检查控制台是否支持Java中的ANSI转义码

时间：2016-12-09 09:24:35

标签： java ansi

我正在用Java构建一个程序，它使用ANSI转义码使用不同颜色的菜单。像

这样的东西 
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    "type": "Sunset",
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  {
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    "utctime": "December 10, 2016 03:00:00",
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    "time": 1481339475,
    "type": "High",
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    "height": 4.44
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  {
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    "height": 2.156115
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  {
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    "time": 1481356800,
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    "utctime": "December 10, 2016 08:00:00",
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    "height": 1.649912
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    "Rawtime": "December 10, 2016 03:00:00",
    "height": 2.983297
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    "time": 1481371200,
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    "utctime": "December 10, 2016 12:00:00",
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    "height": 4.113031
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  {
    "Localtime": "2016-12-10 05:00:00",
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    "type": "NORMAL",
    "utctime": "December 10, 2016 13:00:00",
    "Rawtime": "December 10, 2016 05:00:00",
    "height": 5.240836
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  {
    "Localtime": "2016-12-10 06:00:00",
    "time": 1481378400,
    "type": "NORMAL",
    "utctime": "December 10, 2016 14:00:00",
    "Rawtime": "December 10, 2016 06:00:00",
    "height": 6.122298
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  {
    "Localtime": "2016-12-10 07:00:00",
    "time": 1481382000,
    "type": "NORMAL",
    "utctime": "December 10, 2016 15:00:00",
    "Rawtime": "December 10, 2016 07:00:00",
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    "height": 0
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  {
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    "utctime": "December 10, 2016 23:00:00",
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  {
    "Localtime": "2016-12-10 04:00:00",
    "time": 1481414400,
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    "height": 1.287361
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    "Rawtime": "December 10, 2016 16:51:14",
    "height": 0
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  {
    "Localtime": "2016-12-10 05:00:00",
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    "utctime": "December 11, 2016 01:00:00",
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    "height": 2.328355
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  {
    "Localtime": "2016-12-10 06:00:00",
    "time": 1481421600,
    "type": "NORMAL",
    "utctime": "December 11, 2016 02:00:00",
    "Rawtime": "December 10, 2016 18:00:00",
    "height": 3.365122
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  {
    "Localtime": "2016-12-10 07:00:00",
    "time": 1481425200,
    "type": "NORMAL",
    "utctime": "December 11, 2016 03:00:00",
    "Rawtime": "December 10, 2016 19:00:00",
    "height": 4.192768
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  {
    "Localtime": "2016-12-10 08:00:00",
    "time": 1481428800,
    "type": "NORMAL",
    "utctime": "December 11, 2016 04:00:00",
    "Rawtime": "December 10, 2016 20:00:00",
    "height": 4.633698
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  {
    "Localtime": "2016-12-10 08:23:35",
    "time": 1481430215,
    "type": "High",
    "utctime": "December 11, 2016 04:23:35",
    "Rawtime": "December 10, 2016 20:23:35",
    "height": 4.67
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  {
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    "time": 1481432400,
    "type": "NORMAL",
    "utctime": "December 11, 2016 05:00:00",
    "Rawtime": "December 10, 2016 21:00:00",
    "height": 4.578441
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  {
    "Localtime": "2016-12-10 10:00:00",
    "time": 1481436000,
    "type": "NORMAL",
    "utctime": "December 11, 2016 06:00:00",
    "Rawtime": "December 10, 2016 22:00:00",
    "height": 4.046519
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  {
    "Localtime": "2016-12-10 11:00:00",
    "time": 1481439600,
    "type": "NORMAL",
    "utctime": "December 11, 2016 07:00:00",
    "Rawtime": "December 10, 2016 23:00:00",
    "height": 3.218655
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  {
    **"Localtime": "2016-12-11 12:00:00",**
    "time": 1481443200,
    "type": "NORMAL",
    "utctime": "December 11, 2016 08:00:00",
    "Rawtime": "December 11, 2016 00:00:00",
    "height": 2.395649
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  {
    "Localtime": "2016-12-11 01:00:00",
    "time": 1481446800,
    "type": "NORMAL",
    "utctime": "December 11, 2016 09:00:00",
    "Rawtime": "December 11, 2016 01:00:00",
    "height": 1.888912
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  {
    "Localtime": "2016-12-11 01:28:53",
    "time": 1481448533,
    "type": "Low",
    "utctime": "December 11, 2016 09:28:53",
    "Rawtime": "December 11, 2016 01:28:53",
    "height": 1.82
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  {
    "Localtime": "2016-12-11 02:00:00",
    "time": 1481450400,
    "type": "NORMAL",
    "utctime": "December 11, 2016 10:00:00",
    "Rawtime": "December 11, 2016 02:00:00",
    "height": 1.900692
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  {
    "Localtime": "2016-12-11 03:00:00",
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    "type": "NORMAL",
    "utctime": "December 11, 2016 11:00:00",
    "Rawtime": "December 11, 2016 03:00:00",
    "height": 2.460855
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  {
    "Localtime": "2016-12-11 04:00:00",
    "time": 1481457600,
    "type": "NORMAL",
    "utctime": "December 11, 2016 12:00:00",
    "Rawtime": "December 11, 2016 04:00:00",
    "height": 3.443584
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  {
    "Localtime": "2016-12-11 05:00:00",
    "time": 1481461200,
    "type": "NORMAL",
    "utctime": "December 11, 2016 13:00:00",
    "Rawtime": "December 11, 2016 05:00:00",
    "height": 4.630794
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  {
    "Localtime": "2016-12-11 06:00:00",
    "time": 1481464800,
    "type": "NORMAL",
    "utctime": "December 11, 2016 14:00:00",
    "Rawtime": "December 11, 2016 06:00:00",
    "height": 5.769447
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  {
    "Localtime": "2016-12-11 07:00:00",
    "time": 1481468400,
    "type": "NORMAL",
    "utctime": "December 11, 2016 15:00:00",
    "Rawtime": "December 11, 2016 07:00:00",
    "height": 6.600818
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  {
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    "time": 1481469347,
    "type": "Sunrise",
    "utctime": "December 11, 2016 15:15:47",
    "Rawtime": "December 11, 2016 07:15:47",
    "height": 0
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  {
    "Localtime": "2016-12-11 07:55:45",
    "time": 1481471745,
    "type": "High",
    "utctime": "December 11, 2016 15:55:45",
    "Rawtime": "December 11, 2016 07:55:45",
    "height": 6.89
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  {
    "Localtime": "2016-12-11 08:00:00",
    "time": 1481472000,
    "type": "NORMAL",
    "utctime": "December 11, 2016 16:00:00",
    "Rawtime": "December 11, 2016 08:00:00",
    "height": 6.885445
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  {
    "Localtime": "2016-12-11 09:00:00",
    "time": 1481475600,
    "type": "NORMAL",
    "utctime": "December 11, 2016 17:00:00",
    "Rawtime": "December 11, 2016 09:00:00",
    "height": 6.458388
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  {
    "Localtime": "2016-12-11 10:00:00",
    "time": 1481479200,
    "type": "NORMAL",
    "utctime": "December 11, 2016 18:00:00",
    "Rawtime": "December 11, 2016 10:00:00",
    "height": 5.311423
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  {
    "Localtime": "2016-12-11 11:00:00",
    "time": 1481482800,
    "type": "NORMAL",
    "utctime": "December 11, 2016 19:00:00",
    "Rawtime": "December 11, 2016 11:00:00",
    "height": 3.648872
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  {
    "Localtime": "2016-12-11 12:00:00",
    "time": 1481486400,
    "type": "NORMAL",
    "utctime": "December 11, 2016 20:00:00",
    "Rawtime": "December 11, 2016 12:00:00",
    "height": 1.85591
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  {
    "Localtime": "2016-12-11 01:00:00",
    "time": 1481490000,
    "type": "NORMAL",
    "utctime": "December 11, 2016 21:00:00",
    "Rawtime": "December 11, 2016 13:00:00",
    "height": 0.370124
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  {
    "Localtime": "2016-12-11 02:00:00",
    "time": 1481493600,
    "type": "NORMAL",
    "utctime": "December 11, 2016 22:00:00",
    "Rawtime": "December 11, 2016 14:00:00",
    "height": -0.4807
  },
  {
    "Localtime": "2016-12-11 02:38:11",
    "time": 1481495891,
    "type": "Low",
    "utctime": "December 11, 2016 22:38:11",
    "Rawtime": "December 11, 2016 14:38:11",
    "height": -0.63
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  {
    "Localtime": "2016-12-11 03:00:00",
    "time": 1481497200,
    "type": "NORMAL",
    "utctime": "December 11, 2016 23:00:00",
    "Rawtime": "December 11, 2016 15:00:00",
    "height": -0.581912
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  {
    "Localtime": "2016-12-11 04:00:00",
    "time": 1481500800,
    "type": "NORMAL",
    "utctime": "December 12, 2016 00:00:00",
    "Rawtime": "December 11, 2016 16:00:00",
    "height": -0.025588
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  {
    "Localtime": "2016-12-11 04:51:25",
    "time": 1481503885,
    "type": "Sunset",
    "utctime": "December 12, 2016 00:51:25",
    "Rawtime": "December 11, 2016 16:51:25",
    "height": 0
  },
  {
    "Localtime": "2016-12-11 05:00:00",
    "time": 1481504400,
    "type": "NORMAL",
    "utctime": "December 12, 2016 01:00:00",
    "Rawtime": "December 11, 2016 17:00:00",
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  {
    "Localtime": "2016-12-11 06:00:00",
    "time": 1481508000,
    "type": "NORMAL",
    "utctime": "December 12, 2016 02:00:00",
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  {
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    "type": "NORMAL",
    "utctime": "December 12, 2016 03:00:00",
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    "height": 3.386593
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  {
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    "type": "NORMAL",
    "utctime": "December 12, 2016 04:00:00",
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    "height": 4.351603
  },
  {
    "Localtime": "2016-12-11 09:00:00",
    "time": 1481518800,
    "type": "NORMAL",
    "utctime": "December 12, 2016 05:00:00",
    "Rawtime": "December 11, 2016 21:00:00",
    "height": 4.883885
  }
  // etc
]

问题是我想检查要执行代码的控制台是否支持使用此代码，所以如果没有，请打印没有代码的替代版本。

它将类似于：

System.out.println("\u001B[36m"+"Menu option"+"\u001B[0m");

java中是否有方法可以检查这个？

2 个答案:

答案 0 :(得分：4)

一个简单的纯Java解决方案：

if (System.console() != null && System.getenv().get("TERM") != null) {
    System.out.println("\u001B[36m"+"Menu option"+"\u001B[0m");
} else {
    System.out.println("Menu option");
}

第一个术语用于检查是否连接了终端，第二个术语用于查看是否已定义TERM env var（在Windows上不是）。这不是完美的方法，但是对于我来说效果很好。

答案 1 :(得分：1)

我不知道Java是否有一些特殊的方法可以解决这个问题，但有两种方法可以解决问题本身。使用的常用方法（至少在unix世界中）是从TERM环境变量中获取终端，并从terminfo / termcap数据库中查找它的功能（通常使用{ {3}}或curses）。另一种更粗略的方法是发送设备状态报告代码（"\u001B[6n"）并检查终端是否响应。这当然有点像黑客，因为支持DSR代码的终端可能不支持颜色。例如。

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