Maven2 plugin开发教程详解

2019-11-26 11:57:02

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首先，创建项目，创建一个文件夹：mkdir yakov

进入yakov目录，然后创建一个pom.xml：touch pom.xml，这个xml文件的结构会在另外的章节详细说一下。

使用vi编辑pom.xml，写入基本的项目信息，如下图：

单单是这些还是不够的，接下来需要，配置一些私服和集成。

注：上面的version改为3.0

有关的私服和集成服务在上一篇中写过：http://www.cnblogs.com/yakov/archive/2011/11/19/maven2_shi_jian.html

设置Maven从Nexus私服下载构件

可以设置某个项目从私服下载，设置项目的pom.xml如下：

<project>...  <repositories>    <repository>      <id>nexus</id>      <name>Nexus</name>      <url>http://202.117.15.193:8010/nexus/content/groups/public/</url>      <releases><enabled>true</enabled></releases>      <snapshots><enabled>true</enabled></snapshots>    </repository>  </repositories>  <pluginRepositories>    <pluginRepository>      <id>nexus</id>      <name>Nexus</name>      <url>http://202.117.15.193:8010/nexus/content/groups/public/</url>      <releases><enabled>true</enabled></releases>      <snapshots><enabled>true</enabled></snapshots>    </pluginRepository>  </pluginRepositories>...</project>

但是这需要为每个项目配置一下，有可能你仅仅需要为你开发的所有项目都用这同一个私服，那么很好，settings.xml提供了profile来设置：

<settings>  ...  <profiles>    <profile>      <id>nexus</id>      <repositories>        <repository>          <id>nexus</id>          <name>Nexus</name>          <url>http://202.117.15.193:8010/nexus/content/groups/public/</url>          <releases><enabled>true</enabled></releases>          <snapshots><enabled>true</enabled></snapshots>        </repository>      </repositories>      <pluginRepositories>        <pluginRepository>          <id>nexus</id>          <name>Nexus</name>          <url>http://202.117.15.193:8010/nexus/content/groups/public/</url>          <releases><enabled>true</enabled></releases>          <snapshots><enabled>true</enabled></snapshots>        </pluginRepository>      </pluginRepositories>    </profile>  </profiles>  <activeProfiles>    <activeProfile>nexus</activeProfile>  </activeProfiles>  ...</settings>

上面的配置是针对下载构件的，如果所有的下载都从私服上进行，就需要配置镜像了！如下所示：

<settings>  ...  <mirrors>    <mirror>      <id>nexus</id>      <mirrorOf>*</mirrorOf>      <url>http://202.117.15.193:8010/nexus/content/groups/public/</url>    </mirror>  </mirrors>  <profiles>    <profile>      <id>nexus</id>      <repositories>        <repository>          <id>central</id>          <url>http://central</url>          <releases><enabled>true</enabled></releases>          <snapshots><enabled>true</enabled></snapshots>        </repository>      </repositories>      <pluginRepositories>        <pluginRepository>          <id>central</id>          <url>http://central</url>          <releases><enabled>true</enabled></releases>          <snapshots><enabled>true</enabled></snapshots>        </pluginRepository>      </pluginRepositories>    </profile>  </profiles>  <activeProfiles>    <activeProfile>nexus</activeProfile>  </activeProfiles>  ...</settings>

以上几个任选一种就可以了，我这里使用了最后一种。

部署自己的构件至Nexus

直接在要部署的项目的pom.xml中写入如下代码:

还需要在settings.xml中设置用户名和密码，因为Nexus的仓库对于匿名用户是readonly的：

至此，有关私服已经设置好了！

在目录src/main/java下编写plugin

在yakov下创建src/main/java目录
写一个YakovMojo的类：

import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.util.ArrayList;import java.util.List;import org.apache.maven.model.Resource;import org.apache.maven.plugin.AbstractMojo;import org.apache.maven.plugin.MojoExecutionException;import org.apache.maven.plugin.MojoFailureException;/** *  * @author org.omylab.yakov * @goal yakov*/public class YakovMojo extends AbstractMojo{  private final String[] INCLUDES_DEFAULT={"java","xml","properties"};  /**   * @parameter expression="${project.basedir}"   * @required   * @readonly*/  private File basedir;  /**   * @parameter expression ="${project.build.sourceDirectory}"   * @required   * @readonly*/  private File sourceDirectory;  /**   * @parameter expression ="${project.biuld.testSourceDirectory}"   * @required   * @readonly*/  private File testSourceDirectory;  /**   * @parameter expression ="${project.build.resources}"   * @required   * @readonly*/  private List<Resource> resources;  /**   * @parameter expression "${project.build.testResources}"   * @required   * @readonly*/  private List<Resource> testResources;  /**   * The file types which will be included for counting   *   * @parameter*/  private String[] includes;  public void execute() throws MojoExecutionException, MojoFailureException{    if(includes==null||includes.length==0){      includes=INCLUDES_DEFAULT;    }    try{      countDir(sourceDirectory);      countDir(testSourceDirectory);      for(Resource resource:resources){        countDir(new File(resource.getDirectory()));      }      for(Resource resource:testResources){        countDir(new File(resource.getDirectory()));      }    }catch(IOException e){      throw new MojoExecutionException("Unable to count lines of code.",e);    }  }    private void countDir(File dir)throws IOException{    if(!dir.exists())return;    List<File> collected=new ArrayList<File>();    collectFiles(collected,dir);    int lines=0;    for(File sourceFile:collected){      lines+=countLine(sourceFile);    }    String path=dir.getAbsolutePath().substring(basedir.getAbsolutePath().length());    getLog().info(path+" : "+lines+" lines of code in "+collected.size()+" files");  }    private void collectFiles(List<File> collected,File file){    if(file.isFile()){      for(String include:includes){        if(file.getName().endsWith("."+include)){          collected.add(file);          break;        }      }    }else{      for(File sub:file.listFiles()){        collectFiles(collected,sub);      }    }  }  private int countLine(File file)throws IOException{    BufferedReader reader=new BufferedReader(new FileReader(file));    int line =0;    try{      while(reader.ready()){        reader.readLine();        line++;      }    }finally{      reader.close();    }    return line;  }}

然后运行mvn clean compile，运行结果如下：