普通的maven项目，如何打成一个fat jar（包括了全部依赖jar包）？

1、前言

用过spring boot的同学肯定知道，现在web项目可以直接打成jar包运行，相当方便。

那么普通项目如何配置（非spring boot），才能打成一个类似的jar包呢？

2、解决方案：

在pom中的build中进行如下配置即可：

        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <!--这里指定要运行的main类-->
                            <mainClass>netty.client.TcpClient809</mainClass>
                        </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id> <!-- 此处指定继承合并 -->
                        <phase>package</phase> <!-- 绑定到打包阶段 -->
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>

3、普通java工程，如何获取所有依赖的jar包

If you need to download the jars instead of using a build system, create a Maven pom file like this with the desired version:

<?xml version="1.0"?>
<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>com.netflix.hystrix.download</groupId>
    <artifactId>hystrix-download</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>Simple POM to download hystrix-core and dependencies</name>
    <url>http://github.com/Netflix/Hystrix</url>
    <dependencies>
        <dependency>
            <groupId>com.netflix.hystrix</groupId>
            <artifactId>hystrix-core</artifactId>
            <version>x.y.z</version>
            <scope/>
        </dependency>
    </dependencies>
</project>

Then execute:

mvn -f download-hystrix-pom.xml dependency:copy-dependencies

It will download hystrix-core-*.jar and its dependencies into ./target/dependency/.

You need Java 6 or later.