java – 如何从多模块maven项目中构建可执行jar？

我是初学者,不懂很多东西.我可以构建简单的可执行jar,但是如何将multimodule maven项目构建成可执行的jar对我而言是魔术.所以我有三个项目.
家长：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>Test</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>Main</module>
        <module>Dep</module>
    </modules>
</project>

和两个孩子项目：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>Test</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>Main</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>Dep</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>
</project>

和：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>Test</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>Dep</artifactId>
</project>

主模块主要有main方法(lol)

public class Main {
    public static void main(String[] args) {
        Hello hello = new Hello();
        System.out.println(hello.sayHello());
    }
}

“类别”在“Dep”模块中定义.我应该添加到我的poms来构建可执行jar与Main类从主模块作为入口点？

解决方法

你需要改变你的pom为人造物主.
您需要添加maven-assembly-plugin

在配置中,您可以选择在清单中指定mainClass.这应该是Main类的完全限定名称.

<project xmlns="http://maven.apache.org/POM/4.0.0"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0     http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.example</groupId>
        <artifactId>Test</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <artifactId>Main</artifactId>

    <properties>
        <!-- plugins -->
        <maven.assembly.plugin.version>2.4</maven.assembly.plugin.version>
        <!-- dependencies -->
        <dep.version>1.0-SNAPSHOT</dep.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
            </plugin>
        </plugins>

        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-assembly-plugin</artifactId>
                    <version>2.4</version>
                    <configuration>
                        <descriptorRefs>
                            <descriptorRef>jar-with-dependencies</descriptorRef>
                        </descriptorRefs>
                        <archive>
                            <manifest>
                                <mainClass>Main</mainClass>
                            </manifest>
                        </archive>
                    </configuration>
                    <executions>
                        <execution>
                            <id>make-assembly</id>
                            <phase>package</phase>
                            <goals>
                                <goal>single</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

    <dependencies>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>Dep</artifactId>
            <version>${dep.version}</version>
        </dependency>
    </dependencies>
</project>

在父项目上启动构建之后,应该在模块Main的目标子文件夹中创建可执行jar. (一个名为Main-1.0-SNAPSHOT-jar-with-dependencies.jar的jar是我得到的)

原文地址：https://www.jb51.cc/java/125400.html