如何使用MySQL和Java实现一个简单的数据清洗功能

private static final String URL = "jdbc:mysql://localhost:3306/database_name";
private static final String USERNAME = "your_username";
private static final String PASSWord = "your_password";

public static Connection getConnection() throws SQLException {
    Connection conn = null;
    try {
        conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
        System.out.println("Connected to MySQL database!");
    } catch (SQLException e) {
        System.out.println("Failed to connect to MySQL database");
        e.printStackTrace();
    }
    return conn;
}

public static void removeDuplicates(Connection conn) throws SQLException {
    Statement stmt = null;
    ResultSet rs = null;
    try {
        stmt = conn.createStatement();
        String query = "SELECT DISTINCT * FROM original_data";
        rs = stmt.executeQuery(query);
        
        while (rs.next()) {
            // 获取每一行的数据，并进行处理
            // 例如，插入到cleaned_data表中
            // ...
        }
        
        System.out.println("Duplicates removed successfully!");
    } catch (SQLException e) {
        System.out.println("Failed to remove duplicates");
        e.printStackTrace();
    } finally {
        if (rs != null)
            rs.close();
        if (stmt != null)
            stmt.close();
    }
}

public static void main(String[] args) throws SQLException {
    Connection conn = MySQLConnector.getConnection();
    removeDuplicates(conn);
    conn.close();
}