<version >3.2.4 </version > <descriptorRef >jar-with-dependencies </descriptorRef > </descriptorRefs > 分类专栏： java 文章标签： java maven assembly. package your microservice and all of its dependencies into a single JAR file. <execution > You can read more about Maven commands in my Maven Commands tutorial. <goals > * </exclude > There are different way to generate the Fat JHar file using maven. It supports, if some of the packages are not using in the application, we don't need in the final fat jar, we can exclude those package in the exclude section, which will improve the class loading performance. In the relocation configuration, we can move the package to another package, by providing the shadedPattern. <shadedPattern >org.shaded.sample.plexus.util </shadedPattern > <execution > 在这篇博客里面我们将详细地讲解如何利用maven来创造一个fat jar。可能大家对于fat jar的概念还不是很熟悉，没关系，在开始进一步的讲解之前我会跟你说明fat jar是什么的。另外本文的环境是 123Maven 3.3.9JDK 1.8Joda-Time 2.5 大家根据相应的情况自己创建一个Maven项目。 <version > Your Version Here </version > These Fat Jars are mostly useful to build executable jar file, for suppose, if we are developing a microservice, if we don't create fat jar file, we need to all its dependencies in one folder, add this folder to the classpath, and start the microservice, for each time we need to do these steps in manually, but if we generate the fat jar as it includes all its dependencies, not needed to add to the classpath, we can directly run the command to start the microservices. Today I needed to add some Java classes to the project but now my Maven build is failing. <execution > <archive > </execution > earlier, Maven will output a Fat JAR in the target directory, into which Maven outputs all of its JAR file that contains all the compiled Java classes from your project, and all compiled Java classes from command to startup the microservice. <groupId >org.apache.maven.plugins </groupId > </goals > XML element included in the top of the build XML element in the example shown earlier in The Maven command to make Maven build the Fat JAR for your project is: When you execute Maven package phase with the maven-assembly-plugin configuration shown </relocations > Create a project using maven-archetype-quickstart with following parameters. As in this example we are using to … I have a Scala project that I build into a Fat JAR. This plugin also supports, if some of the packages are not using in the application, we don’t need in the final fat jar, we can exclude those package in the exclude section, which will improve the class loading performance. </goals > You can use the onejar-maven-plugin for packaging. For spring boot application use just following plugin. <phase >package </phase > <configuration > Hence the name maven-assembly-plugin. </execution > </execution > <id >make-assembly </id > To get Maven to build a Fat JAR from your project you must include a Fat JAR build configuration in your <goals > </configuration > </plugins > He loves Open source technologies and writing on JavaCodeStuffs has become his passion. <executions > </executions > </executions > </manifest > <executions > </configuration > The maven-assembly-plugin should always be executed add each JAR file your application depends on to the Docker container, you only have to add the Fat JAR of our <exclude >org.sample.plexus.util.xml.pull. Spring Boot Maven Plugin. Again, this is much shorter, easier, and it makes your Dockerfile independent of what external You need to add this plugin in your pom.xml as given below. <goal >shade </goal > This article will concentrate on creating a “fat jar” out of a Spring Boot application – basically to create a single artifact that is easy to deploy and run.. </relocation > Create a Java project from the Maven quick start template. and one extra pom.xml file named with dependency-reduced-pom.xml. <!-- put your configurations here -- > <version >3.2.0 </version > Maven Shade Plugin works by modifying the maven package task. <configuration > Instead of having to add each JAR file your application depends on to the Docker container, you only have to add the Fat JAR of our application. <mainClass >${start-class} </mainClass > <executions > this tutorial. You can </plugin > Maven can build a Fat JAR from your Java project. <relocations > Maven provides other plugins using which we can generate the jar with all its dependencies which is usually called Maven FatJar, which is used as an executable Jar file. <version >1.4.4 </version > FatJar is a single JAR file that contains all the compiled Java classes from your project, and all compiled Java classes from all JAR files your project depends on. But … <goals > </executions > Tools used : Maven 3.1.1; JDK 1.7; Joda-time 2.5; 1. <goals > <executions > <descriptorRefs > Fat JARs are also handy if you need to package your application inside a Docker container. The value jar-with-dependencies tells Maven to build a JAR file with dependencies which In this Maven Fat JAR Tutorial I will show you how to create a Fat JAR with Maven. Maven plugin should be executed during. </executions > <excludes > <groupId >org.springframework.boot </groupId > Example Create a simple project. JavaCodeStuffs was founded by Bala K to share his experience and learnings with the Java and related Technologies. The Fat JAR will be named like this: The part my-project-name of the above Fat JAR file name comes from the finalName </plugin >, <plugin > project's POM file. <artifactId >onejar-maven-plugin </artifactId > <goal >shade </goal > <phase >package </phase > com.logicbig.example maven-assembly-plugin-example 1.0-SNAPSHOT Import the project into your IDE. all JAR files your project depends on (see Maven Dependencies). FatJar 又称作 uber-Jar，是包含所有依赖的 Jar 包。Jar 包中嵌入了除 java 虚拟机以外的所有依赖。我们知道 Java 的依赖分为两种， 零散的 .class 文件和把多个 .class 文件以 zip 格式打包而成 jar 文件。FatJar 是一个 all-in-one Jar 包。FatJar 技术可以让那些用于最终发布的 Jar 便于部署和运行。 Maven Assembly Plugin Documentation . This makes execution much easier, because <execution > Clean-up 2) Remove the spring-boot-maven-plugin if you are using Spring Boot. you don't have to list all the JAR files your microservice depends on, on the classpath. Step 2 – Run the maven build. <plugin > <goals > <mainClass >org.sample.Application </mainClass > dependencies (JAR files) your application uses. maven-assembly-plugin in your POM file's plugin section. <manifest > <artifactId >maven-shade-plugin </artifactId > Building a fat jar using Maven . The Maven command to make Maven build the Fat JAR for your project is: After configuring the shade plugin in your build the command mvn package will create one single jar with all dependencies merged into it. Fat JARs are handy when you need to build an executable JAR file, e.g. Maven assembly plugin is not good in producing fat/uber jar, it may cause name conflict issue, it is better to use other Maven plugins like : Maven shade plugin solve this by using technique like class relocating. <groupId >org.apache.maven.plugins </groupId > In this article, we have seen  How to Build a fat jar using Maven. </configuration > JavaCodeStuffs is one of the website for Java,Linux,Amazon Web Services, DevOps, and related technical articles. MavenShadeExample-uber.jar: This is fat/uber jar … Maven Shade Plugin Structure Run Maven Package Goal > mvn package. </excludes > Jib allows configuring the JVM flags and program arguments in the pom.xml. Jakob Jenkov <pattern >org.sample.plexus.util </pattern > When you run the package goal in project’s root directory, you will get two generated jar files i.e. compiled classes, generated JavaDocs etc.). Instead of having to </goals > Such a jar is know as a fat jar (also called uber jar) since it is substantially larger than the original. <relocation > A Fat JAR is a single You configure Maven to build a Fat JAR from your project by including the brief introduction. Here is a full Maven POM file with a Fat JAR configuration, just to show you how such a POM file can look. 最后发布:2017-01-15 21:53:12 首次发布:2017-01-15 21:53:12. FatJar is a single JAR file that contains all the compiled Java classes from your project, and all compiled Java classes from all JAR files your project depends on. a microservice executable. maven-assembly-plugin 打包可执行jar(fat jar)和配置文件与jar同时打包部署 . application. </executions > <execution > snippet from a POM file showing an example of a maven-assembly-plugin configuration: The configuration XML element inside the maven-assembly-plugin configuration contains <plugin > Now when you run the maven build using simple command mvn clean install, it will generate the fat jar for your project consisting all compiled application code as well as all its dependencies – packaged inside one big jar file. <groupId >com.jolira </groupId > Add dependency of third party jar. <goal >repackage </goal > The executions XML element tells Maven which Maven build phase and goal this In the previous article, we introduced the fat jar / war package of spring boot. </goals > <configuration > <artifactId >spring-boot-maven-plugin </artifactId > Maven provides other plugins using which we can generate the jar with all its dependencies which is usually called Maven FatJar, which is used as an executable Jar file. Viewed: 99,776 | +133 pv/w In this tutorial, we will show you how to use Maven build tool, One-JAR plugin to create a single Jar together with its dependency Jars into a single executable Jar file, so called fat Jar. The resultant jar is also called 'fat jar'. There is no need to create a fat jar anymore. Fat JARs are also useful if you are packaging your application inside a Docker container. maven fat-jar one-jar In diesem Lernprogramm zeigen wir Ihnen, wie Sie das One-JAR-Plugin mit dem Maven Build-Tool verwenden, um eine einzelne Jar zusammen mit ihren Abhängigkeits-Jars in einer einzigen ausführbaren Jar-Datei zu erstellen, der sogenannten Fat Jar. </plugin >, my-project-name-jar-with-dependencies.jar, <build > Maven can build a Fat JAR from your Java project. </build >, <plugin > Here is an example </configuration > Maven refers to an output product that it builds <groupId >org.apache.maven.plugins </groupId > <artifactId >maven-assembly-plugin </artifactId > </execution > Maven - 太いJarファイルを作成する - 1つのJARの例 fatのJarファイルを作成する - Maven Assembly Plugin Ant - ファットjarファイルを作成する Mavenプラグインの目標とパラメータを表示する方法 Mavenでマニフェストファイルを作成する方法 MavenとJUnitの例 as an assembly. Our tutorials are regularly updated, error-free, and complete. Create a simple Java project. Maven provides other plugins using which we can generate the jar with all its dependencies which is usually called Maven FatJar, which is used as an executable Jar file. </plugin >. <phase >package </phase > All jar / war packages can be run using java jar command, and Maven also provides MVN spring boot: run command to run applications. toocarrie 2017-01-15 21:53:12 9567 收藏. Basically, it assembles your project and its dependencies in as one jar, including not just your project jar file, but also all external dependencies as a "jar of jars", e.g. <artifactId >maven-shade-plugin </artifactId > For suppose, if a jar file contains 5 packages, but we are using only one package, then instead of excluding 9 packages, include 1 package. <goal >single </goal > <configuration > mvn clean install Demo </plugin >, <plugin > Let’s see what’s the difference between the two. <executions > </execution > In this tutorial, we will show you how to use Maven build tool, One-JAR plugin to create a single Jar together with its dependency Jars into a single executable Jar file, so called fat Jar. FatJar is a single JAR file that contains all the compiled Java classes from your project, and all compiled Java classes from all JAR files your project depends on. during the package phase. is another term for a Fat JAR. Last update: 2019-09-01. Maven one-jar plugin, add the dependency jar file directly into project jar, and loads it with custom class loader. <fork >true </fork > That simplifies the </goals > My project structure looks (roughly) like this: . <goal >one-jar </goal > Luckily Maven provides a plugin named Apache Maven Shade Plugin for creating a distributable jar with all the dependencies. Run a Deployment-Specific Configuration. </archive > Read More: Create fat jar using maven shade plugin. the descriptorRef which tells Maven what type of assembly this configuration should build. <plugins > A Fat JAR is a single JAR file that contains all the compiled Java classes from your project, and all compiled Java classes from all JAR files your project depends on (see Maven Dependencies ). You can read more about the Maven Assembly Plugin in the official other build products (e.g. Comparison of running applications with Maven and fat jar / War. An alternative is to use the maven shade plugin to build an uber-jar.

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