Java 当iam试图在springboot中从Mysql数据库获取数据时，iam出现以下错误“0”；给定的id不能为空"；
我正在尝试构建一个简单的项目，并一直在试验SpringDataJPA模块。我使用的是Mysql数据库，我有一个映射到表的实体对象，我正试图从数据库中获取数据，但我在控制台中遇到了以下错误“给定的id不能为null”，对此有什么快速建议吗 控制器类Java 当iam试图在springboot中从Mysql数据库获取数据时，iam出现以下错误“0”；给定的id不能为空"；,java,mysql,spring-boot,jpa,Java,Mysql,Spring Boot,Jpa,我正在尝试构建一个简单的项目，并一直在试验SpringDataJPA模块。我使用的是Mysql数据库，我有一个映射到表的实体对象，我正试图从数据库中获取数据，但我在控制台中遇到了以下错误“给定的id不能为null”，对此有什么快速建议吗 控制器类 @RequestMapping(value = "/getVehicalDetailsById", method = RequestMethod.GET) public HashMap<String, Object
@RequestMapping(value = "/getVehicalDetailsById", method = RequestMethod.GET)
public HashMap<String, Object> getVehicleDetailsById(Long id) {
HashMap<String, Object> map = new HashMap<String, Object>();
Optional<VehicleDetails> data = vehdetrep.findById(id);
map.put("code", "200");
map.put("content", data);
return map;
}
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( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.4)
2021-05-11 17:33:30.251 INFO 9560 --- [ restartedMain] com.ola.OlaApplication : Starting OlaApplication using Java 1.8.0_221 on Darshan with PID 9560 (C:\Users\admin\Downloads\ola\target\classes started by admin in C:\Users\admin\Downloads\ola)
2021-05-11 17:33:30.254 INFO 9560 --- [ restartedMain] com.ola.OlaApplication : No active profile set, falling back to default profiles: default
2021-05-11 17:33:30.380 INFO 9560 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-05-11 17:33:30.380 INFO 9560 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-05-11 17:33:31.559 INFO 9560 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-05-11 17:33:31.664 INFO 9560 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 92 ms. Found 4 JPA repository interfaces.
2021-05-11 17:33:32.492 INFO 9560 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-05-11 17:33:32.511 INFO 9560 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-05-11 17:33:32.511 INFO 9560 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.44]
2021-05-11 17:33:32.649 INFO 9560 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-05-11 17:33:32.649 INFO 9560 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2267 ms
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
2021-05-11 17:33:32.980 INFO 9560 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-05-11 17:33:33.111 INFO 9560 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.29.Final
2021-05-11 17:33:33.448 INFO 9560 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-05-11 17:33:33.643 INFO 9560 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-05-11 17:33:33.645 WARN 9560 --- [ restartedMain] com.zaxxer.hikari.util.DriverDataSource : Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2021-05-11 17:33:34.233 INFO 9560 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-05-11 17:33:34.282 INFO 9560 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL57Dialect
2021-05-11 17:33:35.735 INFO 9560 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-05-11 17:33:35.749 INFO 9560 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-05-11 17:33:35.989 INFO 9560 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-05-11 17:33:42.614 WARN 9560 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-05-11 17:33:43.075 INFO 9560 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-05-11 17:33:45.742 INFO 9560 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-05-11 17:33:45.753 INFO 9560 --- [ restartedMain] com.ola.OlaApplication : Started OlaApplication in 16.009 seconds (JVM running for 16.978)
2021-05-11 17:34:26.082 INFO 9560 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-05-11 17:34:26.083 INFO 9560 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2021-05-11 17:34:26.085 INFO 9560 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Completed initialization in 2 ms
2021-05-11 17:34:26.128 INFO 9560 --- [nio-8080-exec-2] org.apache.tomcat.util.http.Parameters : Invalid chunk starting at byte [0] and ending at byte [2] with a value of [=6] ignored
Note: further occurrences of Parameter errors will be logged at DEBUG level.
2021-05-11 17:34:26.222 ERROR 9560 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: The given id must not be null!; nested exception is java.lang.IllegalArgumentException: The given id must not be null!] with root cause
java.lang.IllegalArgumentException: The given id must not be null!
at org.springframework.util.Assert.notNull(Assert.java:201) ~[spring-core-5.3.5.jar:5.3.5]
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.deleteById(SimpleJpaRepository.java:173) ~[spring-data-jpa-2.4.6.jar:2.4.6]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker$RepositoryFragmentMethodInvoker.lambda$new$0(RepositoryMethodInvoker.java:289) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:524) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:285) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:531) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:156) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:131) ~[spring-data-commons-2.4.6.jar:2.4.6]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-5.3.5.jar:5.3.5]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) ~[spring-tx-5.3.5.jar:5.3.5]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.5.jar:5.3.5]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.5.jar:5.3.5]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:174) ~[spring-data-jpa-2.4.6.jar:2.4.6]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.5.jar:5.3.5]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.5.jar:5.3.5]
at com.sun.proxy.$Proxy90.deleteById(Unknown Source) ~[na:na]
at com.ola.controller.VehicleDetailsController.deleteVehicalDetailsById(VehicleDetailsController.java:78) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.5.jar:5.3.5]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1060) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:962) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.5.jar:5.3.5]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.5.jar:5.3.5]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.44.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.5.jar:5.3.5]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.44.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.44.jar:9.0.44]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.5.jar:5.3.5]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.5.jar:5.3.5]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.5.jar:5.3.5]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.5.jar:5.3.5]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.5.jar:5.3.5]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.5.jar:5.3.5]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707) [tomcat-embed-core-9.0.44.jar:9.0.44]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.44.jar:9.0.44]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_221]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_221]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.44.jar:9.0.44]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_221]
2021-05-11 17:40:12.949 INFO 9560 --- [on(4)-127.0.0.1] inMXBeanRegistrar$SpringApplicationAdmin : Application shutdown requested.
2021-05-11 17:40:13.729 INFO 9560 --- [on(4)-127.0.0.1] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2021-05-11 17:40:13.733 INFO 9560 --- [on(4)-127.0.0.1] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2021-05-11 17:40:13.821 INFO 9560 --- [on(4)-127.0.0.1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2021-05-11 17:40:13.959 INFO 9560 --- [on(4)-127.0.0.1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
您需要在请求映射中提供一个参数
@RequestMapping(value = "/getVehicalDetailsById/{id}", method = RequestMethod.GET)
public HashMap<String, Object> getVehicleDetailsById(@PathVariable Long id) {
HashMap<String, Object> map = new HashMap<String, Object>();
Optional<VehicleDetails> data = vehdetrep.findById(id);
map.put("code", "200");
map.put("content", data);
return map;
}
@RequestMapping（value=“/getVehicalDetailsById/{id}”，method=RequestMethod.GET）
公共HashMap getVehicleDetailsById（@PathVariable Long id）{
HashMap=newHashMap（）；
可选数据=vehdetrep.findById（id）；
地图放置（“代码”，“200”）；
地图放置（“内容”，数据）；
返回图；
}
然后在请求中指定一个id，例如。http://localhost/getVehicalDetailsById/1您需要在请求映射中提供一个参数
@RequestMapping(value = "/getVehicalDetailsById/{id}", method = RequestMethod.GET)
public HashMap<String, Object> getVehicleDetailsById(@PathVariable Long id) {
HashMap<String, Object> map = new HashMap<String, Object>();
Optional<VehicleDetails> data = vehdetrep.findById(id);
map.put("code", "200");
map.put("content", data);
return map;
}
@RequestMapping（value=“/getVehicalDetailsById/{id}”，method=RequestMethod.GET）
公共HashMap getVehicleDetailsById（@PathVariable Long id）{
HashMap=newHashMap（）；
可选数据=vehdetrep.findById（id）；
地图放置（“代码”，“200”）；
地图放置（“内容”，数据）；
返回图；
}
然后在请求中指定一个id，例如。http://localhost/getVehicalDetailsById/1表车辆详细信息是否有现有数据？或者它是新生成的？它有一些现有数据表vehical_details有现有数据吗？或者它是新生成的？它有一些现有数据