使用 Spring & JPA，获取 java.lang.IllegalArgumentException: Unknown entity
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【中文标题】使用 Spring & JPA，获取 java.lang.IllegalArgumentException: Unknown entity【英文标题】：Using Spring & JPA, getting java.lang.IllegalArgumentException: Unknown entity 【发布时间】：2017-05-10 11:17:33 【问题描述】：所以我一直在尝试让这个应用程序使用 Spring 4、Spring Boot 1.4 和 Hibernate 5 工作（通过检查 Maven 中的 maven 依赖项进行验证，但无论出于何种原因，它都不会确认我的查看位置设置对于特定包中的实体类，而不是在一个完全不同的包中查找，我找不到它的指定位置。使用 javax.persistence pacakge 代替 org.hibernate 等步骤没有结果。也使用 SessionFactory 代替 EntityManager产生了同样的错误。没有使用persistence.xml（或者实际上任何xml，就像使用Spring 3一样，我想要一个完全基于Java的配置，从研究来看这应该是可能的？
事不宜迟，这是当前代码。
POM 文件：
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring.boot.version>1.4.2.RELEASE</spring.boot.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<!-- Import dependency management from Spring Boot -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>$spring.boot.version</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-file</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!-- Other -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.4.5</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.40</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
实体类：
@Entity
@Table(name = "inventory")
public class InventoryDBModel implements Serializable
private static final long serialVersionUID = 1L;
@Id
@Column(name = "product_id")
private int productID;
@Id
@Column(name = "store_id")
private int storeID;
@Column(name = "quantity")
private int quantity;
@Column(name = "reported_on")
private String reportedOn; //Convert to Date
@Column(name = "updated_at")
private String updatedAt; //Convert to Date
public int getProductID()
return productID;
public int getStoreID()
return storeID;
public int getQuantity()
return quantity;
public String getReportedOn()
return reportedOn;
public String getUpdatedAt()
return updatedAt;
public void setProductID(final int productID)
this.productID = productID;
public void setStoreID(final int storeID)
this.storeID = storeID;
public void setQuantity(final int quantity)
this.quantity = quantity;
public void setReportedOn(final String reportedOn)
this.reportedOn = reportedOn;
public void setUpdatedAt(final String updatedAt)
this.updatedAt = updatedAt;
DAO 接口：
public interface InventoryDAO
public void createOne(LCBOInventory lcboInventory);
public void createMany(List<? extends LCBOInventory> lcboInventorysItems);
public void delete(int productID, int styleID);
public List<LCBOInventory> getByProduct(int productID);
public LCBOInventory getByProductAndStore(int productID, int storeID);
public List<LCBOInventory> getByStore(int storeID);
public List<LCBOInventory> list();
public void updateOne(LCBOInventory lcboInventory);
public void updateMany(List<LCBOInventory> lcboInventoryItems);
DAO 实现类：
public class InventoryDAOImpl implements InventoryDAO
static final String SELECT_INVENTORY = "SELECT i FROM inventory ";
static final String PRODUCTID = "productID";
static final String STOREID = "storeID";
@Autowired
private EntityManager em;
public InventoryDAOImpl()
//basic constructor
public InventoryDAOImpl(final EntityManager em)
this.em = em;
@Override
@Transactional
public void createOne(final LCBOInventory newLCBOInventoryItem)
LCBOInventory lcboInventoryObject = new LCBOInventory();
lcboInventoryObject.setProductID(newLCBOInventoryItem.getProductID());
lcboInventoryObject.setQuantity(newLCBOInventoryItem.getQuantity());
lcboInventoryObject.setReportedOn(newLCBOInventoryItem.getReportedOn());
lcboInventoryObject.setStoreID(newLCBOInventoryItem.getStoreID());
lcboInventoryObject.setUpdatedAt(newLCBOInventoryItem.getUpdatedAt());
em.persist(lcboInventoryObject);
@Override
@Transactional
public void createMany(final List<? extends LCBOInventory> lcboInventorysItems)
lcboInventorysItems.stream().forEach((currentInventoryItem) ->
LCBOInventory lcboInventoryObject = new LCBOInventory();
lcboInventoryObject.setProductID(currentInventoryItem.getProductID());
lcboInventoryObject.setQuantity(currentInventoryItem.getQuantity());
lcboInventoryObject.setReportedOn(currentInventoryItem.getReportedOn());
lcboInventoryObject.setStoreID(currentInventoryItem.getStoreID());
lcboInventoryObject.setUpdatedAt(currentInventoryItem.getUpdatedAt());
em.persist(lcboInventoryObject);
);
@Override
public void delete(final int productID, final int styleID)
Query loadSpecificProductStoreCombo = em.createQuery("DELETE i FROM inventory i WHERE i.productID = :productID AND i.storeID = :storeID");
loadSpecificProductStoreCombo.setParameter("productID", productID);
loadSpecificProductStoreCombo.setParameter("storeID", styleID);
loadSpecificProductStoreCombo.executeUpdate();
@Override
public List<LCBOInventory> getByProduct(final int productID)
TypedQuery<LCBOInventory> loadInventoryByProduct = em.createQuery(SELECT_INVENTORY + "WHERE i.productID = :productID " +
"AND i.storeID = :storeID", LCBOInventory.class);
loadInventoryByProduct.setParameter("productID", productID);
return loadInventoryByProduct.getResultList();
@Override
public LCBOInventory getByProductAndStore(final int productID, final int storeID)
TypedQuery<LCBOInventory> loadSpecificProductStoreCombo = em.createQuery(SELECT_INVENTORY + "WHERE i.productID = :productID " +
"AND i.storeID = :storeID", LCBOInventory.class);
loadSpecificProductStoreCombo.setParameter("productID", productID);
loadSpecificProductStoreCombo.setParameter("storeID", storeID);
return loadSpecificProductStoreCombo.getSingleResult();
@Override
public List<LCBOInventory> getByStore(final int storeID)
TypedQuery<LCBOInventory> loadInventoryByStore = em.createQuery(SELECT_INVENTORY + "WHERE i.productID = :productID " +
"AND i.storeID = :storeID", LCBOInventory.class);
loadInventoryByStore.setParameter("storeID", storeID);
return loadInventoryByStore.getResultList();
@Override
public List<LCBOInventory> list()
return em.createQuery("SELECT i FROM product i", LCBOInventory.class).getResultList();
@Override
@Transactional
public void updateOne(final LCBOInventory newLCBOInventoryItem)
TypedQuery<LCBOInventory> loadSpecificProductStoreCombo = em.createQuery(SELECT_INVENTORY + "WHERE i.productID = :productID " +
"AND i.storeID = :storeID", LCBOInventory.class);
loadSpecificProductStoreCombo.setParameter("productID", newLCBOInventoryItem.getProductID());
loadSpecificProductStoreCombo.setParameter("storeID", newLCBOInventoryItem.getStoreID());
LCBOInventory oldLCBOInventoryItem = loadSpecificProductStoreCombo.getSingleResult();
oldLCBOInventoryItem.setProductID(newLCBOInventoryItem.getProductID());
oldLCBOInventoryItem.setQuantity(newLCBOInventoryItem.getQuantity());
oldLCBOInventoryItem.setReportedOn(newLCBOInventoryItem.getReportedOn());
oldLCBOInventoryItem.setStoreID(newLCBOInventoryItem.getStoreID());
oldLCBOInventoryItem.setUpdatedAt(newLCBOInventoryItem.getUpdatedAt());
@Override
public void updateMany(List<LCBOInventory> lcboInventoryItems)
// TODO Auto-generated method stub
数据库配置类：
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages="com.sample.hibernate.model")
public class DatabaseConfig
@Autowired
private LCBOInventoryTrackerProperties properties;
@Bean(name = "entityManager")
public EntityManagerFactory entityManagerFactory() throws SQLException
final LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
factoryBean.setDataSource(dataSource());
factoryBean.setJpaDialect(new HibernateJpaDialect());
factoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
factoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
factoryBean.setPersistenceUnitName("persistenceUnit");
factoryBean.setJpaProperties(getHibernateProperties());
factoryBean.setPackagesToScan(new String[]"com.sample.hibernate.model");
factoryBean.afterPropertiesSet();
return factoryBean.getObject();
@Bean
public DataSource dataSource() throws SQLException
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(properties.getDb().getDriver());
dataSource.setUrl(properties.getDb().getUrl());
dataSource.setUsername(properties.getDb().getUsername());
dataSource.setPassword(properties.getDb().getPassword());
return dataSource;
private Properties getHibernateProperties()
Properties hibernateConfigProperties = new Properties();
hibernateConfigProperties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5InnoDBDialect");
hibernateConfigProperties.put("hibernate.show_sql", true);
hibernateConfigProperties.put("hibernate.generate_statistics", true);
hibernateConfigProperties.put("hibernate.hbm2ddl.auto", "update");
hibernateConfigProperties.put("hibernate.use_sql_comments", true);
return hibernateConfigProperties;
@Bean
public PlatformTransactionManager transactionManager() throws SQLException
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(this.entityManagerFactory());
return transactionManager;
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation()
return new PersistenceExceptionTranslationPostProcessor();
//DAO Autowires
@Autowired
@Bean(name = "inventoryDAO")
public InventoryDAO getInventoryDAO(final EntityManager entityManager)
return new InventoryDAOImpl(entityManager);
最后但并非最不重要的是堆栈跟踪。
java.lang.IllegalArgumentException: Unknown entity: com.sample.lcbo.domain.LCBOInventory
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1149) ~[hibernate-entitymanager-5.0.11.Final.jar:5.0.11.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_92]
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:347) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.sun.proxy.$Proxy60.persist(Unknown Source) ~[na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_92]
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.sun.proxy.$Proxy60.persist(Unknown Source) ~[na:na]
at com.sample.lcbo.dao.InventoryDAOImpl.lambda$0(InventoryDAOImpl.java:56) ~[classes/:na]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(Unknown Source) ~[na:1.8.0_92]
at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source) ~[na:1.8.0_92]
at com.sample.lcbo.dao.InventoryDAOImpl.createMany(InventoryDAOImpl.java:47) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_92]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.sun.proxy.$Proxy62.createMany(Unknown Source) ~[na:na]
at com.sample.lcbo.writer.LCBOInventoryWriter.write(LCBOInventoryWriter.java:20) ~[classes/:na]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.writeItems(SimpleChunkProcessor.java:175) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.doWrite(SimpleChunkProcessor.java:151) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.write(SimpleChunkProcessor.java:274) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.item.SimpleChunkProcessor.process(SimpleChunkProcessor.java:199) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:75) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:81) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374) ~[spring-batch-infrastructure-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) ~[spring-batch-infrastructure-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144) ~[spring-batch-infrastructure-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:200) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:392) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.job.SimpleJob.doExecute(SimpleJob.java:135) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:306) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50) [spring-core-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_92]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_92]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) [spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) [spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.sun.proxy.$Proxy65.run(Unknown Source) [na:na]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.execute(JobLauncherCommandLineRunner.java:216) [spring-boot-autoconfigure-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.executeLocalJobs(JobLauncherCommandLineRunner.java:233) [spring-boot-autoconfigure-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.launchJobFromProperties(JobLauncherCommandLineRunner.java:125) [spring-boot-autoconfigure-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.run(JobLauncherCommandLineRunner.java:119) [spring-boot-autoconfigure-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:784) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:771) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
at com.sample.lcbo.config.LCBOBatchConfig.main(LCBOBatchConfig.java:69) [classes/:na]
对此有任何帮助，我将不胜感激。虽然我尽了最大的努力，但如果有任何问题，请尽管提出，我会尽力提供。
【问题讨论】：
看起来你已经混合了一些来自 hibernate + spring 项目的配置和一些来自 spring 数据项目的配置。请仔细阅读这个tutorial，不要实现DAO层。您还可以发布整个堆栈跟踪并指出您实际想要实现的目标......？ @AntJavaDev 哦，我并不感到惊讶，它看起来像是各种物品的集合，被挤成一块拼凑的被子。试图找到一个高质量的教程并不容易，所以不得不从各种来源中获取片段。我将再试一次该教程，并包含一个堆栈跟踪以供审查。至于实现什么，只要能够使用hibernate和Spring Batch进行数据库操作即可。这就是这个项目开始的一般要点。 您问题中的实体类名为InventoryDBModel，而您尝试持久化的类型名为LCBOInventory。您确定您发布了正确的代码吗？您能否查看代码（或您的应用程序）并发布正确的代码（或更正您的应用程序）？
首先，您发布的实体InventoryDBModel 没有在您的代码中引用。其次 。从您的堆栈跟踪中，很明显 Unknown entity : com.sample.lcbo.domain.LCBOInventory ，因为您将这个包传递给您的 entityManager 以扫描 com.sample.hibernate.model ... ?
所以发现原因似乎是多个教程的实施不佳。完全重构代码以使用直接 Spring JPA 并且没有任何旧代码看起来已经解决了这个问题。对于学习新技术带来的困惑和乐趣，我们深表歉意。
【参考方案1】：
重要的是，persistence.xml 免费方法从 Spring 3.1 开始就可以使用。请参阅文档here。
另外，您应该知道 Spring Boot 1.4 需要 Spring Framework 4.3。请参阅其中的release notes。
你看到官方 Spring 指南Accessing Data with JPA了吗？
更新 #1
您正在尝试使用实体 com.sample.lcbo.domain.LCBOInventory（请参阅异常详细信息），但您将 com.sample.hibernate.model 设置为 EntityManagerFactoryBean.setPackagesToScan 方法。
【讨论】：
感谢您的回复。我已验证该应用程序在 Eclipse 的 Maven 依赖项下将 Spring core 4.3.4、Spring boot 1.4.2 和 Hibernite 5.0.11 列为 jar。我还检查了链接的 Spring Guides。看起来我没有遗漏任何值得注意的内容，或者至少没有遗漏任何会导致此错误发生的内容。 感谢您的回复。它所指的项目也不是域，而只是定义库存对象的类。实体类位于“com.sample.hibernate.model”中，但无论出于何种原因，程序都希望转到 com.sample.lcbo.domain，但在任何地方都没有指明它可以扫描。因此混乱 没有混淆，因为您将 EntityManager 的“持久”和“选择查询”与 LCBOInventory 类一起使用，这就是 Hibernate 将此类视为实体类的原因。应该在 DAO 中使用 InventoryDBModel 而不是 LCBOInventory。 有趣。我认为 Entity 注释和 setPackages 将是它的确定方式。以上是关于使用 Spring & JPA，获取 java.lang.IllegalArgumentException: Unknown entity的主要内容，如果未能解决你的问题，请参考以下文章
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