将 Gradle 项目转换成 Maven 需要的POM

引子

Gradle是一个很好用的编译工具。稍微有点不太方便的地方在于，有的开发环境只提供的Maven。所以有时候，我们需要利用 Gradle 生成 Maven 需要 POM.xml 文件。下面的方法可以把gradle转成maven项目，前提gradle项目目录结构保持跟maven一样的约定，即/src/main/java这一套。

生成 pom.xml

方式一：

1、打开 build.gradle 文件，在build.gradle中增加以下内容(group,version可自行修改，artifactId默认为目录名称)

apply plugin: 'java'
apply plugin: 'maven'

group = 'com.angei'
version = '1.0.0'
sourceCompatibility = 1.8

plugins的格式可以如下：

plugins {
    id 'java'
    id 'maven'
}

group = 'com.angei'
version = '1.0.0'
sourceCompatibility = 1.8

2、在终端下执行

gradle install

成功后，会在 build目录下的 poms 文件夹下生成 pom-default.xml，将其改名为 pom.xml 拷贝到项目的根目录下即可。

 

生成的pom-default.xml如下：

<?xml version="1.0" encoding="UTF-8"?>
<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>com.angei</groupId>
  <artifactId>gradle-first</artifactId>
  <version>1.0.0</version>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

方式二：

1、在build.gradle的文件中添加着色部分的内容：

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.3.3.RELEASE")
    }
}
 
apply plugin: 'java'
apply plugin: 'jacoco'
apply plugin: 'spring-boot'
apply plugin: 'maven'
 
sourceCompatibility = 1.8
compileJava.options.encoding = 'UTF-8'
 
 
group = 'com.101tec'
// Options for naming the JAR file
archivesBaseName = 'trackr-backend'
version = '1.0'
if(project.hasProperty('teamcity')) {
    version += '-build-' + project.teamcity['build.number']
} else {
    version += '-localbuild'
}
 
 
sourceCompatibility = 1.8
 
repositories {
    mavenCentral()
}
 
springBoot {
    executable = true
}
 
dependencies {
    compile "org.springframework.boot:spring-boot-starter-data-rest"
    compile "org.springframework.boot:spring-boot-starter-data-jpa"
    compile "org.springframework.boot:spring-boot-starter-mail"
    compile "org.springframework.boot:spring-boot-starter-integration"
    compile "org.springframework.boot:spring-boot-starter-security"
 
    // not included in boot
    compile "org.springframework.integration:spring-integration-mail:4.2.5.RELEASE"
    compile "org.springframework.security.oauth:spring-security-oauth2:2.0.11.RELEASE"
 
    compile "com.h2database:h2"
    compile "postgresql:postgresql:9.1-901.jdbc4"
    compile "org.flywaydb:flyway-core"
 
    compile("org.xhtmlrenderer:flying-saucer-pdf-itext5:9.0.6")
    compile("org.thymeleaf:thymeleaf:2.1.3.RELEASE")
 
    compile "org.projectlombok:lombok:1.12.4"
 
    compile "org.glassfish:javax.json:1.0"
    
 
    testCompile "org.springframework.boot:spring-boot-starter-test"
    testCompile("org.echocat.jomon:testing:1.4.3") {
        exclude group: "org.mockito"
    }
    testCompile "org.mockito:mockito-core:1.9.5"
    testCompile "com.jayway.jsonpath:json-path"
    testCompile "org.apache.httpcomponents:httpclient"
}
 
 
task wrapper(type: Wrapper) {
    gradleVersion = '2.2'
}
 
task createPom << {
 pom {
 project {
            groupId 'com.angei'
            artifactId 'gradle-first'
            version '1.0.0'
}
    }.writeTo("$buildDir/pom.xml")
}

其中这个createPom的task改成任何你自己喜欢的名字，如createPom、mavenPom、testPom等，然后只需要执行。

2、在终端执行：

gradle createPom

执行成功如图

 

 生成的Pom.xml内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<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>com.angei</groupId>
  <artifactId>gradle-first</artifactId>
  <version>1.0.0</version>
  <dependencies>
    <dependency>
      <groupId>com.feidee.laoyeye</groupId>
      <artifactId>feidee-laoyeye-service-dto</artifactId>
      <version>1.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.feidee.finance</groupId>
      <artifactId>finance-lib-javaweb</artifactId>
      <version>1.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-cache</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-jpa</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-aop</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-validation</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-security</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-freemarker</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka-clients</artifactId>
      <version>1.1.0</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.kafka</groupId>
      <artifactId>spring-kafka</artifactId>
      <version>1.3.7.RELEASE</version>
      <scope>compile</scope>
      <exclusions>
        <exclusion>
          <artifactId>kafka-clients</artifactId>
          <groupId>org.apache.kafka</groupId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.codehaus.groovy</groupId>
      <artifactId>groovy-all</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.testng</groupId>
      <artifactId>testng</artifactId>
      <version>6.13.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>