用JTable实现Excel冻结列效果

    具体思路：
        我们可以考虑使用两个JTable（fixTable，mainTable）
        定义一个JScrollPane,把mainTable放在他的viewPort中，
        在新new一个JViewport，把fixTable放在他的上面
        利用JScrollPane的setRowHeaderView（）方法，把这个JViewport作为他的RowHeader
        最后把fixTable的 tableHeader放在JScrollPane的左上方（利用setCorner方法）
        实现选中的同步，因为是2个table,所以我们要人工实现他的同步，使用户开着好象一个table.
        有的时候我们可能还要在表格上监听鼠标事件，那么这个我们如何同步呢，我的想法是我们增加鼠标事件时只给mainTable添加，而fixTable的鼠标事件默认调用mainTable的处理方法，从而实现事件的传递。
    好了下面我们来看一下代码：
    首先是我封装好的FixTable类
       import java.awt.event.MouseAdapter;
       import java.awt.event.MouseEvent;
      import java.awt.event.MouseListener;
    
       import javax.swing.JScrollPane;
      import javax.swing.JTable;
      import javax.swing.JViewport;
      import javax.swing.ListSelectionModel;
      import javax.swing.event.ListSelectionEvent;
     import javax.swing.event.ListSelectionListener;
     import javax.swing.table.AbstractTableModel;
    
     publicclass FixTable {
      private JTable mainTable;
      private JTable fixTable;
     private FixTableModel fixModel;
      private MainTableModel mainModel;
     privateintfixColumnCount; // 冻结的列数
      private String[] columnHeader; // 表头
      private JScrollPane mainScroll;// 装载在父Container的组件
          // private Vector tableData = new Vector(); // 表格中数据
      private Object[][] tableData;
    
      public FixTable(int fixColumnCount, String[] columnHeader,
              Object[][] tableData) {
          this.fixColumnCount = fixColumnCount;
          this.columnHeader = columnHeader;
          this.tableData = tableData;//
          this.initComponents();
      }
    
      /**
      *初始化界面
       */
     privatevoid initComponents() {
          mainTable = new JTable();
          fixTable = new JTable();
          mainModel = new MainTableModel();
         fixModel = new FixTableModel();
          mainTable.setModel(mainModel);
          mainTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          mainTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          fixTable.setModel(fixModel);
          fixTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          fixTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
              mainTable.getSelectionModel().addListSelectionListener(
                 new ListSelectionListener() {
    
                     @Override
                     publicvoid valueChanged(ListSelectionEvent e) {
                        // TODO Auto-generated method stub
                        checkSelection(false);
                     }
    
                 });
          fixTable.getSelectionModel().addListSelectionListener(
                 new ListSelectionListener() {
                     @Override
                    publicvoid valueChanged(ListSelectionEvent e) {
                        // TODO Auto-generated method stub
                        checkSelection(true);
                     }
                 });
    
          // 添加鼠标事件同步两个表的鼠标双击事件
         mainTable.addMouseListener(new MouseAdapter() {
              publicvoid mouseClicked(MouseEvent e) {
                if (e.getClickCount() > 1) {
                     if (e.getSource().equals(mainTable)) {
                        MouseListener[] mls = (MouseListener[]) fixTable
                               .getListeners(MouseListener.class);
                        for (int i = 0; i < mls.length; i++)
                            mls[i].mouseClicked(e);
                    }
    
                 }
              }
          });
    
          fixTable.addMouseListener(new MouseAdapter() {
              publicvoid mouseClicked(MouseEvent e) {
                 if (e.getClickCount() > 1) {
                    if (e.getSource().equals(fixTable)) {
                        System.out.println("首先点击了冻结列");
                     } else {
                       System.out.println("首先点击了内容列");
                     }
                     // if (e.getSource().equals(fixTable)) {
                    // MouseListener[] mls = (MouseListener[]) mainTable
                     // .getListeners(MouseListener.class);
                     // for (int i = 0; i < mls.length; i++)
                     // mls[i].mouseClicked(e);
                    // }
                 }
           }
          });
    
            mainScroll = new JScrollPane();
            mainScroll.getViewport().add(mainTable);
                JViewport fixPort = new JViewport();
            fixPort.setPreferredSize(fixTable.getPreferredSize());
           fixPort.add(fixTable);
            mainScroll.setRowHeaderView(fixPort);
            mainScroll.setCorner(JScrollPane.UPPER_LEFT_CORNER, fixTable
                   .getTableHeader());
         }
    

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【责编:landy】

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