今天遇到了个问题，mybatis 老是包错，仔细一看，"select 必选生命为select 型元素"，原因<select ></select> 标签对中我写成了<SELECT></SELECT>
Caused by: org.apache.ibatis.builder.BuilderException: Error creating document instance. Cause: org.xml.sax.SAXParseException; lineNumber: 112; columnNumber: 82; 必须声明元素类型 "SELECT"。
at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:253)
at org.apache.ibatis.parsing.XPathParser.<init>(XPathParser.java:122)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.<init>(XMLMapperBuilder.java:74)
at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:458)
... 51 more
Caused by: org.xml.sax.SAXParseException; lineNumber: 112; columnNumber: 82; 必须声明元素类型 "SELECT"。
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(Unknown Source)
改为小写后一切正常。（！* ___ *！）