Question

这是一个处理表filtering

的过程的类

// Class DbUtils

public class DbUtils {
    public static TableModel resultSetToTableModel(ResultSet rs) {

        try {
        ResultSetMetaData metaData = rs.getMetaData();
        int numberOfColumns = metaData.getColumnCount();
        Vector columnNames = new Vector();

        for (int column=0; column < numberOfColumns; column++) {
            columnNames.addElement(metaData.getColumnLabel(column + 1));              
        }
        Vector rows = new Vector(); 
        while(rs.next()) {
        Vector newRow = new Vector(); 
        for (int i =1; i <= numberOfColumns; i++) {
        newRow.addElement(rs.getObject(i));
        }
        rows.addElement(newRow);
        } 
        return new DefaultTableModel(rows,columnNames);

       }  catch (Exception e) {
          e.printStackTrace();      
         return null; 
    }



}

}

我有一个更新Job_GUI类中Job Table的方法，传入的参数是sql statements，其中填充了table_job。传入的sql语句取决于考虑JTabbedPane值时选择的index。这就是我的问题所在。

// Job_GUI

 public void UpdateJobTable(String sql) {
    try {

    pst = conn.prepareStatement(sql); 
    rs = pst.executeQuery();

    table_job.setModel(DbUtils.resultSetToTableModel(rs));
    table_job.getColumnModel().getColumn(0).setPreferredWidth(50);
        table_job.getColumnModel().getColumn(1).setPreferredWidth(140);
        table_job.getColumnModel().getColumn(2).setPreferredWidth(170);
        table_job.getColumnModel().getColumn(3).setPreferredWidth(80);
        table_job.getColumnModel().getColumn(4).setPreferredWidth(120);

}
    catch (Exception e ) {

        JOptionPane.showMessageDialog(null, e);
    } 

    finally {

         try {

          pst.close();
          rs.close();
        } catch (Exception e) {

        }
    }
} 



private void JobTabbedPaneStateChanged(javax.swing.event.ChangeEvent evt) {                                           
    JTabbedPane sourceTabbedPane = (JTabbedPane) evt.getSource();
    int index = sourceTabbedPane.getSelectedIndex();
    if (index == 0) {

       jobTableInit(); 

    }
    else if (index == 1) {
        fillCombo();

    }

    else if(index==2) {
        try {
            sql = "SELECT Job.jobID as 'Job ID', Employer.name as'Company', Job.title as 'Role', Job.description as 'Description', Job.type as 'Type', Job.benefits as 'Benefits', Job.closing as 'Closing Date' FROM Job INNER JOIN Employer ON Job.employerID=Employer.employerID ORDER BY Employer.name";
            pst = conn.prepareStatement(sql);
            rs = pst.executeQuery();
            TableModel model = DbUtils.resultSetToTableModel(rs);
            table_job.setModel(model);
            final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
            table_job.setRowSorter(sorter);
            JScrollPane pane = new JScrollPane(table_job);
            searchJob.addActionListener(new ActionListener(){
                public void actionPerformed(ActionEvent e) {
                String text = keyword.getText(); 
                if (text.length() == 0) {
                sorter.setRowFilter(null);
                 } else {
                  sorter.setRowFilter(RowFilter.regexFilter(text));


                  }
                 }             
             });

        }

        catch (Exception e) {
           e.printStackTrace();                
        }


    }

当我处于index 2模式时，table_job内容被删除，即返回索引0，表变为空，而最初表示数据充满。当我在索引2中时，我不希望table_job为空，而是仍然继续显示数据，除非在keyword中输入JTextField，调整{{1搜索匹配。但table_job没有显示任何内容。我在索引2的if块中的代码片段中做错了什么，也许我在其他地方错了？

Answer 1

作为参考，此完整example说明使用setModel()更改TableModel 整体。更新是自动的。还可以考虑使用DefaultTableModel的方法来改变模型。

用搜索替换表内容

1 个答案: