我有以下代码，
try {
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
//Get Session
Session session = sessionFactory.getCurrentSession();
//start transaction
session.beginTransaction();
Department dept = DepartmentDAO.findDepartmentById(sessionFactory, 115); // Administration
Country cntr = CountryDAO.findCountryById(sessionFactory, new Short((short)102)); // UK
City ct = CityDAO.findCityById(sessionFactory, new Short((short)312)); // London
Address address = AddressDAO.findAddressById(sessionFactory, new Short((short)517)); // Street of London
System.out.println("Department: " + dept.getDepartmentName());
System.out.println("Country: " + cntr.getCountry());
System.out.println("City: " + ct.getCity());
System.out.println("Address: " + address.getAddress());
Users user = new Users();
user.setUsername("alan");
user.setPassword(LoginConverter.hash256("alan"));
user.setRoles(Roles.ADMINISTRATOR);
Employees emp = new Employees();
emp.setName("Alan");
emp.setJobRole("CEO");
emp.setInsertTime(new Date());
emp.setDepartment(dept);
emp.setAddress(address);
emp.setUser(user);
user.setEmployee(emp);
session.save(emp);
session.save(user);
//Commit transaction
session.getTransaction().commit();
System.out.println("************* OK *************");
System.out.println("************* OK *************");
System.out.println("************* OK *************");
System.out.println("************* OK *************");
} catch(HibernateException | NoSuchAlgorithmException | UnsupportedEncodingException t) {
System.out.println("************* KO *************");
System.out.println("************* KO *************");
System.out.println("************* KO *************");
System.out.println("************* KO *************");
} finally {
//terminate session factory, otherwise program won't end
HibernateUtil.closeSessionFactory();
}
它不起作用。
这是实体关系的hbm映射文件，
country.hbm.xml
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Country" table="country">
<id name="countryId" type="java.lang.Short" column="COUNTRY_ID" >
<generator class="native" />
</id>
<property name="country" type="java.lang.String">
<column name="COUNTRY"/>
</property>
<property name="lastUpdate" type="timestamp">
<column name="LAST_UPDATE"/>
</property>
<bag name="cityList" table="city"
inverse="true" lazy="true" fetch="select">
<key>
<column name="city_id" not-null="true" />
</key>
<one-to-many class="com.journaldev.hibernate.model.City" />
</bag>
</class>
</hibernate-mapping>
city.hbm.xml
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.City" table="city">
<id name="cityId" type="java.lang.Short" column="CITY_ID" >
<generator class="native" />
</id>
<property name="city" type="java.lang.String">
<column name="CITY"/>
</property>
<property name="lastUpdate" type="timestamp">
<column name="LAST_UPDATE"/>
</property>
<bag name="addressList" table="address"
inverse="true" lazy="true" fetch="select">
<key>
<column name="ADDRESS_ID" not-null="true" />
</key>
<one-to-many class="com.journaldev.hibernate.model.Address" />
</bag>
<many-to-one name="country" class="com.journaldev.hibernate.model.Country" fetch="select">
<column name="COUNTRY_ID" not-null="true" />
</many-to-one>
</class>
</hibernate-mapping>
address.hbm.xml
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Address" table="address">
<id name="addressId" type="java.lang.Short" column="ADDRESS_ID" >
<generator class="native" />
</id>
<property name="address" type="java.lang.String">
<column name="ADDRESS"/>
</property>
<property name="address2" type="java.lang.String">
<column name="ADDRESS2"/>
</property>
<property name="district" type="java.lang.String">
<column name="DISTRICT"/>
</property>
<property name="postalCode" type="java.lang.String">
<column name="POSTAL_CODE"/>
</property>
<property name="phone" type="java.lang.String">
<column name="PHONE"/>
</property>
<property name="lastUpdate" type="timestamp">
<column name="LAST_UPDATE"/>
</property>
<many-to-one name="city" class="com.journaldev.hibernate.model.City" fetch="select">
<column name="city_id" not-null="true" />
</many-to-one>
<bag name="employeesList" table="EMPLOYEES"
inverse="true" lazy="true" fetch="select">
<key>
<column name="id" not-null="true" />
</key>
<one-to-many class="com.journaldev.hibernate.model.Employees" />
</bag>
</class>
</hibernate-mapping>
users.hbm.xml
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Users" table="USERS">
<id name="id" type="java.lang.Integer">
<column name="ID"/>
<generator class="foreign">
<param name="property">employee</param>
</generator>
</id>
<one-to-one cascade="save-update, delete" class="com.journaldev.hibernate.model.Employees" name="employee"/>
<property name="username" type="java.lang.String">
<column name="USERNAME"/>
</property>
<property name="password" type="java.lang.String">
<column name="PASSWORD"/>
</property>
<property name="roles"
type="com.journaldev.hibernate.model.RolesUserType"
update="true"
insert="true"
access="property"
not-null="true">
<column name="roles_user_type" />
</property>
</class>
</hibernate-mapping>
employees.hbm.xml
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Employees" table="EMPLOYEES">
<id name="id" type="java.lang.Integer">
<column name="ID"/>
<generator class="foreign">
<param name="property">user</param>
</generator>
</id>
<one-to-one class="com.journaldev.hibernate.model.Users" constrained="true" name="user"/>
<property name="name" type="java.lang.String">
<column name="NAME"/>
</property>
<property name="jobRole" type="java.lang.String">
<column name="ROLE"/>
</property>
<property name="insertTime" type="timestamp">
<column name="INSERT_TIME"/>
</property>
<many-to-one name="address" class="com.journaldev.hibernate.model.Address" fetch="select">
<column name="ADDRESS_ID" not-null="true" />
</many-to-one>
<many-to-one name="department" class="com.journaldev.hibernate.model.Department" fetch="select">
<column name="DEPARTMENT_ID" not-null="true" />
</many-to-one>
</class>
</hibernate-mapping>
department.hbm.xml
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Department" table="department">
<id name="departmentId" type="java.lang.Long" column="DEPARTMENT_ID" >
<generator class="native" />
</id>
<property name="departmentName" type="java.lang.String">
<column name="DEPT_NAME"/>
</property>
<bag name="employees" table="employees"
inverse="true" lazy="true" fetch="select">
<key>
<column name="ID" not-null="true" />
</key>
<one-to-many class="com.journaldev.hibernate.model.Employees" />
</bag>
</class>
</hibernate-mapping>
这是输出和它给我的例外，
Hibernate：选择country0_.COUNTRY_ID作为COUNTRY_1_4_0_，country0_.COUNTRY作为COUNTRY2_4_0_，＆gt;＆gt; country0_.LAST_UPDATE作为LAST_UPD3_4_0_来自国家country0_，其中country0_.COUNTRY_ID =？
Hibernate：选择city0_.CITY_ID为CITY_ID1_3_0_，city0_.CITY为CITY2_3_0_，city0_.LAST_UPDATE为＆gt;＆gt; LAST_UPD3_3_0_，city0_.COUNTRY_ID为COUNTRY_4_3_0_来自city city0_，其中city0_.CITY_ID =？
休眠：选择地址0_.ADDRESS_ID作为ADDRESS_1_2_0_，地址0_ADDRESS作为ADDRESS2_2_0_，＆gt;＆gt;地址0_.ADDRESS2作为ADDRESS3_2_0_，地址0_.DISTRICT作为DISTRICT4_2_0_，地址0_.POSTAL_CODE作为＆gt;＆gt; POSTAL_C5_2_0_，地址0_.PHONE作为PHONE6_2_0_， address0_.LAST_UPDATE为LAST_UPD7_2_0_，＆gt;＆gt;＆gt;地址0_.city_id为city_id8_2_0_，来自地址address0_，其中address0_.ADDRESS_ID =？
部门：行政
国家：英国
城市：伦敦
地址：乌鲁阿潘街548号
oct 14, 2014 12:29:14 AM
Exception in thread "main" java.lang.reflect.UndeclaredThrowableException
at com.sun.proxy.$Proxy0.save(Unknown Source)
at com.journaldev.hibernate.main.Main.main(Main.java:70)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:356)
... 2 more
Caused by: java.lang.StackOverflowError
at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1094)
at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1452)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:116)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
at org.hibernate.id.ForeignGenerator.generate(ForeignGenerator.java:123)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:117)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
......还有更多
但事实上，当我执行项目文件时，该项目是maven，它在构建时失败。
那么请问，我该怎样做才能实现这种行为？
由于
答案 0 :(得分：0)
这里你有一个正确的users.hbm.xml和employees.hbm.xml文件是它们之间的关系，一对一，
<?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">
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Users" table="users">
<id name="id" type="java.lang.Integer" column="id">
<generator class="native" />
</id>
<one-to-one cascade="save-update, delete" class="com.journaldev.hibernate.model.Employees" name="employee"/>
<property name="username" type="java.lang.String">
<column name="username"/>
</property>
<property name="password" type="java.lang.String">
<column name="password"/>
</property>
<property name="roles"
type="com.journaldev.hibernate.model.RolesUserType"
update="true"
insert="true"
access="property"
not-null="true">
<column name="roles_user_type" />
</property>
</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">
<hibernate-mapping>
<class name="com.journaldev.hibernate.model.Employees" table="employees">
<id name="id" type="java.lang.Integer">
<column name="id"/>
<generator class="foreign">
<param name="property">user</param>
</generator>
</id>
<one-to-one class="com.journaldev.hibernate.model.Users" constrained="true" name="user"/>
<property name="name" type="java.lang.String">
<column name="name"/>
</property>
<property name="jobRole" type="java.lang.String">
<column name="role"/>
</property>
<property name="insertTime" type="timestamp">
<column name="insert_time"/>
</property>
<many-to-one name="address" class="com.journaldev.hibernate.model.Address" fetch="select">
<column name="address_id" not-null="true" />
</many-to-one>
<many-to-one name="department" class="com.journaldev.hibernate.model.Department" fetch="select">
<column name="department_id" not-null="true" />
</many-to-one>
</class>
</hibernate-mapping>
由于