jnext development

Image Upload Using servlet /Store image in data base

Image (Photo) Upload Using Java Servlet and JSP


Please Download below jar File:

• commons-fileupload-1.2.2.jar
• commons-io-2.5-20121102.152256-3.jar

Java Class: UploadFile .class

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class UploadFile extends HttpServlet {

private static final String upload="upload";
private static final int thread =1024*1024*3;
private static final int filesize=1024*1024*40;
private static final int reqsize=1024*1024*50;

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {


if(!ServletFileUpload.isMultipartContent(req)){
System.out.println(" please select file ");
}
else{
DiskFileItemFactory factory= new DiskFileItemFactory();
factory.setSizeThreshold(thread);
factory.setRepository(new File(System.getProperty("java.io.temdir")));

ServletFileUpload fileUpload= new ServletFileUpload(factory);
fileUpload.setSizeMax(reqsize);
fileUpload.setFileSizeMax(filesize);

String path=getServletContext().getRealPath("")+File.separator+upload;


File file= new File(path);

if(!file.exists()){
file.mkdir();
}
try{
List list=fileUpload.parseRequest(req);
Iterator  iter=list.iterator();

// iterates over form's fields
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
// processes only fields that are not form fields
if (!item.isFormField()) {

String fileName = new File(item.getName()).getName();
String filePath =upload+File.separator+fileName;
File storeFile = new File(filePath);

// saves the file on disk
item.write(storeFile);
}
}

}
catch (Exception e) {
// TODO: handle exception
}


}
}
}



JSP Page: index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

select File :








web.xml



  UploadFile

 
  index.jsp
 
 
 
  uplaod
  Uploadfile
 
 
 
  uplaod
  /upload
 

how to send multiple image by using java Bluetooth

Send File Multiples Device

Download List Of Jar File:

• bluecover-2.1.1
• commons-io-1.3.2

Now create Couple of java class.

1)UI Class:

public class UIDemo extends JDialog implements ActionListener{

private JTextArea jTextArea;

private JList jList;

private DialogListener listener;

private Object[] items;

private JLabel statusLabel;

private static JFileChooser fileChooser = new JFileChooser();

public MyDialog(String title, Object [] items , DialogListener listener ) {

super.setTitle(title);

this.listener = listener;

this.setSize(500,300);

jList = new JList();

if(items==null){

items = new Object[0];

}

jList.setListData(items);

this.items = items;

JScrollPane jScrollPane = new JScrollPane(jList);

jScrollPane.setSize(255,5);

this.getContentPane().setLayout(new BorderLayout());

this.getContentPane().add(jScrollPane,BorderLayout.WEST);

jTextArea = new JTextArea("Enter message ");

this.getContentPane().add(jTextArea,BorderLayout.CENTER);

JButton ffile= new JButton("Browse");

ffile.addActionListener(this);

this.getContentPane().add(ffile,BorderLayout.EAST);

JButton jButton = new JButton("Send");

jButton.addActionListener(this);

this.getContentPane().add(jButton,BorderLayout.SOUTH);

statusLabel = new JLabel("Started");

fileChooser.setMultiSelectionEnabled(true);

        fileChooser.setCurrentDirectory(new File("path (D:/jnext/.....)"));

        fileChooser.setBounds(50,50,400,400);

        

this.getContentPane().add(statusLabel,BorderLayout.NORTH);

setLocationRelativeTo(null);

setDefaultCloseOperation(DISPOSE_ON_CLOSE);

this.show();

}

public void addItem(Object item){

Object [] newitems = new Object[items.length+1];

for (int i = 0; i < items.length; i++) {

newitems[i] = items[i];

}

newitems[newitems.length-1] =item;

items = newitems;

jList.setListData(newitems);

}

public void setStatus(String text){

statusLabel.setText(text);

}

@Override

public void actionPerformed(ActionEvent e) {

if(e.getActionCommand().equals("Send")){

Object [] selectedItems = jList.getSelectedValues();

String message = jTextArea.getText();

Point a=fileChooser.getLocation();

File f=fileChooser.getSelectedFile();

System.out.println(f.getAbsolutePath()+" path :");

System.out.println(" first file");

System.out.println("project data "+a);

listener.sendPressed(selectedItems, f.getAbsolutePath(),this);

}

else{

fileChooser.showDialog(null,

                    "File Chooser");

}

}

public interface DialogListener{

public void sendPressed(Object [] selectedItems, String message,MyDialog dialog);

}

}

2) BTDevice  :

public class BTDevice {

private String name;

private String BTURL;

public BTDevice(String name,String BTURL) {

this.name=name;

this.BTURL=BTURL;

}

@Override

public String toString() {

return name;

}

public String getBTURL() {

return BTURL;

}

}

3)BTMessageSender class :

public class BTMessageSender {

public static boolean  sendMessage(String deviceBTURL, String message, MyDialog dialog){

// we assume that the given device already has the service

try{

System.out.println("Connecting to " + deviceBTURL);

dialog.setStatus("Connecting to " + deviceBTURL);

ClientSession clientSession = 

(ClientSession) Connector.open(deviceBTURL);

 HeaderSet hsConnectReply = clientSession.connect(null);

if (hsConnectReply.getResponseCode() != ResponseCodes.OBEX_HTTP_OK) {

           System.out.println("Failed to connect");

           dialog.setStatus("Failed to connect");

           return false;

     }

 

HeaderSet hsOperation = clientSession.createHeaderSet();

 

    hsOperation.setHeader(HeaderSet.NAME, "jnext.text");

    hsOperation.setHeader(HeaderSet.TYPE, "text");

    

    Operation putOperation = clientSession.put(hsOperation);

    

    // 4. send the data to the device

    File f= new File(message);

    

    InputStream is= new FileInputStream(f);

    byte bk[]=IOUtils.toByteArray(is);

   

   // File imgPath = new File(ImageName);

    BufferedImage bufferedImage = ImageIO.read(f);

    // get DataBufferBytes from Raster

    WritableRaster raster = bufferedImage .getRaster();

    DataBufferByte data   = (DataBufferByte) raster.getDataBuffer();

   

     // text message    

 //   byte arydata[] = message.getBytes("iso-8859-1");

    byte arydata[] =data.getData();

    System.out.println(" total size "+arydata.length);

        OutputStream os = putOperation.openOutputStream();

        os.write(bk);

        os.close();

        putOperation.close();

        clientSession.disconnect(null);

        clientSession.close();

}

catch (Exception e) {

e.printStackTrace();

return false;

}

return true;

}

}

4)BTServicesSearcher  class :

public class BTServicesSearcher {

static String tempDeviceName;

private static MyDialog dialog;

private static RemoteDeviceDiscoverer remoteDeviceDiscoverer;

    static final UUID OBEX_OBJECT_PUSH = new UUID(0x1105);

    public static final Vector serviceFound = new Vector();

    public static void main(String[] args) throws IOException, InterruptedException {

   

    dialog = new MyDialog("Bluetooth multi-sender",null, new DevicesDialogListener());

    remoteDeviceDiscoverer = new RemoteDeviceDiscoverer();

   

        // First run RemoteDeviceDiscovery and use discovered device

    dialog.setStatus("Searching devices, please wait..");

    remoteDeviceDiscoverer.searchDevices();

        serviceFound.clear();

        

        UUID serviceUUID = OBEX_OBJECT_PUSH;

        if ((args != null) && (args.length > 0)) {

            serviceUUID = new UUID(args[0], false);

        }

        final Object serviceSearchCompletedEvent = new Object();

        DiscoveryListener listener = new DiscoveryListener() {

            public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {

           

            }

            public void inquiryCompleted(int discType) {

            }

            public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {

           

           

                for (int i = 0; i < servRecord.length; i++) {

               

                    String url = servRecord[i].getConnectionURL(ServiceRecord.AUTHENTICATE_NOENCRYPT, false);

                    if (url == null) {

                        continue;

                    }

                    serviceFound.add(url);

                    DataElement serviceName = servRecord[i].getAttributeValue(0x0100);

                    if (serviceName != null) {

                        System.out.println("service " + serviceName.getValue() + " found " + url);

                    } else {

                        System.out.println("service found " + url);

                    }

                    

                    dialog.addItem(new BTDevice(tempDeviceName,url));

                }

            }

            public void serviceSearchCompleted(int transID, int respCode) {

                System.out.println("service search completed!");

                synchronized(serviceSearchCompletedEvent){

                    serviceSearchCompletedEvent.notifyAll();

                }

            }

        };

        UUID[] searchUuidSet = new UUID[] { serviceUUID };

        int[] attrIDs =  new int[] {

                0x0100 // Service name

        };

        int size = remoteDeviceDiscoverer.getDevicesDiscovered().size();

        dialog.setStatus(size + " devices found. Now checking which is supported.");

        for(Enumeration en = remoteDeviceDiscoverer.getDevicesDiscovered().elements(); en.hasMoreElements(); ) {

            RemoteDevice btDevice = (RemoteDevice)en.nextElement();

            synchronized(serviceSearchCompletedEvent) {

                String friendlyName = "";

                try{

               friendlyName = btDevice.getFriendlyName(false);

               

               tempDeviceName = friendlyName;

                }

                catch (Exception e) {

                    System.out.println("(dont know the name)");

                    tempDeviceName = null;

                }

                System.out.println("search services on " + btDevice.getBluetoothAddress() + " " + friendlyName);

                

                LocalDevice.getLocalDevice().getDiscoveryAgent().searchServices(attrIDs, searchUuidSet, btDevice, listener);

                serviceSearchCompletedEvent.wait();

            }

        }

        

        dialog.setStatus("Search finished. Send a message");

        

    }

}

5)DevicesDialogListener  class :

public class DevicesDialogListener implements DialogListener {

@Override

public void sendPressed(Object[] selectedItems, String message,MyDialog dialog) {

System.out.println(""+message);

for (Object item : selectedItems) {

BTMessageSender.sendMessage(((BTDevice)item).getBTURL(),message, dialog);

}

}

}

6)RemoteDeviceDiscoverer  class :

public class RemoteDeviceDiscoverer {

    private final Vector devicesDiscovered = new Vector();

public void searchDevices() throws IOException, InterruptedException {

        final Object inquiryCompletedEvent = new Object();

        devicesDiscovered.clear();

        DiscoveryListener listener = new DiscoveryListener() {

            public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {

                System.out.println("Device " + btDevice.getBluetoothAddress() + " found");

                devicesDiscovered.addElement(btDevice);

                try {

                    System.out.println("     name " + btDevice.getFriendlyName(false));

                } catch (IOException cantGetDeviceName) {

                }

            }

            public void inquiryCompleted(int discType) {

                System.out.println("Device Inquiry completed!");

                synchronized(inquiryCompletedEvent){

                    inquiryCompletedEvent.notifyAll();

                }

            }

            public void serviceSearchCompleted(int transID, int respCode) {

            }

            public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {

            }

        };

        synchronized(inquiryCompletedEvent) {

            boolean started = LocalDevice.getLocalDevice().getDiscoveryAgent().startInquiry(DiscoveryAgent.GIAC, listener);

            if (started) {

                //wait for device inquiry to complete

                inquiryCompletedEvent.wait();

                System.out.println(devicesDiscovered.size() +  " device(s) found");

               

            }

        }

    }

    public Vector getDevicesDiscovered() {

return devicesDiscovered;

}

    

}

Note: Application start on UI class. 

How to connect java to mysql server by using jdbc

Java With Mysql Database connectivity
try {
Class.forName("com.mysql.jdbc.Driver");
Connection connection=DriverManager.getConnection("jdbc:mysql://localhost:3306","root","root");
System.out.println("welcome to jnext : mysql database connect: "+connection);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

contace me :ghorivipul97@gmail.com

How to use Data picker in jsp page

contace me :ghorivipul97@gmail.com

How to use session in java

Login With Java Session /How Use session object in java ???
public class CheckLogin {
public void checkValid(UserDetail bean){

String sql="SELECT * FROM tablename WHERE user=?";

Connection con=DBcon.getConnection(); //singleton database object

try {
PreparedStatement pstm=con.prepareStatement(sql);
pstm.setInt(1,"jnext");//username
ResultSet rs=pstm.executeQuery(); //execute query
if(rs.next()){
System.out.println("WEL-COME jnext Development : ");
HttpSession session=req.getSession(true); // session start for new user
session.setAttribute("ky", "jnext"); // set user name on session scope
RequestDispatcher rd;
rd=req.getRequestDispatcher("abc.jsp"); // redirect after login page
rd.forward(req, resp);
}
} catch (SQLException e) {
System.out.println("sql exception please check sql query");
e.printStackTrace(); //print exception
}
}
}
}

contace me :ghorivipul97@gmail.com

Array Index out of bound Exception

import java.util.ArrayList;
public class Jnext_Demo {

public static void main(String[] args) {


ArrayList data= new ArrayList();
//now ADD data in array list  2 string insert  in array list
data.add("java");  // 0 index
data.add("android"); // 1 index


// now Display data  with  index 3

System.out.println(data.get(3));


}
}
Check screen short for java class.

Output Screen 

IF you have more Query ,Write comment blow