哪位给个jsp上传文件的例子，这里先谢谢了！__getFormNameIndex_buffer_int_pos_filename_

当前位置: 技术问答>java相关

哪位给个jsp上传文件的例子，这里先谢谢了！

来源: 互联网发布时间：2015-06-24

本文导语: 请尽量详细些 | 很多人用jspsmartUpload： http://www.jspsmart.com/ 有javaBean类文件下载和例子演示 | 上载： public void uploadFile(javax.servlet.http.HttpServletRequest req) throws IOException,Except...

请尽量详细些

很多人用jspsmartUpload：
http://www.jspsmart.com/ 有javaBean类文件下载和例子演示

上载：
public void uploadFile(javax.servlet.http.HttpServletRequest req) throws IOException,Exception {
     try {
        String contentType=req.getContentType();
        int contentLength=req.getContentLength();
        java.io.DataInputStream bis=new java.io.DataInputStream(req.getInputStream());
        int once = 0;
        int total = 0;
        byte[] buffer=new byte[contentLength];
        while ((total=0)) {
          once = bis.read(buffer,total,contentLength);
          total += once;
        }
        int boundaryStart=contentType.indexOf("boundary=");
        boundaryStart=boundaryStart+"boundary=".length();
        String boundary="--"+contentType.substring(boundaryStart);
        int pos=getFormNameIndex(buffer,"filename="".getBytes(),1)+"filename="".length();
        int posEnd=getFormNameIndex(buffer,""".getBytes(),pos);
        String filename=new String(buffer,pos,posEnd-pos);
        pos=filename.lastIndexOf(".");
        String filenames=System.currentTimeMillis()/1000+filename.substring(pos);
        pos=getFormNameIndex(buffer,"Content-Type: ".getBytes(),1);
        pos=getFormNameIndex(buffer,"rn".getBytes(),pos+1)+4;
        int endpos=getFormNameIndex(buffer,boundary.getBytes(),pos+20);
        int len=endpos-pos;
        java.io.DataOutputStream bos= new java.io.DataOutputStream(new java.io.FileOutputStream(new java.io.File(filepath,filenames)));
        bos.write(buffer,pos,len);
        bis.close();
        bos.close();
     }catch(Exception exc) {
        throw new Exception("upload failed.");
     }finally{

     }
  }
  private int getFormNameIndex(byte[] source,byte[] formname,int start) {
      int soulen=source.length;
      int sealen=formname.length;
      boolean hasSearch=false;
      int pos=-1;
      for(int i=start;i