Apache POI解析excel文件

这里需要用到poi.jar和poi-ooxml.jar  没有的可以去http://mvnrepository.com/下载

 import org.apache.poi.POIXMLDocument;
 import org.apache.poi.hssf.usermodel.HSSFDateUtil;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
 import org.apache.poi.openxml4j.opc.OPCPackage;
 import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 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 java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.PushbackInputStream;
 import java.text.SimpleDateFormat;
 import java.util.*;

 /**
  * Created by Donge on 2017/1/3.
  */
 public class ReadExcel {

     static private Workbook wb;
     static private Sheet sheet;
     static private Row row;

     /**
      * 读取 Excel 标题
      * @param fileName
      * @return
      */
     public static String[] readExcelTitle(String fileName) {
         try {
             wb = createWorkbook(new FileInputStream(fileName));
         } catch (IOException e) {
             e.printStackTrace();
         } catch (InvalidFormatException e) {
             e.printStackTrace();
         }
         sheet = wb.getSheetAt(0);
         row = sheet.getRow(0);// 获取第一行（约定第一行是标题行）
         int colNum = row.getLastCellNum();// 获取行的列数
         String[] titles = new String[colNum];
         for (int i = 0; i < titles.length; i++) {
             titles[i] = getCellFormatValue(row.getCell(i));
         }
         return titles;
     }

     /**
      * 读取 Excel 内容
      * @param fileName
      * @return
      */
     public static List<Map<String, String>> readExcelContent(String fileName) {
         List<Map<String, String>> list = new ArrayList<>();
         Map<String, String> content;
         try {
             wb = createWorkbook(new FileInputStream(fileName));
         } catch (IOException e) {
             e.printStackTrace();
         } catch (InvalidFormatException e) {
             e.printStackTrace();
         }
         sheet = wb.getSheetAt(0);
         int rowNum = sheet.getLastRowNum()+1;// 得到总行数
         row = sheet.getRow(0);
         int colNum = row.getLastCellNum();// 得到总列数
         String titles[] = readExcelTitle(fileName);
         // 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++) {
             int j = 0;
             row = sheet.getRow(i);
             content = new LinkedHashMap<>();
             do {
                 content.put(titles[j], getCellFormatValue(row.getCell(j)).trim());
                 j++;
             } while (j < colNum);
             list.add(content);
         }
         return list;
     }

     /**
      * 根据Cell类型设置数据
      * @param cell
      * @return
      */
     private static String getCellFormatValue(Cell 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 Cell.CELL_TYPE_NUMERIC:
                 case Cell.CELL_TYPE_FORMULA: {
                     // 判断当前的cell是否为Date
                     if (HSSFDateUtil.isCellDateFormatted(cell)) {
                         Date date = cell.getDateCellValue();
                         cellValue = new SimpleDateFormat("yyyy-MM-dd").format(date);// 时间格式化显示：2012-12-31
                     } else {
                         // 如果是纯数字取得当前Cell的数值
                         cellValue = String.valueOf(cell.getNumericCellValue());
                     }
                     break;
                 }
                 // 如果当前Cell的Type为STRIN
                 case Cell.CELL_TYPE_STRING:
                     cellValue = cell.getRichStringCellValue().getString();
                     break;
                 default:
                     // 默认的Cell值
                     cellValue = " ";
             }
         }
         return cellValue;

     }

     /**
      * 创建 Workbook
      * @param is
      * @return
      * @throws IOException
      * @throws InvalidFormatException
      */
     public static Workbook createWorkbook(InputStream is) throws IOException,InvalidFormatException {
         if (!is.markSupported()) {
             is = new PushbackInputStream(is, 8);
         }
         if (POIFSFileSystem.hasPOIFSHeader(is)) {
             return new HSSFWorkbook(is);
         }
         if (POIXMLDocument.hasOOXMLHeader(is)) {
             return new XSSFWorkbook(OPCPackage.open(is));
         }
         throw new IllegalArgumentException("POI解析不了您当前的Excel版本");
     }

     /**
      * 测试
      * @param args
      */
     public static void main(String args[]) {
         String filePath = "D:\\Test.xls";
         List<Map<String, String>> list = readExcelContent(filePath);
         Map<String, String> map;
         for (int i = 0; i < list.size(); i++) {
             map = list.get(i);
             System.out.println("**************THE START OF ROW("+(i+1)+")**************");
             for (String key : map.keySet()) {
                 System.out.println(key + " : " + map.get(key));
             }
         }
     }
 }