Upload and Retrieve Word documents

Question

Hai friends .. good Morning to all
I am fresher i need your help ...
Problem What i am Facing:
I upload the file and stored in Mysql ..
steps what i did to upload the file
1) get the uploaded file and write it into the file InputStream
2) using setBinaryStream(inputstramvalue);
3) in mysql that file is stored Blob datatype
Retrieve File
1)i put getBlob("cloumn name " )
getBlob("cloumn name " ) 2)ouput :
com.mysql.jdbc.Blob@9ca1fbtell me how retrieve file display in jsp ..
Please friends help me..

Answer 1

<form action="/UploadAction" enctype="multipart/form-data">
        File : <input type="file" name="excelTemplate"/><br/>
        <input type="submit" name="name" value="upload"/>    
</form>FileFiled.java:
import java.io.InputStream;
import java.net.URLConnection;
public class FileField{
   private InputStream fileFieldInputStream = null;
   private byte fileFieldData[] = null;
   public void setFileFieldInputStream(InputStream fileFleidInputStream){
        this.fileFieldInputStream = fileFieldInputStream;
   public InputStream getFileFliedInputStream(){
        return this.fileFielddInputStream;  
   public void setFileFieldData(byte fileFieldData[]){
        this.fileFieldData = fileFieldData;
   public byte[] getFileFieldData(){
        return this.fileFieldData;
   public String getContentType(){
      String contentType = null;
       try{
          contentType = URLConnection.guessContentTypeFromStream(fileFieldInputStream);
          if(contentType == null)
              contentType = "application/octet-stream";
       }catch(Exception exp){
      return  contentType;
}FileUploadUtils.java:
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.servlet.PortletFileUpload;
public class FileUploadUtils {
     private Map fileItemMap = null;
     private  Map nFileItemMap = null;
     private Object request = null;
     private ProgressListener pl = null;
     private static FileUploadUtils obj = null;
     public FileUploadUtils(Object request)throws Exception{
             this.setRequest(request);                             
             this.fileItemMap = new HashMap();
             this.nFileItemMap = new HashMap();
             this.init(this.getRequest());            
     public FileUploadUtils(Object request,ProgressListener pl)throws Exception{
             this.setRequest(request);
             this.setProgressListener(pl);
             this.fileItemMap = new HashMap();
             this.nFileItemMap = new HashMap(); 
             this.init(this.getRequest());            
     protected void setRequest(Object request){
             this.request = request;
     protected Object getRequest(){
          return this.request; 
     procted void setProgressListener(ProgressListener pl){
          this.pl = pl; 
     public static synchronized FileUploadUtils getInstance(Object request,ProgressListener pl)throws Exception{
              if(obj == null)
                 obj = new  FileUploadUtils(request);
              obj.setProgressListener(pl);
              obj.init(obj.getRequest());  
              return obj; 
     private void init(Object request)throws Exception{
              Class requestClass = Class.forName("javax.servlet.HttpServletRequest");
              if(request instanceof HttpServletRequest){
                 HttpServletRequest req = (HttpServletRequest) request;
                 if(ServletFileUpload.isMultipartContent(req))
                     this.portletMultiPartRequestInit();
              }else if(request instanceof ActionRequest){
                   ActionRequest req = (ActionRequest)request;
                   if(PortletFileUpload.isMultipartContent(req))
                       this.servletMultiPartRequestInit();
     private void servletMultiPartRequestInit() throws Exception{
         DiskFileUpload dfu  = null;
         List fileItems  = null;   
         try{
               // an object which deals with parsing the Multipart request made to the Controller
               ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory());               
               if(pl != null)
                 servletFileUpload.setProgressListener(pl);
               // setting Max file Size
               servletFileUpload.setSizeMax(1000000);
               // parsing the multipart request made 
               fileItems = servletFileUpload.parseRequest(this.request);
                // checking whether the content supplied is multipart content or not & checking whether we have got any elements in the generated list or not    
               if(dfu.isMultipartContent && fileItems != null){
                        Iterator iter =  fileItems.iterator();
                       while (iter.hasNext()) {
                            FileItem item = (FileItem) iter.next();           
                              String fieldName = item.getFieldName(); 
                                    // checking whether the field is a Non-File filed like textbox ,combo box & etc or not                                       
                                    if (!item.isFormField()){
                                        String fieldValue = item.getString();
                                        this.nFileItemMap.put(fieldName, fieldValue);  
                                    }else{
                                       FileField ff = new FileField();
                                       ff.setFileFieldInputStream(item.getInputStream());
                                       ff.setFileFieldData(item.get()); 
                                       this.fileItemMap.put(fieldName,ff);    
                }catch(Exception exp){
                     exp.printStackTrace();
                     System.err.println(exp.getMessage());
                     throw new Exception(exp.getCause());
                } finally{
                   fileItems = null;
                   dfu = null; 
         private void portletMultiPartRequestInit() throws Exception{
            DiskFileUpload dfu  = null;
            List fileItems  = null;   
            try{
               // an object which deals with parsing the Multipart request made to the Controller
               PortletFileUpload portletFileUpload = new ServletFileUpload(new DiskFileItemFactory());               
               if(pl != null)
                 portletFileUpload.setProgressListener(pl);
               // setting Max file Size
               portletFileUpload.setSizeMax(1000000);
               // parsing the multipart request made 
               fileItems = portletFileUpload.parseRequest(this.request);
               // checking whether the content supplied is multipart content or not & checking whether we have got any elements in the generated list or not    
               if(dfu.isMultipartContent && fileItems != null){
                        Iterator iter =  fileItems.iterator();
                       while (iter.hasNext()) {
                            FileItem item = (FileItem) iter.next();           
                              String fieldName = item.getFieldName(); 
                                    // checking whether the field is a Non-File filed like textbox ,combo box & etc or not                                       
                                    if (!item.isFormField()){                                    
                                        String fieldValue = item.getString();
                                        this.nFileItemMap.put(fieldName, fieldValue);  
                                    }else{
                                       FileField ff = new FileField();
                                       ff.setFileFieldInputStream(item.getInputStream());
                                       ff.setFileFieldData(item.get());   
                                       this.fileItemMap.put(fieldName,item);    
                }catch(Exception exp){
                     exp.printStackTrace();
                     System.err.println(exp.getMessage());
                     throw new Exception(exp.getCause());
                } finally{
                   fileItems = null;
                   dfu = null; 
         /** returns a Map of File Field Items*/
         public  Map  getFileFieldMap(){
                return this.getFileFiledsMap;
         /** return a List of Non-File fields*/  
         public Map getNonFileFieldMap(){
               return this.nFileItemMap;
}NOTE: we are ought to include commons-fileupload & commons-io library util libraries for running the above util class.
UploadAction:
public void uploadAction(HttpServletRequest request,HttpServletResponse response)throws Exception{
     FileUploadUtils fuu = new FileUploadUtils(request);
     Map fileItems = fuu.getFileFieldMap();
     Map nFileItems = fuu.getNonFileFieldMap();
     FileField ff = null;
     if(fileItems.get("excelTemplate") != null){
                ff = (FileField)fileItems.get("excelTemplate");
                if(ff.getContentType().equals("application/vnd.ms-excel")){
                    FileUploadDAO fud = FileUploadDAO.getCurrentInstance();
                    fud.addFile(ff.getFileFliedInputStream());   
                }else{
                       throw new Exception("Invalid Data Uploaded");
     }else{
          throw new Exception("An Upload Invalid Request");
}FileUploadDAO.java:
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.sql.SerialBlob;
import java.sql.Blob;
import com.myapp.dao.conn.DbConnectionUtils;
import com.myapp.service.BModelService;
public class FileUploadDAO{
    private static FileUploadDAO fup;
    protected FileUploadDAO(){}
    public static synchronized FileUploadDAO getCurrentInstance(){
          if(fup == null)
             fup = new FileUploadDAO();
          return fup;
   /*Methods to Insert the Uploaded file to the Database*/
   public boolean addFile(InputStream fis,int length){
       Connection con = null;
       PreparedStatement pstmt = null;
       ResultSet rs = null;
       boolean flag = false;
       try{
           String sqlQuery = "insert into file_table (fileBlob) values (?)";
           con = DbConnectionUtils.getConnection();
           pstmt = con.prepareStatement(sqlQuery);
           pstmt.setBinaryStream(1,fis,length);
           int i = pstmt.executeUpdate();
           if(i > 0)
             flag = true;
       }catch(Exception exp){
            exp.printStackTrace();     
       }finally{
           try {      
          if(pstmt != null)                   
             pstmt.close();                
          if(con != null)
                   con.close();                                
       }catch(Exception exp){                   
       }finally {
          pstmt = null;
             con = null;
       return flag;
   public boolean addFile(InputStream fis){
       Connection con = null;
       PreparedStatement pstmt = null;
       ResultSet rs = null;
       boolean flag = false;
       try{
           String sqlQuery = "insert into file_table (fileBlob) values (?)";
           con = DbConnectionUtils.getConnection();
           pstmt = con.prepareStatement(sqlQuery);
           pstmt.setBinaryStream(1,fis);
           int i = pstmt.executeUpdate();
           if(i > 0)
             flag = true;
       }catch(Exception exp){
            exp.printStackTrace();     
       }finally{
           try {      
          if(pstmt != null)                   
             pstmt.close();                
          if(con != null)
                   con.close();                                
       }catch(Exception exp){                   
       }finally {
          pstmt = null;
             con = null;
       return flag;
   public Blob getFileData(String fileId){
       Connection con = null;
       PreparedStatement pstmt = null;
       ResultSet rs = null;
       SerialBlob sb = null;
       try{
           String sqlQuery = "select fileBlob from file_table where fileId = ?";
           con = DbConnectionUtils.getConnection();
           pstmt = con.prepareStatement(sqlQuery);
           pstmt.setString(1,fileId);
           rs = pstmt.executeQuery();
           if(rs.next()){
              Object obj = rs.getObject(1);
               if(obj instanceof Blob)
                  sb = new SerialBlob((Blob)obj);
       }catch(Exception exp){
            exp.printStackTrace();     
       }finally{
           try {      
          if(pstmt != null)                   
             pstmt.close();                
          if(con != null)
                   con.close();                                
       }catch(Exception exp){                   
       }finally {
          pstmt = null;
             con = null;
       return sb;
}Display Action:
public void displayAction(HttpServletRequest request,HttpServletResponse response)throws Exception{
        String fileId = request.getParameter("fid");
        if(fileId == null)
           throw new Exception("Invalid Action Requested");
        FileUploadDAO fud = FileUploadDAO.getCurrentInstance();
        Blob blob = fud.getFileData(fud);
        if(blob == null)
           throw new Exception("No Data Found");
         String mimeType = URLConnection.guessContentTypeFromStream(blob.getBinaryStream());
         if(mimeType == null)
            mimeType = "application/octet-stream";
         response.setContentType(contentType);
         response.setContentLength(blob.length());
          BufferedInputStream input = null;
          BufferedOutputStream output = null; 
          int contentLength = blob.length();
          try{
                 input = new BufferedInputStream(blob.getBinaryStream(),768);
                 output = new BufferedOutputStream(response.getOutputStream(),768);
                while ( contentLength-- > 0 ) {
                                 output.write(input.read());
                 output.flush();
          }catch(Exception exp){
          }finally{
              if(input != null){
                   try{input.close();}catch(Exception exp){}
              if(output != null){
                   try{output.close();}catch(Exception exp){}
}now in order display it on to a JSP here is how you can render the content.
<iframe src="displayActionUrlPattern?fid=2345ab"/>Hope the discussed example above might be of some help :)
REGADS,
RaHuL