如何显示列名并将滚动条设置为jtable？

Question

connection = DriverManager.getConnection(URL, USER, PASSWORD);
Statement st = connection.createStatement();
ResultSet result = st.executeQuery("select * from department");
table_1.setModel(buildTableModel(result));

方法：

public static DefaultTableModel buildTableModel(ResultSet rs)
        throws SQLException {
    ResultSetMetaData metaData = rs.getMetaData();
    // names of columns
    Vector<String> columnNames = new Vector<String>();
    int columnCount = metaData.getColumnCount();
    for (int column = 1; column <= columnCount; column++) {
        columnNames.add(metaData.getColumnName(column));
    }
    // data of the table
    Vector<Vector<Object>> data = new Vector<Vector<Object>>();
    while (rs.next()) {
        Vector<Object> vector = new Vector<Object>();
        for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
            vector.add(rs.getObject(columnIndex));
        }
        data.add(vector);
    }
    return new DefaultTableModel(data, columnNames);
}

结果：

Answer 1

您需要将JTable包裹在JScrollPane内，并将生成的JScrollPane添加到您的布局中。

您提供的示例代码未显示您如何将JTable添加到应用程序的JPanel或JFrame。

Answer 2

找到解决方案：

我在jframe中放置了一个JScrollPane，然后使用以下代码：

connection = DriverManager.getConnection(URL, USER, PASSWORD);
Statement st = connection.createStatement();
ResultSet result = st.executeQuery("select * from department");
JTable t=new JTable();
t.setModel(buildTableModel(result));
s1.setViewportView(t);

s1是JScrollPane。

输出：