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Neo4j 4.0.0抛出NullPointerException

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我是 Spring 季启动和ne04j的新蜜蜂 . 我正在开发包含2个模块web和核心的项目.Web（包作为战争）模块包含spring控制器和Core（包作为jar）模块包含neo4j存储库和域 . Web模块包含Core模块作为jar . 当我使用java -jar web / target / my-project-1.0-SNAPSHOT.war运行项目时，它抛出NullPointerException .

Spring Boot版本：1.3.0.RELEASE Neo4j：4.0.0.RELEASE

以下是日志

org.springframework.web.util.NestedServletException：请求处理失败;嵌套异常是org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:982）〜[spring-webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]中的java.lang.NullPointerException org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:861）〜[spring-webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]，位于javax.servlet.http.HttpServlet.service （HttpServlet.java:622）〜[tomcat-embed-core-8.0.28.jar！/：8.0.28]在org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:846）〜[spring- webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在javax.servlet.http.HttpServlet.service（HttpServlet.java:729）〜[tomcat-embed-core-8.0.28.jar！/ ：8.0.28] org.eclipse上的org.eclipse.jetty.servlet.ServletHolder.handle（ServletHolder.java:812)~ [jetty-servlet-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.springframework.web.filter.Request中的.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1669)~ [jetty-servlet-9.2.14.v20151106.jar！/：9.2.14.v20151106]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）的ContextFilter.doFilterInternal（RequestContextFilter.java:99）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] ）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1652）〜[jetty-servlet- 9.2.14.v20151106.jar！/：9.2.14.v20151106] org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal（HttpPutFormContentFilter.java:87）〜[spring-web-4.2.3.RELEASE.jar！/ ：4.2.3.RELEASE] org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] at org org.springframework.web.filter上的.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1652）〜[jetty-servlet-9.2.14.v20151106.jar！/：9.2.14.v20151106] . HiddenHttpMethodFilter.doFilterInternal（HiddenHttpMethodFilter.java：77）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEAS E]在org.eclipse.jetty的org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] . servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1652）〜[jetty-servlet-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter） .java：121）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring- web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1652）〜[jetty-servlet-9.2.14.v20151106 .jar！/：9.2.14.v20151106]在org.eclipse.jetty.servlet.ServletHandler.doHandle（ServletHandler.java:585）[jetty-servlet-9.2.14.v20151106.jar！/：9.2.14.v20151106在org.eclipse.jetty.server.handler.ScopedHandler.handle（ScopedHandler.java:143）[jetty-server-9.2.14.v20151106.jar！/：9.2.14 .v20151106] org.eclipse.jetty（SecurityHandler.java:577）[jetty-security-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.eclipse.jetty . server.session.SessionHandler.doHandle（SessionHandler.java:223）[jetty-server-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.eclipse.jetty.server.handler.ContextHandler.doHandle（ ContextHandler.java:1127）[jetty-server-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.eclipse.jetty.servlet.ServletHandler.doScope（ServletHandler.java:515）[jetty-servlet] -9.2.14.v20151106.jar！/：9.2.14.v20151106]在org.eclipse.jetty.server.session.SessionHandler.doScope（SessionHandler.java:185）[jetty-server-9.2.14.v20151106.jar ！/：9.2.14.v20151106]在org.eclipse.jetty.server.handler.ContextHandler.doScope（ContextHandler.java:1061）[jetty-server-9.2.14.v20151106.jar！/：9.2.14.v20151106 ] 在在org.eclipse.jetty.server上的org.eclipse.jetty.server.handler.ScopedHandler.handle（ScopedHandler.java:141）[jetty-server-9.2.14.v20151106.jar！/：9.2.14.v20151106] . handler.HandlerWrapper.handle（HandlerWrapper.java:97）[jetty-server-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.eclipse.jetty.server.Server.handle（Server.java： 499）[jetty-server-9.2.14.v20151106.jar！/：9.2.14.v20151106] org.eclipse.jetty.server.HttpChannel.handle（HttpChannel.java:311）[jetty-server-9.2.14 .v20151106.jar！/：9.2.14.v20151106]在org.eclipse.jetty.server.HttpConnection.onFillable（HttpConnection.java:257）[jetty-server-9.2.14.v20151106.jar！/：9.2.14 .v20151106]在org.eclipse.jetty的org.eclipse.jetty.io.AbstractConnection $ 2.run（AbstractConnection.java:544）[jetty-io-9.2.14.v20151106.jar！/：9.2.14.v20151106] .util.thread.QueuedThreadPool.runJob（QueuedThreadPool.java:635）[jetty-util-9.2.14.v20151106.jar！/：9.2.14.v20151106]在org.eclipse.jetty.util.thread.QueuedThreadPool $ 3 . run（QueuedThreadPool.java:555）[jetty-ut il. 9.2.14.v20151106.jar！/：9.2.14.v20151106] at java.lang.Thread.run（Thread.java:745)[na:1.7.0_79]引起：java.lang.NullPointerException：null at org.neo4j.ogm.metadata.MetaData.entityType（MetaData.java:231）〜[neo4j-ogm-1.1.2.jar！/：na] at org.neo4j.ogm.session.Neo4jSession.entityType（Neo4jSession . java：451）〜[neo4j-ogm-1.1.2.jar！/：na] at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll（LoadByTypeDelegate.java:55）〜[neo4j-ogm-1.1.2 .jar！/：na] at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll（LoadByTypeDelegate.java:99）〜[neo4j-ogm-1.1.2.jar！/：na] at org.neo4j.ogm .session.Neo4jSession.loadAll（Neo4jSession.java:119）〜[neo4j-ogm-1.1.2.jar！/：na] at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll（GraphRepositoryImpl.java:123） 〜[spring-data-neo4j-4.0.0.RELEASE.jar！/：na] org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll（GraphRepositoryImpl.java:118)~ [spring-data-neo4j-4.0 sun.reflect.NativeMethodAccess .0.RELEASE.jar！/：na] orImpl.invoke0（本机方法）〜[na：1.7.0_79] at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）〜[na：1.7.0_79] at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java ：43）〜[na：1.7.0_79] at java.lang.reflect.Method.invoke（Method.java:606）〜[na：1.7.0_79] at org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.executeMethodOn（RepositoryFactorySupport.java:475）〜[spring-data-commons-1.11.0.RELEASE.jar！/：na] at org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.doInvoke（ RepositoryFactorySupport.java:460)~ [spring-data-commons-1.11.0.RELEASE.jar！/：na] at org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.invoke（RepositoryFactorySupport.java:432 ）〜[spring-data-commons-1.11.0.RELEASE.jar！/：na] org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMeth） odInvocation.java:179）〜[spring-aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] org.springframework.transaction.interceptor.TransactionInterceptor $ 1.proceedWithInvocation（TransactionInterceptor.java:99）〜[在org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction（TransactionAspectSupport.java:281）〜[spring-tx-4.2.3.RELEASE]的spring-tx-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] .jar！/：4.2.3.RELEASE]在org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:96）〜[spring-tx-4.2.3.RELEASE.jar！/：4.2.3 . 发布在org.springframework.dao的org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:179）〜[spring-aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] . org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（Reflecti）中的support.PersistenceExceptionTranslationInterceptor.invoke（PersistenceExceptionTranslationInterceptor.java：136）〜[spring-tx-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] veMethodInvocation.java:179）〜[spring-aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke（ExposeInvocationInterceptor.java:92）〜[spring -aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:179）〜[spring-aop-4.2.3.RELEASE . jar！/：4.2.3.RELEASE]在org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:208）com.sun.proxy上的〜[spring-aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] . $ Proxy60.findAll（未知来源）〜[na：na]在com.ng.adm . neo.serviceImpl.TaskServiceImpl.tasks（TaskServiceImpl.java:22）〜[adm-core-1.0-SNAPSHOT.jar！/：1.0-SNAPSHOT] at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）〜[na：1.7 . 0_79] at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）〜[na：1.7.0_79] at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）〜[na：1.7.0_79] at java .lang.reflect.Method.invoke（Method.java:606）〜[na：1.7.0_79] org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection（AopUtils.java:302）〜[spring-aop-4.2 . 3.RELEASE.jar！/：4.2.3.RELEASE]在org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint（ReflectiveMethodInvocation.java:190）〜[spring-aop-4.2.3.RELEASE.jar！/：4.2 .3.RELEASE]在org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:157）〜[spring-ao p-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在org.springframework.transaction.interceptor.TransactionInterceptor $ 1.proceedWithInvocation（TransactionInterceptor.java:99）〜[spring-tx-4.2.3.RELEASE . jar！/：4.2.3.RELEASE]在org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction（TransactionAspectSupport.java:281）〜[spring-tx-4.2.3.RELEASE.jar！/：4.2.3.RELEASE在Org.springframework.aop.framework的org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:96）〜[spring-tx-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] .ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:179）〜[spring-aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java： 208）〜[spring-aop-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] at com.sun.proxy . $ Proxy73.tasks（Unknown Source）〜[na：na] at com.ng. adm.web.controllers.TaskApiController.tasks（TaskApiController.java:34）〜[classes！/：na] at su n.reflect.NativeMethodAccessorImpl.invoke0（Native方法）〜[na：1.7.0_79] at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）〜[na：1.7.0_79] at sun.reflect.DelegatingMethodAccessorImpl.invoke （DelegatingMethodAccessorImpl.java:43）〜[na：1.7.0_79]在org.springframework.web.method.support的java.lang.reflect.Method.invoke（Method.java:606）〜[na：1.7.0_79] .invocableHandlerMethod.doInvoke（InvocableHandlerMethod.java:222）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod . java：137）〜[spring-web-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:110 ）〜[spring-webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:814)~ [小号pring-webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:737）〜[spring-webmvc -4.2.3.RELEASE.jar！/：4.2.3.RELEASE]在org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:85）〜[spring-webmvc-4.2.3 . RELEASE.jar！/：4.2.3.RELEASE]在org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:959）〜[spring-webmvc-4.2.3.RELEASE.jar！/：4.2.3 .RELEASE]在org.springframework.web的org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:893）〜[spring-webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE] .servlet.FrameworkServlet.processRequest（FrameworkServlet.java：970）〜[spring-webmvc-4.2.3.RELEASE.jar！/：4.2.3.RELEASE]

下面是我的web模块控制器（内战）

enter code here

@Controller("")
public class TaskApiController {

    @Autowired
    TaskService taskService;

    @Autowired
    TaskRepository repository; 

    @ResponseBody
    @RequestMapping(value = "api/tasks", method= RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public List<Task> tasks(@RequestParam(value = "limit",required = false) Integer limit) {
        return taskService.tasks(limit == null ? 100 : limit);
    }

}

下面是来自Core模块的Neo4j域（在jar内）

enter code here

Configuration
@ConfigurationProperties(prefix = "neo4j")
@EnableNeo4jRepositories("com.ng.adm.neo")
public class Neo4jConfig extends Neo4jConfiguration{

    private String protocol;
    private String host;
    private String port;
    private String userName;
    private String password;
    private String url;
    private String domainPackage;

    @Bean
    public Neo4jServer neo4jServer() {
        return new RemoteServer(this.protocol+this.host+":"+this.port,this.userName,this.password);
    }

    @Bean
    public SessionFactory getSessionFactory() {
        return new SessionFactory(this.domainPackage);
    }



    public String getProtocol() {
        return protocol;
    }

    public void setProtocol(String protocol) {
        this.protocol = protocol;
    }

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public String getPort() {
        return port;
    }

    public void setPort(String port) {
        this.port = port;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getDomainPackage() {
        return domainPackage;
    }

    public void setDomainPackage(String domainPackage) {
        this.domainPackage = domainPackage;
    }   
}

以下是来自Core模块的Neo4j配置（在jar内）

enter code here

@JsonIdentityInfo(generator=JSOGGenerator.class)
@NodeEntity
public class Task {

    @GraphId Long id;
    String taskName;
    String taskDescription;
    String taskPriority;
    String taskStatus;
    int taskArchived = 0;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public int getTaskArchived() {
        return taskArchived;
    }

    public String getTaskName() {
        return taskName;
    }

    public void setTaskName(String taskName) {
        this.taskName = taskName;
    }

    public String getTaskDescription() {
        return taskDescription;
    }

    public void setTaskDescription(String taskDescription) {
        this.taskDescription = taskDescription;
    }

    public String getTaskPriority() {
        return taskPriority;
    }

    public void setTaskPriority(String taskPriority) {
        this.taskPriority = taskPriority;
    }

    public String getTaskStatus() {
        return taskStatus;
    }

    public void setTaskStatus(String taskStatus) {
        this.taskStatus = taskStatus;
    }

    public int isTaskArchived() {
        return taskArchived;
    }

    public void setTaskArchived(int taskArchived) {
        this.taskArchived = taskArchived;
    }

    @Override
    public String toString() {
        return "Task [id=" + id + ", taskName=" + taskName
                + ", taskDescription=" + taskDescription + ", taskPriority="
                + taskPriority + ",taskStatus=" + taskStatus + "]";
    }

}
enter code here

Below is my repository from Core module (inside Jar)

    enter code here

@RepositoryRestResource(collectionResourceRel = "tasks", path = "tasks")
public interface TaskRepository extends GraphRepository<Task> {

    List<Task> findByTaskArchived(@Param("archivedfalse") int taskArchivedFalse);
    List<Task> findByTaskStatus(@Param("status") String taskStatus);

    /*Student findByFirstName(@Param("firstName") String fname);

    @Query("MATCH (n:Student) RETURN n LIMIT {limit}")
    List<Map<String,Object>> students(@Param("limit") int limit);*/
}

下面是来自Core模块的我的服务类（在jar里面）

enter code here


@Service
@Transactional
public class TaskServiceImpl implements TaskService{

    @Autowired TaskRepository taskRepository;

    @Override
    public List<Task> tasks(int limit) {
        Iterable<Task> result = taskRepository.findAll();
        return (List<Task>) AppUtils.makeCollection(result);
    }

}

当我从mvn spring-boot：run命令运行项目时它正在工作，但是从命令java -jar web / target / my-project-1.0-SNAPSHOT.war获取异常 .

请帮我找到问题 .

提前致谢 .

spring neo4j spring-boot spring-data-neo4j

2 回答

  • 3

    我有同样的错误，这是由于我的域包在SessionFactory bean中不正确 .

    @Bean
public SessionFactory getSessionFactory() {
    return new SessionFactory("com.make.sure.this.is.right");
}

    注意，你可以传递多个包参数 .

    回复于
  • 1

    认为这个问题已修复 - 请将neo4j-ogm依赖版本升级到1.1.4

    回复于

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