java中的目录选择框和文件选择框【源】

1.目录选择框            

              JFileChooser chooser=new JFileChooser();

              chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);

             /**

             JFileChooser.DIRECTORIES_ONLY //只有目录

             JFileChooser.FILES_ONLY //只有文件

             JFileChooser.FILES_AND_DIRECTORIES //全部（默认值）

               */

              int result=chooser.showOpenDialog(null);

              String fname=chooser.getName(chooser.getSelectedFile());

              System.out.println("fname--->"+fname);

              if(result==JFileChooser.APPROVE_OPTION)

              {

                 

                   String filePath=chooser.getSelectedFile().getPath();

                   System.out.println("filePath--->"+filePath);

                   if(filePath.endsWith(".xml"))

                   {

                       System.out.println("filePath--->"+filePath);

                   }

              }

Object[] options = { "OK", "CANCEL" };

              int results= JOptionPane.showOptionDialog(null, "是否保存?", "Warning",

              JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,null, options, options[0]);

              if(results==JOptionPane.OK_OPTION)

              {

                  doSave();

              }

              if(results==JOptionPane.NO_OPTION )

              {

                   doReturn();

              }

2.文件选择框

        javax.swing.JFileChooser chooser = new javax.swing.JFileChooser();

        chooser.showOpenDialog(null);

          String fname=chooser.getName(chooser.getSelectedFile());