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;
}
}