第4章 springboot热部署 4-1 SpringBoot 使用devtools进行热部署

/imooc-springboot-starter/src/main/resources/application.properties

#关闭缓存,  即时刷新
#spring.freemarker.cache=false
spring.thymeleaf.cache=true#热部署生效
spring.devtools.restart.enabled=true
#设置重启的目录,添加那个目录的文件需要restart
spring.devtools.restart.additional-paths=src/main/java
#  为mybatis设置, 生产环境可删除
#restart.include.mapper=/mapper-[\\w-\\.]+jar
#restart.include.pagehelper=/pagehelper-[\\w-\\.]+jar
#排除那个目录的文件不需要restart
spring.devtools.restart.exclude=static/**,public/**,WEB-INF/**
#classpath目录下的WEB-INF文件夹内容修改不重启
#spring.devtools.restart.exclude=WEB-INF/**

/imooc-springboot-starter/pom.xml

<?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.imooc</groupId><artifactId>imooc-springboot-starter</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>imooc-springboot-starter</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.6.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</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><!-- 热部署 --><!-- devtools可以实现页面热部署（即页面修改后会立即生效，这个可以直接在application.properties文件中配置spring.thymeleaf.cache=false来实现） --><!-- 实现类文件热部署（类文件修改后不会立即生效），实现对属性文件的热部署。 --><!-- 即devtools会监听classpath下的文件变动，并且会立即重启应用（发生在保存时机），注意：因为其采用的虚拟机机制，该项重启是很快的  --><!-- （1）base classloader （Base类加载器）：加载不改变的Class，例如：第三方提供的jar包。 --><!-- （2）restart classloader（Restart类加载器）：加载正在开发的Class。 --><!-- 为什么重启很快，因为重启的时候只是加载了在开发的Class，没有重新加载第三方的jar包。 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><optional>true</optional><!-- optional=true, 依赖不会传递, 该项目依赖devtools;之后依赖boot项目的项目如果想要使用devtools, 需要重新引入  --></dependency> </dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

/imooc-springboot-starter/src/main/java/com/imooc/controller/UserController.java

package com.imooc.controller;import java.util.Date;//import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
//import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import com.imooc.pojo.LeeJSONResult;
import com.imooc.pojo.User;//@Controller
@RestController // @RestControler = @Controller + @ResponseBody
@RequestMapping("/user")
public class UserController {//@RequestMapping("/hello")@RequestMapping("/getUser")//@ResponseBodypublic User hello() {//public User getUser() {    User u = new User();u.setName("imooc");u.setAge(18);u.setBirthday(new Date());u.setPassword("imooc");//u.setDesc(null);u.setDesc("hello imooc~~");return u;}@RequestMapping("/getUserJson")//@ResponseBodypublic LeeJSONResult hello1() {//public LeeJsonResult getUserJson() {    User u = new User();//u.setName("imooc");u.setName("imooc1");u.setAge(18);u.setBirthday(new Date());u.setPassword("imooc");//u.setDesc(null);//u.setDesc("hello imooc~~");u.setDesc("hello imooc1~~");return LeeJSONResult.ok(u);}
}

/imooc-springboot-starter/src/main/java/com/imooc/controller/UserController.java

package com.imooc.controller;import java.util.Date;//import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
//import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import com.imooc.pojo.LeeJSONResult;
import com.imooc.pojo.User;//@Controller
@RestController // @RestControler = @Controller + @ResponseBody
@RequestMapping("/user")
public class UserController {//@RequestMapping("/hello")@RequestMapping("/getUser")//@ResponseBodypublic User hello() {//public User getUser() {    User u = new User();//u.setName("imooc");u.setName("imooc1");u.setAge(18);u.setBirthday(new Date());//u.setPassword("imooc");u.setPassword("imooc1");//u.setDesc(null);//u.setDesc("hello imooc~~");u.setDesc("hello imooc1~~");return u;}@RequestMapping("/getUserJson")//@ResponseBodypublic LeeJSONResult hello1() {//public LeeJsonResult getUserJson() {    User u = new User();//u.setName("imooc");u.setName("imooc1");u.setAge(18);u.setBirthday(new Date());u.setPassword("imooc");//u.setDesc(null);//u.setDesc("hello imooc~~");u.setDesc("hello imooc1~~");return LeeJSONResult.ok(u);}
}