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Java List를 사용하여 최대 다수의 예제를 최대 절전 모드로 만들려고합니다. 내 코드는 다음과 같습니다. 몇 가지 오류가 있습니다.최대 절전 모드 Java List를 사용하여 다 대다 양방향 매핑
public class Student implements java.io.Serializable
{
private long studentId;
private String studentName;
private List<Course> courses = new LinkedList<Course>();
//other getters and setters
}
코스 : 누군가가 나에게이 문제를 해결하는 데 도움이 될 수 있다면, 그것은 물론 많은 학생들이 취할 수 큰
학생이 많은 코스를 를 취할 수
Student ---->STUDENT_COURSE<-----Course
학생 클래스 것 종류 :
public class Course implements java.io.Serializable {
private long courseId;
private String courseName;
private List <Student> Stu = new LinkedList <Student>();
//other getters and setters
}
코스 매핑 파일 :
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 14, 2010 7:14:32 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
<class name="com.BiddingSystem.domain.Course" table="COURSE">
<id name="courseId" type="long">
<column name="COURSEID" />
<generator class="native" />
</id>
<property name="courseName" type="java.lang.String">
<column name="COURSENAME" />
</property>
<list name="Stu" table="STUDENT_COURSE">
<key>
<column name="COURSEID" />
</key>
<many-to-many column="STUDENTID" class="com.BiddingSystem.domain.Student" />
</list>
</class>
</hibernate-mapping>
학생 매핑 파일 :
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 14, 2010 7:14:32 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
<class name="com.BiddingSystem.domain.Student" table="STUDENT">
<id name="studentId" type="long">
<column name="STUDENTID" />
<generator class="native" />
</id>
<property name="studentName" type="java.lang.String">
<column name="STUDENTNAME" />
</property>
<list name="courses" table="STUDENT_COURSE">
<key>
<column name="STUDENTID" />
</key>
<many-to-many column="COURSEID" class="com.BiddingSystem.domain.Course" />
</list>
</class>
</hibernate-mapping>
오류 :
Initial SessionFactory creation failed.org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/BiddingSystem/domain/Student.hbm.xml
[WARN] /biddingsystem/greet
java.lang.ExceptionInInitializerError
at com.BiddingSystem.server.HibernateUtil.<clinit>(HibernateUtil.java:16)
at com.BiddingSystem.server.GreetingServiceImpl.<init>(GreetingServiceImpl.java:33)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:463)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/BiddingSystem/domain/Student.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:671)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1679)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1647)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1626)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1600)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
at com.BiddingSystem.server.HibernateUtil.<clinit>(HibernateUtil.java:12)
... 26 more
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from invalid mapping
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:604)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:668)
... 33 more
Caused by: org.xml.sax.SAXParseException: The content of element type "list" must match "(meta*,subselect?,cache?,synchronize*,comment?,key,(index|list-index),(element|one-to-many|many-to-many|composite-element|many-to-any),loader?,sql-insert?,sql-update?,sql-delete?,sql-delete-all?,filter*)".
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2017)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:901)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2938)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at org.dom4j.io.SAXReader.read(SAXReader.java:465)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:601)
... 34 more
[WARN] Nested in java.lang.ExceptionInInitializerError:
org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/BiddingSystem/domain/Student.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:671)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1679)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1647)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1626)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1600)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
at com.BiddingSystem.server.HibernateUtil.<clinit>(HibernateUtil.java:12)
at com.BiddingSystem.server.GreetingServiceImpl.<init>(GreetingServiceImpl.java:33)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:463)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from invalid mapping
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:604)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:668)
... 33 more
Caused by: org.xml.sax.SAXParseException: The content of element type "list" must match "(meta*,subselect?,cache?,synchronize*,comment?,key,(index|list-index),(element|one-to-many|many-to-many|composite-element|many-to-any),loader?,sql-insert?,sql-update?,sql-delete?,sql-delete-all?,filter*)".
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2017)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:901)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2938)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at org.dom4j.io.SAXReader.read(SAXReader.java:465)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:601)
문제는 자바 목록이 필요한 위젯을 사용하고 있다는 것입니다. 나는이 목록을 작동시킬 필요가있다 !! – Noor
일대 다, 많음, 많음, 많은 수의 최대 절전 모드로 목록 작업을 할 수 있습니까? – Noor
예를 들어 ArrayList에 복사하여 집합을 쉽게 목록으로 변환 할 수 있습니다. 목록을 원하는 순서와 데이터베이스에서 지정하는지 또는 정렬 결과 만 고려해야합니다. – araqnid