org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.UnsupportedOperationException### The error may exist in file [E:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\day13_Pritice\WEB-INF\classes\com\wu\employee\mapper\IDepartmentMapper.xml]### The error may involve com.wu.employee.mapper.IDepartmentMapper.getAllDepartment### The error occurred while handling results### SQL: SELECT * FROM department### Cause: java.lang.UnsupportedOperationException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:943)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:822)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)