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java Servlet应该有映射，但找不到Servlet

5 月，3 周 Questions & Answers

我正在尝试使用spring和hibernate构建一个java web应用程序，当我尝试使用tomcat启动它时，我得到了一个关于我的web的错误。xml。当我上网的时候。我明白了：

<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        **<servlet-name>rest</servlet-name> <-------here I get Servlet should have mapping**
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        **<servlet-name>rest</servlet-name> <---Here I get cannot find servlet**
        <url-pattern>/api/*</url-pattern>
    </servlet-mapping>

我仅有的映射是

@RestController
public class ClientController {

    @Autowired
    private ClientService clientService;

    @RequestMapping(value="/clients", method = RequestMethod.GET, produces = "application/vnd.api+json")
    public ClientsDto getClients() {
        List<Client> clientList = clientService.findAll();
        return new ClientsDto(clientList);
    }
}

当我尝试运行Tomcat时，我得到的完整错误是：

Connected to server
[2016-05-05 08:40:35,438] Artifact tryHW-web:war exploded: Artifact is being deployed, please wait...
05-May-2016 20:40:39.916 WARNING [RMI TCP Connection(3)-127.0.0.1] org.apache.tomcat.dbcp.dbcp2.BasicDataSourceFactory.getObjectInstance Name = mpp Property maxActive is not used in DBCP2, use maxTotal instead. maxTotal default value is 8. You have set value of "100" for "maxActive" property, which is being ignored.
05-May-2016 20:40:39.917 WARNING [RMI TCP Connection(3)-127.0.0.1] org.apache.tomcat.dbcp.dbcp2.BasicDataSourceFactory.getObjectInstance Name = mpp Property maxWait is not used in DBCP2 , use maxWaitMillis instead. maxWaitMillis default value is -1. You have set value of "10000" for "maxWait" property, which is being ignored.
05-May-2016 20:40:40.126 INFO [RMI TCP Connection(3)-127.0.0.1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2016-05-05T20:40:43,667 WARN  [RMI TCP Connection(3)-127.0.0.1]: nnotationConfigWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clientServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private shop.tryHW.core.repository.ClientRepository shop.tryHW.core.service.ClientServiceImpl.clientRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [shop.tryHW.core.repository.ClientRepository] 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)} 
2016-05-05T20:40:43,729 ERROR [RMI TCP Connection(3)-127.0.0.1]: ContextLoader                        - Context initialization failed 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clientServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private shop.tryHW.core.repository.ClientRepository shop.tryHW.core.service.ClientServiceImpl.clientRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [shop.tryHW.core.repository.ClientRepository] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) [spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) [spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4732) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5194) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:152) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:726) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:702) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1702) [catalina.jar:9.0.0.M4]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_31]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_31]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_31]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_31]
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300) [tomcat-coyote.jar:9.0.0.M4]
05-May-2016 20:40:43.741 SEVERE [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal One or more listeners failed to start. Full details will be found in the appropriate container log file
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [?:1.8.0_31]
05-May-2016 20:40:43.743 SEVERE [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal Context [] startup failed due to previous errors
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [?:1.8.0_31]
    at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:482) [catalina.jar:9.0.0.M4]
    at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431) [catalina.jar:9.0.0.M4]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_31]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_31]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_31]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_31]
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300) [tomcat-coyote.jar:9.0.0.M4]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [?:1.8.0_31]
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [?:1.8.0_31]
    at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1466) [?:1.8.0_31]
    at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) [?:1.8.0_31]
    at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1307) [?:1.8.0_31]
    at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1399) [?:1.8.0_31]
    at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:828) [?:1.8.0_31]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_31]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_31]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_31]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_31]
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:323) [?:1.8.0_31]
    at sun.rmi.transport.Transport$1.run(Transport.java:200) [?:1.8.0_31]
    at sun.rmi.transport.Transport$1.run(Transport.java:197) [?:1.8.0_31]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_31]
    at sun.rmi.transport.Transport.serviceCall(Transport.java:196) [?:1.8.0_31]
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568) [?:1.8.0_31]
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826) [?:1.8.0_31]
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$240(TCPTransport.java:683) [?:1.8.0_31]
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$1/1480363463.run(Unknown Source) [?:1.8.0_31]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_31]
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682) [?:1.8.0_31]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_31]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_31]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_31]
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private shop.tryHW.core.repository.ClientRepository shop.tryHW.core.service.ClientServiceImpl.clientRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [shop.tryHW.core.repository.ClientRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    ... 59 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [shop.tryHW.core.repository.ClientRepository] 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)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1119) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    ... 59 more
[2016-05-05 08:40:43,811] Artifact tryHW-web:war exploded: Error during artifact deployment. See server log for details.
05-May-2016 20:40:45.124 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory D:\Prog\apache-tomcat-9.0.0.M4\webapps\manager
05-May-2016 20:40:45.448 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory D:\Prog\apache-tomcat-9.0.0.M4\webapps\manager has finished in 323 ms

以下是ClientController的代码：

@RestController
public class ClientController {

    @Autowired
    private ClientService clientService;

    @RequestMapping(value="/clients", method = RequestMethod.GET, produces = "application/vnd.api+json")
    public ClientsDto getClients() {
        List<Client> clientList = clientService.findAll();
        return new ClientsDto(clientList);
    }

}

我完全不知道我在问什么，也不知道问题出在哪里。 你知道怎么了吗？我不明白它在问我什么。我没有上下文xml或类似的东西。我只有一张网。xml

这是否与类实例化有关，或者为什么@Autowired不起作用


共 (1) 个答案

  1. # 1 楼答案

    您的ClientRepository尚未扫描到spring应用程序上下文中。请确保上面有@Repository注释或其他bean注释，并且可以由spring framework自动扫描。比如它的基本包在扫描路径上