Hibernate多对多增删改查

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package com.qulx.client;

import java.util.Iterator;
import java.util.List;

import org.hibernate.Hibernate;
import org.hibernate.Session;

import com.qulx.pojo.Roles;
import com.qulx.pojo.Users;
import com.qulx.util.HibernateSessionFactory;

public class M2MClient {

/**
* 保存用户
*/
public void saveUser(){
Users user = new Users();
user.setUsername("田七");
user.setUserpass("123456");

Session session = HibernateSessionFactory.getSession();
session.save(user);
session.beginTransaction().commit();
HibernateSessionFactory.closeSession();
}

/**
* 保存角色
*/
public void saveRole(){

Roles role = new Roles();
role.setRolename("一级管理员");
role.setRolecode("admin");

Session session = HibernateSessionFactory.getSession();
session.save(role);
session.beginTransaction().commit();
HibernateSessionFactory.closeSession();
}

/**
* 给用户赋予角色（一个或多个）
* 向中间表添加数据
* * Users.hbm.xml中inverse=false
* Roles.hbm.xml中inverse=true
*/
public void grantUser(long uid,long r1,long r2,long r3){

Session session = HibernateSessionFactory.getSession();
Users user = (Users) session.get("com.qulx.pojo.Users", uid);
Roles role1 = (Roles) session.get(Roles.class, r1);
Roles role2 = (Roles) session.get(Roles.class, r2);
Roles role3 = (Roles) session.get(Roles.class, r3);
//给用户授权
user.getRoleses().add(role1);
user.getRoleses().add(role2);
user.getRoleses().add(role3);
session.update(user);
session.beginTransaction().commit();
HibernateSessionFactory.closeSession();
}


/**
* 修改用户的角色
*/
public void updateUserByRole(long uid,long r1,long r2){

Session session = HibernateSessionFactory.getSession();
Users user = (Users) session.get("com.qulx.pojo.Users", uid);
Roles role1 = (Roles) session.get(Roles.class, r1);
Roles role2 = (Roles) session.get(Roles.class, r2);

user.getRoleses().add(role1);
user.getRoleses().remove(role2);
session.update(user);
session.beginTransaction().commit();
HibernateSessionFactory.closeSession();
}

/**
* 删除用户，不删除角色
* Users.hbm.xml中inverse=false
* Roles.hbm.xml中inverse=true
*/
public void deleteUserByID(long uid){

Session session = HibernateSessionFactory.getSession();
Users user = (Users) session.get(Users.class, uid);
session.delete(user);
session.beginTransaction().commit();
HibernateSessionFactory.closeSession();
}

/**
* 删除角色，不删除用户
* Users.hbm.xml中inverse=false
* Roles.hbm.xml中inverse=true
*
* Hibernate: delete from A722.USERROLE where USERID=? and ROLEID=?
Hibernate: delete from A722.USERROLE where USERID=? and ROLEID=?
Hibernate: delete from A722.USERROLE where USERID=? and ROLEID=?
Hibernate: delete from A722.ROLES where ROLEID=?
*/
public void deleteRoleByID(long rid){

Session session = HibernateSessionFactory.getSession();
Roles role = (Roles) session.get(Roles.class, rid);
Iterator users = role.getUserses().iterator();
while(users.hasNext()){
Users user = (Users)users.next();
user.getRoleses().remove(role);
}
session.delete(role);
session.beginTransaction().commit();
HibernateSessionFactory.closeSession();
}

/**
* 加载用户，获取所有角色
*/
public Users checkUserByID(long uid){
Session session = HibernateSessionFactory.getSession();
Users user = (Users)session.get(Users.class,uid);
if(!Hibernate.isInitialized(user.getRoleses())){
Hibernate.initialize(user.getRoleses());
}
HibernateSessionFactory.closeSession();
return user;
}

/**
* 加载用户，获取所有角色
*/

public List checkRolesByUid(long uid){
Session session = HibernateSessionFactory.getSession();

List roles = session.createSQLQuery("select * from roles where roleid in (select roleid from userrole where userid="+uid+")").addEntity(Roles.class)
.list();

HibernateSessionFactory.closeSession();
System.out.println(roles.size());
return null;
}

public static void main(String[] args) {

M2MClient client = new M2MClient();
//client.saveUser();
//client.saveRole();
//client.grantUser1((long)3,(long)1, (long)4,(long)2);
//client.updateUserByRole((long)2, (long)1, (long)2);
//client.deleteUserByID((long)2);
//client.deleteRoleByID1((long)5)

client.checkRolesByUid((long)5);
//Users user = client.checkUserByID((long)5);
//System.out.println(user.getRoleses().size());

}

}