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Cara menggunakan MySQL dan Java untuk membangunkan pemain muzik dalam talian yang mudah
Membangunkan pemain muzik dalam talian adalah projek seksual yang mencabar dan menarik. Artikel ini akan memperkenalkan cara menggunakan pangkalan data MySQL dan bahasa pengaturcaraan Java untuk membina pemain muzik dalam talian yang mudah, dan menyediakan contoh kod khusus.
1. Analisis keperluan projek
Sebelum memulakan pembangunan, kita perlu menjelaskan keperluan projek. Pemain muzik dalam talian yang mudah perlu mempunyai fungsi berikut:
public class UserRegistration { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "INSERT INTO users (username, password) VALUES (?, ?)"; pstmt = conn.prepareStatement(sql); pstmt.setString(1, "username"); pstmt.setString(2, "password"); pstmt.executeUpdate(); System.out.println("User registered successfully!"); } catch (Exception e) { e.printStackTrace(); } finally { try { if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
public class UserLogin { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "SELECT * FROM users WHERE username = ? AND password = ?"; pstmt = conn.prepareStatement(sql); pstmt.setString(1, "username"); pstmt.setString(2, "password"); rs = pstmt.executeQuery(); if (rs.next()) { System.out.println("User logged in successfully!"); } else { System.out.println("Invalid username or password!"); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (rs != null) { rs.close(); } if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
public class SongUpload { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "INSERT INTO songs (title, artist, url) VALUES (?, ?, ?)"; pstmt = conn.prepareStatement(sql); pstmt.setString(1, "song title"); pstmt.setString(2, "artist"); pstmt.setString(3, "song_url"); pstmt.executeUpdate(); System.out.println("Song uploaded successfully!"); } catch (Exception e) { e.printStackTrace(); } finally { try { if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
#🎜🎜 Fungsi pemadaman lagu
public class SongDelete { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "DELETE FROM songs WHERE id = ?"; pstmt = conn.prepareStatement(sql); pstmt.setInt(1, 1); pstmt.executeUpdate(); System.out.println("Song deleted successfully!"); } catch (Exception e) { e.printStackTrace(); } finally { try { if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
5 Pelaksanaan fungsi carian dan main balik lagu
Fungsi carian dan main balik lagu boleh digunakan dalam Java untuk menanyakan pangkalan data dan menggunakan. JDBC di halaman hujung hadapan Ini dicapai dengan memaparkan senarai lagu pada skrin. Berikut ialah contoh kod untuk melaksanakan fungsi carian dan main balik:public class SongSearch { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "SELECT * FROM songs WHERE title LIKE ?"; pstmt = conn.prepareStatement(sql); pstmt.setString(1, "%keyword%"); rs = pstmt.executeQuery(); while (rs.next()) { System.out.println("Song Title: " + rs.getString("title")); System.out.println("Artist: " + rs.getString("artist")); System.out.println("URL: " + rs.getString("url")); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (rs != null) { rs.close(); } if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
#🎜🎜🎜 Fungsi main balik lagu
public class SongPlayer { public static void main(String[] args) { // 根据歌曲URL进行音频播放 } }
Penciptaan dan pengurusan senarai main boleh dilakukan dengan menggunakan JDBC untuk mengendalikan jadual senarai main dalam Java capai. Berikut ialah contoh kod bagi fungsi penciptaan dan pengurusan senarai main:
Fungsi penciptaan senarai lagu
public class PlaylistCreate { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "INSERT INTO playlists (name, userId) VALUES (?, ?)"; pstmt = conn.prepareStatement(sql); pstmt.setString(1, "playlist name"); pstmt.setInt(2, 1); pstmt.executeUpdate(); System.out.println("Playlist created successfully!"); } catch (Exception e) { e.printStackTrace(); } finally { try { if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
public class PlaylistManagement { public static void main(String[] args) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/music_player", "root", "password"); String sql = "SELECT * FROM playlists WHERE userId = ?"; pstmt = conn.prepareStatement(sql); pstmt.setInt(1, 1); rs = pstmt.executeQuery(); while (rs.next()) { System.out.println("Playlist Name: " + rs.getString("name")); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (rs != null) { rs.close(); } if (pstmt != null) { pstmt.close(); } if (conn != null) { conn.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
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