自己做的一个hibernate的小程序,两个类TLendLog 和TBookMaster 还有它们的配置文件。
然后自己做了一个测试类 test1,里面只有一句话。 程序很简单,但是报 Duplicate collection role mapping错误弄得我已经郁闷两天了,麻烦高手看一下。
package book.bean;
public class TLendLog implements java.io.Serializable { private Long userMaster;
private Long bookMaster;
private String updatePerson; public String getUpdatePerson() {
return updatePerson;
} public void setUpdatePerson(String updatePerson) {
this.updatePerson = updatePerson;
}
public Long getUserMaster() {
return userMaster;
}
public void setUserMaster(Long userMaster) {
this.userMaster = userMaster;
}
public Long getBookMaster() {
return bookMaster;
} public void setBookMaster(Long bookMaster) {
this.bookMaster = bookMaster;
}}package book.bean;
import java.util.*;
public class TBookMaster implements java.io.Serializable { private Long bookId;
private String bookTitle;
private Set logs = new HashSet(0); public Long getBookId() {
return this.bookId;
} public void setBookId(Long bookId) {
this.bookId = bookId;
} public String getBookTitle() {
return this.bookTitle;
} public void setBookTitle(String bookTitle) {
this.bookTitle = bookTitle;
} public Set getLogs() {
return logs;
} public void setLogs(Set logs) {
this.logs = logs;
}}
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="book.bean.TBookMaster" table="T_BOOK_MASTER" schema="SCOTT">
<id name="bookId" type="java.lang.Long">
<column name="BOOK_ID" precision="9" scale="0" />
<generator class="assigned" />
</id>
<property name="bookTitle" type="java.lang.String">
<column name="BOOK_TITLE" length="30" not-null="true" />
</property>
<set name="logs" inverse="true">
<key>
<column name="BOOK_ID" not-null="true" />
</key>
<one-to-many class="book.bean.TLengLog" />
</set>
</class>
</hibernate-mapping>
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="book.bean.TLendLog" table="T_LEND_LOG" schema="SCOTT">
<id name="userMaster" type="java.lang.Long">
<column name="USER_ID" precision="9" scale="0" />
<generator class="assigned" />
</id>
<property name="bookMaster" type="java.lang.Long">
<column name="BOOK_ID" length="7" />
</property>
<property name="updatePerson" type="java.lang.String">
<column name="UPDATE_PERSON" length="10" />
</property>
</class>
</hibernate-mapping>
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration> <session-factory>
<property name="connection.username">scott</property>
<property name="connection.url">jdbc:oracle:thin:@localhost:1521:P6LJRN65DVAYT5BMCC9WHR</property>
<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
<property name="myeclipse.connection.profile">ltt</property>
<property name="connection.password">tiger</property>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<mapping resource="book/bean/TBookMaster.hbm.xml" />
<mapping resource="book/bean/TLendLog.hbm.xml" />
</session-factory></hibernate-configuration>package book.bean;
import org.hibernate.Session;import book.hibernate.HibernateSessionFactory;
public class test1 { public static void main(String[] args) {
Session s = HibernateSessionFactory.getSession();
}}
注我把book.bean.TBookMaster的hibernate配置文件中的<set> .....</set>去掉,
程序正常运行,我在网上有看到过对这的解释,说是类名拼错了,但是我仔细检查过了,没写错。望大家帮忙仔细看一下是那里错了
先谢过了
然后自己做了一个测试类 test1,里面只有一句话。 程序很简单,但是报 Duplicate collection role mapping错误弄得我已经郁闷两天了,麻烦高手看一下。
package book.bean;
public class TLendLog implements java.io.Serializable { private Long userMaster;
private Long bookMaster;
private String updatePerson; public String getUpdatePerson() {
return updatePerson;
} public void setUpdatePerson(String updatePerson) {
this.updatePerson = updatePerson;
}
public Long getUserMaster() {
return userMaster;
}
public void setUserMaster(Long userMaster) {
this.userMaster = userMaster;
}
public Long getBookMaster() {
return bookMaster;
} public void setBookMaster(Long bookMaster) {
this.bookMaster = bookMaster;
}}package book.bean;
import java.util.*;
public class TBookMaster implements java.io.Serializable { private Long bookId;
private String bookTitle;
private Set logs = new HashSet(0); public Long getBookId() {
return this.bookId;
} public void setBookId(Long bookId) {
this.bookId = bookId;
} public String getBookTitle() {
return this.bookTitle;
} public void setBookTitle(String bookTitle) {
this.bookTitle = bookTitle;
} public Set getLogs() {
return logs;
} public void setLogs(Set logs) {
this.logs = logs;
}}
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="book.bean.TBookMaster" table="T_BOOK_MASTER" schema="SCOTT">
<id name="bookId" type="java.lang.Long">
<column name="BOOK_ID" precision="9" scale="0" />
<generator class="assigned" />
</id>
<property name="bookTitle" type="java.lang.String">
<column name="BOOK_TITLE" length="30" not-null="true" />
</property>
<set name="logs" inverse="true">
<key>
<column name="BOOK_ID" not-null="true" />
</key>
<one-to-many class="book.bean.TLengLog" />
</set>
</class>
</hibernate-mapping>
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="book.bean.TLendLog" table="T_LEND_LOG" schema="SCOTT">
<id name="userMaster" type="java.lang.Long">
<column name="USER_ID" precision="9" scale="0" />
<generator class="assigned" />
</id>
<property name="bookMaster" type="java.lang.Long">
<column name="BOOK_ID" length="7" />
</property>
<property name="updatePerson" type="java.lang.String">
<column name="UPDATE_PERSON" length="10" />
</property>
</class>
</hibernate-mapping>
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration> <session-factory>
<property name="connection.username">scott</property>
<property name="connection.url">jdbc:oracle:thin:@localhost:1521:P6LJRN65DVAYT5BMCC9WHR</property>
<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
<property name="myeclipse.connection.profile">ltt</property>
<property name="connection.password">tiger</property>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<mapping resource="book/bean/TBookMaster.hbm.xml" />
<mapping resource="book/bean/TLendLog.hbm.xml" />
</session-factory></hibernate-configuration>package book.bean;
import org.hibernate.Session;import book.hibernate.HibernateSessionFactory;
public class test1 { public static void main(String[] args) {
Session s = HibernateSessionFactory.getSession();
}}
注我把book.bean.TBookMaster的hibernate配置文件中的<set> .....</set>去掉,
程序正常运行,我在网上有看到过对这的解释,说是类名拼错了,但是我仔细检查过了,没写错。望大家帮忙仔细看一下是那里错了
先谢过了
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lz在
<class name="book.bean.TBookMaster" table="T_BOOK_MASTER" schema="SCOTT">.....
<set name="logs" inverse="true">
<key>
<column name="BOOK_ID" not-null="true" />
</key>
<one-to-many class="book.bean.TLengLog" />
</set>
配置了一对多而没有在<class name="book.bean.TLendLog" table="T_LEND_LOG" schema="SCOTT"> ...配置多对一
配置一下看看。
你确定在数据库里BOOK_ID 是这个外键
lz在
<class name="book.bean.TBookMaster" table="T_BOOK_MASTER" schema="SCOTT">.....
<set name="logs" inverse="true">
<key>
<column name="BOOK_ID" not-null="true" />
</key>
<one-to-many class="book.bean.TLengLog" />
</set>
配置了一对多 而没有在 <class name="book.bean.TLendLog" table="T_LEND_LOG" schema="SCOTT"> ...配置多对一
配置一下看看。
---------------------------------------------------------------------
我配置再多对一后,还是报同样的错误。 而且应该可以只配单向的one-to-many
我再贴一下报错的代码org.hibernate.MappingException: Association references unmapped class: book.bean.TLengLog
at org.hibernate.cfg.HbmBinder.bindCollectionSecondPass(HbmBinder.java:2036)
at org.hibernate.cfg.HbmBinder$CollectionSecondPass.secondPass(HbmBinder.java:2497)
at org.hibernate.cfg.HbmBinder$SecondPass.doSecondPass(HbmBinder.java:2468)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:884)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:999)
at book.hibernate.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:31)
at book.bean.test1.main(test1.java:17)
%%%% Error Creating SessionFactory %%%%
org.hibernate.MappingException: Error reading resource: book/bean/TBookMaster.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:452)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1263)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1235)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1217)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1184)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1112)
at book.hibernate.HibernateSessionFactory.rebuildSessionFactory(HibernateSessionFactory.java:69)
at book.hibernate.HibernateSessionFactory.getSession(HibernateSessionFactory.java:53)
at book.bean.test1.main(test1.java:17)
Caused by: org.hibernate.MappingException: duplicate import: book.bean.TBookMaster
at org.hibernate.cfg.Mappings.addImport(Mappings.java:105)
at org.hibernate.cfg.HbmBinder.bindPersistentClassCommonValues(HbmBinder.java:541)
at org.hibernate.cfg.HbmBinder.bindClass(HbmBinder.java:488)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:234)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:152)
at org.hibernate.cfg.Configuration.add(Configuration.java:362)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:400)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:449)
... 8 more
这种写法没问题,我同事都是这样写的
你确定在数据库里BOOK_ID 是这个外键-----------------------------------------------------我数据库表中有这个字段,但是我没有把它显示的设为外键,,但这个好像没问题吧
<set name="logs" inverse="true">
<key>
<column name="BOOK_ID" not-null="true" />
</key>
<one-to-many class="book.bean.TLengLog" />
</set> 导致滴
private TBookMaster tbookMaster;
public TBookMaster getTbookMaster() {
return tbookMaster;
}public void setTbookMaster (TBookMaster tbookMaster) {
this.tbookMaster= tbookMaster;
}TLendLog.cfg.xml
<many-to-one name="logs " class="book.bean.TBookMaster" fetch="select" insert="false" update="false">
<column name="bookId" />
</many-to-one>
TBookMaster.cfg.xml
<set name="tlendLog" inverse="true" >
<key>
<column name="bookMaster" />
</key>
<one-to-many class="book.bean.TLendLog" />
</set>
2.是否向Hibernate.cfg.xml中添加映射文件