Java Web desde cero en Netbeans ☁️[19.- JSP Centralizar codigo en packages]
Es este tutorial vamso a centralizar nuestro codigo en los paquetes (packages) para evitar repetir nuestro codigo en todos lados.
Codigo: https://github.com/programadornovato/javaWeb/commit/1d5e57fea127c55c9c731f18664750bf0a1f3df4
package Utils;
import java.math.BigInteger;
import java.security.MessageDigest;
public class Encriptar {
public String getMD5(String input) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] encBytes = md.digest(input.getBytes());
BigInteger numero = new BigInteger(1, encBytes);
String encString = numero.toString(16);
while (encString.length() < 32) {
encString = "0" + encString;
}
return encString;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
<%@page import="java.sql.*"%>
<%@page import="Utils.Encriptar" %>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<title>Usuario</title>
</head>
<body>
<%
HttpSession sesion = request.getSession();
if (sesion.getAttribute("logueado") == null || sesion.getAttribute("logueado").equals("0")) {
response.sendRedirect("login.jsp");
}
Connection con = null;
Statement st = null;
Encriptar enc=new Encriptar();
%>
<div class="container mt-5">
<div class="row">
<div class="col-sm">
<form action="datosUsuario.jsp" method="post">
<div class="form-group">
<label >User</label>
<input type="text" class="form-control" name="user" placeholder="user" value="<%= sesion.getAttribute("user")%>" >
</div>
<div class="form-group">
<label >Password</label>
<input type="text" class="form-control" name="password1" placeholder="password">
</div>
<div class="form-group">
<label >Respita su password</label>
<input type="text" class="form-control" name="password2" placeholder="Repita su password">
</div>
<button type="submit" name="guardar" class="btn btn-primary">Guardar</button>
<a href="index.jsp" class="btn btn-danger">Cancelar</a>
</form>
</div>
</div>
</div>
</body>
<%
if (request.getParameter("guardar") != null) {
String user = request.getParameter("user");
String password1 = request.getParameter("password1");
String password2 = request.getParameter("password2");
if (password1.equals(password2)) {
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/jsp?user=eugenio&password=123456");
st = con.createStatement();
st.executeUpdate("update user set user='" + user + "',password='" + enc.getMD5(password1) + "' where id='" + sesion.getAttribute("id") + "';");
sesion.setAttribute("user", user);
response.sendRedirect("index.jsp");
} catch (Exception e) {
out.print(e);
}
}
else{
out.print("Password no coincide");
}
}
%>
</html>
<%@page import="java.sql.*"%>
<%@page import="Utils.Encriptar" %>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<title>Login</title>
</head>
<body>
<div class="container mt-5">
<div class="row">
<div class="col-sm">
<form method="post" action="login.jsp" >
<div class="form-group">
<label>Usuario</label>
<input type="text" class="form-control" name="user" placeholder="Humano pon tu usuario">
</div>
<div class="form-group">
<label>Password</label>
<input type="password" class="form-control" name="password" placeholder="Humano pon tu password">
</div>
<button type="submit" class="btn btn-primary" name="login" >Login</button>
</form>
<%
Connection con = null;
Statement st = null;
ResultSet rs = null;
Encriptar enc=new Encriptar();
if (request.getParameter("login") != null) {
String user = request.getParameter("user");
String password = request.getParameter("password");
HttpSession sesion = request.getSession();
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/jsp?user=eugenio&password=123456");
st = con.createStatement();
rs = st.executeQuery(" SELECT * FROM `user` where user='" + user + "' and password='" + enc.getMD5(password) + "'; ");
while (rs.next()) {
sesion.setAttribute("logueado", "1");
sesion.setAttribute("user", rs.getString("user"));
sesion.setAttribute("id", rs.getString("id"));
response.sendRedirect("index.jsp");
}
out.print(" <div class=\"alert alert-danger\" role=\"alert\"> Usuario no valido </div>");
} catch (Exception e) {
}
}
%>
</div>
</div>
</div>
</body>
</html>
Curso de Java de 0 a 100: https://www.youtube.com/playlist?list=PLCTD_CpMeEKTT-qEHGqZH3fkBgXH4GOTF
? Esta lista de reproducción: https://www.youtube.com/playlist?list=PLCTD_CpMeEKRAgcBmPee0Wjx5HsJ0nb0L
Codigos en gdrive: https://drive.google.com/file/d/10uLG9o2oDV-qB32G4kMIpzXgLCiUYaYz/view?usp=sharing
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