Go语言视频零基础入门到精通

javalearner

Struts对Apache的commons-fileupload进行了再封装，把上传的文件封装成FormFile对象，直接获取该对象，将文件保存即可。
1，UploadForm.java：
     private String action;
     private String text;
     private FormFile file;
2，upload.jsp：
  <HTML:form action="/upload?action=upload" method="post" enctype="multipart/form-data">
   文件 : <html:file property="file" style="width:200px;"/><html:errors property="file"/><br/>  
   备注 : <html:textarea property="text" style="width:200px;"/><html:errors property="text"/><br/>
   <html:submit value="开始上传"/>
  </html:form>
3,UploadAction.java:
public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) throws Exception {
  UploadForm uploadForm = (UploadForm) form;// TODO Auto-generated method stub
  if("upload".equals(uploadForm.getAction())){
   return upload(mapping,form,request,response);
  }
  return mapping.getInputForward();
}


public ActionForward upload(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) throws Exception{
  UploadForm uploadForm = (UploadForm) form;// TODO Auto-generated method stub

  StringBuffer buffer = new StringBuffer();
  buffer.append("<style>body{font-size:12px;}</style>");
  
  if(uploadForm.getFile() != null&& uploadForm.getFile().getFileSize() > 0){
   
   //获取文件夹/WEB-INF/classes
   File classes = new File(getClass().getClassLoader().getResource("").getFile());
   
   //获取文件夹/upload
   File uploadFolder = new File(classes.getParentFile().getParentFile(),"upload");
   uploadFolder.mkdirs(); //创建父文件夹
   
   //保存到/upload下面
   File file = new File(uploadFolder,uploadForm.getFile().getFileName());
   
   OutputStream ous = null;  //文件输出流
   InputStream ins = null; //上传文件输入流
   
   try{
    byte[] b = new byte[1024];  //缓存数组
    int len = 0;
    ins = uploadForm.getFile().getInputStream(); //上传文件输入流
   
    ous = new FileOutputStream(file); //文件输出流
    while((len = ins.read(b)) != -1)
     ous.write(b,0,len);  //循环写到文件中
   }finally{
    ins.close();
    ous.close();
   }
   buffer.append("文件：<a href=upload/"+file.getName()+" target=_blank>"+file.getName()+"</a><br/>");
  }else{
   buffer.append("文件：没有选择文件<br/>");
  }
  buffer.append("备注:"+uploadForm.getText()+"<br/>");
  response.setCharacterEncoding("UTF-8");
  response.getWriter().write(buffer.toString());//直接输出内容到客户端
  
  return null;
}

lwenw22

谢谢楼主 分享。