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;   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();   }      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();     }   }  }