當(dāng)前位置：首頁 > 编程资源 > 编程问答 >内容正文

编程问答

JTable demo

發(fā)布時(shí)間：2025/3/8 编程问答 24 豆豆

生活随笔收集整理的這篇文章主要介紹了 JTable demo 小編覺得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.

簡單講就是在沒有使用layout manager的時(shí)候用setSize，在使用了layout manager 的時(shí)候用setPreferredSize
?
并且setPreferredSize通常和setMinimumSize、setMaximumSize聯(lián)系起來使用
setSize()是你手動(dòng)來設(shè)置組件的大小
Dimension 類封裝單個(gè)對(duì)象中組件的寬度和高度（精確到整數(shù)）。該類與組件的某個(gè)屬性關(guān)聯(lián)。由 Component 類和 LayoutManager 接口定義的一些方法將返回 Dimension 對(duì)象
setPreferredSize設(shè)置此組件的首選大小
一般會(huì)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();// 事件處理... }}}

?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));// 設(shè)置選擇模式。以下列表描述了接受的選擇模式：只能選擇一行！ jtabOrders.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);// 攔截Ctrl+A組合鍵，防止焦點(diǎn)丟失// 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里被選擇的行發(fā)生變化時(shí)處理某事件的方法。例如： 1：選擇第一行的狀態(tài)下，選擇第二行時(shí)* 2：只選擇一行的狀態(tài)下，追加選擇另外的行時(shí)*/jtabOrders.getSelectionModel().addListSelectionListener(new ListSelectionListener() {@Overridepublic void valueChanged(ListSelectionEvent e) {DefaultListSelectionModel model = (DefaultListSelectionModel) e.getSource();if (!e.getValueIsAdjusting()) {/** public boolean getValueIsAdjusting()* 一次鼠標(biāo)的點(diǎn)擊會(huì)有兩次事件響應(yīng)（按下和釋放）。* 前者的事件屬性中g(shù)etValueIsAdjusting()=true，后者是false。* 因此，可以通過判斷getValueIsAdjusting()來區(qū)別鼠標(biāo)按下和釋放。*/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/

//設(shè)置是否可以選擇此模型中的列。
??? jtabOrders.setColumnSelectionAllowed(false);
??? //設(shè)置是否可以選擇此模型中的行。
??? jtabOrders.setRowSelectionAllowed(true);

??? //設(shè)置此表是否允許同時(shí)存在行選擇和列選擇。

???? jtabOrders.setCellSelectionEnabled(true);

static?int	MULTIPLE_INTERVAL_SELECTION ??????????selectionMode 屬性的值：一次選擇一個(gè)或多個(gè)連續(xù)的索引范圍。
static?int	SINGLE_INTERVAL_SELECTION ??????????selectionMode 屬性的值：一次選擇一個(gè)連續(xù)的索引范圍。
static?int	SINGLE_SELECTION ??????????selectionMode 屬性的值：一次選擇一個(gè)列表索引。

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

編寫該JTable的TableModel的String getColumnName(int columnIndex)方法
//傳進(jìn)來的是列的索引值
//返回該列的列名/
/給JTable設(shè)置好TableModel后，這個(gè)方法由系統(tǒng)自動(dòng)調(diào)用
//顯示在JTable中
public String getColumnName(int columnIndex){??
return "你想要設(shè)置的對(duì)應(yīng)列的列名";
}
eg.:
public String getColumnName(int columnIndex){??
if(columnIndex == 1)
return "索引值為 1 的列的名字";????
if(columnIndex == 2)
return "索引值為 2 的列的名字";??
...
}

看了一篇實(shí)現(xiàn)JTable的列寬與內(nèi)容的自適應(yīng)?稍加修飾后如下：

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 = { "檔案號(hào)", "姓名", "年齡", "性別", "婚姻狀況", "職業(yè)", "聯(lián)系電話" };Object[][] rowData = { { "010110", "張三", "28", "男", "已婚", "教師", "13686562936" },{ "010110", "李四", "28", "男", "已婚", "教師", "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) {// 雙擊鼠標(biāo)if (e.getClickCount() == 2) { int colummCount = tb.getModel().getColumnCount();// 列數(shù)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();} }

?
加載時(shí)選中多行：

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的排序測試");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);final String columnNames[] = { "ID", "姓名", "國籍", "年齡", "體重" };final Object sortRight_1st_withInt[][] = {{ 1, "嘉靖", "中國", 44, 90.5 },{ 3, "姚明", "中國", 25, 120.5 },{ 2, "趙子龍", "西蜀", 1234, 130.6 },{ 10, "曹操", "北魏", 2112, 90.0 },{ 20, "Bill Gates", "美國", 45, 0.5 },{ 5, "Tomas", "英國", 33, 100.0 }};final Object sortWrong_1st_withString[][] = {{ "1", "嘉靖", "中國", 44, "90.5" },{ "3", "姚明", "中國", 25, "120.5" },{ "2", "趙子龍", "西蜀", 1234, "130.6" },{ "10", "曹操", "北魏", 2112, "90.0" },{ "20", "Bill Gates", "美國", 45, "0.5" },{ "5", "Tomas", "英國", 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);// 只能選一行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，先清除對(duì)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);}}

排序有兩個(gè)途徑：
（1）為每列的值設(shè)置正確的類型，并且重寫DefaultTableModel中的getColumnClass方法
因?yàn)镮nteger,Double實(shí)現(xiàn)了Comparator接口，即可正確排序
（2）table.setRowSorter(new TableRowSorter<TableModel>(model));
然后為每列指定特定的Comparator：

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

定義表的時(shí)候，選擇按自定義算法排序的字段，如果不設(shè)置，默認(rèn)按字符串的ASCII碼排序

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);

一個(gè)關(guān)于SWING的工程，當(dāng)然會(huì)用到大量的表格最早清空表格是這樣寫的

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

用這個(gè)方法是有問題的，因?yàn)槭荍Table??? >> TableModel? >> TableData（Vector或String[]）這樣的映射關(guān)系，如果用上面的方法，如果數(shù)據(jù)增加或減少都不會(huì)通知TableModel ，就導(dǎo)致每次清數(shù)據(jù)就報(bào)數(shù)據(jù)越界異常ArrayIndexOutOfBoundsException。

如果直接清理數(shù)據(jù)是會(huì)通知上層的監(jiān)聽，改變模型

((DefaultTableModel) table.getModel()).getDataVector().clear();?? //清除表格數(shù)據(jù)
((DefaultTableModel) table.getModel()).fireTableDataChanged();//通知模型更新
table.updateUI();//刷新表格

這樣做了，程序好像是不出問題了，但是如果對(duì)表格做了排序操作，再看看，程序是不出錯(cuò)了，但是每加載一行，就看到表格會(huì)做一次排序，這個(gè)過程的開銷很大，如果數(shù)據(jù)量大的話，甚至導(dǎo)致內(nèi)存溢出。經(jīng)過一天半的研究，跟蹤，終于找到了問題所在，創(chuàng)建表的時(shí)候，引用了排序器，排序器的監(jiān)聽是一個(gè)獨(dú)立于JTable >> TableModel >> TableData之外，又在后臺(tái)影響著這三者之間的關(guān)系的一個(gè)人，在程序調(diào)試時(shí)，很難找到他在那里影響的，最終在JDK API里發(fā)現(xiàn)了一點(diǎn)端倪

javax.swing
類 RowSorter<M>

java.lang.Objectjavax.swing.RowSorter<M> 類型參數(shù)： M - 底層模型的類型

?setSortKeys

public abstract void setSortKeys(List<? extends RowSorter.SortKey> keys) 設(shè)置當(dāng)前排序鍵。 參數(shù)： keys - 新的 SortKeys；null 是指定一個(gè)空列表的簡寫，表示視圖應(yīng)該是未排序的。 toggleSortOrder public abstract void toggleSortOrder(int column)

顛倒指定列的排序順序。調(diào)用此方法時(shí)，由子類提供具體行為。通常，如果指定列已經(jīng)是主要排序列，則此方法將升序變?yōu)榻敌?#xff08;或?qū)⒔敌蜃優(yōu)樯?#xff09;；否則，使指定列成為主要排序列，并使用升序排序順序。如果指定列不可排序，則此方法沒有任何效果。

如果此方法導(dǎo)致更改排序順序和排序操作，則它將發(fā)送適當(dāng)?shù)?RowSorterListener 通知。

參數(shù)：

column - 要切換排序順序的列，就底層模型而言

拋出：

IndexOutOfBoundsException - 如果列超出底層模型的范圍

上面這兩個(gè)方法很像，但又有區(qū)別，我先用toggleSortOrder(int column) 這個(gè)column必須有一個(gè)有效的列號(hào)，就是說，不能用-1,這個(gè)方法是不能取消對(duì)表的排序選中的。那么另一個(gè)方法setSortKeys(List<? extendsRowSorter.SortKey> keys)，這個(gè)就比較難了，我也不知道應(yīng)該傳什么參數(shù)，再看參數(shù)說明：null 是指定一個(gè)空列表的簡寫，表示視圖應(yīng)該是未排序的?！皯?yīng)該”兩字說的實(shí)在是詭異，我就把它當(dāng)成死馬醫(yī)，看看到底行不行，嘿嘿，通過方法：rowSort.setSortKeys(null)；把表格還原到不排序的狀態(tài)，就達(dá)到我想要的結(jié)果了，大功終于告成！

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 點(diǎn)擊表頭，能不能進(jìn)行多列排序

建議已現(xiàn)有Jtable開發(fā)新的Table類，加個(gè)數(shù)組用于記錄排序列的先后次序，重寫Jtable的表頭單擊事件

轉(zhuǎn)載于:https://www.cnblogs.com/softidea/p/4535890.html