@ConfigurationProperties(pref="")加载局部配置文件

刚开始@ConfigurationProperties（文件名）直接在参数里加文件名，其实是配置前缀pref="前缀"。加载局部配置文件是@PropertySource(value = {"classpath:abc.properties"})文件是properties类型。如果是yml类型，无法赋值显示null。

@Component
@PropertySource(value = {"classpath:abc.properties"})
@ConfigurationProperties(prefix = "emp")
public class Emp {
	
	String name ;

　加载xml配置文件 实例化bean　写成stuxml.xml没有写classpath报错

@ImportResource(locations = {"classpath:stuxml.xml"})

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@ImportResource(locations = {"classpath:stuxml.xml"})
@SpringBootApplication
public class Demo3Application {

	public static void main(String[] args) {
		SpringApplication.run(Demo3Application.class, args);
	}

}

　　bean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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--
        加载一个xml，这个作为总的xml入口

    <import resource="beans2.xml"/>
    -->
    <bean id="stu" class="com.example.demo.Stu">
        <property name="name" value="xiaochun" />
    </bean>


</beans>

　　实体类

package com.example.demo;

public class Stu {
	String name ;

	@Override
	public String toString() {
		return "Stu [name=" + name + "]";
	}