学步园

public class UploadAction{
	private TPoiService ts;
	
	public TPoiService getTs() {
		return ts;
	}

	public void setTs(TPoiService ts) {
		this.ts = ts;
	}

	public File getNewFile(String path){
		File file=new File(path);
		File[] dir=file.listFiles();
		System.out.println(dir.length);
		int[] newfiles=new int[dir.length];
		for (int i = 0; i < dir.length; i++) {
//			System.out.println(dir[i]);
			newfiles[i]=Integer.parseInt(dir[i].getName().substring(0,dir[i].getName().indexOf(".")));
		}
		int num1=newfiles[0];
		for (int j = 0; j < newfiles.length; j++) {
			if(newfiles[j]>num1){
				num1=newfiles[j];
			}
		}
		System.out.println(num1);
		return new File(path+"\\"+num1+".xls");
	}
	
	@Action(value="upload",className="upload",results={@Result(name="success",location="/upload.jsp",type="dispatcher"),
			@Result(name="error",location="/Page/error.jsp",type="dispatcher")})
	public String upload() throws IOException{
		System.out.println("this is upload");
		HttpServletResponse response=ServletActionContext.getResponse();
//		PrintWriter out = response.getWriter();
		File file=getNewFile(ServletActionContext.getRequest().getRealPath("xls"));
		response.setContentType("application/vnd.ms-excel;charset=UTF-8");

		response.setHeader("Content-Disposition", "attachment;filename="+ new String("isd.xls".getBytes(), "iso-8859-1"));
		
		ServletOutputStream out = response.getOutputStream();  
		 
		BufferedInputStream bis = null;
		 
		BufferedOutputStream bos = null;
		 
		try {  
		    bis = new BufferedInputStream(new FileInputStream(file) {
		    @Override
		    public int read() throws IOException {
		      // TODO Auto-generated method stub
		        return 0;
		    }
		 });  
		     bos = new BufferedOutputStream(out);  
		 
		     byte[] buff = new byte[2048];  
		 
		     int bytesRead;  
		 
		     // Simple read/write loop.  
		     while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {  
		            bos.write(buff, 0, bytesRead);  
		        }
		    } catch (final IOException e) {  
		        System.out.println("IOException.");  
		        throw e;  
		    } finally {  
		        if (bis != null)  
		            bis.close();  
		        if (bos != null)  
		            bos.close();  
		    }  
		return null;
	}