No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in t

刺骨的言语ヽ痛彻心扉 2023-09-25 20:38 62阅读 0赞

#### 文章目录 ####

*  1. 复现错误
 *  2. 分析错误
 *  3. 解决错误

![在这里插入图片描述][7a2aaa2dd58345a6b5f2b21a0d0c0afc.png]

## 1. 复现错误 ##

今天在命令框中输入`mvn`，却报出如下图所示的错误：

![在这里插入图片描述][50dea699e3be455cab6c89ceff15e1d4.png]

> No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format : or :\[:\]:. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> \[Help 1\]

## 2. 分析错误 ##

正赶上`ChatGPT`比较火，可以借助它来帮我分析错误：

![在这里插入图片描述][fe1971defbcf451f844eb88c37025755.png]

从`ChatGPT`的回答来看，它告诉我`maven`的声明周期，这显然无法解决的问题，只能通过自己的分析来解决了。

1.  首先，输入如下命令：

java -version

检查是否成功安装`java`

![在这里插入图片描述][3673d7f9f024420d843a6217dc3f8626.png]

显然，已成功安装了`java`

1.  其次，输入如下命令：

mvn -v

检查是否成功安装了`maven`

![在这里插入图片描述][6237b479f04e40c2884341441f40ac8a.png]

显然，也安装了`maven`。

既然安装了`maven`和`java`，为什么报出上述错误呢？

只能求助网上来解决该错误了。

网上说缺少一个指定的`goal`，需要在项目的`pom.xml`文件中，添加一项`goal`数据，如下代码所示：

<defaultGoal>compile</defaultGoal>

## 3. 解决错误 ##

既然在项目的`pom.xml`文件中，缺少一个指定的`goal`，添加如下的`goal`数据：

![在这里插入图片描述][172b43a27fe648d78ee17a34c83298e0.png]

接着重新执行`install`，执行结果如下：

![在这里插入图片描述][6755e3d5d4ff4890a388a64dc8a11770.png]

[7a2aaa2dd58345a6b5f2b21a0d0c0afc.png]: https://img-blog.csdnimg.cn/7a2aaa2dd58345a6b5f2b21a0d0c0afc.png
[50dea699e3be455cab6c89ceff15e1d4.png]: https://img-blog.csdnimg.cn/50dea699e3be455cab6c89ceff15e1d4.png
[fe1971defbcf451f844eb88c37025755.png]: https://img-blog.csdnimg.cn/fe1971defbcf451f844eb88c37025755.png
[3673d7f9f024420d843a6217dc3f8626.png]: https://img-blog.csdnimg.cn/3673d7f9f024420d843a6217dc3f8626.png
[6237b479f04e40c2884341441f40ac8a.png]: https://img-blog.csdnimg.cn/6237b479f04e40c2884341441f40ac8a.png
[172b43a27fe648d78ee17a34c83298e0.png]: https://img-blog.csdnimg.cn/172b43a27fe648d78ee17a34c83298e0.png
[6755e3d5d4ff4890a388a64dc8a11770.png]: https://img-blog.csdnimg.cn/6755e3d5d4ff4890a388a64dc8a11770.png

No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in t

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