java读取Excel的方法，解析xls、xlsx两种格式

import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.Date;import java.util.HashMap;import java.util.Map;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.DateUtil;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.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 读取Excel *  * @author zengwendong */public class ReadExcelUtils {private Logger logger = LoggerFactory.getLogger(ReadExcelUtils.class);private Workbook wb;private Sheet sheet;private Row row;public ReadExcelUtils(String filepath) {if(filepath==null){return;}String ext = filepath.substring(filepath.lastIndexOf("."));try {InputStream is = new FileInputStream(filepath);if(".xls".equals(ext)){wb = new HSSFWorkbook(is);}else if(".xlsx".equals(ext)){wb = new XSSFWorkbook(is);}else{wb=null;}} catch (FileNotFoundException e) {logger.error("FileNotFoundException", e);} catch (IOException e) {logger.error("IOException", e);}}/** * 读取Excel表格表头的内容 *  * @param InputStream * @return String 表头内容的数组 * @author zengwendong */public String[] readExcelTitle() throws Exception{if(wb==null){throw new Exception("Workbook对象为空！");}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] = row.getCell(i).getCellFormula();}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 * @author zengwendong */public Map<Integer, Map<Integer,Object>> readExcelContent() throws Exception{if(wb==null){throw new Exception("Workbook对象为空！");}Map<Integer, Map<Integer,Object>> content = new HashMap<Integer, Map<Integer,Object>>();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;Map<Integer,Object> cellValue = new HashMap<Integer, Object>();while (j < colNum) {Object obj = getCellFormatValue(row.getCell(j));cellValue.put(j, obj);j++;}content.put(i, cellValue);}return content;}/** *  * 根据Cell类型设置数据 *  * @param cell * @return * @author zengwendong */private Object getCellFormatValue(Cell cell) {Object cellvalue = "";if (cell != null) {// 判断当前Cell的Typeswitch (cell.getCellType()) {case Cell.CELL_TYPE_NUMERIC:// 如果当前Cell的Type为NUMERICcase Cell.CELL_TYPE_FORMULA: {// 判断当前的cell是否为Dateif (DateUtil.isCellDateFormatted(cell)) {// 如果是Date类型则，转化为Data格式// data格式是带时分秒的：2013-7-10 0:00:00// cellvalue = cell.getDateCellValue().toLocaleString();// data格式是不带带时分秒的：2013-7-10Date date = cell.getDateCellValue();cellvalue = date;} else {// 如果是纯数字// 取得当前Cell的数值cellvalue = String.valueOf(cell.getNumericCellValue());}break;}case Cell.CELL_TYPE_STRING:// 如果当前Cell的Type为STRING// 取得当前的Cell字符串cellvalue = cell.getRichStringCellValue().getString();break;default:// 默认的Cell值cellvalue = "";}} else {cellvalue = "";}return cellvalue;}public static void main(String[] args) {try {String filepath = "F:test.xls";ReadExcelUtils excelReader = new ReadExcelUtils(filepath);// 对读取Excel表格标题测试//String[] title = excelReader.readExcelTitle();//System.out.println("获得Excel表格的标题:");//for (String s : title) {//System.out.print(s + " ");//}// 对读取Excel表格内容测试Map<Integer, Map<Integer,Object>> map = excelReader.readExcelContent();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();}catch (Exception e) {e.printStackTrace();}}}