feat: add UMass Amherst theme support, implement HTML snippet management system, and update page rendering logic

sisvietnamvn_main/update_theme.java

@@ -0,0 +1,35 @@
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class update_theme {
+    public static void main(String[] args) {
+        String url = "jdbc:oracle:thin:@localhost:1521/sisvietnam";
+        String user = "sisvietnam";
+        String password = "sisvietnam";
+
+        try (Connection conn = DriverManager.getConnection(url, user, password)) {
+            // Let's first see what's in sis_setting
+            try (PreparedStatement checkStmt = conn.prepareStatement("SELECT ID, THEME FROM sis_setting")) {
+                ResultSet rs = checkStmt.executeQuery();
+                while (rs.next()) {
+                    System.out.println("ID: " + rs.getLong("ID") + ", THEME: " + rs.getString("THEME"));
+                }
+            } catch (Exception e) {
+                System.out.println("Error reading theme: " + e.getMessage());
+            }
+
+            // Update theme
+            String updateQuery = "UPDATE sis_setting SET THEME = 'umass'";
+            try (PreparedStatement updateStmt = conn.prepareStatement(updateQuery)) {
+                int rows = updateStmt.executeUpdate();
+                System.out.println("Rows updated: " + rows);
+            }
+
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+}