问题描述
当我创建一个Spring Boot应用程序时，我可以在项目的根目录中看到mvnw和mvnw.cmd文件.这两个文件的目的是什么?
When I created a Spring Boot application I could see mvnw and mvnw.cmd files in the root of the project. What is the purpose of these two files?
推荐答案
这些文件来自 Maven包装器.它的作用类似于 Gradle包装器.
These files are from Maven wrapper. It works similarly to the Gradle wrapper.
这使您可以运行Maven项目，而无需安装Maven并将其显示在路径上.如果找不到Maven版本，它将下载正确的Maven版本(据我所知，默认情况下在您的用户主目录中).
This allows you to run the Maven project without having Maven installed and present on the path. It downloads the correct Maven version if it's not found (as far as I know by default in your user home directory).
mvnw文件用于Linux(bash)，而mvnw.cmd文件用于Windows环境.
The mvnw file is for Linux (bash) and the mvnw.cmd is for the Windows environment.
要创建或更新所有必需的Maven包装器文件，请执行以下命令:
To create or update all necessary Maven Wrapper files execute the following command:
mvn -N io.takari:maven:wrapper
要使用其他版本的Maven，您可以指定以下版本:
To use a different version of maven you can specify the version as follows:
mvn -N io.takari:maven:wrapper -Dmaven=3.3.3
两个命令都需要PATH上的maven(将maven bin的路径添加到系统变量上的Path)，如果您的项目中已经有mvnw，则可以在命令中使用./mvnw而不是mvn
Both commands require maven on PATH (add the path to maven bin to Path on System Variables) if you already have mvnw in your project you can use ./mvnw instead of mvn in the commands.
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