SpringBoot--基础--09--条件注解

SpringBoot–基础–09–条件注解

一、条件注解

1.1、代码和测试

SysService

public interface SysService {
	void show();
}

WindowService

public class WindowService implements SysService {
	@Override
	public void show() {
		System.out.println("我是Window");
	}
}

LinuxService

public class LinuxService  implements  SysService{
	@Override
	public void show() {
		System.out.println("我是linux");
	}
}

LinuxCondition

public class LinuxCondition implements Condition {
	@Override
	public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
		String sysName = context.getEnvironment().getProperty("os.name");
		if (sysName.contains("Linux")) {
			return true;
		}
		return false;
	}
	
}

WindowsCondition

public class WindowsCondition implements Condition {
	@Override
	public boolean matches(ConditionContext context,
						   AnnotatedTypeMetadata metadata) {
		String sysName = context.getEnvironment().getProperty("os.name");
		if (sysName.contains("Windows")) {
			return true;
		}
		return false;
	}

}

ConditionConifg

@Configuration
public class ConditionConifg {
	@Bean
	@Conditional(WindowsCondition.class) // 1如果是wind系统创建对应的bean
	public SysService windowsListService() {
		return new WindowService();
	}
	
	@Bean
	@Conditional(LinuxCondition.class) // 2如果是Linux系统创建对应的bean
	public SysService linuxListService() {
		return new LinuxService();
	}
	
}

Test

public class Test {
	
	public static void main(String[] args) {
		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ConditionConifg.class);


		SysService sysService = context.getBean(SysService.class);

		String sysName = context.getEnvironment().getProperty("os.name");
		System.out.println("当前的操作系统是："+sysName);

		System.out.println("------------------------------------");
		sysService.show();
	   
	}
	
}

代码位置
https://gitee.com/DanShenGuiZu/learnDemo/tree/mysql_mybaties_DB/springboot-learn/springboot-4