POI 博客总结.....

主键类：

HSSFRow row1= sheet.createRow(1);
        row.createCell(0).setCellValue("学生编号");
        row.createCell(1).setCellValue("学生姓名");
        row.createCell(2).setCellValue("学生年龄");

POI包：

 <dependency>
  <groupId>org.apache.poi</groupId>
  <artifactId>poi</artifactId>
  <version>3.17-beta1<ersion>
</dependency>

 @Test
    public void aa() throws IOException {

//创建HSSFWorkbook对象

        HSSFWorkbook wb=new HSSFWorkbook();
//创建HSSFSheet对象（excel表单）
        HSSFSheet sheet = wb.createSheet("成绩表");

        HSSFRow row = sheet.createRow(0);

        HSSFCell cell=row.createCell(0);

        cell.setCellValue("学员考试成绩表");

        sheet.addMergedRegion(new CellRangeAddress(0,0,0,3));

        HSSFRow row1=sheet.createRow(1);

        row1.createCell(0).setCellValue("姓名");
        row1.createCell(1).setCellValue("班级");
        row1.createCell(2).setCellValue("笔试成绩");

        HSSFRow row2=sheet.createRow(2);

        row2.createCell(0).setCellValue("黎明");
        row2.createCell(1).setCellValue("s2");
        row2.createCell(2).setCellValue("100");

        FileOutputStream output=new FileOutputStream("f:\workbook.xls");
        wb.write(output);
        output.flush();