IDEA on the configuration of SpringBoot project realization Devtools hot deployment

spring provides a developer named for the spring-boot-devtoolsmodule to the Spring Boot application supports hot deployment and improve development efficiency of the developer, without having to manually restart the Spring Boot application.

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devtools The principle: the use of two ClassLoader, ClassLoader one of the major load does not change the class (third-party jar package), another ClassLoader loaded with a change of class, it is also called restart ClassLoader , due to the need to load a few classes, you can realization restart within a faster rate

Add devtools depend in pom file

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <!-- optional=true,依赖不会往下传递，
    如果有项目依赖本项目，并且想要使用devtools，需要重新引入 -->
    <optional>true</optional>
    <scope>runtime</scope>
</dependency>

Explanation

• Page hot deployment

  Configuring spring.thymeleaf.cache in application.properties file = false (after the page changes will take effect immediately)

• Some resources when changes need not necessarily trigger a restart

  Thymeleaf template can be edited in-place. Change the default resource path includes: / META-INF / maven, / META-INF / resources, / resources, / static, / public or / templates does not trigger a restart, but will trigger real-time reload. If reverse exclude these paths may be used as follows: static spring.devtools.restart.exclude = / , public /