applicationContext工具類, 其實現方式有多種. 比如實現ApplicationContextAware.
或者通過@Autowired注入. 或者將其作為工具類成員變數, 通過構造方法注入(spring新特性, 會在初始化bean時, 將其有例項注入其建構函式中的引數中). 如下程式碼是第一種實現.
程式碼如下

package com.markor.hello.applicationcontext;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @describe: applicationContextUtils工具類
 * @author: caichangmeng <
 
[email protected]>
 * @since: 2018/10/24
 */
@Component
public class ApplicationContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

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

    public Object getBean(Class clazz) {
        return applicationContext.getBean(clazz);
    }
}