org.xml.sax.SAXParseException; lineNumber: 34; columnNumber: 30; The content of elements must consis

org.xml.sax.SAXParseException; lineNumber: 34; columnNumber: 30; The content of elements must consis

原因：在用mybatis操作数据库，写sql时，sql中含有 < 、> 等xml语法的符号，需要把这些符号转义，例如，大于号使用的是>小于号使用的是<

ERROR [http-nio-12030-exec-2][SqlExecutors.java:66] - Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 34; columnNumber: 30; The content of elements must consist of well-formed character data or markup.
org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 34; columnNumber: 30; The content of elements must consist of well-formed character data or markup.
 at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:259) ~[mybatis-3.4.6.jar:3.4.6]    f
 at org.apache.ibatis.parsing.XPathParser.(XPathParser.java:115) ~[mybatis-3.4.6.jar:3.4.6]
 at org.apache.ibatis.scripting.xmltags.XMLLanguageDriver.createSqlSource(XMLLanguageDriver.java:51) ~[mybatis-3.4.6.jar:3.4.6]