本文介绍了Groovy:Lombok @NoArgsConstructor未创建默认构造函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在我的春季启动项目中使用了 lombok 1.18.6 ，并且我有 @NoArgsConstructor ，但仍然收到 org.springframework.orm.jpa.JpaSystemException:没有实体的默认构造函数:com.validation.entity.Client;嵌套的异常是org.hibernate.InstantiationException:实体的默认构造函数:com.validation.entity.Client]的根本原因是
I am using lombok 1.18.6 in my spring boot project and I have @NoArgsConstructor but still am getting org.springframework.orm.jpa.JpaSystemException: No default constructor for entity: : com.validation.entity.Client; nested exception is org.hibernate.InstantiationException: No default constructor for entity: : com.validation.entity.Client] with root cause
下面是我的 Client 实体
import lombok.AccessLevel
import lombok.Data
import lombok.NoArgsConstructor
import org.hibernate.annotations.Fetch
import org.hibernate.annotations.FetchMode
import org.hibernate.annotations.Nationalized
import javax.persistence.CascadeType
import javax.persistence.Column
import javax.persistence.Entity
import javax.persistence.GeneratedValue
import javax.persistence.GenerationType
import javax.persistence.Id
import javax.persistence.OneToMany
@Data
@NoArgsConstructor(access = AccessLevel.PUBLIC)
@Entity
class Client implements Serializable {
private static final long serialVersionUID = 1L
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id
@Nationalized
@Column(unique = true, nullable = false)
private String name
@Column(nullable = false)
private boolean active
@Nationalized
@Column(unique = true, nullable = false)
private String externalId
@Fetch(value = FetchMode.SELECT)
@OneToMany(mappedBy="client", cascade=CascadeType.ALL, targetEntity = RuleSet.class)
private Set<RuleSet> ruleSets
Client(String name, boolean active, String externalId){
this.name = name
this.active = active
this.externalId = externalId
}
}
下面是我的 ClientRepository
import com.validation.entity.Client
import com.validation.entity.RuleDefinition
import org.springframework.data.repository.CrudRepository
import org.springframework.data.repository.PagingAndSortingRepository
import org.springframework.data.repository.query.Param
interface ClientRepository extends PagingAndSortingRepository<Client, Long> {
Client findByName(@Param("name")String name)
Client findByNameIgnoreCase(@Param("name")String name)
Client findByExternalId(@Param("lawId")String id)
Client findByExternalIdIgnoreCase(@Param("lawId")String id)
Client findByRuleSetsId(Long id)
Set<Client> findByNameIgnoreCaseOrExternalIdIgnoreCase(@Param("name")String name,@Param("lawId")String id)
Set<Client> findByNameContainingIgnoreCase(@Param("name")String name)
}
有人可以帮助我为什么我得到 没有实体的默认构造函数 即使使用 @NoArgsConstructor(access = AccessLevel.PUBLIC)
Can someone please help me why am I getting No default constructor for entity even with @NoArgsConstructor(access = AccessLevel.PUBLIC)
下面是当我发出请求 https://localhost:9443/api/clients
2019-03-22 11:46:44 - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: No default constructor for entity: : com.validation.entity.Client; nested exception is org.hibernate.InstantiationException: No default constructor for entity: : com.validation.entity.Client] with root cause
org.hibernate.InstantiationException: No default constructor for entity: : com.validation.entity.Client
at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:85)
at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:105)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.instantiate(AbstractEntityTuplizer.java:673)
at org.hibernate.persister.entity.AbstractEntityPersister.instantiate(AbstractEntityPersister.java:4946)
at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1682)
at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1666)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1663)
at org.hibernate.loader.Loader.getRow(Loader.java:1561)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:731)
at org.hibernate.loader.Loader.processResultSet(Loader.java:990)
at org.hibernate.loader.Loader.doQuery(Loader.java:948)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340)
at org.hibernate.loader.Loader.doList(Loader.java:2689)
at org.hibernate.loader.Loader.doList(Loader.java:2672)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506)
at org.hibernate.loader.Loader.list(Loader.java:2501)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:504)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1508)
at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1537)
at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505)
at org.hibernate.query.Query.getResultList(Query.java:135)
at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getResultList(CriteriaQueryTypeQueryAdapter.java:74)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.readPage(SimpleJpaRepository.java:569)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:388)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:356)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359)
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:644)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:608)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:135)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
at com.sun.proxy.$Proxy134.findAll(Unknown Source)
at org.springframework.data.repository.support.PagingAndSortingRepositoryInvoker.invokeFindAll(PagingAndSortingRepositoryInvoker.java:74)
at org.springframework.data.rest.core.support.UnwrappingRepositoryInvokerFactory$UnwrappingRepositoryInvoker.invokeFindAll(UnwrappingRepositoryInvokerFactory.java:158)
at org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResource(RepositoryEntityController.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:117)
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
下面是反编译的 Client 类
import groovy.lang.GroovyObject;
import groovy.lang.MetaClass;
import java.io.Serializable;
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import org.codehaus.groovy.runtime.callsite.CallSite;
import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
import org.codehaus.groovy.runtime.typehandling.ShortTypeHandling;
import org.hibernate.annotations.Fetch;
import org.hibernate.annotations.FetchMode;
import org.hibernate.annotations.Nationalized;
@Entity
public class Client
implements Serializable, GroovyObject
{
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
@Nationalized
@Column(nullable=false, unique=true)
private String name;
@Column(nullable=false)
private boolean active;
@Nationalized
@Column(nullable=false, unique=true)
private String externalId;
@Fetch(FetchMode.SELECT)
@OneToMany(targetEntity=RuleSet.class, mappedBy="client", cascade={javax.persistence.CascadeType.ALL})
private Set<RuleSet> ruleSets;
public Client(String name, boolean active, String externalId)
{
MetaClass localMetaClass = $getStaticMetaClass();this.metaClass = localMetaClass;String str1 = name;this.name = ((String)ShortTypeHandling.castToString(str1));
boolean bool = active;this.active = DefaultTypeTransformation.booleanUnbox(Boolean.valueOf(bool));
String str2 = externalId;this.externalId = ((String)ShortTypeHandling.castToString(str2));
}
}
推荐答案
基于反编译的输出，您正在使用Groovy，而不是Java. Lombok在Groovy上不能很好地工作.您的反编译代码显示了这一点，没有Lombok增强，例如吸气剂不是由 @Data 创建的.
Based on your de-compiled output you are using Groovy, not Java. Lombok doesn't work well with Groovy. Your decompiled code shows this, there are no Lombok augmentations e.g. getters are not created by @Data.
如果您打算继续将Lombok与Groovy混合使用，则需要重新访问项目设置.我个人不会将这两件事混在一起.
If you plan to continue mixing Lombok with Groovy you need to revisit your project setup. Personally I'd not mix these two things.
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