Maven POM 配置技巧(一)

一、排除传递依赖的某个jar，以避免版本冲突。例如: 开发工程中需要引用struts2(2.0.11.2)和freemarker(2.3.16)，但该struts2默认依赖的是freemarker(2.3.8)，可参考以下方式编写:view plain<dependency>      <groupId>org.apache.struts</groupId>      <artifactId>struts2-core</artifactId>      <version>2.0.11.2</version>      <type>jar</type>      <scope>compile</scope>      <exclusions>        <exclusion> <!-- 排除freemarker,以避免版本冲突 -->      <groupId>freemarker</groupId>      <artifactId>freemarker</artifactId>     </exclusion>   </exclusions>  </dependency>  <dependency>      <groupId>org.freemarker</groupId>      <artifactId>freemarker</artifactId>      <version>2.3.16</version>      <type>jar</type>      <scope>compile</scope>  </dependency>    二、发布jar包同时发布源码view plain    <plugin>  <groupId>org.apache.maven.plugins</groupId>  <artifactId>maven-source-plugin</artifactId>  <version>2.1.2</version>  <configuration>      <attach>true</attach>  </configuration>  <executions>      <execution>          <phase>compile</phase>          <goals>              <goal>jar</goal>          </goals>      </execution>  </executions>               </plugin>    三、Eclipse开发时，为方便使用内置tomcat调试，需将所依赖的jar包复制到WEB-INF/lib目录下。可通过以下配置:view plain<plugin>      <groupId>org.apache.maven.plugins</groupId>      <artifactId>maven-dependency-plugin</artifactId>      <version>2.1</version>      <executions>             <execution>                 <id>copy</id>                 <phase>package</phase>                 <goals>                     <goal>copy-dependencies</goal>                 </goals>                 <configuration>                     <outputDirectory>src/main/webapp/WEB-INF/lib</outputDirectory>                 </configuration>             </execution>          </executions>   </plugin>   配置完成后。每次有添加jar包依赖时，需运行一次mvn package命令。  四、有时工程中想复用其它工程中的静态内容(image/css/js)，为方便开发调试，需将相应的静态内容，解压缩到当前工程的webapp目录下。可通过以下配置:view plain<plugin>      <groupId>org.apache.maven.plugins</groupId>      <artifactId>maven-dependency-plugin</artifactId>      <version>2.1</version>      <executions>             <execution>                 <id>copy-statics</id>                 <phase>generate-resources</phase>                 <goals>                     <goal>unpack</goal>                 </goals>                 <configuration>                  <artifactItems>                <artifactItem>          <groupId>com.yihaodian.front</groupId>          <artifactId>front-global</artifactId>          <version>1.0-SNAPSHOT</version>          <classifier>statics</classifier>          <type>zip</type>                   <overWrite>true</overWrite>                   <outputDirectory>src/main/webapp</outputDirectory>                </artifactItem>              </artifactItems>                 </configuration>             </execution>          </executions>  </plugin>   配置完成后，需运行一次mvn generate-resources命令。