Program 1
package dataflair;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.*;
public class LoginServlet extends HttpServlet
{
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet LoginServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet LoginServlet at " + request.getContextPath() + "</h1>");
out.println("</body>");
out.println("</html>");
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
PrintWriter out=response.getWriter();
out.println("Welcome to my Do Get Method");
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
PrintWriter out=response.getWriter();
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
try
{
Class.forName("com.mysql.jdbc.Driver");
out.println("Driver load successfully..........");
}
catch(ClassNotFoundException e)
{
out.println(e);
}
try
{
con = DriverManager.getConnection("jdbc:mysql://localhost/dataflair", "root", "root@data");
out.println("Database connection done successfully..........");
String user,pass;
user=request.getParameter("txtuser");
pass=request.getParameter("txtpass");
String sql;
sql="select * from emplogin where userid=? and password=?";
ps=con.prepareStatement(sql);
ps.setString(1, user);
ps.setString(2, pass);
rs=ps.executeQuery();
if(rs.next())
response.sendRedirect("user.html");
else
response.sendRedirect("index.html");
}
catch(SQLException e)
{
out.println(e);
}
}
@Override
public String getServletInfo()
{
return "Short description";
}// </editor-fold>
}
