package com.xiang; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashMap; import java.util.Map; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFDateUtil; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.filesystem.POIFSFileSystem; /** * 操作Excel表格的功能类 */ public class ExcelReader { private POIFSFileSystem fs; private HSSFWorkbook wb; private HSSFSheet sheet; private HSSFRow row; /** * 读取Excel表格表头的内容 * * @param InputStream * @return String 表头内容的数组 */ public String[] readExcelTitle(InputStream is) { try { fs = new POIFSFileSystem(is); wb = new HSSFWorkbook(fs); } catch (IOException e) { e.printStackTrace(); } sheet = wb.getSheetAt(0); row = sheet.getRow(0); // 标题总列数 int colNum = row.getPhysicalNumberOfCells(); // System.out.println("colNum:" + colNum); String[] title = new String[colNum]; for (int i = 0; i < colNum; i++) { // title[i] = getStringCellValue(row.getCell((short) i)); title[i] = getCellFormatValue(row.getCell(i)); System.out.println("222" + row.getCell(i)); } return title; } /** * 读取Excel数据内容 * * @param InputStream * @return Map 包含单元格数据内容的Map对象 */ public Map<Integer, String> readExcelContent(InputStream is) { Map<Integer, String> content = new HashMap<Integer, String>(); String str = ""; try { fs = new POIFSFileSystem(is); wb = new HSSFWorkbook(fs); } catch (IOException e) { e.printStackTrace(); } sheet = wb.getSheetAt(0); // 得到总行数 int rowNum = sheet.getLastRowNum(); row = sheet.getRow(0); int colNum = row.getPhysicalNumberOfCells(); // 正文内容应该从第二行开始,第一行为表头的标题 for (int i = 1; i <= rowNum; i++) { row = sheet.getRow(i); int j = 0; while (j < colNum) { // 每个单元格的数据内容用"-"分割开,以后需要时用String类的replace()方法还原数据 // 也可以将每个单元格的数据设置到一个javabean的属性中,此时需要新建一个javabean // str += getStringCellValue(row.getCell((short) j)).trim() + // "-"; str += getCellFormatValue(row.getCell((short) j)).trim() + " "; j++; } content.put(i, str); str = ""; } return content; } /** * 获取单元格数据内容为字符串类型的数据 * * @param cell * Excel单元格 * @return String 单元格数据内容 */ private String getStringCellValue(HSSFCell cell) { String strCell = ""; switch (cell.getCellType()) { case HSSFCell.CELL_TYPE_STRING: strCell = cell.getStringCellValue(); break; case HSSFCell.CELL_TYPE_NUMERIC: strCell = String.valueOf(cell.getNumericCellValue()); break; case HSSFCell.CELL_TYPE_BOOLEAN: strCell = String.valueOf(cell.getBooleanCellValue()); break; case HSSFCell.CELL_TYPE_BLANK: strCell = ""; break; default: strCell = ""; break; } if (strCell.equals("") || strCell == null) { return ""; } if (cell == null) { return ""; } return strCell; } /** * 获取单元格数据内容为日期类型的数据 * * @param cell * Excel单元格 * @return String 单元格数据内容 */ private String getDateCellValue(HSSFCell cell) { String result = ""; try { int cellType = cell.getCellType(); if (cellType == HSSFCell.CELL_TYPE_NUMERIC) { Date date = cell.getDateCellValue(); result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1) + "-" + date.getDate(); } else if (cellType == HSSFCell.CELL_TYPE_STRING) { String date = getStringCellValue(cell); result = date.replaceAll("[年月]", "-").replace("日", "").trim(); } else if (cellType == HSSFCell.CELL_TYPE_BLANK) { result = ""; } } catch (Exception e) { System.out.println("日期格式不正确!"); e.printStackTrace(); } return result; } /** * 根据HSSFCell类型设置数据 * * @param cell * @return */ private String getCellFormatValue(HSSFCell cell) { String cellvalue = ""; if (cell != null) { // 判断当前Cell的Type switch (cell.getCellType()) { // 如果当前Cell的Type为NUMERIC case HSSFCell.CELL_TYPE_NUMERIC: case HSSFCell.CELL_TYPE_FORMULA: { // 判断当前的cell是否为Date if (HSSFDateUtil.isCellDateFormatted(cell)) { // 如果是Date类型则,转化为Data格式 // 方法1:这样子的data格式是带时分秒的:2011-10-12 0:00:00 // cellvalue = cell.getDateCellValue().toLocaleString(); // 方法2:这样子的data格式是不带带时分秒的:2011-10-12 Date date = cell.getDateCellValue(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); cellvalue = sdf.format(date); } // 如果是纯数字 else { // 取得当前Cell的数值 cellvalue = String.valueOf(cell.getNumericCellValue()); } break; } // 如果当前Cell的Type为STRIN case HSSFCell.CELL_TYPE_STRING: // 取得当前的Cell字符串 cellvalue = cell.getRichStringCellValue().getString(); break; // 默认的Cell值 default: cellvalue = " "; } } else { cellvalue = ""; } return cellvalue; } public static void main(String[] args) { try { // 对读取Excel表格标题测试 InputStream is = new FileInputStream("d:\\test2.xls"); ExcelReader excelReader = new ExcelReader(); String[] title = excelReader.readExcelTitle(is); System.out.println("获得Excel表格的标题:"); for (String s : title) { System.out.print(s + " "); } System.out.println(); // 对读取Excel表格内容测试 InputStream is2 = new FileInputStream("d:\\test2.xls"); Map<Integer, String> map = excelReader.readExcelContent(is2); System.out.println("获得Excel表格的内容:"); for (int i = 1; i <= map.size(); i++) { System.out.println(map.get(i)); } } catch (FileNotFoundException e) { System.out.println("未找到指定路径的文件!"); e.printStackTrace(); } } }