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11.19.2013

In by // 11/19/2013 06:00:00 PM // Leave a Comment

Create basic servlet which take input from user and display that on browser. (Contains 4 pages)

Login.java 

 
package View; 
import java.io.*; 
import java.net.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
 
public class login extends HttpServlet { 
    
    protected void processRequest(HttpServletRequest request, HttpServletResponse 
response) 
    throws ServletException, IOException { 
        response.setContentType("text/html;charset=UTF-8"); 
        PrintWriter out = response.getWriter(); 
        try { 
             
            out.println("<html>"); 
            out.println("<head>"); 
            out.println("<title>Login Page</title>");   
            out.println("</head>"); 
            out.println("<body>"); 
            out.println("<form action='Check' method='get'>"); 
            out.println("<h3> Username </h3>"); 
            out.println("<input type ='text' name='u_name'>"); 
            out.println("<br>"); 
            out.println("<h3> Password </h3>"); 
            out.println("<input type ='password' name='pwd'>"); 
            out.println("<br>"); 
            out.println("<select>"); 
            out.println("<option value='CSE'>Computer Science and 
Engineering</option>"); 
            out.println("<option value='ECE'>Electronics and 
Commnunication</option>"); 
            out.println("<option value='ME'>Mechanical</option>"); 
            out.println("<option value='IC'>Instrumentation and Control</option>"); 
            out.println("</select>"); 
            out.println("</body>"); 
            out.println("</html>"); 
            out.println("<input type ='submit' value='Login'>"); 
            out.println("</form>"); 
             
        } finally {  
            out.close(); 
        } 
    }  
 
  protected void doGet(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    }  

  protected void doPost(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    } 
 
    public String getServletInfo() { 
        return "Short description"; 
    } 
}

 Register.java 

 
package View; 
 
import java.io.*; 
import java.net.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
 
public class Register extends HttpServlet { 
    protected void processRequest(HttpServletRequest request, HttpServletResponse 
response) 
    throws ServletException, IOException { 
        response.setContentType("text/html;charset=UTF-8"); 
        PrintWriter out = response.getWriter(); 
        try { 
            out.println("<html>"); 
            out.println("<head>"); 
            out.println("<title>Registration Page</title>");   
            out.println("</head>"); 
            out.println("<body>"); 
            out.println("<form action='Display' method='get'>"); 
            out.println("Name:"); 
            out.println("<input type ='text' name = 'name'>"); 
            out.println("Last Name:"); 
            out.println("<input type ='text' name = 'lname'>"); 
            out.println("Phone Number"); 
            out.println("<input type ='text' name = 'pnumber'>"); 
            out.println("<input type ='radio' name = 'gender' value = 'Male'>Male"); 
            out.println("<input type ='radio' name = 'gender' value = 
'Female'>Female"); 
            out.println("<select name = 'course'>"); 
            out.println("<option value='Computer Science and Engineering'>Computer 
Science and Engineering</option>"); 
            out.println("<option value='Electronics and Commnunication'>Electronics 
and Commnunication</option>"); 
            out.println("<option value='Mechanical Engineering'>Mechanical</option>"); 
            out.println("<option value='Instrumentation and Control'>Instrumentation 
and Control</option>"); 
            out.println("</select>"); 
            out.println("<input type = 'submit' value ='Register'>"); 
            out.println("</form>");              
            out.println("</body>"); 
            out.println("</html>")   
        } finally {  
            out.close(); 
        } 
    }  
 
protected void doGet(HttpServletRequest request, HttpServletResponse response) 

    throws ServletException, IOException { 
        processRequest(request, response); 
    }      
protected void doPost(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    }     
    public String getServletInfo() { 
        return "Short description"; 
    } 
}

 Display.java 

 
package View; 
 
import java.io.*; 
import java.net.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
 
public class Display extends HttpServlet  
{    
    protected void processRequest(HttpServletRequest request, HttpServletResponse 
response) 
    throws ServletException, IOException  
    { 
        response.setContentType("text/html;charset=UTF-8"); 
        PrintWriter out = response.getWriter(); 
        try { 
              String name = request.getParameter("name"); 
              String lname = request.getParameter("lname"); 
              String phone = request.getParameter("pnumber"); 
              String gender = request.getParameter("gender"); 
              String course = request.getParameter("course"); 
              out.println("<html>"); 
              out.println("<head>"); 
              out.println("<title>Info Display</title>");   
              out.println("</head>"); 
              out.println("<body>"); 
              out.println("<b>Name:</b>"); 
              out.println(name); 
              out.println("<br>"); 
              out.println("<b>Last Name:</b>"); 
              out.println(lname); 
              out.println("<br>"); 
              out.println("<b>Phone Number:</b>"); 
              out.println(phone); 
              out.println("<br>"); 
              out.println("<b>Gender:</b>"); 
              out.println(gender); 
              out.println("<br>"); 
              out.println("<b>Department:</b>"); 
              out.println(course); 
              out.println("<br>"); 
              out.println("</body>"); 
              out.println("</html>"); 
             }  
          finally {  
            out.close(); 
        } 
    }      
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException 
  { 
          processRequest(request, response); 
      }  
    protected void doPost(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException 
  { 
          processRequest(request, response); 
      } 
    public String getServletInfo() 
  { 
         return "Short description"; 
      } 
    }

Error.java 

 
package View; 
 
import java.io.*; 
import java.net.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
 
public class Error extends HttpServlet  
{ 
    protected void processRequest(HttpServletRequest request, HttpServletResponse 
response) 
    throws ServletException, IOException { 
        response.setContentType("text/html;charset=UTF-8"); 
        PrintWriter out = response.getWriter(); 
        try { 
           
            out.println("<html>"); 
            out.println("<head>"); 
            out.println("<title>Error Page</title>");   
            out.println("</head>"); 
            out.println("<body>"); 
            out.println("<form action='login'"); 
            out.println("<h1>Something Was Wrong with your Username of 
Password</h1>"); 
            out.println("<br>"); 
            out.println("<input type ='submit' value='Go Back'"); 
            out.println("</body>"); 
            out.println("</html>"); 
        } finally {  
            out.close(); 
        } 
    }  
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    }  
    protected void doPost(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    } 
    public String getServletInfo() { 
        return "Short description"; 
    } 
  } 

Check.java 

 
package Controller; 
 
import java.io.*; 
import java.net.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
 
public class Check extends HttpServlet { 
    
    protected void processRequest(HttpServletRequest request, HttpServletResponse 
response) 
    throws ServletException, IOException { 
        response.setContentType("text/html;charset=UTF-8"); 
        PrintWriter out = response.getWriter(); 
         
        try { 
            String name = request.getParameter("u_name"); 
            String password = request.getParameter("pwd"); 
             
            if(name.isEmpty() && password.isEmpty()) 
            { 
                response.sendRedirect("Error"); 
            } 
            else 
            { 
                response.sendRedirect("Register"); 
            } 
            
        } finally {  
            out.close(); 
        } 
    }  
  
   protected void doGet(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    }  
 
  protected void doPost(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException { 
        processRequest(request, response); 
    }   
    public String getServletInfo() { 
        return "Short description"; 
    }
}

Location: India

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