项目是集成了spring boot和spring data，然后简单的把spring data jpa和spring boot配置完成，开始进行公司项目的重构，然后出现了这个问题。当时也是找了挺多的资料，后来发现时javabean的问题。
在spring data jpa和实体类进行映射的时候，要特别注意实体类型和set、get方法名是否对应。
error starting applicationcontext. to display the conditions report re-run your application with 'debug' enabled. 2019-11-24 21:25:31.117 error 30608 --- [ restartedmain] o.s.boot.springapplication : application run failed org.springframework.beans.factory.beancreationexception: error creating bean with name 'entitymanagerfactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/hibernatejpaconfiguration.class]: invocation of init method failed; nested exception is javax.persistence.persistenceexception: [persistenceunit: default] unable to build hibernate sessionfactory; nested exception is org.hibernate.mappingexception: could not get constructor for org.hibernate.persister.entity.singletableentitypersister at org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializebean(abstractautowirecapablebeanfactory.java:1803) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.docreatebean(abstractautowirecapablebeanfactory.java:595) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.createbean(abstractautowirecapablebeanfactory.java:517) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractbeanfactory.lambda$dogetbean$0(abstractbeanfactory.java:323) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.defaultsingletonbeanregistry.getsingleton(defaultsingletonbeanregistry.java:222) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractbeanfactory.dogetbean(abstractbeanfactory.java:321) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractbeanfactory.getbean(abstractbeanfactory.java:202) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.context.support.abstractapplicationcontext.getbean(abstractapplicationcontext.java:1108) ~[spring-context-5.2.1.release.jar:5.2.1.release] at org.springframework.context.support.abstractapplicationcontext.finishbeanfactoryinitialization(abstractapplicationcontext.java:868) ~[spring-context-5.2.1.release.jar:5.2.1.release] at org.springframework.context.support.abstractapplicationcontext.refresh(abstractapplicationcontext.java:550) ~[spring-context-5.2.1.release.jar:5.2.1.release] at org.springframework.boot.springapplication.refresh(springapplication.java:747) ~[spring-boot-2.2.1.release.jar:2.2.1.release] at org.springframework.boot.springapplication.refreshcontext(springapplication.java:397) ~[spring-boot-2.2.1.release.jar:2.2.1.release] at org.springframework.boot.springapplication.run(springapplication.java:315) ~[spring-boot-2.2.1.release.jar:2.2.1.release] at org.springframework.boot.springapplication.run(springapplication.java:1226) ~[spring-boot-2.2.1.release.jar:2.2.1.release] at org.springframework.boot.springapplication.run(springapplication.java:1215) ~[spring-boot-2.2.1.release.jar:2.2.1.release] at com.silverbullet.ydserver2.ydserver2.ydserver2application.main(ydserver2application.java:20) ~[classes/:na] at java.base/jdk.internal.reflect.nativemethodaccessorimpl.invoke0(native method) ~[na:na] at java.base/jdk.internal.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) ~[na:na] at java.base/java.lang.reflect.method.invoke(method.java:566) ~[na:na] at org.springframework.boot.devtools.restart.restartlauncher.run(restartlauncher.java:49) ~[spring-boot-devtools-2.2.1.release.jar:2.2.1.release] caused by: javax.persistence.persistenceexception: [persistenceunit: default] unable to build hibernate sessionfactory; nested exception is org.hibernate.mappingexception: could not get constructor for org.hibernate.persister.entity.singletableentitypersister at org.springframework.orm.jpa.abstractentitymanagerfactorybean.buildnativeentitymanagerfactory(abstractentitymanagerfactorybean.java:403) ~[spring-orm-5.2.1.release.jar:5.2.1.release] at org.springframework.orm.jpa.abstractentitymanagerfactorybean.afterpropertiesset(abstractentitymanagerfactorybean.java:378) ~[spring-orm-5.2.1.release.jar:5.2.1.release] at org.springframework.orm.jpa.localcontainerentitymanagerfactorybean.afterpropertiesset(localcontainerentitymanagerfactorybean.java:341) ~[spring-orm-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.invokeinitmethods(abstractautowirecapablebeanfactory.java:1862) ~[spring-beans-5.2.1.release.jar:5.2.1.release] at org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializebean(abstractautowirecapablebeanfactory.java:1799) ~[spring-beans-5.2.1.release.jar:5.2.1.release] ... 20 common frames omitted caused by: org.hibernate.mappingexception: could not get constructor for org.hibernate.persister.entity.singletableentitypersister at org.hibernate.persister.internal.persisterfactoryimpl.createentitypersister(persisterfactoryimpl.java:123) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.persister.internal.persisterfactoryimpl.createentitypersister(persisterfactoryimpl.java:77) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.metamodel.internal.metamodelimpl.initialize(metamodelimpl.java:181) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.internal.sessionfactoryimpl.<init>(sessionfactoryimpl.java:305) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.boot.internal.sessionfactorybuilderimpl.build(sessionfactorybuilderimpl.java:462) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.jpa.boot.internal.entitymanagerfactorybuilderimpl.build(entitymanagerfactorybuilderimpl.java:1249) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.springframework.orm.jpa.vendor.springhibernatejpapersistenceprovider.createcontainerentitymanagerfactory(springhibernatejpapersistenceprovider.java:58) ~[spring-orm-5.2.1.release.jar:5.2.1.release] at org.springframework.orm.jpa.localcontainerentitymanagerfactorybean.createnativeentitymanagerfactory(localcontainerentitymanagerfactorybean.java:365) ~[spring-orm-5.2.1.release.jar:5.2.1.release] at org.springframework.orm.jpa.abstractentitymanagerfactorybean.buildnativeentitymanagerfactory(abstractentitymanagerfactorybean.java:391) ~[spring-orm-5.2.1.release.jar:5.2.1.release] ... 24 common frames omitted caused by: org.hibernate.propertyaccessexception: exception occurred inside getter of com.silverbullet.ydserver2.ydserver2.model.packsortinglog.id at org.hibernate.property.access.spi.gettermethodimpl.get(gettermethodimpl.java:45) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.engine.internal.unsavedvaluefactory.getunsavedidentifiervalue(unsavedvaluefactory.java:68) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.tuple.propertyfactory.buildidentifierattribute(propertyfactory.java:62) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.tuple.entity.entitymetamodel.<init>(entitymetamodel.java:136) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.persister.entity.abstractentitypersister.<init>(abstractentitypersister.java:571) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at org.hibernate.persister.entity.singletableentitypersister.<init>(singletableentitypersister.java:124) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] at java.base/jdk.internal.reflect.nativeconstructoraccessorimpl.newinstance0(native method) ~[na:na] at java.base/jdk.internal.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:45) ~[na:na] at java.base/java.lang.reflect.constructor.newinstance(constructor.java:490) ~[na:na] at org.hibernate.persister.internal.persisterfactoryimpl.createentitypersister(persisterfactoryimpl.java:96) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] ... 32 common frames omitted caused by: java.lang.reflect.invocationtargetexception: null at java.base/jdk.internal.reflect.nativemethodaccessorimpl.invoke0(native method) ~[na:na] at java.base/jdk.internal.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) ~[na:na] at java.base/java.lang.reflect.method.invoke(method.java:566) ~[na:na] at org.hibernate.property.access.spi.gettermethodimpl.get(gettermethodimpl.java:42) ~[hibernate-core-5.4.8.final.jar:5.4.8.final] ... 42 common frames omitted caused by: java.lang.nullpointerexception: null at com.silverbullet.ydserver2.ydserver2.model.packsortinglog.getid(packsortinglog.java:26) ~[classes/:na] ... 47 common frames omitted process finished with exit code 0
字段id设置的是包装类型long，但是我在get上面注入返回的是基本类型long，所以注入失败。
将基本数据类型long改成long就可以。
注：也有的是可能get和set方法名有问题。可以检查一下。
文章为arvinhan原创,如果文章有错的地方欢迎指正，大家互相交流。
