FileInputStream无法使用特定的`user.dir`值

Question

项目使用 maven 构建及其文件结构如下。

fnlp
├── fnlp-app
├── fnlp-core
├── models
│   └── seg.m
└── tmp
    └── lucene

现在，我将工作目录切换到子模块fnlp-app并设置VM OPTIONS
-Duser.dir=$MODULE_DIR$ 。

Directory dir = FSDirectory.open(new File("../tmp/lucene"));

使用FSDirectory.open时，它可以获得预期的结果。

FileInputStream fileInputStream = new FileInputStream(new File("../models/seg.m"));  

然而，执行上面的代码，它得到 java.io.FileNotFoundException：../ model / seg.m（没有这样的文件或目录）

简单的测试代码片段和日志。（感谢@ jon-skeet的建议。）

    System.out.println(System.getProperty("user.dir"));
    // Output: /home/xohozu/workbench/git/github/fnlp/fnlp-app

    System.out.println(new File("./models/seg.m").getCanonicalPath());
    // Output: /home/xohozu/workbench/git/github/fnlp/fnlp-app/models/seg.m

    FileInputStream inSteam1 = new FileInputStream(new File("./models/seg.m"));
    // Passed

    FileInputStream inSteam11 = new FileInputStream(new File("/home/xohozu/workbench/git/github/fnlp/fnlp-app/models/seg.m"));
    // Exception in thread "main" java.io.FileNotFoundException: /home/xohozu/workbench/git/github/fnlp/fnlp-app/models/seg.m (No such file or directory)

    System.out.println(new File("../models/seg.m").getCanonicalPath());
    // Output: /home/xohozu/workbench/git/github/fnlp/models/seg.m

    FileInputStream inSteam2 = new FileInputStream(new File("../models/seg.m"));
    // Exception in thread "main" java.io.FileNotFoundException: ../models/seg.m (No such file or directory)

    FileInputStream inSteam22 = new FileInputStream(new File("/home/xohozu/workbench/git/github/fnlp/models/seg.m"));
    // Passed