关于java:springboot动态修改配置文件

因为工夫关系，仅记录要点：
1.引入 spring-boot-starter-actuator及spring-cloud-starter-config
2.对须要刷新的属性应用@Value注解，同时将类应用@RefreshScope注解进行标记

    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.2.8.RELEASE</version>        <relativePath/> <!-- lookup parent from repository -->    </parent>            <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>                <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-config</artifactId>            <version>2.1.5.RELEASE</version>        </dependency>                <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-actuator</artifactId>        </dependency>    </dependencies>

import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class Main {    public static void main(String[] args) {        SpringApplication.run(Main.class);    }

import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Value;import org.springframework.cloud.context.config.annotation.RefreshScope;import org.springframework.cloud.context.refresh.ContextRefresher;import org.springframework.core.env.ConfigurableEnvironment;import org.springframework.core.env.MapPropertySource;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import java.util.HashMap;@RestController@RefreshScopepublic class TestController {    @Autowired    private ContextRefresher contextRefresher;    @Autowired    private ConfigurableEnvironment environment;    @Value("${user.test1}")    private String test1;    @GetMapping("test1")    public String getInxo1() {        return this.test1;    }    @PostMapping("refresh")    public String default02(@RequestParam String name){        HashMap<String,Object> map = new HashMap<>();        map.put("user.test1",name);        MapPropertySource propertySource = new MapPropertySource("dynamic",map);        environment.getPropertySources().addFirst(propertySource);        new Thread(() -> contextRefresher.refresh()).start();        return "success";    }    }

3.application.properties配置。（留神2.0.3版本后裸露/refresh接入点的形式与旧版本不同，须要手动设置裸露点。）

server.port=8888management.endpoints.web.exposure.include=refreshuser.test1="hello world"

4.测试
4.1 启动我的项目，拜访 http://localhost:8888/test1
此时浏览器应显示 hello world
4.2 通过post申请，传参批改test1的内容 http://localhost:8888/refresh
4.3 http://localhost:8888/test1