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This article mainly explains "the method of hot deployment of Springboot". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "the method of hot deployment of Springboot".

Devtools introduction

SpringBoot provides the function of hot deployment, so what is hot deployment tiring? SpringBoot officially says that whenever the file on the classpath changes, the application is automatically restarted. This can be a useful feature when working in IDE because it provides a very fast feedback loop for code changes. By default, changes to any entries that point to the folder on the classpath are monitored. Note that some resources, such as static assets and view templates, do not need to restart the application.

Trigger restart

Because DevTools monitors classpath resources, the only way to trigger a restart is to update the classpath. The way in which the classpath is updated depends on the IDE you use. In Eclipse, saving the modified file causes the classpath to be updated and triggers a restart. In IntelliJ

In IDEA, the build project (Build-> Build Project) has the same effect.

At the same time, DevTools also provides the function of running remote applications, which is to modify the local code so that it can be updated to the remote application in real time, so that the local code and remote server code can be debugged jointly.

Use DevTools for hot deployment operations Eclipse uses SpringBoot DevTools

The first step is to introduce spring-boot-devtools dependency. The specific code is as follows:

Org.springframework.boot spring-boot-devtools true

And then we're done. We can use it, and we don't have to restart the project by modifying classes and pages.

IntellJ IDEA uses SpringBoot DevTools

The first step is to introduce spring-boot-devtools dependency. The specific code is as follows:

Org.springframework.boot spring-boot-devtools true

You may think it's done, but I can assure you that NO NO NO needs to be configured a little bit.

The second step starts the automatic compilation function. The specific operations are as follows:

File-> Settings-> Build,Execution,Deplyment-> Compiler, check Build project automatically. The specific operation is as follows:

In the third step, automatic compilation is still allowed when the program is running. The specific operations are as follows:

Use the shortcut key Shift+Ctrl+Alt+/, click the Registry option, and select compiler.automake.allow.when.app.running for specific operations as follows:

After completing the above operation, you can rest assured to develop the SpringBoot project on IntellJ IDEA, and you don't have to worry about restart.

Introduction to common configuration of DevTools

Normally, there is no need for configuration in the process of using DevTools. If you need custom restart directories and directories that do not need to be restarted, SpringBoot also provides us with specific configuration items in application.properties.

Common configurations are as follows:

Spring.devtools.restart.log-condition-evaluation-delta=false # disable log reporting

Spring.devtools.restart.exclude=static/,public/ # does not need to modify the file directory that triggered the restart

Under the default configuration of spring.devtools.restart.additional-exclude #, the new exclusion directory is also required.

Spring.devtools.restart.additional-paths=# adds the path that needs to be restarted after monitoring the files to be changed

Spring.devtools.restart.enabled=true # whether to disable restart

Thank you for reading, the above is the content of "Springboot hot deployment method", after the study of this article, I believe you have a deeper understanding of the Springboot hot deployment method, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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