在开发的过程当中,经常遇到用文件上传的方式批量处理数据的方式,以前碰到的情况是先将文件保存到本地的临时文件,然后用poi的方式来进行处理,但是实际上,操作过程只是简单的读取操作,所以就不用那么复杂,下面记录了用servlet的javax.servlet.http.Part包的方式来处理这个功能。代码如下:
Part part=request.getPart("标签name"); String filename=getFileName(part.getHeader("content-disposition") ); Boolean resultCode = true; StringBuffer result=new StringBuffer(); //校验 if(StringHelper.isEmpty(filename)){ result.append("请上传文件"); resultCode = false; }else if(!filename.endsWith("csv")){ result.append("上传文件只支持csv"); resultCode = false; } if(resultCode){ BufferedReader reader = new BufferedReader(new InputStreamReader(part.getInputStream())); String line=null; boolean isFirst=true; while ((line = reader.readLine()) != null) { if(!isFirst){ result.append(line).append(","); }else{ isFirst=false; } } if(0<result.length()){ result=result.delete(result.length()-1, result.length()); } } response.setContentType("text/html;charset=UTF-8"); response.getWriter().print("<script type=‘text/javascript‘>parent.callBack(‘"+result.toString()+"‘,‘"+resultCode+"‘);</script>"); response.getWriter().close(); return;
private String getFileName(String header) { if(!StringHelper.isEmpty(header)){ String[] tempArr1 = header.split(";"); String[] tempArr2 = tempArr1[2].split("="); String fileName = tempArr2[1].substring(tempArr2[1].lastIndexOf("\\")+1).replaceAll("\"", ""); return fileName; }else{ return ""; } }
时间: 2024-10-09 04:38:11