Java操作Excel（二）将数据库中的数据导出到Excel中

public void exportToExcel() {
  try {
  
   ArrayList list = this.getSelectedCourseStudentsTableData();
   System.out.println("=============size:" + list.size());
   if (list != null && list.size() > 0) {

    Long tp = new Long(System.currentTimeMillis());
    String path = getApplicationBean().getFilePath()
      + "printfiles/" + tp.toString() + ".xls";
    String name=path.substring(path.lastIndexOf('/')+1,path.length());
   
    OutputStream outf = new FileOutputStream(path);
    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("StudentCource");
    sheet.setColumnWidth((short)0,(short)4000);  //设置单元格的长度
    sheet.setColumnWidth((short)3,(short)4000); 
    sheet.setColumnWidth((short)5,(short)6000); 
    sheet.setColumnWidth((short)6,(short)6000); 
    sheet.setHorizontallyCenter(true);

    HSSFRow row1 = sheet.createRow(0);

    HSSFCell cell1 = row1.createCell((short) 0);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("学号");
   
    cell1 = row1.createCell((short) 1);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("姓名");
   
    cell1 = row1.createCell((short) 2);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("性别");
   
    cell1 = row1.createCell((short) 3);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("学生类别");
   
    cell1 = row1.createCell((short) 4);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("年级");
   
    cell1 = row1.createCell((short) 5);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("所属学院");
   
    cell1 = row1.createCell((short) 6);
    cell1.setEncoding(HSSFCell.ENCODING_UTF_16);// 设置编码
    cell1.setCellValue("所学专业");

    ArrayList selectedCourseStudentslist = this
      .getSelectedCourseStudentsTableData();
    for (int i = 0; i < selectedCourseStudentslist.size(); i++) {
     HSSFRow row = sheet.createRow(i+1);
     PgtStatusInfo pgtStatusInfo = (PgtStatusInfo) selectedCourseStudentslist
       .get(i);
     HSSFCell cell = row.createCell((short) 0);
     cell.setCellValue(pgtStatusInfo.getStudentNo());
     cell = row.createCell((short) 1);
     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     cell.setCellValue(pgtStatusInfo.getName());
     cell = row.createCell((short) 2);
     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     cell.setCellValue(pgtStatusInfo.getSexCn());
     cell = row.createCell((short) 3);
     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     cell.setCellValue(pgtStatusInfo.getPgtTypeCn());
     cell = row.createCell((short) 4);
     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     cell.setCellValue(pgtStatusInfo.getGradeCn());
     cell = row.createCell((short) 5);
     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     cell.setCellValue(pgtStatusInfo.getBelongDeptCn());
     cell = row.createCell((short) 6);
     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     cell.setCellValue(pgtStatusInfo.getSpeCn());
    }
    wb.write(outf);
    outf.close();

    this.excelLink ="./files/printfiles/" + name;
    this.excelFileLinkVisible = true;
    this.outputFileLinkVisible = false;
   } else {
    getApplicationBean().addMessage(FacesMessage.SEVERITY_INFO,
      "导出excel内容为空！", null);
   }

  } catch (Exception e) {
   getApplicationBean().addMessage(FacesMessage.SEVERITY_ERROR,
     "导出excel操作失败！", e.getMessage());
  }
}



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