JTable常见用法细则
JTable是Swing编程中很常用的控件,这里总结了一些常用方法以备查阅.欢迎补充,转载请注明作者与出处.
一.创建表格控件的各种方式:
1) 调用无参构造函数.
JTable table = new JTable();
2) 以表头和表数据创建表格.
Object[][] cellData = 
{{"row1-col1", "row1-col2"},{"row2-col1", "row2-col2"}};String[] columnNames = {"col1", "col2"}; JTable table = new JTable(cellData, columnNames);
3) 以表头和表数据创建表格,并且让表单元格不可改.
String[] headers = { "表头一", "表头二", "表头三" };Object[][] cellData = null;DefaultTableModel model = new DefaultTableModel(cellData, headers) {
public boolean isCellEditable(int row, int column) { return false;
}
};table = new JTable(model);
二.对表格列的控制
1) 设置列不可随容器组件大小变化自动调整宽度.
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
2) 限制某列的宽度.
TableColumn firsetColumn = table.getColumnModel().getColumn(0);firsetColumn.setPreferredWidth(30);firsetColumn.setMaxWidth(30);firsetColumn.setMinWidth(30);
3) 设置当前列数.
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();int count=5;tableModel.setColumnCount(count);
4) 取得表格列数
int cols = table.getColumnCount();
5) 添加列
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();tableModel.addColumn("新列名");
6) 删除列
table.removeColumn(table.getColumnModel().getColumn(columnIndex));// columnIndex是要删除的列序号
三.对表格行的控制
1) 设置行高
table.setRowHeight(20);
2) 设置当前航数
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();int n=5;tableModel.setRowCount(n);
3) 取得表格行数
int rows = table.getRowCount();
4) 添加表格行
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();tableModel.addRow(new Object[]{"sitinspring", "35", "Boss"});
5) 删除表格行
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();model.removeRow(rowIndex);// rowIndex是要删除的行序号
四.存取表格单元格的数据
1) 取单元格数据
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();String cellValue=(String) tableModel.getValueAt(row, column);// 取单元格数据,row是行号,column是列号
2) 填充数据到表格.
注:数据是Member类型的链表,Member类如下:
public class Member{ // 名称 private String name; // 年龄 private String age; // 职务 private String title; }
填充数据的代码:
public void fillTable(List<Member> members){ DefaultTableModel tableModel = (DefaultTableModel) table .getModel(); tableModel.setRowCount(0);// 清除原有行 // 填充数据 for(Member member:members){ String[] arr=new String[3]; arr[0]=member.getName(); arr[1]=member.getAge(); arr[2]=member.getTitle(); // 添加数据到表格 tableModel.addRow(arr); } // 更新表格 table.invalidate(); }
2) 取得表格中的数据
public List<Member> getShowMembers(){ List<Member> members=new ArrayList<Member>(); DefaultTableModel tableModel = (DefaultTableModel) table .getModel(); int rowCount=tableModel.getRowCount(); for(int i=0;i<rowCount;i++){ Member member=new Member(); member.setName((String)tableModel.getValueAt(i, 0));// 取得第i行第一列的数据 member.setAge((String)tableModel.getValueAt(i, 1));// 取得第i行第二列的数据 member.setTitle((String)tableModel.getValueAt(i, 2));// 取得第i行第三列的数据 members.add(member); } return members; }
五.取得用户所选的行
1) 取得用户所选的单行
int selectRows=table.getSelectedRows().length;// 取得用户所选行的行数DefaultTableModel tableModel = (DefaultTableModel) table.getModel();if(selectRows==1){ int selectedRowIndex = table.getSelectedRow(); // 取得用户所选单行 .// 进行相关处理}
2) 取得用户所选的多行
int selectRows=table.getSelectedRows().length;// 取得用户所选行的行数DefaultTableModel tableModel = (DefaultTableModel) table.getModel();if(selectRows>1) int[] selRowIndexs=table.getSelectedRows();// 用户所选行的序列 for(int i=0;i<selRowIndexs.length;i++){ // 用tableModel.getValueAt(row, column)取单元格数据 String cellValue=(String) tableModel.getValueAt(i, 1); }}
六.添加表格的事件处理
view.getTable().addMouseListener(new MouseListener() { public void mousePressed(MouseEvent e) { // 鼠标按下时的处理 } public void mouseReleased(MouseEvent e) { // 鼠标松开时的处理 } public void mouseEntered(MouseEvent e) { // 鼠标进入表格时的处理 } public void mouseExited(MouseEvent e) { // 鼠标退出表格时的处理 } public void mouseClicked(MouseEvent e) { // 鼠标点击时的处理 } });
例子：
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class PTest{
public PTest()
{
String head[] = {"学号", "姓名", "成绩（请双击以下空格输入）"};
Icon bug = new ImageIcon(getClass().getResource("789.jpg"));
JLabel a = new JLabel (bug);
JTable a1 = new JTable (20,3);
a1.setRowHeight (30);//设置高度
a1.setDragEnabled(true);
//设置第一、二列不可可编辑
DefaultTableModel tableModel = new DefaultTableModel(20,3){
boolean[] editables = {false, false, true};
public boolean isCellEditable(int row, int col)
{
return editables[col];
}
//使table不可编辑的代码（放在model中有效）全部不可编辑
// public boolean isCellEditable(int row, int column)
// {
// return false;
// }
};
a1.setModel(tableModel);
for (int i=0; i<3; i++)
a1.getModel().setValueAt(head[i], 0, i);
JPanel panelwrap = new JPanel (new FlowLayout ());
JPanel panel = new JPanel (new GridLayout (2,1));
panel.setPreferredSize (new Dimension (500,400));
// panel.setBackground (Color.black);
panel.add (a,BorderLayout.CENTER);
JScrollPane a2 = new JScrollPane (a1);
panel.add (a2,BorderLayout.CENTER);
panelwrap.add(panel);
JFrame frame = new JFrame ("JTableDemo");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.setContentPane (panelwrap);
frame.setSize(500,400);
frame.pack();
frame.show();
}
public static void main(String[] args) {
PTest k = new PTest();
}
}
//////////////////////////////////////////自己的//////////////////////////////////////
private JTable getJTable0() {
if (jTable0 == null) {
jTable0 = new JTable();
jTable0.setModel(new DefaultTableModel(new Object[][] { {false, "null", "null", "com1", "null", "null", "null", "null", "null", "null", },
{false, "null", "null", "com2", "null", "null", "null", "null", "null", "null", },
{ false, "null", "null", "com3", "null", "null", "null", "null", "null", "null",},
{ false,"null", "null", "com4", "null", "null", "null", "null", "null", "null", },
{ false,"null", "null", "com5", "null", "null", "null", "null", "null", "null", },
{ false, "null", "null", "com6", "null", "null", "null", "null", "null", "null",},
{ false, "null", "null", "com7", "null", "null", "null", "null", "null", "null", },
{false, "null", "null", "com8", "null", "null", "null", "null", "null", "null", },
{ false,"null", "null", "com9", "null", "null", "null", "null", "null", "null", },
{ false,"null", "null", "com10", "null", "null", "null", "null", "null", "null", },
{false, "null", "null", "com11", "null", "null", "null", "null", "null", "null", },
{ false, "null", "null", "com12", "null", "null", "null", "null", "null", "null", }, }, new String[] {"操作", "ID", "status", "序号", "产品序列号", "半成品序列号",
"所属工作任务号", "产品型号（pn码）", "生产进度状态", "端口状态", }) {
private static final long serialVersionUID = 1L;
Class<?>[] types = new Class<?>[] { Boolean.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class,
Object.class, };
public Class<?> getColumnClass(int columnIndex) {
return types[columnIndex];
}
// //使table不可编辑的代码（放在model中有效）全部不可编辑
// public boolean isCellEditable(int row, int column)
// {
// return false;
// }
//指定列不可编辑
boolean[] editables = {true, false, false,false,false,false,false,false,false,false};
public boolean isCellEditable(int row, int col)
{
return editables[col];
}
//指定行不可编辑
boolean[] editables = {true, false, false,false,false,false,false,false};
public boolean isCellEditable(int row, int col)
{
return editables[row];
}
});
}
return jTable0;
}