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Saturday, 2 December 2017

Hoe to upload a file on website unsig java jsp programming

Learning Java Programming Made Easy

HTML/JSP View File:

<%-- 
    Document   : upload
    Created on : Feb 14, 2017, 12:25:46 PM
    Author     : my pc
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE html>

<html>

<body>

Select a file to upload: <br />

<form action="uploadtarget.jsp" method="post" enctype="multipart/form-data">

<input type="file" name="file" size="50" />

<br />

<input type="submit" value="Upload File" />

</form>

</body>

</html>

/**********************************************************/

JSP Controller File:     uploadtarget.jsp

<%-- 
    Document   : uploadtarget'
    Created on : Feb 14, 2017, 12:26:40 PM
    Author     : my pc
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%@page import="java.io.*,java.util.*,javax.servlet.*" %>
<%@ page import="javax.servlet.http.*" %>
<%@ page import="org.apache.commons.fileupload.*" %>
<%@ page import="org.apache.commons.fileupload.disk.*" %>
<%@ page import="org.apache.commons.fileupload.servlet.*" %>
<%@ page import="org.apache.commons.io.output.*" %>
<%
   File file ;
   int maxFileSize = 5000 * 1024;
   int maxMemSize = 5000 * 1024;
   String filePath = "c:/apache-tomcat/webapps/data/";

   String contentType = request.getContentType();
   if ((contentType.indexOf("multipart/form-data") >= 0)) {

      DiskFileItemFactory factory = new DiskFileItemFactory();
      factory.setSizeThreshold(maxMemSize);
      factory.setRepository(new File("c:\\temp"));
      ServletFileUpload upload = new ServletFileUpload(factory);
      upload.setSizeMax( maxFileSize );
      try{ 
         List fileItems = upload.parseRequest(request);
         Iterator i = fileItems.iterator();
         out.println("<html>");
         out.println("<body>");
         while ( i.hasNext () ) 
         {
            FileItem fi = (FileItem)i.next();
            if ( !fi.isFormField () )  {
                String fieldName = fi.getFieldName();
                String fileName = fi.getName();
                boolean isInMemory = fi.isInMemory();
                long sizeInBytes = fi.getSize();
                file = new File( filePath + "yourFileName") ;
                fi.write( file ) ;
                out.println("Uploaded Filename: " + filePath + fileName + "<br>");
            }
         }
         out.println("</body>");
         out.println("</html>");
      }catch(Exception ex) {
         System.out.println(ex);
      }
   }else{
      out.println("<html>");
      out.println("<body>");
      out.println("<p>No file uploaded</p>"); 
      out.println("</body>");
      out.println("</html>");
   }
%>

How to use auto refresh using java jsp program code

Learning Java Programming Made Easy

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE html>

<%@ page import="java.io.*,java.util.*;" %>

<html>

<body>

<%

   response.setIntHeader("Refresh", 1);

   Calendar calendar = new GregorianCalendar();

   String am_pm;

   int hour = calendar.get(Calendar.HOUR);

   int minute = calendar.get(Calendar.MINUTE);

   int second = calendar.get(Calendar.SECOND);

   if(calendar.get(Calendar.AM_PM) == 0)

      am_pm = "AM";

   else

      am_pm = "PM";

   String CT = hour+":"+ minute +":"+ second +" "+ am_pm;

   out.println( CT + "\n");

%>

</body>

</html>

How to use if loop in java programming

Learning Java Programming Made Easy

import java.io.*
import java.util.*

public class ifloop
{
public static void main(String args[])
{
int x;
Scanner sc=new Scanner(System.in);
System.out.println("Enter 1 or 2");
x=sc.nextInt();
if(x==1)
{
System.out.println("Well Done...! You Entered x="+x);
}
elseif(x==2)
{
System.out.println("Congrats...! You Entered x="+x);
}
else
{
System.out.println("Sorry...! Invalid Numbar");
}
}
}

How to use for loop in java program

Learning Java Programming Made Easy

import java.io.*;
import java.util.*;

public class forloop
{
public static void main(String args[])
{
int x,y;
Scanner sc=new Scanner(System.in);
System.out.println("Enter the maximum count");
y=sc.nextInt();
for(x=0;x<y;x++)
{
System.out.println("x="+x);
}
}
}

How to use Do-While loop in java

Learning Java Programming Made Easy

import java.io.*;
import java.util.*;

public class do_while
{
public static void main(String args[])
{
int x=0;
do
{
x=x+1;
System.out.println("x="+x);
}
while(x!=10);
}
}

Tuesday, 28 February 2017

How to use java code for type casting

//********************************Start**************************

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package javaapplication1;

/**
*
* @author HP
*/
public class Java_Type_Casting {
public static void main(String args[])
{

byte b;
int i = 257;
double d = 323.142;

System.out.println("Conversion of int to byte.");
b = (byte) i;
System.out.println("i is " + i + " and b is " + b);

System.out.println("\nConversion of double to int.");
i = (int) d;
System.out.println("d is " + d + " and i is " + i);

System.out.println("\nConversion of double to byte.");
b = (byte) d;
System.out.println("d is " + d + " and b is " + b);

}
}

//********************************End***************************

How to use Java Code for Login Form design

//*****************************Start************************

import java.awt.*;
import javax.swing.*;
/**
*
* @author HP
*/
public class AWT_Login_From {
JFrame f;
JPanel jp;
JLabel heading,username,password,forgetpass;
JTextField tuser;
JPasswordField pass;
JButton login,reset;

public AWT_Login_From()
{
f=new JFrame("Login Form");
f.setSize(400,300);
f.setVisible(true);
f.setLocation(500, 250);
f.setResizable(false);
jp=new JPanel();
jp.setLayout(null);
f.add(jp);

heading=new JLabel("Login Form");
heading.setBounds(150, 20, 150, 50);
jp.add(heading);

username=new JLabel("USER NAME");
username.setBounds(60, 100, 80, 10);
jp.add(username);

password=new JLabel("PASSWORD");
password.setBounds(60, 150, 80, 10);
jp.add(password);

forgetpass=new JLabel("Forget Password");
forgetpass.setBounds(210, 170, 100, 10);
jp.add(forgetpass);

tuser=new JTextField("");
tuser.setBounds(140,95,170,25);
jp.add(tuser);

pass=new JPasswordField();
pass.setBounds(140,145,170,25);
jp.add(pass);

login=new JButton("Login");
login.setBounds(60,205,100,25);
jp.add(login);

reset=new JButton("Reset");
reset.setBounds(240,205,100,25);
jp.add(reset);

}
public static void main(String args[])
{
AWT_Login_From lf=new AWT_Login_From();

}
}

//*****************************End*************************

How to use Java Code to Print 1 to 45 In Triangle Shape...

//*************************Start**************************

public class Print_1_TO_45_In_Triangle
{
public static void main(String args[])
{
int n=1, i, j;
for(i=0; i<10; i++)
{
for(j=0; j<i; j++)
{
if(0<n&&n<10)
{
System.out.print("0");
}

System.out.print(n + " ");
n++;
}
System.out.println();
}
}
}

//*************************ENd**************************

How to use Java for ShutDown Computer From using Code

//******************Start**************************

import java.io.*;

/**
*
* @author HP
*/
public class Shut_Down_Computer {
public static void main(String args[]) throws IOException
{
Runtime runtime = Runtime.getRuntime();
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.print("Enter No. of Seconds after which You want your Computer to Shutdown :");
long a=Long.parseLong(br.readLine());

Process proc = runtime.exec("shutdown -s -t " +a);

System.exit(0);
}
}

//******************End***************************

How to use Java Code Example for Try-Catch Function to Get Exception Error

//**************************Start***************************

import java.util.*;

/**
*
* @author HP
*/
public class try_catch {

public static void main(String args[]) {
int i, j;
Scanner sc = new Scanner(System.in);
System.out.println("Enter any 2 no.");
i = sc.nextInt();
j = sc.nextInt();
try {
int result = i / j;
System.out.println("Result= " + result);
}

catch (Exception es) {
System.err.println(es.getMessage());
}
}
}

//**************************End***************************