需要jar包
poi-3.15-beta1.jar
poi-excelant-3.15-beta1.jar
poi-ooxml-3.15-beta1.jar
curvesapi-1.03.jar
xmlbeans-2.6.0.jar
poi-ooxml-schemas-3.15-beta1.jar
創建一個excel
public static void main(String[] args) throws Exception {
SXSSFWorkbook wb = new SXSSFWorkbook(100); // 創建workbook對象,100行數據保存在內存中,超出時刷新到臨時文件中
Sheet sh = wb.createSheet(); //創建一個sheet
Row row = sh.createRow(0);//創建一行,行號從0開始 ,0位第一行
Cell cell = row.createCell(0);//創建一個單元格,單元格號從零開始 ,0位第一個單元格
String address = new CellReference(cell).formatAsString(); //獲取該單元格地址
cell.setCellValue(address);//設置單元格值
FileOutputStream out = new FileOutputStream("c://2.xlsx"); //創建輸出流
wb.write(out);//將文件寫出
out.close();
// dispose of temporary files backing this workbook on disk
wb.dispose();
}
讀取一個execl
public static void main(String[] args) throws Exception {
Workbook wb = WorkbookFactory.create(new File("D:\\1.xlsx")); //創建該execk的workbook對象
Sheet sheet = wb.getSheetAt(0);//獲取第一個Sheet
for(int j=sheet.getFirstRowNum();j<=sheet.getLastRowNum();j++){//循環編譯該sheet頁面所有行
Row row=sheet.getRow(j);
for(int i=row.getFirstCellNum();i<=row.getLastCellNum()-1;i++){//循環編譯該行所有單元格
Cell cell=row.getCell(i);
if(cell.isPartOfArray Group()){//是否是公式單元格
try {
System.out.print(cell.getNumericCellValue());
} catch (IllegalStateException e) {
}
}else{
//設置單元格類型
cell.setCellType(Cell.CELL_TYPE_STRING);
//輸出單元格值
System.out.print(cell.getStringCellValue()+" ");
}
}
System.out.println();
}
}