ssf定义报错，说解析错误SAXReader

Question

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ssf' defined in URL [file:/E:/apache-tomcat-7.0.67/webapps/myHobby/WEB-INF/classes/applicationContext.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [E:\apache-tomcat-7.0.67\webapps\myHobby\WEB-INF\classes\applicationContext.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error creating document instance. Cause: org.xml.sax.SAXParseException; lineNumber: 13; columnNumber: 108; 文档根元素 "beans" 必须匹配 DOCTYPE 根 "null"。