通過getCurrentSession()創(chuàng)建的Session會綁定到當(dāng)前線程上；openSession()不會。

通過getCurrentSession()獲取Session，首先是從當(dāng)前上下文中尋找舊的Session,如果沒有，則創(chuàng)建新的Session；而openSession()是每次都創(chuàng)建新的Session。

getCurrentSession()創(chuàng)建的Session在事物提交時自動關(guān)閉；openSession()創(chuàng)建的Session需要手動關(guān)閉。 1 @Test 2 public void testTeacherSave() { 3 4 Teacher t = new Teacher(); 5 6 t.setName("t1"); 7 t.setTitle("middle"); 8 t.setBirthDate(new Date()); 9 10 Session session = sessionFactory.openSession(); 11 //Session session = sessionFactory.getCurrentSession(); 12 13 session.beginTransaction(); 14 session.save(t); 15 16 Session session2 = sessionFactory.getCurrentSession(); 17 18 System.out.println(session == session2); 19 20 session.getTransaction().commit(); 21 22 Session session3 = sessionFactory.getCurrentSession(); 23 24 System.out.println(session == session3); 25 26 }

輸出：Hibernate:
??? insert
??? into
??????? Teacher
??????? (birthDate, gender, good, name, title)
??? values
??????? (?, ?, ?, ?, ?)
false
false

1 @Test 2 public void testTeacherSave() { 3 4 Teacher t = new Teacher(); 5 6 t.setName("t1"); 7 t.setTitle("middle"); 8 t.setBirthDate(new Date()); 9 10 //Session session = sessionFactory.openSession(); 11 Session session = sessionFactory.getCurrentSession(); 12 13 session.beginTransaction(); 14 session.save(t); 15 16 Session session2 = sessionFactory.getCurrentSession(); 17 18 System.out.println(session == session2); 19 20 session.getTransaction().commit(); 21 22 Session session3 = sessionFactory.getCurrentSession(); 23 24 System.out.println(session == session3); 25 26 }

輸出：Hibernate:
??? insert
??? into
??????? Teacher
??????? (birthDate, gender, good, name, title)
??? values
??????? (?, ?, ?, ?, ?)
true
false

轉(zhuǎn)載于:https://www.cnblogs.com/ming-zi/p/5937961.html

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