引言： 在基于SpringData/JPA来快速开发若干功能过程中，，碰到了table is not Mapped问题，经过一番辛苦的调试测试之后，才发现了一个@Entity的属性name的妙用。
1. 问题的提出
场景描述： 在开发中，做几个功能类似的模块，但代码需要独立，方便后续的独立部署。故出现了很多包路径不同，但是类的名称类似的类。在Model中定义了很多名称相同的实体类，都是以@Entity来定义的。
@Entity@Table(name="table1")public class Model1 { ……..} 在项目加载过程中，出席那了以下错误信息：
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [META-INF/spring-hibernate.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: myPersistenceUnit] Unable to build EntityManagerFactoryat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1513)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191)at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1117)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:922)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410)at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)at org.apache.catalina.startup.Embedded.start(Embedded.java:825)at org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:558)at org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:255)at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)at org.apache.maven.cli.MavenCli.execute(MavenCli.java:582)at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)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 org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)Caused by: javax.persistence.PersistenceException: [PersistenceUnit: myPersistenceUnit] Unable to build EntityManagerFactoryat org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:924)at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:899)at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:76)at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:290)at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:310)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1572)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1510)… 42 moreCaused by: org.hibernate.AnnotationException: Use of the same entity name twice: OrderEntityat org.hibernate.cfg.annotations.EntityBinder.bindEntity(EntityBinder.java:403)at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:602)at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3568)at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3522)at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1379)at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1784)at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:96)at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914)… 48 moreCaused by: org.hibernate.DuplicateMappingException: duplicate import: OrderEntity refers to both com.creditease.bsettle.pay.model.OrderEntity and com.creditease.bsettle.expense.model.OrderEntity (try using auto-import="false")at org.hibernate.cfg.Configuration$MappingsImpl.addImport(Configuration.java:2674)at org.hibernate.cfg.annotations.EntityBinder.bindEntity(EntityBinder.java:396)… 55 more
2. 问题分析
没有口水与汗水，就没有成功的泪水。
