Spring Boot 中的多态配置属性

使用多态配置属性是Spring Boot中的一项强大功能，它允许我们通过一组统一的属性来配置不同的实现。这在开发过程中非常有用，因为它提供了一种灵活的方式来管理不同环境下的配置。在本文中，我们将深入探讨Spring Boot中的多态配置属性，并通过一个案例代码来演示其用法。

properties
storage.type=local # for development environment
storage.type=s3 # for production environment

java
@ConfigurationProperties(prefix = "storage")
public interface StorageService {
    void store(MultipartFile file);
}
@Component
public class LocalStorageService implements StorageService {
    private String location;
    public void store(MultipartFile file) {
        // store file locally
    }
    // getter and setter for location
}
@Component
public class S3StorageService implements StorageService {
    private String accessKey;
    private String secretKey;
    private String bucketName;
    public void store(MultipartFile file) {
        // store file in S3
    }
    // getters and setters for accessKey, secretKey, and bucketName
}
@Component
public class MyComponent {
    private StorageService storageService;
    public MyComponent(StorageService storageService) {
        this.storageService = storageService;
    }
    // use storageService to store files
}