在运行添加spring依赖的项目时项目会报错，错误信息为下

1. org.xml.sax.SAXParseException; lineNumber: 9; columnNumber: 76; schema_reference.4: 无法读取方案文档 https://www.springframework.org/schema/beans/spring-beans.xsd, 原因为 1) 无法找到文档; 2) 无法读取文档; 3) 文档的根元素不是 <xsd:schema>。
2. Caused by: java.net.UnknownHostException: www.springframework.org
3. Exception in thread “main” org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 9 in XML document from class path resource [applicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 9; columnNumber: 76; cvc-elt.1: 找不到元素 ‘beans’ 的声明。
4. Caused by: org.xml.sax.SAXParseException; lineNumber: 9; columnNumber: 76; cvc-elt.1: 找不到元素 ‘beans’ 的声明。

问题分析

在配置xml文件时文件头配置为

<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">
</beans>

<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">
</beans>