这个问题，其实以前也碰到过，并且已经解决。
但是不巧的事又碰到了，看到问题，知道是mapper里面的问题，但看了半天，好像也没有错。
Scanned package: 'com.Xxxx.XX.model' for aliases Property 'mapperLocations' was not specified or no matching resources found 16:21:16.905 [restartedMain] ERROR o.m.spring.mapper.MapperFactoryBean - Error while adding the mapper 'interface com.Xxxx.XX.mapper.XXMapper' to configuration. org.apache.ibatis.builder.BuilderException: Could not find value method on SQL annotation. Cause: org.apache.ibatis.builder.BuilderException: Error creating document instance. Cause: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 223; The content of elements must consist of well-formed character data or markup. at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.getSqlSourceFromAnnotations(MapperAnnotationBuilder.java:472) at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parseStatement(MapperAnnotationBuilder.java:289) at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(MapperAnnotationBuilder.java:134) at org.apache.ibatis.binding.MapperRegistry.addMapper(MapperRegistry.java:72) at org.apache.ibatis.session.Configuration.addMapper(Configuration.java:728) at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:80) at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:925) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) at com.Xxxx.Xx.XXXApplication.main(XXXApplication.java:48) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) Caused by: org.apache.ibatis.builder.BuilderException: Error creating document instance. Cause: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 223; The content of elements must consist of well-formed character data or markup. at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:259) at org.apache.ibatis.parsing.XPathParser.<init>(XPathParser.java:115) at org.apache.ibatis.scripting.xmltags.XMLLanguageDriver.createSqlSource(XMLLanguageDriver.java:51) at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.buildSqlSourceFromStrings(MapperAnnotationBuilder.java:482) at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.getSqlSourceFromAnnotations(MapperAnnotationBuilder.java:465) ... 29 common frames omitted
解决：
问题在于用了时间比较的 >= <=
这样就会报错，应该用转义的字符。>= <=
这个与html中的一致。
以上的表格来于：https://blog.csdn.net/qq_27918787/article/details/52658458