1. From the alias (recommended to use the second kind)
<!--别名，如果添加了别名，我们也可以使用别名获取到-->
<alias name="user" alias="userNew"></alias>
2. Bean configuration
<!--
id:bean的唯一标识符，相当于我们学的对象名；
class：bean对象所对应的全限定名：包名+类名；
name：也是别名，可以同时取多个别名，逗号分割(推荐使用)
-->
<bean id="user" class="com.kuang.pojo.user" name="user2,u2 u3;u4">
</bean>
3. Use of import
For example, a team develops a project, but Zhang San ’s configuration is bean.xml, Li Si ’s configuration is bean1.xml, and Wang Wu ’s configuration is bean2.xml. Finally, the project merger needs to be placed in a configuration applicationContext.xml. At the time, just use applicationContext.xml directly.
<?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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="beans.xml"/>
<import resource="beans1.xml"/>
<import resource="beans2.xml"/>
</beans>
