根据列值更改JTable行的背景颜色

嗨，我是java jtable cellrendered的新手。 我正在寻找一种适用于我的程序的方法，但我找不到运气。 这是我的Jtable

Employee ID | Name | Status | Position 00565651 Roger Active Manager 00565652 Gina Active Crew 00565652 Alex Inactive Crew 00565652 Seph Active Manager 

数据来自ms访问数据库，但我想更改状态列中值为“非活动”的行的背景/前景。 我在互联网上找到了很多例子，但在我的程序中都不可能。 有人能帮我吗？ 这是我的模特

 String[] columnNames = {"Employee ID","Name", "Status", "Position"}; DefaultTableModel model = new DefaultTableModel(columnNames, 0); 

这是创建我的表以及如何从数据库中获取数据的方法

 public MyList(){//my constructor frame(); loadListFromDB(); } public void frame(){// //codes for frame setsize,titles etc... tblList = new JTable(); tblList.getTableHeader().setPreferredSize(new Dimension(100, 40)); tblList.getTableHeader().setFont(new Font("SansSerif", Font.BOLD, 25)); tblList.setAutoCreateRowSorter(true); tblList.setModel(model); scrollPane.setViewportView(tblList); loadListFromDB(); } public void loadListFromDB(){ String sql = "SELECT emp_id,lname,fname,positional_status from tblEmployee"; try{ PreparedStatement ps = conn.prepareStatement(sql); ResultSet rs = ps.executeQuery(); while (rs.next()){ Vector row = new Vector(); for (int i = 1; i <= 4; i++){ row.addElement( rs.getObject(i) ); } model.addRow(row); } }catch(Exception err){ //for error code } } 

我怎么想以这种方式添加表格？有人能给出简单的例子来改变行的颜色吗？ 在此先感谢..我的程序停止了这个问题。

Answer 1

“我想更改状态列中值为”inactive“的行的背景/前景”

这只是从表/模型中获取价值的问题。 如果该行的状态为非活动状态，则为该行中的每个单元格设置背景/前景。 由于为每个单元格渲染渲染器，因此基本上您需要获取[row][statusColumn] ，这将是每行的状态值。 就像是

 table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer(){ @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) { super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col); String status = (String)table.getModel().getValueAt(row, STATUS_COL); if ("active".equals(status)) { setBackground(Color.BLACK); setForeground(Color.WHITE); } else { setBackground(table.getBackground()); setForeground(table.getForeground()); } return this; } }); 

这是一个简单的例子

 import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import javax.swing.JOptionPane; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableCellRenderer; import javax.swing.table.DefaultTableModel; public class TableRowDemo { private static final int STATUS_COL = 1; private static JTable getTable() { final String[] cols = {"col 1", "status", "col 3"}; final String[][] data = { {"data", "active", "data"}, {"data", "inactive", "data"}, {"data", "inactive", "data"}, {"data", "active", "data"} }; DefaultTableModel model = new DefaultTableModel(data, cols); return new JTable(model) { @Override public Dimension getPreferredScrollableViewportSize() { return new Dimension(350, 150); } }; } private static JTable getNewRenderedTable(final JTable table) { table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer(){ @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) { super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col); String status = (String)table.getModel().getValueAt(row, STATUS_COL); if ("active".equals(status)) { setBackground(Color.BLACK); setForeground(Color.WHITE); } else { setBackground(table.getBackground()); setForeground(table.getForeground()); } return this; } }); return table; } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable(){ public void run() { JOptionPane.showMessageDialog(null, new JScrollPane(getNewRenderedTable(getTable()))); } }); } } 

另一个选项是表的prepareRenderer 。 它会给你相同的结果。

 import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import javax.swing.JOptionPane; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableCellRenderer; public class TableRowDemo { private static final int STATUS_COL = 1; private static JTable getTable() { final String[] cols = {"col 1", "status", "col 3"}; final String[][] data = { {"data", "active", "data"}, {"data", "inactive", "data"}, {"data", "inactive", "data"}, {"data", "active", "data"} }; DefaultTableModel model = new DefaultTableModel(data, cols); return new JTable(model) { @Override public Dimension getPreferredScrollableViewportSize() { return new Dimension(350, 150); } @Override public Component prepareRenderer(TableCellRenderer renderer, int row, int col) { Component c = super.prepareRenderer(renderer, row, col); String status = (String)getValueAt(row, STATUS_COL); if ("active".equals(status)) { c.setBackground(Color.BLACK); c.setForeground(Color.WHITE); } else { c.setBackground(super.getBackground()); c.setForeground(super.getForeground()); } return c; } }; } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable(){ public void run() { JOptionPane.showMessageDialog(null, new JScrollPane(getTable())); } }); } }