解决cvc-complex-type.2.4.c: 通配符的匹配很全面, 但无法找到元素 ‘context:property-placeholder‘ 的声明的问题~

报错如下：

解决方法：

将声明修改为如下所示即可

<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/context
          https://www.springframework.org/schema/context/spring-context.xsd
          http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd">