java - 当我通过 java 应用程序中的进程运行 pg_restore 时，应用程序卡住

Question

当我通过 java 应用程序中的进程运行 pg_restore 时，应用程序卡住和信息消息不显示，但进程已成功完成。为什么会这样？我使用 PostgreSQL 9.2。

方法代码:

private void restoreDB() {

    JFileChooser fileopen = new JFileChooser();   
    FileNameExtensionFilter filter = new FileNameExtensionFilter("DB FILES", "sql");
    fileopen.addChoosableFileFilter(filter);
    fileopen.setCurrentDirectory(new java.io.File("C:/backups/"));
    fileopen.setDialogTitle("Выберите папку для резервной копии");
    fileopen.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
    fileopen.setAcceptAllFileFilterUsed(false);   
    int ret = fileopen.showDialog(null, "Restore DB");                
    if (ret == JFileChooser.APPROVE_OPTION) {
        File file = fileopen.getSelectedFile();
        try {
            String path = file.getAbsolutePath();
            System.out.println(path);
            String user = "postgres";
            String dbName = "Auto";
            String executeCmd = "pg_restore -i -U " + user + " -d " + dbName+" -v "+ path;
            Process runtimeProcess;
            runtimeProcess = Runtime.getRuntime().exec(executeCmd);
            int processComplete = runtimeProcess.waitFor();

            if (processComplete == 0) {
                javax.swing.JOptionPane.showMessageDialog(null, "Successfull!");
                log.info("Successfull!");
            } else {
                javax.swing.JOptionPane.showMessageDialog(null, "Unsuccessfully");
                log.info("Unsuccessfully");
            }
    }catch (Exception ex) {
        ex.printStackTrace();
    }
}

}

Answer 1

不要阻塞 EDT(事件调度线程)——当发生这种情况时，GUI 将“卡住”。不是调用 Thread.sleep(n) 而是实现一个 Swing Timer 用于重复任务或一个 SwingWorker 用于长时间运行的任务。参见 Concurrency in Swing了解更多详情。