellTypeEnum()) { case FORMULA: value = "FORMULA value=" + cell.getCellFormula(); break; case NUMERIC: value = "NUMERIC value=" + cell.getNumericCellValue(); break; case STRING: value = "STRING value=" + cell.getStringCellValue(); break; default: } System.out.println("CELL col=" + cell.getColumnIndex() + " VALUE=" + value); } } } wb.close(); } catch (Exception e) { e.printStackTrace(); } } /** * xls0 * xlsx1 * ?-1 * @param fileName * @return */ private static int whichFile(String fileName) { int length = fileName.length(); int index = fileName.lastIndexOf("."); if (index != -1) { if (length - index == 4) return 0; if (length - index == 5) return 1; } return -1; } public void read(String fileName) { if (whichFile(fileName) == 0) { startReadXlsFile(fileName); } else if (whichFile(fileName) == 1) { startReadXlsxFile(fileName); } else try { throw new FileNotFoundException(""); } catch (FileNotFoundException e) { e.printStackTrace(); } } public static void main(String[] args) { String fileName = "src/ReadExcel/ano.xls"; //only can read xls file startReadXlsFile(fileName); String name = "src/ReadExcel/ABC?_13?.xlsx"; //only can read xlsx file startReadXlsxFile(name); String str = ".ano.xlsx"; if (whichFile(str) == 0) { println("xls"); } else if (whichFile(str) == 1) { println("xlsx"); } else println("all not"); } }