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")
    //@ResponseBody
    public 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")
    //@ResponseBody
    public 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")
    //@ResponseBody
    public 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")
    //@ResponseBody
    public 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);
        
    }
}