java操作Excel效率之poi与fastexcel比较

public void testPoiExcel(String strPath) throws Exception {

HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(strPath));

HSSFSheet sheet = wb.getSheetAt(0);

HSSFRow row;
HSSFCell cell;

for (int i = sheet.getFirstRowNum(); i < sheet.getLastRowNum(); i++) {
row = sheet.getRow(i);
for (int j = row.getFirstCellNum(); j < row.getLastCellNum(); j++) {
cell = row.getCell((short) j);
}
}
}

public void testFastExcel(String strPath) throws Exception {

Workbook workBook = FastExcel.createReadableWorkbook(new File(strPath));
workBook.open();

Sheet s = workBook.getSheet(0);

String[] row;
String cell;

for (int i = s.getFirstRow(); i <= s.getLastRow(); i++) {
row = s.getRow(i);
for (int j = s.getFirstColumn(); j <= s.getLastColumn(); j++) {
cell = s.getCell(i, j);
}
}

workBook.close();
}

public static void main(String [] args){
writeExcel("testPoi.xls");
System.out.println(readExcel(new File("testPoi.xls")));
}

private static void writeExcel(String fileName) {
HSSFWorkbook wb = new HSSFWorkbook();
for(int sheetIndx = 0; sheetIndx < 5 ;sheetIndx++){
HSSFSheet sheet = wb.createSheet("sheet" + sheetIndx);
HSSFRow row;
HSSFCell cell;
for (int rowIndex = 0; rowIndex < 10; rowIndex++) {
row = sheet.createRow(rowIndex);
for (int cellIndex = 0; cellIndex < 5; cellIndex++) {
cell = row.createCell(cellIndex);
cell.setCellValue("hello");
}
}
}
FileOutputStream fos = null;
try{
initFile(fileName);
fos = new FileOutputStream(fileName);
wb.write(fos);
}catch(Exception e){
e.printStackTrace();

} finally {
try {
fos.flush();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

private static String readExcel(File file) {
StringBuffer strBuffer = new StringBuffer();
HSSFWorkbook wb;
FileInputStream fs = null;
try {
fs = new FileInputStream(file);
wb = new HSSFWorkbook(fs);
int sheetNum = wb.getNumberOfSheets();
for(int sheetIndx = 0; sheetIndx < sheetNum ;sheetIndx++){
HSSFSheet sheet = wb.getSheetAt(sheetIndx);
HSSFRow row;
HSSFCell cell;
strBuffer.append(wb.getSheetName(sheetIndx)+ "/r/n");
for (int i = sheet.getFirstRowNum(); i < sheet.getLastRowNum(); i++) {
row = sheet.getRow(i);
for (int j = row.getFirstCellNum(); j < row.getLastCellNum(); j++) {
cell = row.getCell(j);
strBuffer.append(cell.toString() + "/t");
}
strBuffer.append("/r/n");
}
}
}catch (Exception e){

} finally {
try {
fs.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return strBuffer.toString();
}
private static void initFile(String filePath) {
File file = new File(filePath);
if(!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}