Question

org.hibernate.DuplicateMappingException: Duplicate class/entity mapping

严重: Servlet.service() for servlet Servletcontroller threw exception
org.hibernate.DuplicateMappingException: Duplicate class/entity mapping com.hxm.po.Address
at org.hibernate.cfg.Configuration$MappingsImpl.addClass(Configuration.java:3189)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:176)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4003)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXmlQueue(Configuration.java:3995)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3983)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1436)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1894)
at com.hxm.util.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:10)
at com.hxm.dao.impl.AddressDaoImpl.saveAddress(AddressDaoImpl.java:16)
at com.hxm.controller.Servletcontroller.doGet(Servletcontroller.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
应该没有吧？

Answer 1

你这个错误是由于你在hibernate的映射文件中添加了两次对com.hxm.po.Address对象的映射。你检查一下hibernate.cfg.xml中是不是有两个这个类的映射文件。

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