启动第一次查询时会出现错误 "Error querying database." 原因: java.lang.NullPointerException

10:03:38 [http-nio-8014-exec-4] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization completed in 48 ms 10:03:38 [http-nio-8014-exec-3] ERROR com.mylike.config.WebMvcConfigurer - 接口 [/open-wechat/tel2openidCrm] 出现异常, 方法: com.mylike.app.client.web.OpenWechatController.tel2openidCrm, 异常摘要: nested exception is org.apache.ibatis.exceptions.PersistenceException: 发生错误查询数据库。 起因: java.lang.NullPointerException 起因: java.lang.NullPointerException org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 发生错误查询数据库。 起因: java.lang.NullPointerException 起因: java.lang.NullPointerException 于 org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) 于 com.sun.proxy.$Proxy91.selectOne(Unknown Source) 于 org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166) 于 org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:83) 于 org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) 于 com.sun.proxy.$Proxy139.tel2openidCrm(Unknown Source) 于 com.mylike.app.client.web.OpenWechatController.tel2openidCrm(OpenWechatController.java:169) 于 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 于 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 于 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 于 java.lang.reflect.Method.invoke(Method.java:498) 于 org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) 于 org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) 于 org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) 于 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) 于 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) 于 org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) 于 org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) 于 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 于 org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) 于 javax.servlet.http.HttpServlet.service(HttpServlet.java:635) 于 org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 于