Java命令行界面：使用'\r'在不同的行上具有多个进度条 [英] Java command line interface: having multiple progress bars on different lines using '\r'

问题描述

我正在编写的程序的命令行界面的一部分，要求多个进度条。我目前可以使用 \r 转义序列在控制台中更新一行，类似于以下内容：

Part of the command line interface for a program I'm writing calls for multiple progress bars. I can currently update a single line in the console by using the \r escape sequence with something similar to this:

System.out.printf("\rProcess is %d%% complete", percentageComplete);

不过，回车只返回到该行的开头。我想要一种退回两行（或更普遍地说，任意数量的行）并同时更新它们的方法。

However the carriage return only goes back to the start of that line. I want a way of going back two lines (or more generally, any number of lines) and have them both/all update.

有什么办法吗？

推荐答案

我为命令行进度条编写了一个小项目，该项目可以执行一个划线员或主/细节操作-参见 https://github.com/tomas-langer/cli/tree/ master / cli-progress 。它也可以在Windows上使用-将ANSI转义序列与MS Windows的本机实现一起使用（Chalk + Jansi）

I have written a small project for command line progress bars that can do either one liners or a "master/detail" - see https://github.com/tomas-langer/cli/tree/master/cli-progress. It works also on Windows - using ANSI escape sequences with native implementation for MS Windows (Chalk + Jansi)

如果您想做更多的事情，请检查Chalk库（ https://github.com/tomas-langer/chalk ），而后者又使用了Jansi（在前面已经提到过）

If you want to do more, check the Chalk library (https://github.com/tomas-langer/chalk) that in turn uses Jansi (mentioned already in previous posts).

排队和清除行的ansi转义代码在Chalk库中。
要使用它们：

The ansi escape code for line up and clear line are in Chalk library. To use them:

import com.github.tomaslanger.chalk.Ansi;
...
System.out.print(Ansi.cursorUp(2)); //move cursor up two lines
System.out.print(Ansi.eraseLine()); //erase current line

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