一：Spring Boot在普通类中注入Bean

1:在Controller Service 等中，直接@ Autowired注入bean就好。

但在普通类中这样注入会提示null。对于此类的bean的注入，可以implements ApplicationContextAware。

如下面：调用方式为：UserService userservice = (UserService) SpringContextUtils.getBean(UserService.class);

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ApplicationContextAware;

import org.springframework.stereotype.Component;

@Component

public class SpringContextUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {

        this.applicationContext = applicationContext;

    }

    public static ApplicationContext getApplicationContext() {

        return applicationContext;

    }

    public static Object getBean(String name) {

        return getApplicationContext().getBean(name);

    }

    public static T getBean(Class clazz) {

        return getApplicationContext().getBean(clazz);

    }

    public static T getBean(String name, Class clazz) {

        return getApplicationContext().getBean(name, clazz);

    }

}