如何在fileDialogue中打开具有特定扩展名的文件

Question

我正在尝试使用文件Dialog打开具有特定扩展名（.fcg或.wtg）的文件 有办法吗？

Answer 1

如果您可以使用JFileChooser，则可以使用JFileChooser.addChoosableFileFilter()按扩展名过滤文件。

    JFileChooser fileChooser = new JFileChooser();
    fileChooser.addChoosableFileFilter(new FileFilter() {

        @Override
        public String getDescription() {
            return "*.fct, *.wtg";
        }

        @Override
        public boolean accept(File f) {
            return f.getName().endsWith(".fcg") ||
            f.getName().endsWith(".wtg");
        }
    });

Answer 2

您可以使用此代码选择文件并阅读

public void openFile() throws Exception {
    int rowCount = 0;
    int rowNo = 2;
    String id = "";
    String name = "";
    JFileChooser fc = new JFileChooser();
    int result = fc.showOpenDialog(new JPanel());
    if (result == JFileChooser.APPROVE_OPTION) {
        String file = String.valueOf(fc.getSelectedFile());

        File fil = new File(file);
        System.out.println("File Selected" + file);
        FileInputStream fin = new FileInputStream(fil);
        int ch;
        while ((ch = fin.read()) != -1) {
            System.out.print((char)ch);
        }
    } else {
    }
}

Answer 3

由于这是谷歌搜索＃1对我来说，这是最适合我的解决方案：

How to restrict file choosers in java to specific files

细节：

    JFileChooser open = new JFileChooser(openPath);
    FileNameExtensionFilter filter = new FileNameExtensionFilter("PLSQL Files", "sql", "prc", "fnc", "pks"
                                                                    , "pkb", "trg", "vw", "tps" , "tpb");
    open.setFileFilter(filter);