A simple method for creating JAR packages for MAVEN projects in IDEA, ideamaven

A simple method for creating JAR packages for MAVEN projects in IDEA, ideamaven

Idea has its own method for creating Jar packages for general non-Web projects. You can find a lot on the Internet.

However, it is very easy to create a Jar package for a Maven project, because maven itself has a command to create a Jar package.

The simplest method

First, add the packaging plug-in to the pom. xml file of the maven project. There are many methods. The simplest method is to use only the maven-compiler-plugin and maven-jar-plugin plug-ins, and specify the program entry <mainClass>. The related code is as follows:

The pom. xml file is:

<?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>cn.mymaven</groupId>  <artifactId>test</artifactId>  <version>1.0-SNAPSHOT</version>  <build>    <plugins>      <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-compiler-plugin</artifactId>        <configuration>          <source>1.8</source>          <target>1.8</target>        </configuration>      </plugin>      <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-jar-plugin</artifactId>        <configuration>          <archive>            <manifest>              <addClasspath>true</addClasspath>              <useUniqueVersions>false</useUniqueVersions>              <classpathPrefix>lib/</classpathPrefix>              <mainClass>cn.mymaven.test.TestMain</mainClass>            </manifest>          </archive>        </configuration>      </plugin>    </plugins>  </build>  </project> 

The entry class TestMain. java is:

package cn.mymaven.test;public class TestMain {  public static void main(String[] args){    System.out.println("Hello World");  }} 

Then start packaging. In Idea, all Maven project commands are made into a visual operation interface. You only need to perform the following operations:

Under the Maven Project directory, click package

　

In this case, the Jar package of this project will be generated under the target directory.

Run the java-jar command to run the Jar package and output "Hello World"

Notes

It should be noted that if a maven project contains multiple sub-directories, and the pom. xml in each sub-directory corresponds to a project, it takes effect only in this sub-directory. For example, if you want to scan the configuration file in a sub-directory pom. xml to scan the configuration file in another sub-directory, that is not possible. When creating a jar package, only the current pom. xml file is run.

Of course, there are other packaging methods, such as using the spring-boot-maven-plugin plug-in to introduce the dependency package when creating a Jar package.

Its pom. xml file is configured:

<build>  <plugins>    <plugin>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-maven-plugin</artifactId>    </plugin>    <plugin>      <groupId>org.apache.maven.plugins</groupId>      <artifactId>maven-compiler-plugin</artifactId>      <configuration>        <source>1.8</source>        <target>1.8</target>      </configuration>    </plugin>    <plugin>      <groupId>org.apache.maven.plugins</groupId>      <artifactId>maven-jar-plugin</artifactId>      <configuration>        <archive>          <manifest>            <addClasspath>true</addClasspath>            <useUniqueVersions>false</useUniqueVersions>            <classpathPrefix>lib/</classpathPrefix>            <mainClass>cn.mymaven.test.TestMain</mainClass>          </manifest>          <manifestEntries>            <version>${project.version}</version>          </manifestEntries>        </archive>      </configuration>    </plugin>  </plugins></build>

The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.