Java 中POI 导入EXCEL2003 和EXCEL2007的实现方法

import java.io.FileInputStream; 
import java.io.IOException; 
import java.math.BigDecimal; 
import java.text.SimpleDateFormat; 
import java.util.ArrayList; 
import java.util.List; 
 
import org.apache.poi.POIXMLException; 
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.OfficeXmlFileException; 
import org.apache.poi.ss.usermodel.Cell; 
import org.apache.poi.xssf.usermodel.XSSFCell; 
import org.apache.poi.xssf.usermodel.XSSFRow; 
import org.apache.poi.xssf.usermodel.XSSFSheet; 
import org.apache.poi.xssf.usermodel.XSSFWorkbook; 
 
/** 
 * excel 导入功能 
 * @author lyq 20150312 
 * @version 1.0 
 */ 
public class ExcelUtils { 
   
  public List<Object[]> importExcel(String filePath) throws Exception{ 
    List<Object[]> list=new ArrayList<Object[]>(); 
    String fileType=filePath.substring(filePath.lastIndexOf(".")+1); 
    try { 
      if("xls".equalsIgnoreCase(fileType)){ 
        list= importExcel03(filePath); 
      }else{ 
        list= importExcel07(filePath); 
      } 
    } catch(OfficeXmlFileException e){//通过手动修改文件名 引起的异常 比如 3.xlsx 重命名 3.xls 其实际文件类型为xlsx 
      list=importExcel07(filePath); 
    } catch(POIXMLException e){//通过手动修改文件名 引起的异常 比如 3.xls 重命名 3.xlsx 其实际文件类型为xls 
      list=importExcel03(filePath); 
    } 
    return list; 
  } 
  public List<Object[]> importExcel03(String filePath) throws IOException{ 
    FileInputStream in=new FileInputStream(filePath); 
    List<Object[]> list=new ArrayList<Object[]>(); 
    HSSFWorkbook wb=new HSSFWorkbook(in); 
    HSSFSheet sheet = wb.getSheetAt(0); 
    int rows = sheet.getPhysicalNumberOfRows(); 
    HSSFRow row=sheet.getRow(0); 
    int cells=row.getLastCellNum(); 
    Object[] csr=null; 
    for(int i=1;i<rows;i++){ 
      row=sheet.getRow(i); 
      csr=new String[cells]; 
      for(int j=0;j<cells;j++){ 
        HSSFCell cell=row.getCell(j); 
        Object obj=null; 
        if(cell!=null){ 
          obj=getValue(cell); 
        } 
        csr[j]=obj; 
      } 
      list.add(csr); 
    } 
    if(in!=null)in.close(); 
    return list; 
  } 
  public List<Object[]> importExcel07(String filePath) throws IOException{ 
    List<Object[]> list=new ArrayList<Object[]>(); 
    FileInputStream in=new FileInputStream(filePath); 
    XSSFWorkbook wb=new XSSFWorkbook(in); 
    XSSFSheet sheet = wb.getSheetAt(0); 
    int rows = sheet.getPhysicalNumberOfRows(); 
    XSSFRow row=sheet.getRow(0); 
    int cells=row.getLastCellNum(); 
    Object[] csr=null; 
    for(int i=1;i<rows;i++){ 
      row=sheet.getRow(i); 
      csr=new String[cells]; 
      for(int j=0;j<cells;j++){ 
        XSSFCell cell=row.getCell(j); 
        Object obj=null; 
        if(cell!=null){ 
          obj=getValue(cell); 
        } 
        csr[j]=obj; 
      } 
      list.add(csr); 
    } 
    if(in!=null)in.close(); 
    return list; 
  } 
  @SuppressWarnings("static-access") 
  public String getValue(Cell cell){ 
    int type=cell.getCellType(); 
    String s=""; 
    if(type==cell.CELL_TYPE_NUMERIC){ 
      if(HSSFDateUtil.isCellDateFormatted(cell)){ 
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
        s=sdf.format(cell.getDateCellValue()); 
      }else { 
        BigDecimal db = new BigDecimal(cell.getNumericCellValue()); 
        s=String.valueOf(db); 
      } 
    }else if(type==cell.CELL_TYPE_STRING){ 
      s=cell.getStringCellValue(); 
    }else if(type==cell.CELL_TYPE_BOOLEAN){ 
      s=cell.getBooleanCellValue()+""; 
    }else if(type==cell.CELL_TYPE_FORMULA){ 
      s=cell.getCellFormula(); 
    }else if(type==cell.CELL_TYPE_BLANK){ 
      s=" "; 
    }else if(type==cell.CELL_TYPE_ERROR){ 
      s=" "; 
    }else{ 
       
    } 
    return s.trim(); 
  } 
  /** 
   * @param args 
   */ 
  public static void main(String[] args) { 
    ExcelUtils ex=new ExcelUtils(); 
    try { 
      List<Object[]> list=ex.importExcel("D:\\3.xls"); 
      for(Object[] ss:list){ 
        for(Object s:ss){ 
          System.out.print(s+"\t"); 
        } 
        System.out.println(); 
      } 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  } 
 
}