要将数据从数据库导入 Java 表格，可以使用 JDBC 连接数据库并执行查询语句来获取数据，然后将数据填充到 Java 表格中。

以下是一个简单的示例代码来演示如何将数据从数据库中导入到 Java 表格中：

```java

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTable;

public class Main {

public static void main(String[] args) {

String url = "jdbc:mysql://localhost:3306/mydatabase";

String username = "root";

String password = "password";

try (Connection conn = DriverManager.getConnection(url, username, password);

Statement stmt = conn.createStatement()) {

String query = "SELECT * FROM mytable";

ResultSet rs = stmt.executeQuery(query);

JTable table = new JTable(buildTableModel(rs));

JFrame frame = new JFrame();

frame.add(new JScrollPane(table));

frame.setSize(600, 400);

frame.setVisible(true);

} catch (SQLException e) {

e.printStackTrace();

}

}

public static DefaultTableModel buildTableModel(ResultSet rs) throws SQLException {

ResultSetMetaData metaData = rs.getMetaData();

// Create column names

Vector columnNames = new Vector<>();

int columnCount = metaData.getColumnCount();

for (int i = 1; i <= columnCount; i++) {

columnNames.add(metaData.getColumnName(i));

}

// Create data rows

Vector> data = new Vector<>();

while (rs.next()) {

Vector