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
创建一个excel
public static void main(String[] args) throws Exception {
SXSSFWorkbook wb = new SXSSFWorkbook(100); // 创建workbook对象,100行数据保存在内存中,超出时刷新到临时文件中
Sheet sh = wb.createSheet(); //创建一个sheet
Row row = sh.createRow(0);//创建一行,行号从0开始 ,0位第一行
Cell cell = row.createCell(0);//创建一个单元格,单元格号从零开始 ,0位第一个单元格
String address = new CellReference(cell).formatAsString(); //获取该单元格地址
cell.setCellValue(address);//设置单元格值
FileOutputStream out = new FileOutputStream("c://2.xlsx"); //创建输出流
wb.write(out);//将文件写出
out.close();
// dispose of temporary files backing this workbook on disk
wb.dispose();
}
读取一个execl
public static void main(String[] args) throws Exception {
public static void main(String[] args) throws Exception {
Workbook wb = WorkbookFactory.create(new File("D:\\1.xlsx")); //创建该execk的workbook对象
Sheet sheet = wb.getSheetAt(0);//获取第一个Sheet
for(int j=sheet.getFirstRowNum();j<=sheet.getLastRowNum();j++){//循环编译该sheet页面所有行
Row row=sheet.getRow(j);
for(int i=row.getFirstCellNum();i<=row.getLastCellNum()-1;i++){//循环编译该行所有单元格
Cell cell=row.getCell(i);
if(cell.isPartOfArray Group()){//是否是公式单元格
try {
System.out.print(cell.getNumericCellValue());
} catch (IllegalStateException e) {
}
}else{
//设置单元格类型
cell.setCellType(Cell.CELL_TYPE_STRING);
//输出单元格值
//输出单元格值
System.out.print(cell.getStringCellValue()+" ");
}
}
System.out.println();
}
}