文件选择

    一个SWT文件，实现选择文件，显示文件功能，代码和实现的结果如下：

FileSelection
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.*;

public class FileSelection 
{
    Display display = new Display();
    Shell shell = new Shell();
    Label fileLabel;
    Button selectFileButton;
    String filePath = "c:\\";
    
    public FileSelection()
    {
        fileLabel = new Label(shell,SWT.BORDER|SWT.WRAP);
        fileLabel.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
        fileLabel.setText("选择文件");
        selectFileButton = new Button(shell,SWT.PUSH);
        selectFileButton.setText("请选择文件");
        
        selectFileButton.addListener(SWT.Selection, new Listener(){
            public void handleEvent(Event event)
            {
                FileDialog fileDialog = new FileDialog(shell,SWT.MULTI);
                fileDialog.setFilterPath(filePath);
                fileDialog.setFilterExtensions(new String[]{"*.txt","*.html","*.*"});
                fileDialog.setFilterNames(new String[]{"文本文件","HTML文件","任何"});
                String firstFile = fileDialog.open();
                if(firstFile!=null)
                {
                    filePath = fileDialog.getFilterPath();
                    String selectedFiles[] = fileDialog.getFileNames();
                    StringBuffer sb = new StringBuffer("你选择了如下的文件"
                            +fileDialog.getFilterPath()+"\\ \n");
                    for(int i=0; i<selectedFiles.length;i++)
                    {
                        sb.append(selectedFiles[i]+"\n");
                    }
                    fileLabel.setText(sb.toString());
                }
            }
        });
        
        fileLabel.setBounds(0,0,400,100);
        selectFileButton.setBounds(100,110,200,25);
        shell.pack();
        shell.open();
        
        while(!shell.isDisposed())
        {
            if(!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
    
    public static void main(String args[])
    {
        new FileSelection();
    }
}

运行结果：

根据路径打开文件：

显示选中的文件：