springboot在工具类中注入bean（ApplicationContextAware）

1、创建测试类1（MyService1.java）

package com.jeff.service;

import org.springframework.stereotype.Service;

@Service
public class MyService1 {

	public void save() {
		System.out.println(">>>>>>>>>>>>>>> MyService1执行save <<<<<<<<<<<<<<<");
	}

}

2、创建测试类2（MyService2.java）

package com.jeff.service;

import org.springframework.stereotype.Service;

@Service
public class MyService2 {

	public void save() {
		System.out.println(">>>>>>>>>>>>>>> MyService2执行save <<<<<<<<<<<<<<<");
	}

}

3、创建工具类（SpringUtil.java）

package com.jeff.utils;

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

@Component
public class SpringUtil implements ApplicationContextAware {

	private static ApplicationContext context;

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

	// 获得applicationContext
	public static ApplicationContext getApplicationContext() throws Exception {
		isContext();
		return context;
	}

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

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

	// 判断application是否为空
	public static void isContext() throws Exception {
		if (context == null) {
			throw new Exception("application未注入");
		}
	}

}

4、创建工具类（MyUtil.java）

package com.jeff.utils;

import com.jeff.service.MyService1;
import com.jeff.service.MyService2;

public class MyUtil {

	public static void getBean() throws Exception {
		SpringUtil.getBean(MyService1.class).save();
	}

	public static void getBeanByName(String name) throws Exception {
		((MyService2) SpringUtil.getBean(name)).save();
	}

}

5、创建测试类（MyController.java）

package com.jeff.controller;

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

import com.jeff.utils.MyUtil;

@RestController
public class MyController {

	@RequestMapping("myTest")
	public String myTest() {
		try {
			MyUtil.getBean();
			MyUtil.getBeanByName("myService2");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "success";
	}

}

6、控制台输出结果