关于ApplicationContext的三个常用实现类

public class Client {
    public static void main(String[] args) {
        ApplicationContext context = 
			new FileSystemXmlApplicationContext("C:\\Users\\ghh\\Desktop\\bean.xml");
        AccountService service = context.getBean("accountService", AccountService.class);
        AccountDao accountDao = context.getBean("accountDao", AccountDao.class);
        System.out.println(service);
        System.out.println(accountDao);
    }
}

public class Client {
    public static void main(String[] args) {
        ApplicationContext context =
                new ClassPathXmlApplicationContext("bean.xml");
        AccountService service = context.getBean("accountService", AccountService.class);
        AccountDao accountDao = context.getBean("accountDao", AccountDao.class);
        System.out.println(service);
        System.out.println(accountDao);
    }
}

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
 
@Component
public class SpringUtils implements ApplicationContextAware {
 
    private static ApplicationContext applicationContext;
 
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringUtils.applicationContext = applicationContext;
    }
 
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
 
    public static Object getBean(String name) {
        return applicationContext.getBean(name);
    }
 
    public static <T> T getBean(Class<T> requiredType) {
        return applicationContext.getBean(requiredType);
    }
 
}

@ComponentScan(basePackages = {"com.basic.common"})
public class BasicCommonApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(BasicCommonApplication.class, args);
    }
 
    @Bean
    public DozerBeanMapperFactoryBean dozerBeanMapperFactoryBean() {
        return new DozerBeanMapperFactoryBean();
    }
 
}