poi之excel的模板導出(推薦)

poi模板導出數據

優點:導出的excel頁面布局整齊

 

 

1.導出的步驟代碼

con=dbUtil.getCon();//數據庫連接,根據需求修改
ResultSet rs=userDao.userList(con, null);//數據庫數據獲取
Workbook wb=ExcelUtil.fillExcelDataWithTemplate(userDao.userList(con, null), "userExporTemplate.xls");//模板寫入數據函數
ResponseUtil.export(ServletActionContext.getResponse(), wb, "利用模版導出excel.xls");//數據流推送到頁面

2.模板寫入數據函數

public class ExcelUtil {
　　//基本導出函數
    public static void fillExcelData(ResultSet rs,Workbook wb,String[] headers)throws Exception{
        int rowIndex=0;
        Sheet sheet=wb.createSheet();
        Row row=sheet.createRow(rowIndex++);
        for(int i=0;i<headers.length;i++){
            row.createCell(i).setCellValue(headers[i]);
        }
        while(rs.next()){
            row=sheet.createRow(rowIndex++);
            for(int i=0;i<headers.length;i++){
                row.createCell(i).setCellValue(rs.getObject(i+1).toString());
            }
        }
    }
    //模板導出函數
    public static Workbook fillExcelDataWithTemplate(ResultSet rs,String templateFileName)throws Exception{
        InputStream inp=ExcelUtil.class.getResourceAsStream("/com/java1234/template/"+templateFileName);
        POIFSFileSystem fs=new POIFSFileSystem(inp);
        Workbook wb=new HSSFWorkbook(fs);
        Sheet sheet=wb.getSheetAt(0);
        // 獲取列數
        int cellNums=sheet.getRow(0).getLastCellNum();
        int rowIndex=1;
        while(rs.next()){
            Row row=sheet.createRow(rowIndex++);
            for(int i=0;i<cellNums;i++){
                row.createCell(i).setCellValue(rs.getObject(i+1).toString());
            }
        }
        return wb;
    }
}

3.數據流寫出數據

public class ResponseUtil {

    public static void write(HttpServletResponse response,Object o)throws Exception{
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out=response.getWriter();
        out.print(o.toString());
        out.flush();
        out.close();
    }
    
    public static void export(HttpServletResponse response,Workbook wb,String fileName)throws Exception{
        response.setHeader("Content-Disposition", "attachment;filename="+new String(fileName.getBytes("utf-8"),"iso8859-1"));
        response.setContentType("application/ynd.ms-excel;charset=UTF-8");
        OutputStream out=response.getOutputStream();
        wb.write(out);
        out.flush();
        out.close();
    }

}

 4.導出的模板(定義好模板的樣式,需要插入的數據按row循環插入)