# 14 Spring Boot 管理 bean

```java
package com.chanshiyu.moemall.service.utils;

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

/**
 * @author SHIYU
 * @date 2019/11/6 15:13
 * @description 提供手动获取被 spring 管理的 bean 对象
 */
public class SpringUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

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

    /**
     * 获取 applicationContext
     */
    private static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过 name 获取 Bean.
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过 class 获取 Bean.
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过 name 以及 Clazz 返回指定的 Bean
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

}
```

调用方法：

```java


@SpringBootApplication
public class Application {


    @Bean
    public SpringUtil getSpringUtil() {
        return new SpringUtil();
    }

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
        ProxyServiceImpl proxyService = SpringUtil.getBean(ProxyServiceImpl.class);
    }

}
```


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