Question

我做了一个简单的注册和登录页面。用户成功注册或登录后，将显示一条消息，显示结果。

这工作正常，但我希望文本只显示几秒钟。所以5秒后文字就消失了。

        int i = ps.executeUpdate();
        if (i > 0) {
            out.print("Successfully logged in...");
            RequestDispatcher rs =    request.getRequestDispatcher("/loggedin.html");
            rs.include(request, response);
        }

我已经在线搜索过，但我找不到任何关于如何操作的信息。欢迎任何提示/评论！

Answer 1

要删除您打印的内容，您可以打印退格字符\b。

为了满足您的需求：

String s = "Successfully logged in...";
// better use System.out.print() than out.print() *
System.out.print(s);  
Thread.sleep(2000); // Wait 2 seconds

// print as backspaces as charactes printed using CommonLangs
StringUtils.repeat("\b", s.length);    

// print as backspaces as charactes printed with for loop
for (i = 0; i < s.length; i++) {
    System.out.print("\b");
}

注意：这在Eclipse控制台中不起作用。但在命令控制台中工作得很好。另请参阅How to get backspace \b to work in Eclipse's console?

* better use System.out.print() than out.print()

仅显示文本几秒钟

1 个答案: