让SpringBoot工程支持热部署

下载地址：https://files.cnblogs.com/files/xiandedanteng/SpringBootWeb-1_20190928.rar

修改Java文件后，每次要重启才好用，修改一下pom.xml,增加一个dependency，可以让Tomcat容器重新加载修改java类的class，这样能做到热部署。

这个denpendency就是spring-boot-devtools，具体写法如下：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.1.8.RELEASE</version>        <relativePath/> <!-- lookup parent from repository -->    </parent>    <groupId>com.hy</groupId>    <artifactId>SpringBootWeb-1</artifactId>    <version>0.0.1-SNAPSHOT</version>    <name>SpringBootWeb-1</name>    <description>Demo project for Spring Boot</description>    <properties>        <java.version>1.8</java.version>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-thymeleaf</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-devtools</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build></project>

增加这个依赖后，在控制器类里再增加一个跳转，

    @RequestMapping("/hot")    public String hot() {        return "new.html";    }

再把要跳转的网页准备好：

<!DOCTYPE html><html lang="utf-8"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><head>     <title>标题</title>    </head>     <body>            <h2>热部署</h2>     </body></html><script type="text/javascript"><!--    // 脚本//--></script>

准备完毕不用重启，直接在浏览器的地址栏中输入http://localhost:8080/hot

以下页面就会出现：