千万可不敢乱搬代码哦

Posted 2023-02-15 可乐好哇！

数据库连接池

利用单例模式，创建数据库连接池

public class DBUtils 

    private static String URL = "jdbc:mysql://127.0.0.1:3306/onlinemusic?useSSL=false";
    private static String USERNAME = "root";
    private static String PASSWORD = "root";

    private static volatile DataSource DATSSOURCE;

    private static DataSource getDataSource() 
        if (DATSSOURCE == null) 
            synchronized (DBUtils.class) 
                DATSSOURCE = new MysqlDataSource();
                ((MysqlDataSource) DATSSOURCE).setUrl(URL);
                ((MysqlDataSource) DATSSOURCE).setUser(USERNAME);
                ((MysqlDataSource) DATSSOURCE).setPassword(PASSWORD);
            
        
        return DATSSOURCE;
    

    public static Connection getConnection() 
        try 
            Connection connection = getDataSource().getConnection();
            return connection;
         catch (SQLException throwables) 
            throwables.printStackTrace();
            throw new RuntimeException("数据库连接失败！");
        
    

    public static void getClose(Connection connection, PreparedStatement statement, ResultSet resultSet) 
        if (resultSet != null) 
            try 
                resultSet.close();
             catch (SQLException throwables) 
                throwables.printStackTrace();
            
        

        if (statement != null) 
            try 
                statement.close();
             catch (SQLException throwables) 
                throwables.printStackTrace();
            
        

        if (connection != null) 
            try 
                connection.close();
             catch (SQLException throwables) 
                throwables.printStackTrace();