There is a simple logic to have a try to build many-to-many bidirectional mapping.
persons to addresses, that is, a person has many addresses and a address has accommodated many persons.

The following are details:

Java classes:
public class Address implements java.io.Serializable
{
private Integer id;
private String addressName;
private Set apersonIds = new HashSet();
//omit getter and setter methods
}

public class Person implements java.io.Serializable
{
private Integer id;
private String name;
private Set paddressIds = new HashSet();
//omit getter and setter methods
}

Database Tables:
CREATE TABLE `address` (
`Id` int(11) NOT NULL AUTO_INCREMENT,
`address_name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `person` (
`Id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(10) DEFAULT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `personaddress` (
`jpersonid` int(11) NOT NULL DEFAULT '0',
`jaddressid` int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (`jpersonid`,`jaddressid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

person.hbm.xml:
<hibernate-mapping>
<class name="pojo.Person" table="person" catalog="testperson">

<id name="id" type="java.lang.Integer" column="Id">
<generator class="native"/>
</id>
<property name="name" type="java.lang.String">
<column name="name" length="10" />
</property>
<set name="paddresIds" table="personaddress">
<key column="jpersonid" />
<many-to-many column="jaddressid" class="pojo.Address" />
</set>
</class>
</hibernate-mapping>

address.hbm.xml:
<hibernate-mapping>
<class name="pojo.Address" table="address" catalog="testperson">
<id name="id" type="java.lang.Integer">
<column name="Id" />
<generator class="native"/>
</id>

<property name="addressName" type="java.lang.String">
<column name="address_name" />
</property>

<set name="apersonIds" table="personaddress" cascade="all">
<key column="jaddressid" not-null="true" />
<many-to-many column="jpersonid" class="pojo.Person" />
</set>
</class>
</hibernate-mapping>

.cfg.xml:

<mapping resource="pojo/Address.hbm.xml" />
<mapping resource="pojo/Person.hbm.xml" />

When I run the following codes:

Transaction tr = ses.beginTransaction();

Person per1 = new Person();
per1.setName("Tom");
Person per2 = new Person();
per2.setName("jerry");

Address add1 = new Address();
add1.setAddressName("zoo1");
Address add2 = new Address();
add2.setAddressName("zoo2");

add2.getApersonIds().add(per1);
add1.getApersonIds().add(per1);
add1.getApersonIds().add(per2);
ses.save(add1);
ses.save(add2);
tr.commit();

The exceptions will be shown:
%%%% Error Creating SessionFactory %%%%
org.hibernate.PropertyNotFoundException: Could not find a getter for paddresIds in class pojo.Person
at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:282)
at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:275)
at org.hibernate.mapping.Property.getGetter(Property.java:272)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:247)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:125)
at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:56)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:295)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:434)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:109)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:226)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
at session.factory.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:31)
at pojo.BaseHibernateDAO.getSession(BaseHibernateDAO.java:14)
at pojo.TestPerson.main(TestPerson.java:17)
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Could not parse mapping document from resource pojo/Address.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
at session.factory.HibernateSessionFactory.rebuildSessionFactory(HibernateSessionFactory.java:69)
at session.factory.HibernateSessionFactory.getSession(HibernateSessionFactory.java:53)
at pojo.BaseHibernateDAO.getSession(BaseHibernateDAO.java:14)
at pojo.TestPerson.main(TestPerson.java:17)

Caused by: org.hibernate.DuplicateMappingException: Duplicate collection role mapping pojo.Address.apersonIds
at org.hibernate.cfg.Mappings.addCollection(Mappings.java:124)
at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2066)
at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2041)
at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:359)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:273)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:144)
at org.hibernate.cfg.Configuration.add(Configuration.java:669)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:504)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
... 9 more

This exception is threw out at the statement:
Transaction tr = ses.beginTransaction();

I think the key point is "Duplicate collection role mapping pojo.Address.apersonIds" but I have searched it with no duplication.

can anyone help me deal with that? thanks so much

I think the main problem is the first exception:

How come that the your code continues after that? It seems like it is trying to re-create the session factory a second time after the first failure and in the process of doing that doing something strange with the configuration. Could it be that second exception happens because it is trying to parse the mappings files a second time?

In any case. I think your getter/setter methods for paddresIds has an incorrect name. It should be getPaddresIds()/setPaddresIds().

I am sure that the class has the right getter/setter methods (getPaddressIds/setPaddressIds) like you mentioned above



Yes, It maps a second time, but both mapping are failed.
the exception occurs at

configuration.configure(configFile);

and sure also that we have set a correct configFile value

I just double-checked and noted that the mapping file has a spelling error: <set name="paddresIds"...> It should be <set name="paddressIds" ...>.

Thank you in advance, spelling-error is the point

Your double-check more usefully than my many-check.