我对 find（） method。
有问题。我有一个映射数据库表的'DuediligenceGestori'类。表的主要键是a number（19），因此我用以前完成的时间映射了实体
这是类
package com.xxx.model.duediligencegestori;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import com.xxx.model.AbstractVersionEntity;
import com.xxx.model.duediligence.DueDiligence;
import com.xxx.model.duediligence.DueDiligenceEnumType;
import com.xxx.model.masterData.Person;
/**
* The persistent class for the DUEDILIGENCE_GESTORI database table.
*
*/
@Entity
@Table(name = "DUEDILIGENCE_GESTORI")
public class DueDiligenceGestori extends AbstractVersionEntity implements Serializable {
private static final long serialVersionUID = 1L;
public DueDiligenceGestori() {
}
@Id
@SequenceGenerator(name = "DUEDILIGENCE_GEST_ID_SEQ_GENERATOR", sequenceName = "DDG_SEQ", allocationSize = 1)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "DUEDILIGENCE_GEST_ID_SEQ_GENERATOR")
@Column(name = "ID", unique = true, nullable = false)
private Long id;
@JoinColumn(name = "DUEDILIGENCE_ID", unique = true)
@OneToOne(cascade = CascadeType.ALL)
private DueDiligence dueDiligence;
@Column(name = "IDENTIFICATIVO_SCHEDA", unique = true, nullable = false, length = 4000)
private String identificativoScheda;
@Column(length = 25)
private String attivita;
@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "CAPO_AREA")
private Person capoArea;
@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "FUEL_S3")
private Person fuelS3;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public DueDiligence getDueDiligence() {
return dueDiligence;
}
public void setDueDiligence(DueDiligence dueDiligence) {
this.dueDiligence = dueDiligence;
}
public String getAttivita() {
return this.attivita;
}
public void setAttivita(String attivita) {
this.attivita = attivita;
}
public Person getCapoArea() {
return capoArea;
}
public void setCapoArea(Person capoArea) {
this.capoArea = capoArea;
}
public Person getFuelS3() {
return fuelS3;
}
public void setFuelS3(Person fuelS3) {
this.fuelS3 = fuelS3;
}
}
这是执行时的错误
18/12/2017 14:38:59,857 [ERROR] [com.xxx.service.BaseRestService] [] [] Rest Service response FAIL Exception {}
<openjpa-1.1.1-SNAPSHOT-r422266:965591 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: java.lang.Integer cannot be cast to java.lang.Long
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:882)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:776)
at kodo.kernel.KodoBroker.find(KodoBroker.java:232)
at org.apache.openjpa.kernel.DelegatingBroker.find(DelegatingBroker.java:183)
at org.apache.openjpa.persistence.EntityManagerImpl.find(EntityManagerImpl.java:452)
at com.xxx.business.repository.AbstractRepository.find(AbstractRepository.java:254)
at com.xxx.business.repository.AbstractRepository.find(AbstractRepository.java:250)
at com.xxx.business.repository.impl.DueDiligenceGestoriRepositoryImpl.getDueDiligenceGestori(DueDiligenceGestoriRepositoryImpl.java:83)
at com.xxx.business.service.impl.DueDiligenceGestoriServiceImpl.getDueDiligenceGestori(DueDiligenceGestoriServiceImpl.java:74)
at com.xxx.command.duediligencegestori.SaveDueDiligenceGestoriCmd.doExecute(SaveDueDiligenceGestoriCmd.java:83)
at com.xxx.command.duediligencegestori.SaveDueDiligenceGestoriCmd.doExecute(SaveDueDiligenceGestoriCmd.java:28)
at com.xxx.command.AbstractCommand.execute(AbstractCommand.java:88)
at com.xxx.service.BaseRestService.executeCommand(BaseRestService.java:58)
at com.xxx.service.DueDiligenceGestoriRestService.saveDueDiligenceGestoriDTO(DueDiligenceGestoriRestService.java:86)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.xxx.filter.EnvironmentsFilter.doHttpFilter(EnvironmentsFilter.java:133)
at com.xxx.filter.AbstractFilter.doFilter(AbstractFilter.java:43)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
at com.xxx.model.duediligencegestori.DueDiligenceGestori.pcReplaceField(DueDiligenceGestori.java)
at org.apache.openjpa.kernel.StateManagerImpl.replaceField(StateManagerImpl.java:3018)
at org.apache.openjpa.kernel.StateManagerImpl.storeObjectField(StateManagerImpl.java:2456)
at org.apache.openjpa.kernel.StateManagerImpl.storeField(StateManagerImpl.java:2552)
at org.apache.openjpa.kernel.StateManagerImpl.storeField(StateManagerImpl.java:786)
at org.apache.openjpa.kernel.StateManagerImpl.store(StateManagerImpl.java:782)
at org.apache.openjpa.jdbc.meta.strats.HandlerFieldStrategy.load(HandlerFieldStrategy.java:175)
at org.apache.openjpa.jdbc.meta.FieldMapping.load(FieldMapping.java:796)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:869)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:821)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:343)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:264)
at org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
at org.apache.openjpa.datacache.DataCacheStoreManager.initialize(DataCacheStoreManager.java:335)
at org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
at org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:901)
at kodo.kernel.KodoBroker.initialize(KodoBroker.java:65)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:859)
我试图进行调试，但一切似乎都正确了。有人知道如何采取行动吗？谢谢大家
[编辑]升级openjpa
后堆栈跟踪18/12/2017 15:39:01,519 [ERROR] [com.xxx.service.BaseRestService] [] [] Rest Service response FAIL Exception {}
<openjpa-1.1.1-SNAPSHOT-r422266:965591 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: java.lang.Integer cannot be cast to java.lang.Long
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:882)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:776)
at kodo.kernel.KodoBroker.find(KodoBroker.java:232)
at org.apache.openjpa.kernel.DelegatingBroker.find(DelegatingBroker.java:183)
at org.apache.openjpa.persistence.EntityManagerImpl.find(EntityManagerImpl.java:452)
at com.xxx.business.repository.AbstractRepository.find(AbstractRepository.java:254)
at com.xxx.business.repository.AbstractRepository.find(AbstractRepository.java:250)
at com.xxx.business.repository.impl.DueDiligenceGestoriRepositoryImpl.getDueDiligenceGestori(DueDiligenceGestoriRepositoryImpl.java:83)
at com.xxx.business.service.impl.DueDiligenceGestoriServiceImpl.getDueDiligenceGestori(DueDiligenceGestoriServiceImpl.java:74)
at com.xxx.command.duediligencegestori.SaveDueDiligenceGestoriCmd.doExecute(SaveDueDiligenceGestoriCmd.java:83)
at com.xxx.command.duediligencegestori.SaveDueDiligenceGestoriCmd.doExecute(SaveDueDiligenceGestoriCmd.java:28)
at com.xxx.command.AbstractCommand.execute(AbstractCommand.java:88)
at com.xxx.service.BaseRestService.executeCommand(BaseRestService.java:58)
at com.xxx.service.DueDiligenceGestoriRestService.saveDueDiligenceGestoriDTO(DueDiligenceGestoriRestService.java:86)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.xxx.filter.EnvironmentsFilter.doHttpFilter(EnvironmentsFilter.java:133)
at com.xxx.filter.AbstractFilter.doFilter(AbstractFilter.java:43)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
at com.xxx.model.duediligencegestori.DueDiligenceGestori.pcReplaceField(DueDiligenceGestori.java)
at org.apache.openjpa.kernel.StateManagerImpl.replaceField(StateManagerImpl.java:3018)
at org.apache.openjpa.kernel.StateManagerImpl.storeObjectField(StateManagerImpl.java:2456)
at org.apache.openjpa.kernel.StateManagerImpl.storeField(StateManagerImpl.java:2552)
at org.apache.openjpa.kernel.StateManagerImpl.storeField(StateManagerImpl.java:786)
at org.apache.openjpa.kernel.StateManagerImpl.store(StateManagerImpl.java:782)
at org.apache.openjpa.jdbc.meta.strats.HandlerFieldStrategy.load(HandlerFieldStrategy.java:175)
at org.apache.openjpa.jdbc.meta.FieldMapping.load(FieldMapping.java:796)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:869)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:821)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:343)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:264)
at org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
at org.apache.openjpa.datacache.DataCacheStoreManager.initialize(DataCacheStoreManager.java:335)
at org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
at org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:901)
at kodo.kernel.KodoBroker.initialize(KodoBroker.java:65)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:859)
... 50 more
看来，当您调用EntityManager.find接口时，您正在使用错误的类型调用它。
某个地方（我猜在 repository.impl.DueDiligenceGestoriRepositoryImpl.getDueDiligenceGestori中的堆栈）你有这样的东西：
em.find(DueDiligenceGestori.class, 12);
// or
int id; // parameter
em.find(DueDiligenceGestori.class, id);
您需要先将其转换为long。如果是常数，则12L，如果是原始的，则(long) id，如果它是整数对象，则需要null检查，然后致电id.longValue()。