HTTP Status 500 - Servlet.init() for servlet mybatis threw exception

type Exception report

message Servlet.init() for servlet mybatis threw exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet mybatis threw exception

    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)

    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)

    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)

    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)

    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)

    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)

    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    java.lang.Thread.run(Thread.java:745)

root cause

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'patientController1': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.jkw100.ssm.service.impl.PatientServiceImpl com.jkw100.ssm.controller.PatientController1.patientService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.jkw100.ssm.service.impl.PatientServiceImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)

    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1122)

    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)

    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)

    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)

    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)

    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)

    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)

    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:626)

    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)

    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)

    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:651)

    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:599)

    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:665)

    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:518)

    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:459)

    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)

    javax.servlet.GenericServlet.init(GenericServlet.java:158)

    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)

    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)

    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)

    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)

    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)

    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)

    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    java.lang.Thread.run(Thread.java:745)

root cause