Application 上添加的注解含义

素颜马尾好姑娘i 2023-01-08 05:18 11阅读 0赞

### 示例 ###

import com.lenovo.platform.util.PrintApplicationInfo;
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.context.properties.EnableConfigurationProperties;
    import org.springframework.boot.web.servlet.ServletComponentScan;
    import org.springframework.cache.annotation.EnableCaching;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    import org.springframework.context.ConfigurableApplicationContext;
    import org.springframework.scheduling.annotation.EnableAsync;
    import org.springframework.scheduling.annotation.EnableScheduling;
    import org.springframework.transaction.annotation.EnableTransactionManagement;
    import org.springframework.web.bind.annotation.RestController;
    
    @EnableDiscoveryClient // 作为微服务，能够发现服务器并自动注册
    @EnableFeignClients // 能够扫描@FeignClient注解，实现feign API 调用
    
    @RestController // 本类可成为Controller组件，返回类型为responseBody
    @MapperScan({ "com.lenovo.**.mapper"}) // 配置扫描mapper包范围
    @ServletComponentScan // 能够扫描@WebServlet/@WebFilter/@WebListener三个注解标记的Servlet组件
    
    @EnableAsync // 能够实现方法异步调用
    @EnableScheduling // 能够实现方法定时任务
    @EnableTransactionManagement // 能够使方法通过注解实现事务
    
    @EnableConfigurationProperties // 能发现@ConfigurationProperties注解，实现自动获取application中配置的属性
    @EnableCaching // 能够实现组件缓存和接口缓存（@Cacheable(cacheNames = "studentCache", key = "#studentId")）
    //@EnableAdminServer // 开启Eureka 对 springBoot 项目的端点监控
    
    @SpringBootApplication(scanBasePackages = "com.lenovo.**") // springboot启动类注解，标记该类能够配置其他的相关注解、配置组件扫描包范围；
    public class Application { 
    
        public static void main(String[] args) { 
            // 启动spring-boot项目
            ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
            // 打印项目信息
            PrintApplicationInfo.print(context);
        }
    }