spring boot @ConfigurationProperties注入list

背景

业务需求是要读取yaml文件配置，注入到List<Map<String, String>>中，查了一下官方文档

To bind to properties like that by using Spring Boot’s Binder utilities (which is what @ConfigurationProperties does), you need to have a property in the target bean of type java.util.List (or Set) and you either need to provide a setter or initialize it with a mutable value. For example, the following example binds to the properties shown previously:

机翻如下

要使用Spring Boot的Binder实用程序绑定属性（@ConfigurationProperties确实如此），您需要在类型为java.util.List（或Set）的目标bean中具有一个属性，并且需要提供setter或使用可变值对其进行初始化。例如，以下示例绑定到前面显示的属性：

官方代码

my:
servers:
	- dev.example.com
	- another.example.com

@ConfigurationProperties(prefix="my")
public class Config {

	private List<String> servers = new ArrayList<String>();

	public List<String> getServers() {
		return this.servers;
	}
}

分析

打断点测试了一下,发现list注入步骤大致如下:

1. 调用get方法获取list
2. list.add

核心步骤

1. 类名上加@ConfigurationProperties
2. list得初始化
3. list有get方法

拓展 注入list<Map<String,String>>

yaml

robot:
- name: robot1
  token: token1
- name: robot2
  token: token2

private List<Map<String, String>> robot = new ArrayList<>();

 public List<Map<String, String>> getRobot() {
        return robot;
    }