学步园

public class CreateSimpleExcelToDisk {

    /**
     * @作者：heasen
     * @日期：2010-3-24
     * @功能：手工构建一个简单格式的Excel
     */
    private static List<Student> getStudent() throws Exception{
        List list = new ArrayList();
        SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
        
        Student user1 = new Student(1,"张三",16,df.parse("1997-03-12"));
        Student user2 = new Student(2,"李四",17,df.parse("1996-08-12"));
        Student user3 = new Student(3,"王五",26,df.parse("1985-11-12"));
        list.add(user1);
        list.add(user2);
        list.add(user3);
        
        return list;
    }
    public static void main(String[] args) throws Exception {
        //第一步，创建一个webbook，对应一个Excel文件
        HSSFWorkbook wb = new HSSFWorkbook();
        //第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
        HSSFSheet sheet = wb.createSheet("学生表一");
        //第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
        HSSFRow row = sheet.createRow((int)0);
        //第四步，创建单元格，并设置值表头  设置表头居中
        HSSFCellStyle style = wb.createCellStyle();
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //创建一个居中格式
        
        HSSFCell cell = row.createCell((short)0);
        cell.setCellValue("学号"); cell.setCellStyle(style);
        cell = row.createCell((short)1);
        cell.setCellValue("姓名"); cell.setCellStyle(style);
        cell = row.createCell((short)2);
        cell.setCellValue("年龄"); cell.setCellStyle(style);
        cell = row.createCell((short)3);
        cell.setCellValue("生日"); cell.setCellStyle(style);
    
        //第五步，写入实体数据 实际应用中这些数据从数据库得到，
        List list = CreateSimpleExcelToDisk.getStudent();

        for(int i=0;i<list.size();i++){
            row = sheet.createRow((int)i+1);
            Student stu = (Student) list.get(i);
            //第四步，创建单元格，并设置值
            row.createCell((short)0).setCellValue((double)stu.getId());
            row.createCell((short)1).setCellValue(stu.getName());
            row.createCell((short)2).setCellValue((double)stu.getAge());
            cell = row.createCell((short)3);
            cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu.getBirth()));
        }
        //第六步，将文件存到指定位置
        try {
            FileOutputStream fout = new FileOutputStream("E:/students.xls");
            wb.write(fout);
            fout.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}