英文:

How to configure VSCode to run Java MAVEN applications with parameters?

问题

我有一个没有主方法的代码。该项目是使用以下命令执行的：

```shellscript
$mvn clean install -Dparam1="folder" -Dparam2="path"

在Eclipse或IntelliJ中，我只需创建一个Maven执行器，将goas定义为clean install，并使用-Dparam格式传递Maven参数。

在VSCode中，我看到了3种不同的方法，并尝试了以下操作：

1. 创建一个名为launch.json的文件，调用命令mvn或mvnDebug在preLaunchTask中。

{
  "version": "0.2.0",
  "configurations": [
    {
        "type": "java",
        "request": "launch",
        ...
        "preLaunchTask": "mvnDebug",
        "vmArgs": [ "clean", "install", "-Dparam1=\"blabla\"", "-Dparam2=\"blablabla\"" ]

    }
  ]
}

我还尝试了将所有命令都传递给preLaunchTask而没有使用vmArgs。但是并未成功。

2. 创建一个名为task.json的文件，传递脚本，以及一个launch.json文件，在其中在preLaunchTask中调用以task.json中的taskName参数定义的任务。

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "request": "launch",
            "preLaunchTask": "Debug",
            "name": "Launch Program",
            "sourceMaps": true
        }
    ]
}

以及tasks.json：

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Debug",
            "type": "java",
            "script": "mvnDebug clean install -Dparam1=\"folderName\" -Dparam2=\"blablabla\"",
            "problemMatcher": []
        }
    ]
}

3. 我尝试的第三种方法是使用settings.json：

{
    "maven.terminal.favorites": [
        {
            "alias": "CLEAN COMPILE",
            "command": "clean install -Dparam1=\"value\" -Dparam2=\"blabla\"",
            "debug": true
        },
    ]
}

对于所有这些方法，我在终端中得到了以下消息：

Listening for transport dt_socket at address: 56787

我需要从你这里获得的信息是：

1）这个消息的含义是什么？
2）为什么它在等待端口？
3）VSCode如何使用套接字进行此操作？
4）最佳方法是什么，为什么？
5）最重要的问题：如何在没有主函数的情况下在VSCode中运行带有JAVA MAVEN参数的代码？

注意：我的JAVA版本是JDK11，但我也尝试过JDK 8。

非常感谢。

<details>
<summary>英文:</summary>

I have a code without main method. The project was executed using the following command:

```shellscript
$mvn clean install -Dparam1=&quot;folder&quot; -Dparam2=&quot;path&quot;

In Eclipse or IntelliJ, I just need to create a maven executor, define the goas as clean install and pass the maven parameters using the -Dparam format.

In VSCode, I have saw 3 different approaches and experimented the following:

1. Create a lunch.json file calling the command mvn or mvnDebug in the preLaunchTask.

{
  "version": "0.2.0",
  "configurations": [
    {
        "type": "java",
        "request": "launch",
        ...
        "preLaunchTask": "mvnDebug",
        "vmArgs": [ "clean", "install", "-Dparam1=\"blabla\"", "-Dparam2=\"blablabla\"" ]

    }
  ]
}

I also have tested passing all the commands in the preLaunchTask without the vmArgs. And did not work.

2. Creating a task.json file passing the script and a launch.json file which will call in preLaunchTask the task created with the name defined in the parameter taskName of task.json.

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "request": "launch",
            "preLaunchTask": "Debug",
            "name": "Launch Program",
            "sourceMaps": true
        }
    ]

And the tasks.json:

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Debug",
            "type": "java",
            "script": "mvnDebug clean install -Dparam1=\"folderName\" -Dparam2=\"blablabla\"",
            "problemMatcher": []
        }
    ]
}

3. The 3rd approache I've tried was using settings.json:

{
    "maven.terminal.favorites": [
        {
            "alias": "CLEAN COMPILE",
            "command": "clean install -Dparam1=\"value\" -Dparam2=\"blabla\"",
            "debug": true
        },
    ]
}

For all of them I got the message in the terminal:

Listening for transport dt_socket at address: 56787

What I need from you, guys, is:

1. What does this message means?
2. Why is it waiting for a port?
3. How does VSCode use a socket to do it?
4. What is the best approach and why?
5. THE MOST IMPORTANT ONE: How to run my JAVA MAVEN parameterized without a main function code using VSCode?

OBSERVATION: My JAVA version is JDK11, but I've tried with JDK 8 too.

Thank you a lot.

答案1

得分: 5

1. 在 launch.json 中，属性 vmArgs 是

> 用于 JVM 的额外选项和系统属性（例如 -Xms<size> -Xmx<size> -D<name>=<value>），它可以接受一个字符串或字符串数组。
debugging-launch

因此它对于你的应用程序不起作用。

2. 在 tasks.json 中，属性 command 用于指定要执行的命令；

> 自定义任务

3. 建议使用设置 maven.executable.options，它为所有 mvn 命令指定了默认选项。
   > vscode-maven

英文:

1.In launch.json, the attribute vmArgs is

> The extra options and system properties for the JVM (for example
> -Xms<size> -Xmx<size> -D<name>=<value>), it accepts a string or an array of string.
debugging-launch

so it won't work for your application.

2.In tasks.json, the attribute command is for the command to execute;

> Custome Tasks

3.It's recomended to use the setting maven.executable.options
, which specifies default options for all mvn commands.
>vscode-maven