How to get the file content after uploading file

Question

Hello everyone!
I have a question. Anyone can provide an example code by jsp that getting the uploaded file content after user uploading a file?
Your help is highly appreciated!!!

Answer 1

My experience is you need to do it twice: first read it to a StringBuffer and readline. Then write the file to server. See the code below
MultipartParser parser = new MultipartParser(request, 10000000);
Part part = null;
FilePart filePart = null;
File uploadDir = new File("/Uploads/");
if (!uploadDir.exists()) {
uploadDir.mkdir();
while(true){
     part = parser.readNextPart();
     if(part == null)
          break;
     if(part instanceof FilePart){
          filePart = (FilePart)part;
          filename = filePart.getFilePath();
          //You can do one of the following option. Here is read line to a buffer and display to screen
//if (filename != null) {
          //Do not store the file to server machine.
//long size = filePart.writeTo(uploadDir);
// System.out.println("The number of bytes written is "+size);
          reader = new BufferedReader(new InputStreamReader(filePart.getInputStream()));          
          String newline=reader.readLine();
          if(newline!=null)     {     
          reconcileContent.append("<table border=\"1\"><tr><th>Destination ID</th><th>File ID</th><th>Rept Date</th><th>As of Date</th><th