Apache Maven 自定义plugin插件的开发和使用

1. 目标

更好的理解插件的目标和生命周期环节之间的关系

2. 插件开发

1. 创建一个project，名称为maven-hello-plugin

2. 修改pom.xml，添加packaging和dependency，最终内容如下：

    4.0.0

    com.hh.maven
    maven-hello-plugin
    1.0
    
    maven-plugin


    
        11
        11
    

    
        
        
            org.apache.maven
            maven-plugin-api
            3.8.6
        
        
    

3. 创建Mojo类

Mojo(Maven Old Java Object)类是一个Maven插件的核心类。每一个Mojo类都需要实现org.apache.maven.plugin.Mojo接口，org.apache.maven.plugin.AbstractMojo抽象类继承Mojo接口

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Mojo;

// 方式一：使用的是maven-plugin-api，通过注释的方式将goal目标，绑定到MOJO类
/**
 * @goal sayHelloApi
 */

// 方式二：使用的是maven-plugin-annotations，通过注解的方式将goal目标，绑定到MOJO类
@Mojo(name = "sayHelloAnnotations")
public class MavenHelloPlugin extends AbstractMojo {

    // 覆盖execute()方法
    @Override
    public void execute() throws MojoExecutionException, MojoFailureException {
        getLog().info("=======this is my first maven plugin=======");
    }
}

4. 执行mvn clean install将插件安装到本地的maven仓库

5. 将插件注册到settings.xml中 将插件的pom中的groupId添加到settings.xml的pluginGroups.pluginGroup。如下所示

  
    com.hh
  

3. 插件的使用 3.1 插件的匹配规则

Maven根据插件的artifactId来进行插件的匹配，有如下两种匹配规则：

• 前置匹配：

  匹配规则：${prefix}-maven-plugin artifactId：hello-maven-plugin 匹配到插件：hello

• 中间匹配

  匹配规则：maven-${prefix}-plugin artifactId：maven-hello-plugin 匹配到插件：hello

3.2 命令行直接使用

C:\Users\dell\Desktop\maven-hello-plugin>mvn hello:sayHelloApi
[INFO] Scanning for projects...
[INFO] 
[INFO] ---------------------< com.hh:maven-hello-plugin >----------------------
[INFO] Building maven-hello-plugin 1.0
[INFO] ----------------------------[ maven-plugin ]----------------------------
[INFO]
[INFO] --- maven-hello-plugin:1.0:sayHelloApi (default-cli) @ maven-hello-plugin ---
[INFO] =======this is my first maven plugin=======
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.553 s
[INFO] Finished at: 2022-06-30T18:25:25+08:00
[INFO] ------------------------------------------------------------------------

C:\Users\dell\Desktop\maven-hello-plugin>

3.3 配置到build标签

    
        
            
                com.hh
                maven-hello-plugin
                1.0
                
                    
                        sayHelloApiId
                        clean
                        
                            sayHelloApi
                        
                    
                    
                        sayHelloAnnotationsId
                        clean
                        
                            sayHelloAnnotations
                        
                    
                
            
        
    

重新导入依赖，效果如下：

双击其中任何一个都会执行，打印：=======this is my first maven plugin=======

命令行执行mvn clean，也会自动执行maven-hello-plugin插件的goal目标方法。效果如下：

C:\Users\dell\Desktop\maven-hello-plugin>mvn clean
[INFO] Scanning for projects...
[INFO] 
[INFO] ---------------------< com.hh:maven-hello-plugin >----------------------
[INFO] Building maven-hello-plugin 1.0
[INFO] ----------------------------[ maven-plugin ]----------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ maven-hello-plugin ---
[INFO] Deleting C:\Users\dell\Desktop\maven-hello-plugin\target
[INFO] 
[INFO] --- maven-hello-plugin:1.0:sayHelloApi (sayHelloApiId) @ maven-hello-plugin ---
[INFO] =======this is my first maven plugin=======
[INFO]
[INFO] --- maven-hello-plugin:1.0:sayHelloAnnotations (sayHelloAnnotationsId) @ maven-hello-plugin ---
[INFO] =======this is my first maven plugin=======
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.419 s
[INFO] Finished at: 2022-06-30T18:35:18+08:00
[INFO] ------------------------------------------------------------------------

C:\Users\dell\Desktop\maven-hello-plugin>