Spring上下文( ApplicationContext)

  如果说BeanFactory是Spring的心脏，那么ApplicationContext就是完整的身躯了。ApplicationContext由BeanFactory派生而来，提供了更多面向实际应用的功能。

实现ApplicationContextAware接口

package com.permission.common;

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

/**
 * @version:1.0.0
 * @author: lironghong
 * @date: 2019/4/21 21:04
 * @description: ApplicationContext获取上下文
 */
@Component("ApplicationContextHelper")
public class ApplicationContextHelper implements ApplicationContextAware {
    private static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
    }

    public static <T> T popBean(Class<T> tClass) {
        if (context == null) {
            return null;
        }
        return context.getBean(tClass);
    }

    public static <T> T popBean(String name, Class<T> tClass) {
        if (context == null) {
            return null;
        }
        return context.getBean(name,tClass);
    }
}

配置被spring管理(spring-servlet.xml)

<bean class="com.permission.common.ApplicationContextHelper" lazy-init="false"></bean>

测试

    @RequestMapping("/validator.json")
    @ResponseBody
    public JsonData validator(TestVo vo) throws ParamException {
        log.info("validator");
        SysAclMapper sysAclMapper = ApplicationContextHelper.popBean(SysAclMapper.class);
        SysAcl sysAcl = sysAclMapper.selectByPrimaryKey(1);
        log.info(JsonUtils.objtoString(sysAcl)+"哈哈");
        BeanValidator.check(vo);
        return JsonData.success("test validator");

    }