herbnate session.createSQLQuery(sql) 和 session.createQuery(sql)使用

public class DistributeDao implements Serializable{
    private SessionFactory sessionFactory;  
    
    public Session getSession() {  
        return sessionFactory.getCurrentSession();  
    }  
  
    public SessionFactory getSessionFactory() {  
        return sessionFactory;  
    }  
  
    public void setSessionFactory(SessionFactory sessionFactory) {  
        this.sessionFactory = sessionFactory;  
    }  
    
    public Task getTask(Integer id) {
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        List<Task> datas = session.createQuery("from  TestMessage").list();//TestMessage是一个java类，这个类和某一个表对应！
        tran.commit();
        return datas.get(id);
    }

    public void saveTask(Task task) {
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        session.save(task); 
        tran.commit();
    }

    public List<Task> findAllTask() {
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        List<Task> datas = session.createQuery("from Task").list();
        tran.commit();
        return datas;
    }
    
    public List<Task> findAllFinishedTask() {
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        List<Task> datas = session.createQuery("from Task where state=2").list();
        tran.commit();
        return datas;
    }
    
    public List<Task> findUserTaskFinish(String developName){
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        String sql="select * from task where task.taskid in (select taskteam.taskid from taskteam where taskteam.developName=\'" + developName + "\') and task.state=2";
        List<Task> datas = (List<Task>)session.createSQLQuery(sql).addEntity(Task.class).list();
        tran.commit();
        return datas;
    }
    
    public List<Task> findUserTaskNoParticipateTask(String developName){
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        String sql="select * from task where task.taskid not in (select taskteam.taskid from taskteam where developName=\'" + developName + "\')";
        List<Task> datas = (List<Task>)session.createSQLQuery(sql).addEntity(Task.class).list();//必须有addEntity()方法，否则不能
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　//返回具体的类型，其实返回的是Object
        tran.commit();
        return datas;
    }
    
    public List<Task> findUserTaskParticipating(String developName){
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        String sql="select * from task where task.taskid in (select taskteam.taskid from taskteam where developName=\'" + developName + "\') and task.state=1";
        List<Task> datas = (List<Task>)session.createSQLQuery(sql).addEntity(Task.class).list();
        tran.commit();
        return datas;
    }
    
    public List<DevelopingParty> findTaskAllUser(int taskid){
        Session session = this.getSession();
        Transaction tran = session.beginTransaction();
        String sql="select * from developingparty where developingparty.developName in (select taskteam.developingparty from taskteam where taskteam.taskid=" + taskid + ")";
        List<DevelopingParty> datas = session.createSQLQuery(sql).addEntity(DevelopingParty.class).list();
        tran.commit();
        return datas;
    }
}