Springboot获取容器中bean的方法

一、@Autowired注解方式

@RestController
@RequestMapping("/name")
public class OtherController {

    ///  默认按照类型(包含子类)查找，指定名称时按照名称查找
    @Autowired
    /// @Qualifier("otherServiceImpl")
    private OtherService otherService;
    
    ......
}

二、静态方法方式

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * Springboot静态方法获取bean
 */
@Component
public class MyApplicationContextAware implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    ///  启动时自动执行，传参 org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        MyApplicationContextAware.applicationContext = applicationContext;
    }

    ///  传参样例：com.smy.other.controller.OtherController
    public static <T> T  getBean(String className) throws ClassNotFoundException {

        Class<T> clazz = (Class<T>) Class.forName(className);
        return getBean(clazz);
    }

    /// 传参样例：OtherController.class
    public static <T> T  getBean(Class<T> clazz) {

        return applicationContext != null ? applicationContext.getBean(clazz) : null;
    }

    /// 传参样例：OtherController.class, otherController
    public static <T> T  getBean(Class<T> clazz, String beanName) {

        return applicationContext != null ? applicationContext.getBean(beanName, clazz) : null;
    }

}

或

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;


@SpringBootApplication
public class OtherApplication {

    public static ConfigurableApplicationContext applicationContext;

    public static void main(String[] args) {

        applicationContext = SpringApplication.run(OtherApplication.class, args);
    }

}