poi reads the template, populate the template data, the export template modification

public  void to_exportAllAssess () { 
        the ArrayList <AssessResultDetail> = assessResultDetailList query data ready to be filled excel 
        HSSFWorkbook Workbook = AssessExportUtil.exportAllAssess (assessResultDetailList);
         the try {
             // the response to the client 
            the this .setResponseHeader (Response, assessTime.getName () + "Statistics table * .xls " ); 
            the OutputStream OS = response.getOutputStream (); 
            workbook.write (OS); 
            os.flush (); 
            os.close (); 
        } the catch (Exception E) { 
            e.printStackTrace (); 
        } 
    }
    
    //发送响应流方法
public void setResponseHeader(HttpServletResponse response, String fileName) {
    try {
        try {
                fileName = new String(fileName.getBytes(),"ISO8859-1");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            response.setContentType("application/octet-stream;charset=ISO8859-1");
            response.setHeader("Content-Disposition", "attachment;filename="+ fileName);
            response.addHeader("Pargam", "no-cache");
            response.addHeader("Cache-Control", "no-cache");
       } catch (Exception ex) {
           ex.printStackTrace();
    }
}

Package .. COM * util; 

Import java.io.File;
 Import a java.io.FileInputStream;
 Import of java.util.ArrayList; 

Import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 Import org.apache.struts2.ServletActionContext;
 Import .. COM AssessResultDetail *; 

public  class AssessExportUtil {
     / * 
    HSSFWorkbook: operating Excel2003 past (2003) version of the extension is * .xls 
    XSSFWorkbook: Excel2007 operating version of the extension is .xlsx * / 
    public  static HSSFWorkbook exportAllAssess (the ArrayList <AssessResultDetail> assessResultDetailList) {
         // Excel template path
        File file = new File(ServletActionContext.getServletContext().getRealPath("/WEB-INF/templet/"), "assessValue.xls");
        HSSFWorkbook workbook = null;
         if(file.exists()) {    //文件存在
             try {//创建workbook
                 workbook = new HSSFWorkbook(new FileInputStream(file));
　　　　　　　　　　//TODO 数据填充excel
             }catch(Exception e){
                 e.printStackTrace();
             }
         }
        return workbook;
    }
    
}