Maven2 plugin开发教程详解

时间:2021-08-02 16:43:12

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:

Maven2 plugin开发教程详解

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:

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<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:

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<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:

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<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:

Maven2 plugin开发教程详解

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:

Maven2 plugin开发教程详解

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:

 

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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:

Maven2 plugin开发教程详解

Maven2 plugin开发教程详解

编译完成,这里可移执行安装了,事实上,还应该有对应的测试代码,以后再讲。

运行mvn clean install完后就安装成功了。

最后运行mvn clean deploy 完成发布,查看nexus如下:

Maven2 plugin开发教程详解

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。