将 Maven 项目打成可执行 Jar 包（包括相关的依赖）

使用 maven 的 maven-assembly-plugin 插件可以很方便的将项目打包成一个可执行 Jar 文件，下面以一个简单的 Spring 项目为例，讲述如何进行配置和打包。

项目结构

1582711842253

这是一个最简单的 Spring 项目，Test 类是包含 main 方法的入口，各文件内容如下：

Test.java

package com.zhangzw;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import com.zhangzw.config.AppConfig;
import com.zhangzw.service.UserService;

public class Test {
    
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
        context.start();
        
        UserService userService = context.getBean(UserService.class);
        userService.query();
    }
}

AppConfig.java

package com.zhangzw.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan("com.zhangzw")
public class AppConfig {

}

UserService.java

package com.zhangzw.service;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Service;

@Service
public class UserService {
    
    private Log logger = LogFactory.getLog(this.getClass());
    
    public void query() {
        logger.info("hello");
    }
}

log4j.properties

log4j.rootLogger=info,Console

log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%d{HH:mm:ss SSS}] %5p %C:%L - %m%n

pom.xml 依赖

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.12.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
</dependencies>

插件 pom.xml 配置

插件配置如下：

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>3.2.0</version>
            <configuration>
                <archive>
                    <manifest>
                        <!-- 入口 main 方法所在类 -->
                        <mainClass>com.zhangzw.Test</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>