Hibernate 双向 多 对 多 对象关系映射 ，测试 crud

package com.baidu.doublemany2many;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;import org.junit.After;import org.junit.Before;import org.junit.Test;public class TestRU {private  SessionFactory sessionFactory;private  Session session;private  Transaction transaction;@Beforepublic void init(){Configuration configuration = new Configuration().configure();ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();sessionFactory = configuration.buildSessionFactory(serviceRegistry);session = sessionFactory.openSession();transaction = session.beginTransaction();System.out.println("init....");}@Afterpublic void destroy(){transaction.commit();session.close();sessionFactory.close();System.out.println("destory....");}@Testpublic void test() {User user = new User();user.setuName("User_A");User user2 = new User();user2.setuName("User_B");Role role = new Role();role.setrName("Manager_A");Role role2 = new Role();role2.setrName("Manager_B");//设置关联关系user.getRoles().add(role);user.getRoles().add(role2);user2.getRoles().add(role);user2.getRoles().add(role2);role.getUsers().add(user);role.getUsers().add(user2);role2.getUsers().add(user);role2.getUsers().add(user2);//执行保存操作session.save(user);session.save(user2);session.save(role);session.save(role2);}}

运行的SQL

Hibernate:     insert     into        USER        (U_NAME)     values        (?)Hibernate:     insert     into        USER        (U_NAME)     values        (?)Hibernate:     insert     into        ROLE        (R_NAME)     values        (?)Hibernate:     insert     into        ROLE        (R_NAME)     values        (?)Hibernate:     insert     into        T_USER_ROLE        (U_ID, R_ID)     values        (?, ?)Hibernate:     insert     into        T_USER_ROLE        (U_ID, R_ID)     values        (?, ?)Hibernate:     insert     into        T_USER_ROLE        (U_ID, R_ID)     values        (?, ?)Hibernate:     insert     into        T_USER_ROLE        (U_ID, R_ID)     values        (?, ?)