环境

SpringBoot 2.2.2.RELEASE

1. SpringBoot 参数配置

1.1 环境准备

1. 依赖文件导入

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

2. 参数文件

   myconfig:
     name: configByValue
     id: 100
     desc: myDescByProperty
   

1.2 使用@Value注解

@RestController
public class MyConfig1 {

    @Value("${myconfig.name}")
    private String name;

    @RequestMapping("/config/value")
    public String myConfig() {
        return "value annotation:" + name;
    }
}

1.3使用@ConfigurationProperties注解

使用@ConfigurationProperties时必须实现get和set方法

@RestController
@ConfigurationProperties(prefix = "myconfig")
@Data
public class MyConfig2 {

    private String name;
    private int id;
    private String desc;

    @RequestMapping("/config/property")
    public String myConfig() {
        return "name:"  + name + ",id:" + id + ",desc:" + desc;
    }
}

1.4 多环境配置文件

1. 环境准备config/application-test.yml

   server:
     port: 9999
   

2. 准备config/application-prod.yml

   server:
     port: 8888
   

3. 在application.yml中配置切换标签,根据配置test或者prod，启动的端口不同

   spring:
     profiles:
       active: prod
   

参考

• Spring Boot Profile使用详解及配置源码解析

• Spring Boot启动命令参数详解及源码分析

• Tomcat在SpringBoot中是如何启动的

代码示例-github