查看Spring MVC 父容器和子容器的对象的实例

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话不多说，直接上案例

package com.oukele.web;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.context.WebApplicationContext;

import java.util.HashMap;

import java.util.Objects;

@Controller

public class HelpController {

    //在子容器中 注入一个 WebApplicationContext 的实例

    @Autowired

    private WebApplicationContext webApplicationContext;

    @RequestMapping(path = "/Ioc",method = RequestMethod.GET)

    @ResponseBody

    public HashMap<String,String[]> allInIoc(){

        return new HashMap<String, String[]>(){{

            put("子容器",webApplicationContext.getBeanDefinitionNames());

            put("父容器", Objects.requireNonNull(webApplicationContext.getParent()).getBeanDefinitionNames());

        }};

    }

}