JTable demo

 

简单讲就是在没有使用layout manager的时候用setSize，在使用了layout manager 的时候用setPreferredSize
 
并且setPreferredSize通常和setMinimumSize、setMaximumSize联系起来使用
setSize()是你手动来设置组件的大小
Dimension 类封装单个对象中组件的宽度和高度（精确到整数）。该类与组件的某个属性关联。由 Component 类和 LayoutManager 接口定义的一些方法将返回 Dimension 对象
setPreferredSize设置此组件的首选大小
一般会用setPreferredSize 

http://www.cnblogs.com/langtianya/archive/2012/10/13/2722904.html

 

// in constructor
rowSM_treatments = table_histories.getSelectionModel();
rowSM_treatments.addListSelectionListener(new ListSelectionListener() {public void valueChanged(ListSelectionEvent e) {if (e.getValueIsAdjusting()) return;ListSelectionModel lsm = (ListSelectionModel)e.getSource();if (lsm.isSelectionEmpty()) {System.out.println("No rows are selected.");} else {selectedRow_treatments = lsm.getMinSelectionIndex();System.out.println("selected Row> " + selectedRow_treatments);//do more}}});

 

table.changeSelection(row, 0, false, false);

import javax.swing.JTable;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;public class SelectionListener implements ListSelectionListener {JTable table;SelectionListener(JTable table) {this.table = table;}public void valueChanged(ListSelectionEvent e) {if (e.getSource() == table.getColumnModel().getSelectionModel() && table.getColumnSelectionAllowed()) {int firstRow = e.getFirstIndex();int lastRow = e.getLastIndex();// 事件处理...
        }}}

 

int	getFirstIndex()           Returns the index of the first row whose selection may have changed.
int	getLastIndex()           Returns the index of the last row whose selection may have changed.
boolean	getValueIsAdjusting()           Returns whether or not this is one in a series of multiple events, where changes are still being made.
String	toString()           Returns a String that displays and identifies this object's properties.

  

package swing.table;import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.util.Date;import javax.swing.AbstractAction;
import javax.swing.DefaultListSelectionModel;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.KeyStroke;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;public class SelectionModeDemo {String[] headings = { "Name", "Customer ID", "Order #", "Status" };Object[][] data = {{ "A", new Integer(3), "0", new Date() },{ "B", new Integer(6), "4", new Date() },{ "C", new Integer(9), "9", new Date() },{ "D", new Integer(7), "1", new Date() },{ "E", new Integer(4), "1", new Date() },{ "F", new Integer(8), "2", new Date() },{ "G", new Integer(6), "1", new Date() }};JTable jtabOrders = new JTable(data, headings);SelectionModeDemo() {final JFrame jfrm = new JFrame("JTable Demo");jfrm.setLayout(new FlowLayout());jfrm.setSize(800, 600);jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JScrollPane jscrlp = new JScrollPane(jtabOrders);jfrm.add(jscrlp);jtabOrders.setPreferredScrollableViewportSize(new Dimension(420, 200));// 设置选择模式。以下列表描述了接受的选择模式：只能选择一行！
        jtabOrders.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);// 拦截Ctrl+A组合键，防止焦点丢失// new event create.KeyStroke ctrlA = KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK);// overwrite super class's event.jtabOrders.getInputMap().put(ctrlA, "DO_NOTHING");jtabOrders.getActionMap().put("DO_NOTHING", new AbstractAction() {private static final long serialVersionUID = 1L;@Overridepublic void actionPerformed(ActionEvent e) {System.out.println("Do nothing");}});/*** 在JTable里被选择的行发生变化时处理某事件的方法。 例如： 1：选择第一行的状态下，选择第二行时* 2：只选择一行的状态下，追加选择另外的行时*/jtabOrders.getSelectionModel().addListSelectionListener(new ListSelectionListener() {@Overridepublic void valueChanged(ListSelectionEvent e) {DefaultListSelectionModel model = (DefaultListSelectionModel) e.getSource();if (!e.getValueIsAdjusting()) {/** public boolean getValueIsAdjusting()* 一次鼠标的点击会有两次事件响应（按下和释放）。* 前者的事件属性中getValueIsAdjusting()=true，后者是false。* 因此，可以通过判断getValueIsAdjusting()来区别鼠标按下和释放。*/JOptionPane.showMessageDialog(jfrm, "Msg:" +model.getSelectionMode() + " "+ jtabOrders.getValueAt(jtabOrders.getSelectedRow(), 0).toString());}}});jfrm.setLocationRelativeTo(null);jfrm.setVisible(true);jtabOrders.setColumnSelectionAllowed(false);jtabOrders.setRowSelectionAllowed(true);}public static void main(String args[]) {new SelectionModeDemo();}
}

 

 

 http://melodyvictor.blog.163.com/blog/static/1180061572011417315978/

 

//设置是否可以选择此模型中的列。
    jtabOrders.setColumnSelectionAllowed(false);
    //设置是否可以选择此模型中的行。
    jtabOrders.setRowSelectionAllowed(true);

    //设置此表是否允许同时存在行选择和列选择。

     jtabOrders.setCellSelectionEnabled(true);

 

static int	MULTIPLE_INTERVAL_SELECTION           selectionMode 属性的值：一次选择一个或多个连续的索引范围。
static int	SINGLE_INTERVAL_SELECTION           selectionMode 属性的值：一次选择一个连续的索引范围。
static int	SINGLE_SELECTION           selectionMode 属性的值：一次选择一个列表索引。

http://blog.csdn.net/youyigong/article/details/6830966

 

 

 

编写该JTable的TableModel的String getColumnName(int columnIndex)方法
//传进来的是列的索引值
//返回该列的列名/
/给JTable设置好TableModel后，这个方法由系统自动调用
//显示在JTable中
public String getColumnName(int columnIndex){  
return "你想要设置的对应列的列名";
}
eg.:
public String getColumnName(int columnIndex){  
if(columnIndex == 1)
return "索引值为 1 的列的名字";    
if(columnIndex == 2)
return "索引值为 2 的列的名字";  
...
}

 

 

看了一篇实现JTable的列宽与内容的自适应 稍加修饰后如下：

public void FitTableColumns(JTable myTable){JTableHeader header = myTable.getTableHeader();int rowCount = myTable.getRowCount();Enumeration columns = myTable.getColumnModel().getColumns();while(columns.hasMoreElements()){TableColumn column = (TableColumn)columns.nextElement();int col = header.getColumnModel().getColumnIndex(column.getIdentifier());int width = (int)myTable.getTableHeader().getDefaultRenderer().getTableCellRendererComponent(myTable, column.getIdentifier(), false, false, -1, col).getPreferredSize().getWidth();for(int row = 0; row<rowCount; row++){int preferedWidth = (int)myTable.getCellRenderer(row, col).getTableCellRendererComponent(myTable,myTable.getValueAt(row, col), false, false, row, col).getPreferredSize().getWidth();width = Math.max(width, preferedWidth);}header.setResizingColumn(column); // 此行很重要column.setWidth(width+myTable.getIntercellSpacing().width);}
}

http://blog.csdn.net/qof3990/article/details/8578350

http://www.blogjava.net/zeyuphoenix/archive/2010/04/08/317755.html

 

 

 

package swing.table;import java.awt.*;
import java.awt.event.*;import javax.swing.*;
import javax.swing.table.TableColumnModel;public class TestTable extends JFrame {private static final long serialVersionUID = 1L;JTable tb;JPanel p = new JPanel();public TestTable() {setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLocation(112, 0);setSize(700, 420);final Object[] columnNames = { "档案号", "姓名", "年龄", "性别", "婚姻状况", "职业", "联系电话" };Object[][] rowData = { { "010110", "张三", "28", "男", "已婚", "教师", "13686562936" },{ "010110", "李四", "28", "男", "已婚", "教师", "13686562936" } };tb = new JTable(rowData, columnNames) {private static final long serialVersionUID = 1L;// 添加部分1public boolean isCellEditable(int row, int column) {return false;}};tb.setPreferredScrollableViewportSize(new Dimension(639, 232));// tb.setEnabled(false);tb.setRowHeight(20);tb.setRowSelectionAllowed(true);tb.setSelectionBackground(Color.lightGray);tb.setSelectionForeground(Color.white);tb.setGridColor(Color.black);tb.setShowGrid(true);tb.setShowHorizontalLines(true);tb.setShowVerticalLines(true);tb.setBackground(Color.white);// 添加部分2tb.addMouseListener(new MouseAdapter() {public void mouseClicked(MouseEvent e) {if (e.getButton() == MouseEvent.BUTTON1) {// 双击鼠标if (e.getClickCount() == 2) {    int colummCount = tb.getModel().getColumnCount();// 列数for (int i = 0; i < colummCount; i++){System.out.print(tb.getModel().getColumnName(i)+":");System.out.print(tb.getModel().getValueAt(tb.getSelectedRow(), i).toString() + "   ");}System.out.println();}}}});JScrollPane pane = new JScrollPane(tb);pane.setBackground(Color.white);p.add(pane);add(p);setVisible(true);}public static void main(String[] args) {new TestTable();}
}

 
加载时选中多行：

ListSelectionModel listSelectionModel = new DefaultListSelectionModel();     
listSelectionModel .setSelectionInterval(0, 2);     
table.setSelectionModel(ListSelectionModel);     
listSelectionModel .removeSelectionInterval(1, 1);    
ListSelectionModel listSelectionModel = new DefaultListSelectionModel();      
listSelectionModel .setSelectionInterval(0, 2);      
table.setSelectionModel(ListSelectionModel);      
listSelectionModel .removeSelectionInterval(1, 1);  

 

JTable中列的排序：

package swing.table.sort;import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.math.BigDecimal;
import java.util.regex.Pattern;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.RowSorter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;public class TestSortedTable {private static int flag = 0;public static void main(String args[]) {JFrame frame = new JFrame("JTable的排序测试");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);final String columnNames[] = { "ID", "姓名", "国籍", "年龄", "体重" };final Object sortRight_1st_withInt[][] = {{ 1, "嘉靖", "中国", 44, 90.5 },{ 3, "姚明", "中国", 25, 120.5 },{ 2, "赵子龙", "西蜀", 1234, 130.6 },{ 10, "曹操", "北魏", 2112, 90.0 },{ 20, "Bill Gates", "美国", 45, 0.5 },{ 5, "Tomas", "英国", 33, 100.0 }};final Object sortWrong_1st_withString[][] = {{ "1", "嘉靖", "中国", 44, "90.5" },{ "3", "姚明", "中国", 25, "120.5" },{ "2", "赵子龙", "西蜀", 1234, "130.6" },{ "10", "曹操", "北魏", 2112, "90.0" },{ "20", "Bill Gates", "美国", 45, "0.5" },{ "5", "Tomas", "英国", 33, "100.0" }};final Object[][] getRightSort_1st_withString = recoverData2Number(sortWrong_1st_withString);final DefaultTableModel model = new CustomizedTableModel(null, null);final JTable table = new JTable(model);table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);// table.setAutoCreateRowSorter(true);table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);// 只能选一行table.getTableHeader().setReorderingAllowed(false);table.setRowSorter(new TableRowSorter<TableModel>(model));JScrollPane pane = new JScrollPane(table);frame.add(pane, BorderLayout.CENTER);JButton changeSourceBtn = new JButton("Change Source");changeSourceBtn.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if (flag % 3 == 0) {model.setDataVector(sortRight_1st_withInt, columnNames);} else if (flag % 3 == 1) {model.setDataVector(sortWrong_1st_withString, columnNames);} else if (flag % 3 == 2) {model.setDataVector(getRightSort_1st_withString, columnNames);}flag++;}});JButton clearBtn = new JButton("Clear");clearBtn.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {try {RowSorter<?> rowSort = table.getRowSorter();if (rowSort != null) {rowSort.setSortKeys(null);// 如果使用了排序器，先清除对表的排序
                    }((DefaultTableModel) table.getModel()).getDataVector().clear();((DefaultTableModel) table.getModel()).fireTableDataChanged();table.updateUI();} catch (Exception ex) {System.out.println(ex);}}});JPanel southPanel = new JPanel();southPanel.setLayout(new FlowLayout());southPanel.add(changeSourceBtn);southPanel.add(clearBtn);frame.add(southPanel, BorderLayout.SOUTH);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(600, 300);frame.setVisible(true);frame.setLocationRelativeTo(null);}private static Object[][] recoverData2Number(Object[][] sortWrong_1st_withString) {Object[][] target = new Object[sortWrong_1st_withString.length][];for (int i = 0; i < sortWrong_1st_withString.length; i++) {Object[] sourceRecord = sortWrong_1st_withString[i];Object[] targetRecord = new Object[sourceRecord.length];for (int j = 0; j < sourceRecord.length; j++) {Object item = sourceRecord[j];if (isNumericInt(sourceRecord)) {item = Integer.parseInt(item.toString());} else if (isNumericDouble(item)) {item = new BigDecimal(item.toString()).doubleValue();}targetRecord[j] = item;}target[i] = targetRecord;}return target;}private static boolean isNumericInt(Object valueAt) {Pattern pattern = Pattern.compile("^[-\\+]?[\\d]*$");return pattern.matcher(valueAt.toString().trim()).matches();}private static boolean isNumericDouble(Object valueAt) {Pattern pattern = Pattern.compile("^[-\\+]?[\\d]*\\.?[\\d]*$");return pattern.matcher(valueAt.toString().trim()).matches();}}class CustomizedTableModel extends DefaultTableModel {private static final long serialVersionUID = 1L;public Class<?> getColumnClass(int column) {if (getRowCount() == 0) {return Object.class;}return getValueAt(0, column).getClass();}public CustomizedTableModel(Object[][] data, Object[] columnNames) {super(data, columnNames);}}

排序有两个途径：
（1）为每列的值设置正确的类型，并且重写DefaultTableModel中的getColumnClass方法
因为Integer,Double实现了Comparator接口，即可正确排序
（2）table.setRowSorter(new TableRowSorter<TableModel>(model));
然后为每列指定特定的Comparator：

public class OrderNumberComparator implements Comparator{public int compare(Object o1, Object o2) {int i = (Integer) o1 - (Integer) o2;return i;}}

定义表的时候，选择按自定义算法排序的字段，如果不设置，默认按字符串的ASCII码排序

JTable dataGrid=new JTable ();DefaultTableModel model = (DefaultTableModel) this.dataGrid.getModel();
TableRowSorter<TableModel> sorter=new TableRowSorter<TableModel>(model);
//sorter.setSortable(0, false);
sorter.setComparator(0, new cimframe.util.OrderNumberComparator());
sorter.setComparator(3, new cimframe.util.OrderNumberComparator());
sorter.setComparator(4, new cimframe.util.OrderNumberComparator());
sorter.setComparator(5, new cimframe.util.OrderNumberComparator());
dataGrid.setRowSorter(sorter);

一个关于SWING的工程，当然会用到大量的表格最早清空表格是这样写的

//                DefaultTableModel model = (DefaultTableModel) table.getModel();
//                for (int i = model.getRowCount() - 1; i >= 0; i--) {
//                    model.removeRow(i);
//                }  

用这个方法是有问题的，因为是JTable    >> TableModel  >> TableData（Vector或String[]）这样的映射关系，如果用上面的方法，如果数据增加或减少都不会通知TableModel ，就导致每次清数据就报数据越界异常ArrayIndexOutOfBoundsException。

 

如果直接清理数据是会通知上层的监听，改变模型

((DefaultTableModel) table.getModel()).getDataVector().clear();   //清除表格数据
((DefaultTableModel) table.getModel()).fireTableDataChanged();//通知模型更新
table.updateUI();//刷新表格

 

这样做了，程序好像是不出问题了，但是如果对表格做了排序操作，再看看，程序是不出错了，但是每加载一行，就看到表格会做一次排序，这个过程的开销很大，如果数据量大的话，甚至导致内存溢出。经过一天半的研究，跟踪，终于找到了问题所在，创建表的时候，引用了排序器，排序器的监听是一个独立于JTable >> TableModel >> TableData之外，又在后台影响着这三者之间的关系的一个人，在程序调试时，很难找到他在那里影响的，最终在JDK API里发现了一点端倪

javax.swing
类 RowSorter<M>

java.lang.Objectjavax.swing.RowSorter<M>
类型参数：

M - 底层模型的类型

 setSortKeys

public abstract void setSortKeys(List<? extends RowSorter.SortKey> keys)

设置当前排序键。

参数：

keys - 新的 SortKeys；null 是指定一个空列表的简写，表示视图应该是未排序的。

toggleSortOrder

public abstract void toggleSortOrder(int column)

颠倒指定列的排序顺序。调用此方法时，由子类提供具体行为。通常，如果指定列已经是主要排序列，则此方法将升序变为降序（或将降序变为升序）；否则，使指定列成为主要排序列，并使用升序排序顺序。如果指定列不可排序，则此方法没有任何效果。

如果此方法导致更改排序顺序和排序操作，则它将发送适当的 RowSorterListener 通知。

 

参数：

column - 要切换排序顺序的列，就底层模型而言

抛出：

IndexOutOfBoundsException - 如果列超出底层模型的范围

上面这两个方法很像，但又有区别，我先用toggleSortOrder(int column) 这个column必须有一个有效的列号，就是说，不能用-1,这个方法是不能取消对表的排序选中的。那么另一个方法setSortKeys(List<? extendsRowSorter.SortKey> keys)，这个就比较难了，我也不知道应该传什么参数，再看参数说明：null 是指定一个空列表的简写，表示视图应该是未排序的。“应该”两字说的实在是诡异，我就把它当成死马医，看看到底行不行，嘿嘿，通过方法：rowSort.setSortKeys(null)；把表格还原到不排序的状态，就达到我想要的结果了，大功终于告成！

http://blog.csdn.net/aptweasel/article/details/7028058

 

http://www.cnblogs.com/tianyaxue/p/3494291.html

http://jingyan.baidu.com/article/fedf07377f003035ac8977c3.html

 

Java JTable 点击表头，能不能进行多列排序

建议已现有Jtable开发新的Table类，加个数组用于记录排序列的先后次序，重写Jtable的表头单击事件