java-poi创建模板

package com.jy.demo.web;

import java.io.FileOutputStream;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class TestExcel {
    
     public static void main(String[] args) throws Exception {
        Workbook wb = new XSSFWorkbook();  // or new XSSFWorkbook();
          
        Sheet sheet = wb.createSheet("sheet1");
        Row rowt = sheet.createRow(0);

        Cell cellt = rowt.createCell(0);
        cellt.setCellValue("学号");

        Cell cell1t = rowt.createCell(1);
        cell1t.setCellValue("姓名");

        Cell cell2t11 = rowt.createCell(2);
        cell2t11.setCellValue("性别");

        Cell cell2t = rowt.createCell(3);
        cell2t.setCellValue("科目");

        Cell cell2t1 = rowt.createCell(4);
        cell2t1.setCellValue("成绩");

        // 创建单元格样式对象
        XSSFCellStyle alignStyle = (XSSFCellStyle) wb.createCellStyle();
        alignStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); // 居中对齐
        alignStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
        cellt.setCellStyle(alignStyle);
              
                
        int y = 2;
        int num = 0;
        for (int i = 1; i <= 30; i = i + 3) {
            num++;
            Row row1 = sheet.createRow(i);

            Cell cell1 = row1.createCell(0);
            sheet.addMergedRegion(CellRangeAddress.valueOf("$A$" + y + ":$A$"+ (y + 2)));
            cell1.setCellValue("00" + num);
            cell1.setCellStyle(alignStyle);

            Cell cell2 = row1.createCell(1);
            sheet.addMergedRegion(CellRangeAddress.valueOf("$B$" + y + ":$B$"+ (y + 2)));
            cell2.setCellValue("张三");
            cell2.setCellStyle(alignStyle);

            Cell cell21 = row1.createCell(2);
            sheet.addMergedRegion(CellRangeAddress.valueOf("$C$" + y + ":$C$"+ (y + 2)));
            cell21.setCellValue("男");
            cell21.setCellStyle(alignStyle);

            y = y + 3;

            Cell cell3 = row1.createCell(3);
            cell3.setCellValue("语文");

            Row row2 = sheet.createRow(i + 1);
            Cell cellr2 = row2.createCell(3);
            cellr2.setCellValue("数学");

            Row row3 = sheet.createRow(i + 2);
            Cell cellr3 = row3.createCell(3);
            cellr3.setCellValue("英语");

            Cell cell4 = row1.createCell(4);
            cell4.setCellValue("1222");

            Cell cell41 = row2.createCell(4);
            cell41.setCellValue("98");

            Cell cell411 = row3.createCell(4);
            cell411.setCellValue("981");

        }
        FileOutputStream fileOut = new FileOutputStream("E:\workbook.xls");
        wb.write(fileOut);
        fileOut.close();
     }
        
}