Spring @Environment典型用法实战案例

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;

@Component
public class MyComponent {

    @Autowired
    private Environment environment;  // ✅ 正确方式

    // 使用 environment 对象获取属性或 profile
}

@Configuration
@PropertySource("classpath:custom.properties")
public class AppConfig {

    @Autowired
    private Environment env;

    @Bean
    public MyService myService() {
        String customValue = env.getProperty("custom.key");
        return new MyService(customValue);
    }
}

String dbUrl = environment.getProperty("spring.datasource.url");

String appName = environment.getProperty("app.name", "defaultAppName"); // 默认值

Boolean featureEnabled = environment.getProperty("feature.enabled", Boolean.class, false);

String[] activeProfiles = environment.getActiveProfiles();
for (String profile : activeProfiles) {
    System.out.println("Active Profile: " + profile);
}

if (environment.acceptsProfiles("dev")) {
    System.out.println("Running in development mode.");
}

// 或者使用更现代的写法：
if (environment.acceptsProfiles(Profiles.of("dev"))) {
    // dev 环境逻辑
}

import org.springframework.core.env.AbstractEnvironment;
import org.springframework.core.env.PropertySource;

((AbstractEnvironment) environment).getPropertySources().forEach(ps -> {
    System.out.println("Property Source: " + ps.getName());
});