Springboot quickly slimmed down and deployed jar quickly

Tian Qiao Ba Xia 2020-11-11 01:12:43
springboot quickly slimmed deployed jar


The main points of this film

  • Introduce how to do for jar Bag slimming , Easy to deploy .

The normal way to package deployment

The detailed deployment process has been described in the article before :SpringBoot Project deployment to Linux Server and publish .

however , There are some problems with this approach , Every time I upload jar It takes a long time to get the package to the server . Why? ? Maybe we just created a basic SpirngBoot project , Maybe we just wrote three or four lines of code , Last generated jar The size of the bag is ridiculous , A good 17M, The reason is that the generated executable jar Not only the compiled classes , It also includes the information that the program depends on jar package , And that's the majority of that jar package .

We look at the build through compression software jar Contents of the package :

slimming.jar # 17M
- BOOT-INF
- classes # Store compiled code
- lib # Run the required dependencies
- classpath.idx
- META-INF
- org

We can clearly see that , Lead to jar This is the culprit for the size of the bag lib, And often we rarely change these dependencies , What changes frequently is the logic in some code , therefore , The idea of slimming is : take lib from jar Take it out , Just upload once lib, The volume of the rest is negligible , It can be transmitted in seconds .

Downsizing deployment

Get lib Catalog

According to the original maven Configuration mode , stay target Generate under directory jar.

 <build>
<finalName>slimming</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
$ mvn clean package

Get BOOT-INF/lib Catalog .

Change the default packaging method

 <build>
<finalName>slimming</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!-- Specifies the startup class of the project -->
<mainClass>com.hyh.SpringBootSlimmingApplication</mainClass>
<!-- Specify the packing method as ZIP -->
<layout>ZIP</layout>
<includes>
<!-- If you have your own dependence jar, You can import -->
<include>
<groupId>nothing</groupId>
<artifactId>nothing</artifactId>
</include>
</includes>
</configuration>
<executions>
<execution>
<goals>
<!-- Eliminate other dependencies , Keep only the simplest structure -->
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

Pack again

$ mvn clean package

here ,/target In the catalog slimming.jar Has gone from 18000K become 121K.

Upload lib and jar

- lib
- slimming.jar
$ nohup java -Dloader.path=./lib -jar slimming.jar $
  • Dloader.path: Inform the project that it depends on jar Where is the bag .

Source download

The content of this article is a summary of excellent blogs and official documents , The address of the original text has been marked in the reference section of the text . Last , All the code samples in this article have been uploaded to Gitee:https://gitee.com/tqbx/springboot-samples-learn, There are other SpringBoot The integration of oh .

Reference reading

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本文为[Tian Qiao Ba Xia]所创,转载请带上原文链接,感谢

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