apache poi 导入2007excel 及处理excel不可读取内容！

天高云淡

处理excel主要是三层循环，对工作表的循环，对行数的循环，对单元格的循环
try {
is = new FileInputStream(file);
HSSFWorkbook wb=null;
try {
//office 2003和以前版本
wb = new HSSFWorkbook(new POIFSFileSystem(is));
} catch (RuntimeException e) {
//office 2007版本
XSSFWorkbook wb1 = new XSSFWorkbook(file.getPath());
return import2007(wb1);
}
//工作表数
int sheetNum = wb.getNumberOfSheets();
for (int i = 0; i < sheetNum ; i++) {
HSSFSheet childSheet = wb.getSheetAt(i);
int rowNum = childSheet.getLastRowNum();
for (int j = childSheet.getFirstRowNum(); j < rowNum; j++) {
HSSFRow row = childSheet.getRow(j);
if(row!=null){
int cellNum = row.getLastCellNum();
String[] str=new String[cellNum];
for (int k = 0; k < cellNum; k++) {
if(row.getCell(k)!=null){
str[k]=row.getCell(k).toString();
}else{
str[k]=null;
}
}
}
}
}
}


//2007版本excel
public String import2007(XSSFWorkbook wb){
StockderDAO dao=(StockderDAO)getDao();
int sheetNum = wb.getNumberOfSheets();
for (int i = 0; i <sheetNum ; i++) {
XSSFSheet childSheet = wb.getSheetAt(i);
int rowNum = childSheet.getLastRowNum();
for (int j = childSheet.getFirstRowNum(); j < rowNum; j++) {
XSSFRow row = childSheet.getRow(j);
int cellNum = row.getLastCellNum();
String[] str=new String[cellNum];
for (int k = 0; k < cellNum; k++) {
if(row.getCell(k)!=null){
str[k]=row.getCell(k).toString();
}else{
str[k]=null;
}
}
if(j!=0){
boolean flag=dao.getBuyDistinct(str,this.request.getParameterMap());
if(flag){
XSSFCell cel=row.createCell(cellNum );
cel.setCellValue("R");
}
}
}
}
ServletOutputStream fOut=null;
try {
fOut=response.getOutputStream();
wb.write( fOut);
fOut.flush();
fOut.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return NONE;
}

关于excel不可读取的内容：当我们把2007的excel另存为 2003excel的格式的时候，然后以2003excel导入到程序，这时如生成的是2003excel,而原本的2007excel如果有安全设置或宏 在打开excel的时候就 弹出 有些内容不可读取的提示！
下面的附件 就是导入2007的excel所需要的jar包！