编写maven插件。

网上有很多关于maven插件编写的内容，这里我还是以我的方式，大部分代码形式来阐述。

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.vicky</groupId>
    <artifactId>tools-plugins-tests</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>maven-plugin</packaging>
    <name>tools-plugins-tests</name>
    <url>http://maven.apache.org</url>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-plugin-api</artifactId>
            <version>3.0.5</version>
        </dependency>
    </dependencies>
</project>

package cn.vicky.tests;

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;

/**
 * @goal test1
 * @phase compile
 * @requiresProject false 该命令可以在任何路径下执行，因为他不依赖maven项目
 */
public class Test1 extends AbstractMojo {

    /**
     * @parameter expression="${name}"
     * @required
     */
    String name;
    /**
     * @parameter expression="${age}"
     * @required
     */
    int age;
    /**
     * @parameter expression="${isOk}"
     * @required
     */
    boolean isOk;

    public void execute() throws MojoExecutionException, MojoFailureException {
        getLog().info(this.toString());
    }

    public String toString() {
        return "String is : \"" + name + "\"" + "int is : \"" + age + "\""
                + "boolean is : \"" + isOk + "\"";
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cn.vicky.tests;

import java.io.File;
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;

/**
 *
 * @goal test3
 * @phase compile
 * @requiresProject true 该命令只能在Maven项目下执行，因为他依赖maven项目
 */
public class Test3 extends AbstractMojo {

    private static final String[] DEFAULT_INCLUDES = new String[]{"java", "xml", "properties"};
    /**
     * 项目根目录
     *
     * @parameter expression="${project.basedir}"
     * @required
     * @readonly
     */
    private File basedir;
    /**
     * 项目资源目录
     *
     * @parameter expression="${project.build.sourceDirectory}"
     * @required
     * @readonly
     */
    private File sourceDirectory;
    /**
     * 项目测试资源目录
     *
     * @parameter expression="${project.build.testSourceDirectory}"
     * @required
     * @readonly
     */
    private File testSourceDirectory;
    /**
     * 其他目录,由于没有配置required 以及 readonly，故可以不用配置， 且在pom.xml
     * plugin->configuration会显示该属性的代码提示
     *
     * @parameter expression="${otherFile}"
     */
    private File otherFile;
    /**
     * 项目资源
     *
     * @parameter expression="${project.build.resources}"
     * @required
     * @readonly
     */
    private List<Resource> resources;
    /**
     * 项目测试资源
     *
     * @parameter expression="${project.build.testResources}"
     * @required
     * @readonly
     */
    private List<Resource> testResources;
    /**
     * 额外参数，由于没有配置expression，所以只能过通过pom.xml plugin->configuration配置获得
     *
     * @parameter
     */
    private String[] includes;
    /**
     * 额外参数，可以通过pom.xml plugin->configuration配置获得，也可以通过 -Dother=a,b,c
     * 这样获得,但如果同时在pom.xml中配置也通过-D配置， 那么将使用-D替换pom.xml的配置
     *
     * @parameter expression="${others}"
     */
    private String[] others;
    /**
     * 设置一个默认值
     *
     * @parameter default-value="99"
     */
    private int num;

    public void execute() throws MojoExecutionException, MojoFailureException {

        for (Object key : getPluginContext().keySet()) {
            System.out.println("key:" + key + "  value:" + getPluginContext().get(key));
        }

        if (includes == null) {
            includes = DEFAULT_INCLUDES;
        }

        getLog().info("\t basedir : " + basedir.toString());
        getLog().info("\t sourceDirectory : " + sourceDirectory.toString());
        getLog().info("\t testSourceDirectory : " + testSourceDirectory.toString());
        if (otherFile != null) {
            getLog().info("\t otherFile : " + otherFile.toString());
        }
        for (Resource rs : resources) {
            getLog().info("\t resource : " + rs.toString());
        }
        for (Resource rs : testResources) {
            getLog().info("\t testResource : " + rs.toString());
        }
        if (includes != null) {
            for (String str : includes) {
                getLog().info("\t include : " + str);
            }
        }
        if (others != null) {
            for (String str : others) {
                getLog().info("\t other : " + str);
            }
        }

        getLog().info("\t num : " + num);

    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cn.vicky.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
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;

/**
 *
 * @goal filecounts
 * @phase compile
 * @requiresProject true 该命令只能在Maven项目下执行，因为他依赖maven项目
 */
public class FileCounts extends AbstractMojo {

    private static final String[] DEFAULT_INCLUDES = new String[]{"java", "xml", "properties"};
    /**
     * 项目根目录
     *
     * @parameter expression="${project.basedir}"
     * @required
     * @readonly
     */
    private File basedir;
    /**
     * 项目资源目录
     *
     * @parameter expression="${project.build.sourceDirectory}"
     * @required
     * @readonly
     */
    private File sourceDirectory;
    /**
     * 项目测试资源目录
     *
     * @parameter expression="${project.build.testSourceDirectory}"
     * @required
     * @readonly
     */
    private File testSourceDirectory;
    /**
     * 项目资源
     *
     * @parameter expression="${project.build.resources}"
     * @required
     * @readonly
     */
    private List<Resource> resources;
    /**
     * 项目测试资源
     *
     * @parameter expression="${project.build.testResources}"
     * @required
     * @readonly
     */
    private List<Resource> testResources;
    /**
     * 额外参数，由于没有配置expression，所以只能过通过pom.xml plugin->configuration配置获得
     *
     * @parameter
     */
    private String[] includes;

    public void execute() throws MojoExecutionException, MojoFailureException {

        if (includes == null) {
            includes = DEFAULT_INCLUDES;
        }

        List<File> rfFiles = new ArrayList<File>();
        getRfFiles(rfFiles, basedir);
        for (File file : rfFiles) {
            try {
                System.out.println(getFilecounts(file));
            } catch (FileNotFoundException ex) {
                ex.printStackTrace();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }

    private void getRfFiles(List<File> files, File file) {
        if (!file.exists()) {
            return;
        }
        if (file.isDirectory()) {
            File[] listFiles = file.listFiles();
            for (File f : listFiles) {
                getRfFiles(files, f);
            }
        } else {
            for (String include : includes) {
                if (file.getName().endsWith("." + include)) {
                    files.add(file);
                    break;
                }
            }

        }
    }

    private FileCountsInfo getFilecounts(File file) throws FileNotFoundException, IOException {
        BufferedReader br = new BufferedReader(new FileReader(file));
        int count = 0;
        try {
            while (br.ready()) {
                br.readLine();
                count++;
            }
        } catch (Exception e) {
        } finally {
            br.close();
        }
        return new FileCountsInfo(file, count);
    }
}

class FileCountsInfo {

    private File file;
    private int count;

    public FileCountsInfo(File file, int count) {
        this.file = file;
        this.count = count;
    }

    public File getFile() {
        return file;
    }

    public void setFile(File file) {
        this.file = file;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    @Override
    public String toString() {
        return file.toString() + " count: " + count;
    }
}

mvn cn.vicky:tools-plugins-tests:test1 -Dname=vicky -Dage=27 -DisOk=true

[tools-plugins-tests:test1]
String is : "vicky"int is : "27"boolean is : "true"

mvn cn.vicky:tools-plugins-tests:test3 -Dothers=o1,o2,o3

[tools-plugins-tests:test3]
key:pluginDescriptor  value:Component Descriptor: role: 'org.apache.maven.plugin.Mojo', implementation: 'cn.vicky.tests.FileCounts', role hint: 'cn.vicky:tools-plugins-tests:1.0-SNAPSHOT:filecounts'
role: 'org.apache.maven.plugin.Mojo', implementation: 'cn.vicky.tests.Test2', role hint: 'cn.vicky:tools-plugins-tests:1.0-SNAPSHOT:test2'
role: 'org.apache.maven.plugin.Mojo', implementation: 'cn.vicky.tests.Test3', role hint: 'cn.vicky:tools-plugins-tests:1.0-SNAPSHOT:test3'
role: 'org.apache.maven.plugin.Mojo', implementation: 'cn.vicky.tests.Test1', role hint: 'cn.vicky:tools-plugins-tests:1.0-SNAPSHOT:test1'
---
key:project  value:MavenProject: cn.vicky:tools-plugins-tests-tests:1.0-SNAPSHOT @ E:\tools-plugins\tools-plugins-tests-tests\pom.xml
basedir : E:\tools-plugins\tools-plugins-tests-tests
sourceDirectory : E:\tools-plugins\tools-plugins-tests-tests\src\main\java
testSourceDirectory : E:\tools-plugins\tools-plugins-tests-tests\src\test\java
otherFile : E:\tools-plugins\tools-plugins-tests-tests\xxx
resource : Resource {targetPath: null, filtering: false, FileSet {directory: E:\tools-plugins\tools-plugins-tests-tests\src\main\resources, PatternSet [includes: {}, excludes: {}]}}
testResource : Resource {targetPath: null, filtering: false, FileSet {directory: E:\tools-plugins\tools-plugins-tests-tests\src\test\resources, PatternSet [includes: {}, excludes: {}]}}
include : java
include : xml
include : properties
include : sql
other : o1
other : o2
other : o3
num : 1000

mvn cn.vicky:tools-plugins-tests:filecounts

[tools-plugins-tests:filecounts]
E:\tools-plugins\tools-plugins-tests-tests\nbactions.xml count: 31
E:\tools-plugins\tools-plugins-tests-tests\pom.xml count: 49
E:\tools-plugins\tools-plugins-tests-tests\src\main\java\cn\vicky\tools\plugins\tests\tests\App.java count: 14
E:\tools-plugins\tools-plugins-tests-tests\src\test\java\cn\vicky\tools\plugins\tests\tests\AppTest.java count: 35