NDV_CODE_BY_VARSHINIP_librarymanagement.java

NDV_CODE_BY_VARSHINIP_LIBRARY/librarymanagement.java

@@ -0,0 +1,106 @@
+ import java.sql.*;
+import java.util.*; 
+
+public class LibraryManager {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        while (true) {
+            System.out.println("\n Library Management System"); 
+            System.out.println("1. Add Book");
+            System.out.println("2. View All Books");
+            System.out.println("3. Search Book by Title");
+            System.out.println("4. Delete Book by ID");
+            System.out.println("5. Exit");
+            System.out.print("Choose: ");
+            int choice = sc.nextInt();
+            sc.nextLine(); // clear newline
+
+            switch (choice) {
+                case 1 -> addBook(sc);
+                case 2 -> viewBooks();
+                case 3 -> searchBook(sc);
+                case 4 -> deleteBook(sc);
+                case 5 -> {
+                    System.out.println("Thank you! Exiting...");
+                    System.exit(0);
+                }
+                default -> System.out.println("Invalid choice.");
+            }
+        }
+    }
+
+    static void addBook(Scanner sc) {
+        try (Connection conn = DBConnection.getConnection()) {
+            System.out.print("Enter Title: ");
+            String title = sc.nextLine();
+            System.out.print("Enter Author: ");
+            String author = sc.nextLine();
+            System.out.print("Enter Year: ");
+            int year = sc.nextInt();
+
+            String sql = "INSERT INTO books (title, author, year) VALUES (?, ?, ?)";
+            PreparedStatement stmt = conn.prepareStatement(sql);
+            stmt.setString(1, title);
+            stmt.setString(2, author);
+            stmt.setInt(3, year);
+            stmt.executeUpdate();
+            System.out.println(" Book added successfully!"); 
+        } catch (Exception e) {
+            System.out.println(" Error: " + e.getMessage()); 
+        }
+    }
+
+    static void viewBooks() {
+        try (Connection conn = DBConnection.getConnection()) {
+            Statement stmt = conn.createStatement();
+            ResultSet rs = stmt.executeQuery("SELECT * FROM books");
+            System.out.printf("%-5s %-30s %-20s %-5s\n", "ID", "Title", "Author", "Year");
+            while (rs.next()) {
+                System.out.printf("%-5d %-30s %-20s %-5d\n",
+                        rs.getInt("id"), rs.getString("title"),
+                        rs.getString("author"), rs.getInt("year"));
+            }
+        } catch (Exception e) {
+            System.out.println(" Error: " + e.getMessage()); 
+        }
+    }
+
+    static void searchBook(Scanner sc) {
+        try (Connection conn = DBConnection.getConnection()) {
+            System.out.print("Enter book title to search: ");
+            String title = sc.nextLine();
+
+            String sql = "SELECT * FROM books WHERE title LIKE ?";
+            PreparedStatement stmt = conn.prepareStatement(sql);
+            stmt.setString(1, "%" + title + "%");
+            ResultSet rs = stmt.executeQuery();
+
+            while (rs.next()) {
+                System.out.printf("Found -> ID: %d, Title: %s, Author: %s, Year: %d\n",
+                        rs.getInt("id"), rs.getString("title"),
+                        rs.getString("author"), rs.getInt("year"));
+            }
+        } catch (Exception e) {
+            System.out.println(" Error: " + e.getMessage()); 
+        }
+    }
+
+    static void deleteBook(Scanner sc) {
+        try (Connection conn = DBConnection.getConnection()) {
+            System.out.print("Enter Book ID to delete: ");
+            int id = sc.nextInt();
+
+            String sql = "DELETE FROM books WHERE id = ?";
+            PreparedStatement stmt = conn.prepareStatement(sql);
+            stmt.setInt(1, id);
+            int rows = stmt.executeUpdate();
+
+            if (rows > 0)
+                System.out.println(" Book deleted successfully!"); 
+            else
+                System.out.println(" No book found with that ID."); 
+        } catch (Exception e) {
+            System.out.println(" Error: " + e.getMessage()); 
+        }
+    }
+}