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src/main/java/lingtao/net/util/ExcelUtils.java

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+package lingtao.net.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.math.BigDecimal;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.poi.hssf.usermodel.HSSFDateUtil;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.ss.usermodel.Cell;
+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;
+import org.apache.shiro.SecurityUtils;
+
+import lingtao.net.bean.SysUser;
+
+public class ExcelUtils {
+
+	private final static String excel2003L = ".xls"; // 2003- 版本的excel
+	private final static String excel2007U = ".xlsx"; // 2007+ 版本的excel
+
+	/**
+	 * 描述：获取IO流中的数据，组装成List<List<Object>>对象
+	 * 
+	 * @param in,fileName
+	 * @return
+	 * @throws IOException
+	 */
+	public List<List<Object>> getBankListByExcel(InputStream in, String fileName) throws Exception {
+		List<List<Object>> list = null;
+		SysUser user = (SysUser) SecurityUtils.getSubject().getPrincipal();
+		// 创建Excel工作薄
+		Workbook work = this.getWorkbook(in, fileName);
+		if (null == work) {
+			throw new Exception("创建Excel工作薄为空！");
+		}
+		Sheet sheet = null; // 页数
+		Row row = null; // 行数
+		Cell cell = null; // 列数
+
+		list = new ArrayList<List<Object>>();
+		// 遍历Excel中所有的sheet
+		for (int i = 0; i < work.getNumberOfSheets(); i++) {
+			sheet = work.getSheetAt(i);
+			if (sheet == null) {
+				continue;
+			}
+
+			// 遍历当前sheet中的所有行
+			for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
+				row = sheet.getRow(j);
+				if (user.getRole().contains("1050")) {
+					if (row == null || row.getFirstCellNum() == j) {
+						continue;
+					}
+				} else {
+					if (row == null) {// ||row.getFirstCellNum()==j 第一行不要
+						continue;
+					}
+				}
+
+				// 遍历所有的列
+				List<Object> li = new ArrayList<Object>();
+				for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
+					cell = row.getCell(y);
+					li.add(this.getValue(cell));
+				}
+				list.add(li);
+			}
+		}
+
+		return list;
+
+	}
+
+	/**
+	 * 描述：根据文件后缀，自适应上传文件的版本
+	 * 
+	 * @param inStr,fileName
+	 * @return
+	 * @throws Exception
+	 */
+	public Workbook getWorkbook(InputStream inStr, String fileName) throws Exception {
+		Workbook wb = null;
+		String fileType = fileName.substring(fileName.lastIndexOf("."));
+		if (excel2003L.equals(fileType)) {
+			wb = new HSSFWorkbook(inStr); // 2003-
+		} else if (excel2007U.equals(fileType)) {
+			wb = new XSSFWorkbook(inStr); // 2007+
+		} else {
+			throw new Exception("解析的文件格式有误！");
+		}
+		return wb;
+	}
+
+	/**
+	 * 描述：对表格中数值进行格式化
+	 * 
+	 * @param cell
+	 * @return
+	 */
+	// 解决excel类型问题，获得数值
+	public String getValue(Cell cell) {
+		String value = "";
+		if (null == cell) {
+			return value;
+		}
+		switch (cell.getCellType()) {
+		// 数值型
+		case Cell.CELL_TYPE_NUMERIC:
+			if (HSSFDateUtil.isCellDateFormatted(cell)) {
+				// 如果是date类型则 ，获取该cell的date值
+				Date date = HSSFDateUtil.getJavaDate(cell.getNumericCellValue());
+				SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
+				value = format.format(date);
+				;
+			} else {// 纯数字
+				BigDecimal big = new BigDecimal(cell.getNumericCellValue());
+				value = big.toString();
+				// 解决1234.0 去掉后面的.0
+				if (null != value && !"".equals(value.trim())) {
+					String[] item = value.split("[.]");
+					if (1 < item.length && "0".equals(item[1])) {
+						value = item[0];
+					}
+				}
+			}
+			break;
+		// 字符串类型
+		case Cell.CELL_TYPE_STRING:
+			value = cell.getStringCellValue().toString();
+			break;
+		// 公式类型
+		case Cell.CELL_TYPE_FORMULA:
+			// 读公式计算值
+			value = String.valueOf(cell.getNumericCellValue());
+			if (value.equals("NaN")) {// 如果获取的数据值为非法值,则转换为获取字符串
+				value = cell.getStringCellValue().toString();
+			}
+			break;
+		// 布尔类型
+		case Cell.CELL_TYPE_BOOLEAN:
+			value = " " + cell.getBooleanCellValue();
+			break;
+		default:
+			value = cell.getStringCellValue().toString();
+		}
+		if ("null".endsWith(value.trim())) {
+			value = "";
+		}
+		return value;
+	}
+
+}