自从我更新到Maven 3后,我在每次构建时都会收到以下警告消息:
我怎样才能摆脱这些警告呢?
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for proj:id:jar:3.1
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-javadoc-plugin is missing. @ line 195, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 204, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing. @ line 227, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-jar-plugin is missing. @ line 215, column 15
[WARNING] 'reporting.plugins.plugin.version' for org.codehaus.mojo:jdepend-maven-plugin is missing. @ line 271, column 15
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
在pom.xml文件中的<plugin> <artifactId>后面添加一个<version>元素。找到以下文本:
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
添加版本标签:
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
该警告应该得到解决。
关于这个:
“build.plugins.plugin。版本的
org.apache.maven。插件:maven-compiler-plugin缺失
很多人都提到了这个问题发生的原因,但没有提出解决方案。我所需要做的就是进入项目的POM文件,并添加如上所示的<version>标记。
要发现版本号,一种方法是在Maven运行结束后查看它的输出。如果您缺少版本号,Maven将显示其默认版本:
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ entities ---
获取该版本号(如上面的2.3.2所示)并将其添加到POM中,如所示。
获取最新版本信息:
https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin
点击最新版本(或你想要使用的版本),你会看到依赖信息(截至2019-05,它是3.8.1):
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
</dependency>
你可能想要为你的插件标签使用版本标签和注释。
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source />
<target />
</configuration>
</plugin>
如果您愿意,您可以修改您的pom,使版本信息在属性标签中,如在另一个答案中概述的那样。