4.如何让SPRINGBOOT自动重启

必须重启

目前的Springboot，当发生了任何修改之后，必须关闭后再启动Application类才能够生效，显得略微麻烦。 Springboot提供了热部署的方式，当发现任何类发生了改变，马上通过JVM类加载的方式，加载最新的类到虚拟机中。 这样就不需要重新启动也能看到修改后的效果了

 

pom.xml

 

做法很简单，在pom.xml中新增加一个依赖和一个插件就行了。
依赖：

 

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-devtools</artifactId>

<optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->

</dependency>

 

插件：

 

<plugin>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</plugin>

 

 

 

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<?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>com.how2java</groupId>   <artifactId>springboot</artifactId>   <version>0.0.1-SNAPSHOT</version>   <name>springboot</name>   <description>springboot</description>   <packaging>war</packaging>         <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.5.9.RELEASE</version>     </parent>       <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-tomcat</artifactId>                       </dependency>         <dependency>               <groupId>junit</groupId>               <artifactId>junit</artifactId>               <version>3.8.1</version>               <scope>test</scope>         </dependency>         <!-- servlet依赖. -->         <dependency>               <groupId>javax.servlet</groupId>               <artifactId>javax.servlet-api</artifactId>                         </dependency>               <dependency>                      <groupId>javax.servlet</groupId>                      <artifactId>jstl</artifactId>               </dependency>         <!-- tomcat的支持.-->         <dependency>                <groupId>org.apache.tomcat.embed</groupId>                <artifactId>tomcat-embed-jasper</artifactId>                          </dependency>             <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-devtools</artifactId>             <optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->         </dependency>               </dependencies>       <properties>         <java.version>1.8</java.version>     </properties>       <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build>   </project>

重启测试

 

重新启动Application，然后随便修改一下HelloController, 就会如图所示观察到控制台的自动重启现象