java用Net beans自带功能将表中数据显示在Jtable

首先，你需要连接到数据库并从表中获取数据。可以使用JDBC来连接到数据库，例如MySQL。以下是一个简单的代码示例：

try {
    // Connect to the database
    Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/mydatabase", "username", "password");

    // Create a statement
    Statement stmt = conn.createStatement();

    // Execute a query to get all data from a table
    ResultSet rs = stmt.executeQuery("SELECT * FROM mytable");

    // Create a new table model with the data
    DefaultTableModel model = new DefaultTableModel();
    model.setColumnIdentifiers(new String[]{"Column 1", "Column 2", "Column 3"});

    // Loop through the result set and add each row to the table model
    while (rs.next()) {
        Object[] row = new Object[]{rs.getString("column1"), rs.getString("column2"), rs.getString("column3")};
        model.addRow(row);
    }

    // Create a new JTable with the table model
    JTable table = new JTable(model);

    // Add the table to a JScrollPane and add the scroll pane to the frame
    JScrollPane scrollPane = new JScrollPane(table);
    frame.add(scrollPane);

    // Close the result set, statement, and connection
    rs.close();
    stmt.close();
    conn.close();

} catch (SQLException e) {
    e.printStackTrace();
}

这将创建一个包含表中所有数据的JTable，并将其添加到一个带有滚动条的JScrollPane中，以便可以滚动浏览表中的所有数据。你可以根据需要自定义表格的外观和功能。