Java: SpringBoot配置文件读取-数组

方式一：读取使用逗号分隔的数组

application.yml

user:
  # 逗号分隔
  countries: China, American, Germany

直接使用​​@Value​​ 读取配置信息

@Value("${user.countries}")
private String[] countryArray;

方式二：读取yaml的数组

application.yml

user:
  # 数组
  languages:
    - zh
    - en
    - de

使用配置类读取配置信息

LanguageConfig.java

package com.example.demo.config;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
@ConfigurationProperties(prefix = "user")
public class LanguageConfig {

    private List<String> languages;


    public List<String> getLanguages() {
        return languages;
    }

    public void setLanguages(List<String> languages) {
        this.languages = languages;
    }
}

使用自动注入配置类

@Autowired
private LanguageConfig languageConfig;

完整使用示例

package com.example.demo;

import com.example.demo.config.LanguageConfig;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.stream.Stream;

@SpringBootTest
class ApplicationTests {

    @Autowired
    private LanguageConfig languageConfig;

    @Value("${user.countries}")
    private String[] countryArray;

    @Test
    void testLanguageConfig() {
        System.out.println(languageConfig.getLanguages());
        //  [zh, en, de]

        Stream.of(countryArray).forEach(System.out::println);
        // China
        // American
        // Germany
    }

}

参考
​Spring Boot 配置（五）数组​​