我在尝试创建Web应用程序时感到困惑，并且由于办公惯例，我在尝试创建Java Web应用程序时使用Maven / Jetty / Eclipse设置。
在我的命令窗口中，我正在尝试通过键入mvn jetty：run来编译和运行。在我（很可能）相关的构建失败之前，这会导致很多警告。我希望在继续之前解决这些错误，即使它们不是构建失败的原因。
警告消息似乎表明我缺少对插件版本的声明，而我尝试搜索帮助的建议也是如此。但我确实定义了版本。我的另一个担忧是错误表明警告即。来自第13行。这是一个空行。我担心可能存在一些更新问题或重复的pom.xml文件，但另一方面，编译器确实对我的编辑做了反应，我知道。
我的错误信息是：
H:\projects\releaseplan>mvn jetty:run
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for releaseplan:releaseplan-model:jar:5
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ releaseplan:releaseplan:5, H:\projects\releaseplan\pom.xml, line 13, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-source-plugin is missing. @ releaseplan:releaseplan:5, H:\projects\releaseplan\pom.xml, line 22, column 15
[WARNING]
[WARNING] Some problems were encountered while building the effective model for releaseplan:releaseplan-server:war:5
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ releaseplan:releaseplan:5, H:\projects\releaseplan\pom.xml, line 13, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-source-plugin is missing. @ releaseplan:releaseplan:5, H:\projects\releaseplan\pom.xml, line 22, column 15
[WARNING]
[WARNING] Some problems were encountered while building the effective model for releaseplan:releaseplan:pom:5
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 13, column 15
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-source-plugin is missing. @ line 22, column 15
整个pom.xml，以防错误出现在某个地方我不指望它：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>releaseplan</groupId>
<artifactId>releaseplan</artifactId>
<version>1</version>
<packaging>pom</packaging>
<name>releaseplan</name>
<build>
<plugins>
<!--<plugin> <groupId>ro.isdc.wro4j</groupId> <artifactId>wro4j-maven-plugin</artifactId>
<version>${wro4j.version}</version> <executions> <execution> <goals> <goal>jshint</goal>
</goals> </execution> </executions> <configuration> <options>devel,evil,noarg</options>
</configuration> </plugin> -->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<!-- Jetty Version: 8.x Home: Eclipse, Codehaus Java Version: 1.6 Protocols:
HTTP/1.1 RFC2616, WebSocket, SPDY Servlet Version: 3.0 JSP Version: 2.1 http://wiki.eclipse.org/Jetty -->
<artifactId>jetty-maven-plugin</artifactId>
<version>8.1.13.v20130916</version>
<configuration>
<webAppConfig>
<contextPath>/</contextPath>
</webAppConfig>
<scanIntervalSeconds>1</scanIntervalSeconds>
</configuration>
</plugin>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<echo>********************************************</echo>
<echo>***** This project REQUIRES Maven 3.0+ *****</echo>
<echo>********************************************</echo>
<echo>mvn jetty:run - Running as un-assembled webapp</echo>
<echo>mvn jetty:run-war - Running as assembled webapp</echo>
</tasks>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<!-- <dependency> <groupId>com.dyuproject.protostuff</groupId> <artifactId>protostuff-core</artifactId>
<version>${protostuff.version}</version> </dependency> <dependency> <groupId>com.dyuproject.protostuff</groupId>
<artifactId>protostuff-json</artifactId> <version>${protostuff.version}</version>
</dependency> -->
<dependency>
<groupId>org.mortbay.jetty</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>${jackson.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<modules>
<module>model</module>
<module>server</module>
</modules>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<compiler.source>1.5</compiler.source>
<compiler.target>1.5</compiler.target>
<junit.version>4.4</junit.version>
<servlet.version>2.5-20081211</servlet.version>
<jetty.version>6.1.24</jetty.version>
<protobuf.version>2.3.0</protobuf.version>
<jackson.version>1.7.9</jackson.version>
<protostuff.version>1.0.2-SNAPSHOT</protostuff.version>
</properties>
<repositories>
<repository>
<id>java</id>
<name>java</name>
<url>http://download.java.net/maven/2/</url>
</repository>
<repository>
<id>repo1</id>
<name>repo1</name>
<url>http://repo1.maven.org/maven2</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>central</id>
<name>Maven Plugin Repository</name>
<url>http://repo1.maven.org/maven2</url>
<layout>default</layout>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
</pluginRepository>
</pluginRepositories>
</project>
答案 0 :(得分：14)
你可能会使用需要知道所有插件版本的Maven 3，如下所述：https://cwiki.apache.org/confluence/display/MAVEN/Maven+3.x+Compatibility+Notes#Maven3.xCompatibilityNotes-AutomaticPluginVersionResolution
添加父pom.xml的 pluginManagement 部分，所有插件版本都是正确的方法。 （在企业中）最好的方法是使用所有项目使用的企业父pom.xml文件。
实际上，在父pom.xml 属性部分添加以下行：
<maven-compiler-plugin.version>3.0</maven-compiler-plugin.version>
在您的父pom.xml中添加以下行 build＆gt; pluginManagement 部分：
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
</plugin>
希望它有所帮助...