initial commit

java/PostgresqlDemo.java

@@ -0,0 +1,53 @@
+import java.sql.*;
+import java.util.Properties;
+
+import static java.lang.System.exit;
+
+public class PostgresqlDemo {
+    private Connection conn;
+
+    private PostgresqlDemo() {
+        String url = "jdbc:postgresql://localhost/databasename";
+        Properties props = new Properties();
+        props.setProperty("user", "bdd");
+        props.setProperty("password", "bdd");
+        try {
+            conn = DriverManager.getConnection(url, props);
+        }
+        catch (SQLException e) {
+            e.printStackTrace();
+            exit(1);
+        }
+        try {
+            Statement statement = conn.createStatement();
+            ResultSet resultSet = statement.executeQuery("SELECT * FROM turista");
+            ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
+            for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
+                System.out.printf("%-20s", resultSetMetaData.getColumnName(i));
+            }
+            System.out.print("\n\n");
+            while (resultSet.next()) {
+                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
+                    Object object = resultSet.getObject(i);
+                    System.out.printf("%-20s", object == null ? "NULL" : object.toString());
+                }
+                System.out.print("\n");
+            }
+            resultSet.close();
+            statement.close();
+        }
+        catch (SQLException e) {
+            e.printStackTrace();
+        }
+        try {
+            conn.close();
+        }
+        catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void main(String[] args) {
+        new PostgresqlDemo();
+    }
+}