Maven 文件路径参数 exec

Question

这是我的文件结构。

├── algs4-data
├── src
│   ├── main
│   └── test
└── target
    ├── classes
    ├── maven-archiver
    ├── surefire
    ├── surefire-reports
    └── test-classes

我想用路径参数和管道传递文件名。但是我失败了，我该怎么办？

mvn exec:java -Dexec.mainClass="edu.princeton.cs.algs4.BinarySearch" \ -Dexec.args="algs4-data/tinyW.txt < algs4-data/tinyT.txt"

更新：日志信息

它只显示这个，我必须按 Ctrl-C

➜ java_algs4 git:(master) ✗ mvn exec:java -Dexec.mainClass="edu.princeton.cs.algs4.BinarySearch" \ > -Dexec.args="algs4-data/tinyW.txt < algs4-data/tinyT.txt" [INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building algs4 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- exec-maven-plugin:1.5.0:java (default-cli) @ algs4 ---

2016 年 6 月 15 日更新

感谢Mr.Baumgartner建议我将数据移动到 /src/main/resources

但是当我运行代码时，它给出了警告和构建失败。

[INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building algs4 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- exec-maven-plugin:1.5.0:java (default-cli) @ algs4 --- [WARNING] java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.mojo.exec.ExecJavaMojo.run(ExecJavaMojo.java:294) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.IllegalArgumentException: Could not open algs4-data/tinyW.txt at edu.princeton.cs.algs4.In.<init>(In.java:194) at edu.princeton.cs.algs4.BinarySearch.main(BinarySearch.java:91) ... 6 more [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.821s [INFO] Finished at: Wed Jun 15 09:29:50 CDT 2016 [INFO] Final Memory: 12M/94M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.5.0:java (default-cli) on project algs4: An exception occured while executing the Java class. null: InvocationTargetException: Could not open algs4-data/tinyW.txt -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

更新文件结构。

. ├── src │ ├── main │ │ ├── java │ │ │ └── edu │ │ └── resources │ │ └── algs4-data │ └── test │ └── java │ └── edu └── target ├── classes │ ├── algs4-data │ └── edu │ └── princeton ├── maven-archiver ├── site │ ├── css │ └── images │ └── logos ├── surefire ├── surefire-reports └── test-classes └── edu └── princeton

Answer 1

使用您的文件结构 algs4-data 不可见。当您启动您的应用程序时，执行的根是目标文件夹。通过不将 algs4-data 放入 /src/main/resources 之类的 src 文件夹中，它不会被复制到 target/classes 中。

在不知道您的代码或测试的情况下应该可以工作的解决方案：将 algs4-data 复制到 src/main/resources。

Maven 文件路径参数 exec

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