<s:form action ="upload" method ="POST" enctype ="multipart/form-data" >    
                <s:file name ="file" label ="上传文件"/> 
                <s:submit />    
        </s:form >

  private File file; 
    
  private String fileFileName; 
    
  private String fileContextType; 
    
  private String root; 
    
  private HttpServletRequest request; 
  private Map session; 
    
  @Override 
  public String execute() throws Exception { 
     
    session.put("fileFileName", fileFileName); 
     
    //取文件后缀名 
    String lastname=null; 
    int i = fileFileName.lastIndexOf('.'); 
    lastname=fileFileName.substring(i+1);        
                    
    //取当前日期 
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); 
    Calendar calendar = Calendar.getInstance(); 
    String date=sdf.format(calendar.getTime()); 
     
    //10亿的随机数 
    java.util.Random r=new java.util.Random();    
    String radom=String.valueOf(r.nextInt(1000000000)); 
     
    fileFileName=date+radom+"."+lastname; 
     
    session.put("fname", fileFileName); 
     
    InputStream is=new FileInputStream(file); 
     
    root= ServletActionContext.getRequest().getRealPath("/upload") ;//存储到apache项目发布目录上 
//    String root="D:\\a1/upload";//存储到项目文件夹里 
     
    session.put("fpath", root); 
    File copyFile=new File(root,fileFileName); 
     
    OutputStream os=new FileOutputStream(copyFile); 
     
    byte[] buffer=new byte[400]; 
     
    int length=0; 
     
    while(    (length=is.read(buffer))    >    0     ){ 
      os.write(buffer, 0, length); 
    } 
     
    is.close(); 
     
    os.close(); 
     
    return SUCCESS; 
  }

 

下载 FileDownAction.java