1.继承ApplicationObjectSupport类

@Component
public class MyController  extends ApplicationObjectSupport {
//....

}

2. 从容器中拿出来

@Component
public class MyController  {

    @Autowired
    private ApplicationContext applicationContext;

}

3. 继承ApplicationContextAware 实现静态调用

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.web.context.support.WebApplicationContextUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class SpringContextHolder implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    /**
     * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextHolder.applicationContext = applicationContext; // NOSONAR
    }

    /**
     * 取得存储在静态变量中的ApplicationContext.
     */
    public static ApplicationContext getApplicationContext() {
        checkApplicationContext();
        return applicationContext;
    }

    /**
     * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        checkApplicationContext();
        return (T) applicationContext.getBean(name);
    }

    /**
     * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<T> clazz) {
        checkApplicationContext();
        return (T) applicationContext.getBeansOfType(clazz);
    }

    /**
     * 清除applicationContext静态变量.
     */
    public static void cleanApplicationContext() {
        applicationContext = null;
    }

    private static void checkApplicationContext() {
        if (applicationContext == null) {
            throw new IllegalStateException(
                    "applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");
        }
    }

    public static void setHttpRequestResponseHolder(HttpServletRequest request, HttpServletResponse response){
        responseThreadLocal.set(response);
        ApplicationContext ap = WebApplicationContextUtils.getWebApplicationContext(null);
    }
    public static HttpServletResponse getHttpResponse(){
        return responseThreadLocal.get();
    }

    public static void clean(){
        responseThreadLocal.remove();
    }

    private static final ThreadLocal<HttpServletResponse> responseThreadLocal = new ThreadLocal();

}

启动类里直接赋值

public class SpringContextUtil {
    private static ApplicationContext applicationContext;
        //获取上下文
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
    //设置上下文
    public static void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextUtil.applicationContext = applicationContext;
    }
}

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        ApplicationContext app =  SpringApplication.run(Application.class, args);
        SpringContextUtil.setApplicationContext(app);
    }

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