POI-Excel大資料量的寫入

public class ExcelWriteTest {

    String PATH = "C:\\Users\\Kven_J\\idea-workspace\\POI-EasyExcel\\chang-poi-";

    @Test
    public void testWrite07BigData() throws IOException {
        //開始時間
        long begin = System.currentTimeMillis();

        //建立一個工作簿
        Workbook wb = new
 
 XSSFWorkbook();
        //建立一個工作表
        Sheet sheet = wb.createSheet();
        //寫入資料
        for (int rowNum = 0; rowNum < 100000; rowNum++) {
            Row row = sheet.createRow(rowNum);
            for (int cellNum = 0; cellNum < 10; cellNum++) {
                Cell cell = row.createCell(cellNum);
                cell.setCellValue(cellNum);
            }
        }
        
 
//生成表（IO流）  07版本使用.xlsx結尾
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "07BigData.xlsx");
        wb.write(fileOutputStream);
        fileOutputStream.close();
        //結束時間
        long end = System.currentTimeMillis();
        System.out.println((double) (end-begin)/1000);
    }

    @Test
    
 
public void testWrite07BigDataS() throws IOException {
        //開始時間
        long begin = System.currentTimeMillis();

        //建立一個工作簿
        Workbook wb = new SXSSFWorkbook();
        //建立一個工作表
        Sheet sheet = wb.createSheet();
        //寫入資料
        for (int rowNum = 0; rowNum < 100000; rowNum++) {
            Row row = sheet.createRow(rowNum);
            for (int cellNum = 0; cellNum < 10; cellNum++) {
                Cell cell = row.createCell(cellNum);
                cell.setCellValue(cellNum);
            }
        }
        //生成表（IO流）  07版本使用.xlsx結尾
        FileOutputStream fileOutputStream = new FileOutputStream(PATH + "07BigDataS.xlsx");
        wb.write(fileOutputStream);
        fileOutputStream.close();
        //清除臨時檔案
        ((SXSSFWorkbook)wb).dispose();
        //結束時間
        long end = System.currentTimeMillis();
        System.out.println((double) (end-begin)/1000);
    }
}