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【Java】 Java读取Excel
作者:Dezai.CN / 发布于2013/10/18/ 590

	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Type
	 switch (cell.getCellType()) {
	 case Cell.CELL_TYPE_NUMERIC:// 如果当前Cell的Type为NUMERIC
	 case Cell.CELL_TYPE_FORMULA: {
	 // 判断当前的cell是否为Date
	 if (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：2013-7-10
	 Date 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();
	 }
	}
	}
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