refactoring funzioni, metodi e variabili

creazione file Utils

src/puntocassa/utils/Utils.java

@@ -0,0 +1,103 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package puntocassa.utils;
+
+import java.sql.*;
+import javax.swing.JOptionPane;
+import puntocassa.PuntoCassa;
+
+/**
+ *
+ * @author Francesco DS
+ */
+public class Utils {
+    
+    public static boolean isNumeric(String s) {
+        return s.matches("[-+]?\\d*\\.?\\d+");
+    }
+    
+    
+    public static String mySelect(String query, String campo, String dbStringa, String dbUsername, String dbPassword, PuntoCassa puntoCassa) {
+        String res = "";
+        try {
+            Connection dbConnection = DriverManager.getConnection(dbStringa, dbUsername, dbPassword);
+            Statement st = dbConnection.createStatement();
+            ResultSet rs = st.executeQuery(query);
+            while (rs.next()) {
+
+                res = rs.getString(campo);
+            }
+            rs.close();
+            st.close();
+            dbConnection.close();
+        } catch (SQLException e) {
+            JOptionPane.showMessageDialog(puntoCassa, "Errore MySelect ['" + e.getMessage() + " " + query + "']");
+
+        }
+        if (res == null) {
+            res = "";
+        }
+        return res;
+    }
+    
+    public static Boolean myInsert(String query, String dbStringa, String dbUsername, String dbPassword, PuntoCassa puntoCassa) {
+        //System.out.println(query);
+        Boolean res = false;
+        try {
+            Connection dbConnection = DriverManager.getConnection(dbStringa, dbUsername, dbPassword);
+            Statement st = dbConnection.createStatement();
+            ResultSet rs = st.executeQuery(query);
+            rs.close();
+            st.close();
+            dbConnection.close();
+            res = true;
+        } catch (Exception e) {
+            JOptionPane.showMessageDialog(puntoCassa, "Errore MySelect ['" + e.getMessage() + " " + query + "']");
+
+        }
+        return res;
+    }
+    
+    public static Long mySelectInteger(String query, String campo, String dbStringa, String dbUsername, String dbPassword, PuntoCassa puntoCassa) {
+        System.out.println(query);
+        Long res = 0L;
+        try {
+            Connection dbConnection = DriverManager.getConnection(dbStringa, dbUsername, dbPassword);
+            Statement st = dbConnection.createStatement();
+            ResultSet rs = st.executeQuery(query);
+            while (rs.next()) {
+
+                res = rs.getLong(campo);
+            }
+            rs.close();
+            st.close();
+            dbConnection.close();
+        } catch (SQLException e) {
+            JOptionPane.showMessageDialog(puntoCassa, "Errore MySelectInteger ['" + e.getMessage() + " " + query + "']");
+
+        }
+
+        return res;
+    }
+    
+    
+    public static String spaziBianchi(String testo, Integer Num, Boolean suffisso) {
+        String res = testo;
+        StringBuilder suff = new StringBuilder();
+        if (testo.length() < Num) {
+            Integer delta = Num - testo.length();
+            for (Integer i = 0; i < delta; i++) {
+                suff.append(" ");
+            }
+            if (suffisso == false) {
+                res = suff.toString() + testo;
+            } else {
+                res = testo + suff.toString();
+            }
+
+        }
+        return res;
+    }
+}