获取spring窗口中的注入的类

获取spring窗口中的注入的类

package com.yy.utils;

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

/**
 * @author yayun
 * @version 1.0
 * @description TODO
 * @date 2023/5/7 9:13
 */
@Component
public class ApplicationContextHolder implements ApplicationContextAware , InitializingBean {

    private static ApplicationContext holdApplicationContext;


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

    public static <T> T getBeanByName(String beanName, Class<T> clazz){
        T contextBean = holdApplicationContext.getBean(beanName, clazz);
        return contextBean;
    }



     @Override
     public void afterPropertiesSet() throws Exception {
         String[] names = holdApplicationContext.getBeanDefinitionNames();
         for (String name : names) {
                 System.out.println(">>>>>>" + name);
             }
         System.out.println("------\nBean 总计:" + holdApplicationContext.getBeanDefinitionCount());
     }
}

可与场景使用结合

public interface Eat {

    void test(Person person);
}

@Component("easy")
public class Eat1Impl implements Eat {
    @Override
    public void test(Person person) {
        System.out.println("简单的吃" + person);
    }
}

@Component("complex")
public class Eat2Impl implements Eat {
    @Override
    public void test(Person person) {
        System.out.println("复杂的吃" + person);
    }
}

@Data
public class Person {

    private String name;

    private Integer age;
}

@RestController
public class TestController {

    @GetMapping("/test1/{name}")
    public Object tess1(@PathVariable String name){
        Person person = new Person();
        person.setAge(20);
        person.setName("张三");
        ApplicationContextHolder.getBeanByName(name, Eat.class).test(person);
        return "123";
    }

    @GetMapping("/test2/{name}")
    public Object tess2(@PathVariable String name){
        Person person = new Person();
        person.setAge(48);
        person.setName("李四");
        ApplicationContextHolder.getBeanByName(name, Eat.class).test(person);
        return "1234";
    }
}