backend 1.1

backend/Controller/Consultas.java

@@ -1,3 +0,0 @@
-public class Consultas {
-    
-}

backend/src/main/java/mx/uv/App.java

@@ -2,27 +2,63 @@ package mx.uv;
 import static spark.Spark.*;
 
 import java.util.HashMap;
-import java.util.UUID;
 
 import  com.google.gson.*;
+
+import mx.uv.Controller.DAO;
+import mx.uv.Model.*;
+
 public class App 
 {
+    static Gson gson = new Gson();
+    static HashMap<String, Alumno> usuarios = new HashMap<>();
     public static void main( String[] args )
     {
-        System.out.println( "Hello World!" );
+        //fuente:https://gist.github.com/saeidzebardast/e375b7d17be3e0f4dddf
-        //port(80);
+        options("/*",(request,response)->{
+            String accessControlRequestHeaders=request.headers("Access-Control-Request-Headers");
+            if(accessControlRequestHeaders!=null){
+                response.header("Access-Control-Allow-Headers",accessControlRequestHeaders);
+            }
+            String accessControlRequestMethod=request.headers("Access-Control-Request-Method");
+            if(accessControlRequestMethod!=null){
+                response.header("Access-Control-Allow-Methods",accessControlRequestMethod);
+                }
+            return "OK";
+        });
 
-        get("/usuarios", (request, response) ->{
+        before((request,response)->response.header("Access-Control-Allow-Origin","*"));
+
+        get("/TodosLosAlumnos", (request, response) ->{
             response.type("application/json");
-            JsonObject respuesta = new JsonObject();
+            return gson.toJson(DAO.dameUsuarios());
-            respuesta.addProperty("msj", "hola");
-            return respuesta;
         });
-        post("/usuarios", (request, response) ->{
+        post("/agregarAlumno", (request, response) ->{
             String payload = request.body();
+            Alumno alumno = gson.fromJson(payload, Alumno.class);
+
+            boolean msj = DAO.agregarAlumno(new Alumno("Pedro","Lazaro","Mexicano","SAKHBD197", "PezGato"));
             JsonObject respuesta = new JsonObject();
-            respuesta.addProperty("msj", "");
+            respuesta.addProperty("msj", msj);
             return respuesta;
         });
+        put("/EditarAlumno", (request, response) ->{
+            String payload = request.body();
+            Alumno alumno = gson.fromJson(payload, Alumno.class);
+            boolean verificado = DAO.editarAlumno(alumno);
+            JsonObject respuesta = new JsonObject();
+            respuesta.addProperty("existe", verificado);
+            return respuesta;
+        });
+        delete("/EliminarAlumno", (request, response) ->{
+            String payload = request.body();
+            Alumno alumno = gson.fromJson(payload, Alumno.class);
+            boolean verificado = DAO.eliminarAlumno(alumno);
+            JsonObject respuesta = new JsonObject();
+            respuesta.addProperty("existe", verificado);
+            return respuesta;
+        });
+        
+
     }
 }

backend/src/main/java/mx/uv/Controller/Conexion.java

@@ -0,0 +1,56 @@
+package mx.uv.Controller;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.logging.Logger;
+
+public class Conexion {
+     
+    private static Connection conexion;
+    private static Conexion instancia;
+    private static final String url = "jdbc:mysql://localhost:3306/universidad";
+    private static final String user = "root";
+    private static final String password = "Perro16tonto";
+    private static final Logger logger = Logger.getLogger(Conexion.class.getName());
+
+    private Conexion() {}
+
+    public static Conexion getInstance() {
+        if (instancia == null) {
+            synchronized (Conexion.class) {
+                if (instancia == null) {
+                    instancia = new Conexion();
+                }
+            }
+        }
+        return instancia;
+    }
+
+    public Connection conectar() {
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            conexion = DriverManager.getConnection(url, user, password);
+            if (conexion != null) {
+                logger.info("Conexión exitosa");
+                return conexion;
+            } else {
+                logger.severe("ERROR: No se pudo conectar");
+            }
+        } catch (Exception e) {
+            logger.severe("ERROR: " + e.getMessage());
+        }
+        return null;
+    }
+
+    public void cerrarConexion() {
+        try {
+            if (conexion != null && !conexion.isClosed()) {
+                conexion.close();
+                logger.info("Se desconectó de la base de datos");
+            }
+        } catch (SQLException e) {
+            logger.severe("ERROR: " + e.getMessage());
+        }
+    }
+}

backend/src/main/java/mx/uv/Controller/DAO.java

@@ -0,0 +1,124 @@
+package mx.uv.Controller;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+
+
+import mx.uv.Model.Alumno;
+
+public class DAO {
+    private static Conexion cn = Conexion.getInstance();
+
+    public static List<Alumno> dameUsuarios() {
+        Statement stm = null;
+        ResultSet rs = null;
+        Connection conn = null;
+        List<Alumno> resultado = new ArrayList<>();
+
+        conn = cn.conectar();
+
+        try {
+            String sql = "SELECT * from alumno";
+            stm = conn.createStatement();
+            rs = stm.executeQuery(sql);
+            while (rs.next()) {
+                Alumno u = new Alumno(rs.getInt(1), rs.getString(2), rs.getString(3),rs.getString(4), rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8));
+                resultado.add(u);
+            }
+        } catch (Exception e) {
+            System.out.println(e);
+        } finally {
+           cerrarConexiones(null, conn);
+        }
+        return resultado;
+    }
+    public static boolean validarAlumno(Alumno alumno) {
+        Statement stm = null;
+        Connection conn = null;
+        boolean verificacion =false;
+        ResultSet rs = null;
+        conn = cn.conectar();
+        try {
+                String sql ="select * from usuarios " 
+                        + "where matricula= '"+alumno.getMatricula()+"' and contrasena='"+alumno.getContrasena()+"'";
+                stm = (Statement) conn.createStatement();
+                rs = stm.executeQuery(sql);
+                if(rs.next()){
+                    verificacion = true;
+                }else{
+                   verificacion = false;
+                }
+                conn.close();
+            } catch (SQLException ex) {
+                System.err.println(ex);
+            }
+        return verificacion;
+    }
+
+    public static boolean agregarAlumno(Alumno alumno) {
+        PreparedStatement stm = null;
+        Connection conn = null;
+        boolean msj= false;
+
+        conn = cn.conectar();
+        try {
+            String sql = "INSERT INTO `alumno`(`nombre`,`apellido`,`nacionalidad`,`matricula`,`contrasena`)VALUES(?,?,?,?,?);";
+            stm = (PreparedStatement) conn.prepareStatement(sql);
+            stm.setString(1, alumno.getNombre());
+            stm.setString(2, alumno.getApellido());
+            stm.setString(3, alumno.getNacionalidad());
+            stm.setString(4, alumno.getMatricula());
+            stm.setString(5, alumno.getContrasena());
+            if (stm.executeUpdate() > 0)
+                msj = true;
+            else
+                msj = false;
+
+        } catch (Exception e) {
+            System.out.println(e);
+        } finally {
+            cerrarConexiones(stm,conn);
+        }
+        return msj;
+    }
+
+    private static void cerrarConexiones(PreparedStatement stm,Connection conn) {
+        if (stm != null) {
+            try {
+                stm.close();
+            } catch (Exception e) {
+                System.out.println(e);
+            }
+            stm = null;
+        }
+        try {
+            conn.close();
+            cn.cerrarConexion();
+        } catch (Exception e) {
+            System.out.println(e);
+        }
+    }
+    public static boolean eliminarAlumno(Alumno alumno) {
+       
+       return false;
+    }
+    public static boolean editarAlumno(Alumno alumno) {
+        PreparedStatement stm = null;
+        Connection conn = null;
+        boolean verificacion =false;
+        conn = cn.conectar();
+        try {
+                String sql ="UPDATE `producto` SET `nombreProducto` = '"+p.getNombreProducto()+"',`precio` = '"+p.getPrecio()+"',`cantidad` = '"+p.getCantidad()+"',`imagen` = '"+p.getImagen()+"'WHERE `id` = '"+p.getId()+"';";
+                stm = conn.prepareStatement(sql);
+                stm.executeUpdate();
+                verificacion = true;
+                conn.close();
+            } catch (SQLException ex) {
+                System.err.println(ex);
+            }finally{
+                actualizarVenta(p);
+            }
+        return verificacion;
+    }
+}

backend/src/main/java/mx/uv/Model/Administrador.java

@@ -1,3 +1,5 @@
+package mx.uv.Model;
+
 public class Administrador {
     private int id;
     private String matricula;

backend/src/main/java/mx/uv/Model/Alumno.java

@@ -1,4 +1,4 @@
-package model;
+package mx.uv.Model;
 // * Clase Alumno que servira para comunicarse con el controlador.
 public class Alumno {
     private int id;
@@ -25,23 +25,21 @@ public class Alumno {
     public Alumno() {
     }
 
-    public Alumno(int id, String nombre, String apellido, String nacionalidad) {
+    public Alumno(String nombre, String apellido, String nacionalidad, String matricula, String contrasena) {
-        this.id = id;
         this.nombre = nombre;
         this.apellido = apellido;
         this.nacionalidad = nacionalidad;
-    }
-    
-    public Alumno(int id, String matricula, String contrasena) {
-        this.id = id;
         this.matricula = matricula;
         this.contrasena = contrasena;
     }
+    
     public Alumno(String matricula, String contrasena) {
         this.matricula = matricula;
         this.contrasena = contrasena;
     }
 
+
+
     public void setId(int id) {
         this.id = id;
     }

backend/src/main/java/mx/uv/Model/Tutor.java

@@ -1,3 +1,4 @@
+package mx.uv.Model;
 public class Tutor {
     private int id;
     private String nombre;