beans.xml文件

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.0.xsd"
            >

        <!-- bean definitions here --> 

        <bean id="point" class="com.example.demo.Point">
            <qualifier value="circleRelated" />
            <property name="x" value="0"></property>
            <property name="y" value="0"></property>
        </bean>

        <context:annotation-config/>

        <context:component-scan base-package="com.example.demo" />

使用main方法初始化：

package com.example.demo;

    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;

    @SpringBootApplication
    public class SpringSecondApplication {

        public static void main(String[] args) {
            SpringApplication.run(SpringSecondApplication.class, args);

            ApplicationContext context = new ClassPathXmlApplicationContext ("beans.xml");

            Shape shape = (Shape) context.getBean("circle");
            shape.draw();

        }

    }

圆圈.java

package com.example.demo;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

@Component
@ComponentScan(basePackages="com.example.demo")
public class Circle implements Shape {

    @Autowired
    @Qualifier("circleRelated")
    private Point point;

    public Circle(Point point) {
        super();
        this.point = point;
    }

    public Point getPoint() {
        return point;
    }

    public void setPoint(Point point) {
        this.point = point;
    }

    public void draw() {
        System.out.println("Draw is called");
        System.out.println("center.x:" + point.getX());
        System.out.println("center.y:" + point.getY());
    }

}

点.java

package com.example.demo;

import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

@Component
public class Point {

    private int x;
    private int y;
    public int getX() {
        return x;
    }
    public void setX(int x) {
        this.x = x;
    }
    public int getY() {
        return y;
    }
    public void setY(int y) {
        this.y = y;
    }

}

形状.java

package com.example.demo;

public interface Shape {

    public void draw();

}

获取错误如下：
上下文初始化期间遇到异常-取消刷新尝试：org.springframework.beans.factory.unsatifieddependencyException:创建名为“circle”的bean时出错：通过字段“point”表示的未满足的依赖关系；嵌套异常为org.springframework.beans.factory.nosuchbeandefinitionexception:没有类型为“com.example.demo.point”的合格bean可用：至少需要1个符合autowire候选的bean。依赖项注解：{@org.springframework.beans.factory.annotation.autowired（required=true），@org.springframework.beans.factory.annotation.qualifier（value=circlerrelated）}[2m2021-03-28 12:17:31.958[0；39m[32m信息[0；39m[35m2747[0；39m[2m---[0；39m[2m[干管][0；39m[36M条件评估报告日志监听器[0；39m[2m:[0；3900万
启动applicationcontext时出错。要显示条件报告，请在启用“调试”的情况下重新运行应用程序[2m2021-03-28 12:17:31.977[0；39米[31米]；39m[35m2747[0；39m[2m---[0；39m[2m[干管][0；39m[36mo.s.b.d.记录故障分析报告器[0；39m[2m:[0；3900万
应用程序启动失败
说明：
com.example.demo.circle中的字段点需要找不到类型为“com.example.demo.point”的bean。
注入点具有以下注解：-@org.springframework.beans.factory.annotation.autowired（required=true）-@org.springframework.beans.factory.annotation.qualifier（value=circlerrelated）
找到以下候选对象，但无法注入：-用户定义的bean
行动：
考虑重新访问上面的条目或在配置中定义类型为“com.example.demo.point”的bean。