<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory>        <!-- Database connection settings -->        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="connection.url">jdbc:mysql://127.0.0.1/testdb</property>        <property name="connection.username">root</property>        <property name="connection.password"></property>        <!-- JDBC connection pool (use the built-in) -->        <property name="connection.pool_size">1</property>        <!-- SQL dialect -->        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>        <!-- Enable Hibernate‘s automatic session context management -->        <property name="current_session_context_class">thread</property>        <!-- Disable the second-level cache  -->        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>        <!-- Echo all executed SQL to stdout -->        <property name="show_sql">true</property>        <!-- Drop and re-create the database schema on startup -->        <property name="hbm2ddl.auto">update</property>        <mapping resource="com/my/hbm/User.hbm.xml"/>        <mapping resource="com/my/hbm/Bank.hbm.xml"/>    </session-factory></hibernate-configuration>

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping>    <class name="com.my.bean.Bank" table="bank">        <id name="bankID" column="bank_id" type="long">            <generator class="native"></generator>        </id>        <set name="users" table="card">            <key column="bank_id"></key>            <many-to-many class="com.my.bean.User" column="user_id"></many-to-many>        </set>        <property name="bankName" column="bank_name" type="java.lang.String" length="100" not-null="true"></property>    </class></hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping>    <class name="com.my.bean.User" table="user">        <id name="userID" column="user_id" type="long">            <generator class="native"></generator>        </id>        <set name="banks" table="card">            <key column="user_id"></key>            <many-to-many class="com.my.bean.Bank" column="bank_id"></many-to-many>        </set>        <property name="userName" column="user_name" type="java.lang.String" length="100" not-null="true"></property>    </class></hibernate-mapping>

package com.my.bean;import java.util.Set;public class Bank {    private long bankID;    private String bankName;    private Set<User> users;        public long getBankID() {        return bankID;    }    public void setBankID(long bankID) {        this.bankID = bankID;    }    public String getBankName() {        return bankName;    }    public void setBankName(String bankName) {        this.bankName = bankName;    }    public Set<User> getUsers() {        return users;    }    public void setUsers(Set<User> users) {        this.users = users;    }}

package com.my.bean;import java.util.Set;public class User {    private long userID;    private String userName;    private Set<Bank> banks;        public long getUserID() {        return userID;    }    public void setUserID(long userID) {        this.userID = userID;    }    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public Set<Bank> getBanks() {        return banks;    }    public void setBanks(Set<Bank> banks) {        this.banks = banks;    }}

package com.my.init;import java.util.HashSet;import org.hibernate.Session;import org.hibernate.Transaction;import com.my.bean.Bank;import com.my.bean.User;import com.my.dao.util.HibernateUtil;public class Test {    public static void main(String[] args) {        Session session = HibernateUtil.getSessionFactory().openSession();        Transaction tx = session.beginTransaction();                try {            // create user            User userRobin = new User();            userRobin.setUserName("Robin");            userRobin.setBanks(new HashSet<Bank>());            User userBen = new User();            userBen.setUserName("Ben");            userBen.setBanks(new HashSet<Bank>());                        // create bank            Bank bankCBC = new Bank();            bankCBC.setBankName("CBC");            bankCBC.setUsers(new HashSet<User>());            Bank bankBBC = new Bank();            bankBBC.setBankName("BBC");            bankBBC.setUsers(new HashSet<User>());                        // add relationship            userRobin.getBanks().add(bankCBC);            userRobin.getBanks().add(bankBBC);            userBen.getBanks().add(bankCBC);            userBen.getBanks().add(bankBBC);                        session.save(userRobin);            session.save(userBen);            session.save(bankCBC);            session.save(bankBBC);                        tx.commit();        } catch (Exception e) {            tx.rollback();            e.printStackTrace();        }                session.close();    }}