apachepoi(org.apache.poi 3.8) 可以支持公式、日期等格式!
不说废话,上代码:
/** * Jun 25, 2012 */ import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import org.apache.commons.io.FilenameUtils; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellValue; import org.apache.poi.ss.usermodel.FormulaEvaluator; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; /** * Excel组件 * * @author Snowolf * @version 1.0 * @since 1.0 */ public abstract class ExcelHelper { /** * Excel 2003 */ private final static String XLS = "xls"; /** * Excel 2007 */ private final static String XLSX = "xlsx"; /** * 分隔符 */ private final static String SEPARATOR = "|"; /** * 由Excel文件的Sheet导出至List * * @param file * @param sheetNum * @return */ public static List<String> exportListFromExcel(File file, int sheetNum) throws IOException { return exportListFromExcel(new FileInputStream(file), FilenameUtils.getExtension(file.getName()), sheetNum); } /** * 由Excel流的Sheet导出至List * * @param is * @param extensionName * @param sheetNum * @return * @throws IOException */ public static List<String> exportListFromExcel(InputStream is, String extensionName, int sheetNum) throws IOException { Workbook workbook = null; if (extensionName.toLowerCase().equals(XLS)) { workbook = new HSSFWorkbook(is); } else if (extensionName.toLowerCase().equals(XLSX)) { workbook = new XSSFWorkbook(is); } return exportListFromExcel(workbook, sheetNum); } /** * 由指定的Sheet导出至List * * @param workbook * @param sheetNum * @return * @throws IOException */ private static List<String> exportListFromExcel(Workbook workbook, int sheetNum) { Sheet sheet = workbook.getSheetAt(sheetNum); // 解析公式结果 FormulaEvaluator evaluator = workbook.getCreationHelper() .createFormulaEvaluator(); List<String> list = new ArrayList<String>(); int minRowIx = sheet.getFirstRowNum(); int maxRowIx = sheet.getLastRowNum(); for (int rowIx = minRowIx; rowIx <= maxRowIx; rowIx++) { Row row = sheet.getRow(rowIx); StringBuilder sb = new StringBuilder(); short minColIx = row.getFirstCellNum(); short maxColIx = row.getLastCellNum(); for (short colIx = minColIx; colIx <= maxColIx; colIx++) { Cell cell = row.getCell(new Integer(colIx)); CellValue cellValue = evaluator.evaluate(cell); if (cellValue == null) { continue; } // 经过公式解析,最后只存在Boolean、Numeric和String三种数据类型,此外就是Error了 // 其余数据类型,根据官方文档,完全可以忽略http://poi.apache.org/spreadsheet/eval.html switch (cellValue.getCellType()) { case Cell.CELL_TYPE_BOOLEAN: sb.append(SEPARATOR + cellValue.getBooleanValue()); break; case Cell.CELL_TYPE_NUMERIC: // 这里的日期类型会被转换为数字类型,需要判别后区分处理 if (DateUtil.isCellDateFormatted(cell)) { sb.append(SEPARATOR + cell.getDateCellValue()); } else { sb.append(SEPARATOR + cellValue.getNumberValue()); } break; case Cell.CELL_TYPE_STRING: sb.append(SEPARATOR + cellValue.getStringValue()); break; case Cell.CELL_TYPE_FORMULA: break; case Cell.CELL_TYPE_BLANK: break; case Cell.CELL_TYPE_ERROR: break; default: break; } } list.add(sb.toString()); } return list; } }
由于Excel中的数据有日期、公式等等格式,参考 http://poi.apache.org/spreadsheet/eval.html做了修改,完全兼容。
当前的Excel,C列是根据A、B相乘计算而来,D列是日期格式:
测试下:
/** * Jun 25, 2012 */ import java.io.File; import java.io.IOException; import java.util.List; import static org.junit.Assert.*; import org.junit.Test; /** * * @author Snowolf * @version 1.0 * @since 1.0 */ public class ExcelHelperTest { @Test public void test() { String path = "excel.xlsx"; List<String> list = null; try { list = ExcelHelper.exportListFromExcel(new File(path), 0); assertNotNull(list); } catch (IOException e) { fail(); } } }
就是这样了
详见附件!
存档于此,备查~~