插入多行休眠很慢

我有大約5000行插入到我的數據庫使用休眠，但它持續約2分鐘，我不知道爲什麼。這裏是我的代碼：插入多行休眠很慢

的hibernate.cfg.xml：

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-configuration SYSTEM 
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 

<hibernate-configuration> 
    <session-factory> 
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
    <property name="hibernate.connection.url">jdbc:mysql://sql.user.nazwa.pl:3307/user</property> 
     <property name="hibernate.jdbc.batch_size">20</property> 
    <property name="hibernate.connection.username">user</property> 
    <property name="hibernate.connection.password">pasword</property> 
     <property name="show_sql">false</property> 
     <mapping resource="model/models.hbm.xml"/> 
</session-factory> 
</hibernate-configuration>

models.hbm.xml：

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
     "-//Hibernate/Hibernate Mapping DTD//EN" 
     "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping> 

    <class name="model.User" table="User"> 
     <id name="userId" type="int" column="userId"> 
      <generator class="native"/> 
     </id> 

     <property name="userName" column="userName" type="string"/> 
     <property name="height" column="height" type="double"/> 
     <property name="weight" column="weight" type="double"/> 
     <property name="hrMax" column="hrMax" type="double"/> 
     <property name="hrMin" column="hrMin" type="double"/> 

     <set name="trainings" cascade="all-delete-orphan,save-update" lazy="false"> 
      <key column="userId"/> 
      <one-to-many class="model.Training"/> 
     </set> 
    </class> 

    <class name="model.Training" table="Training"> 
     <id name="trainingId" type="int" column="trainingId"> 
      <generator class="native"/> 
     </id> 

     <property name="type" column="type" type="string"/> 
     <property name="date" column="date" type="string"/> 
     <property name="duration" column="duration" type="org.hibernate.type.LocalTimeType"/> 
     <property name="totalDistance" column="totalDistance" type="double"/> 
     <property name="averageHeartRate" column="averageHeartRate" type="int"/> 
     <property name="averageSpeed" column="averageSpeed" type="double"/> 
     <property name="maxSpeed" column="maxSpeed" type="double"/> 
     <property name="calories" column="calories" type="int"/> 
     <property name="fatPercentageOfCalories" column="fatPercentageOfCalories" type="int"/> 

     <set name="trainingDetails" cascade="all-delete-orphan,save-update" lazy="false"> 
      <key column="trainingId"/> 
      <one-to-many class="model.TrainingDetails"/> 
     </set> 
    </class> 

    <class name="model.TrainingDetails" table="TrainingDetails"> 
     <id name="id" type="int" column="id"> 
      <generator class="native"/> 
     </id> 

     <property name="time" column="time" type="org.hibernate.type.LocalTimeType"/> 
     <property name="heartRate" column="heartRate" type="int"/> 
     <property name="speed" column="speed" type="double"/> 
     <property name="altitude" column="altitude" type="int"/> 
     <property name="distance" column="distance" type="double"/> 
    </class> 


</hibernate-mapping>

HibernateUtil.java：

package model; 

import org.hibernate.SessionFactory; 
import org.hibernate.cfg.Configuration; 

/** 
* Created by Piotr on 2015-10-11. 
*/ 
public class HibernateUtil { 

    private static final SessionFactory sessionFactory = buildSessionFactory(); 

    private static SessionFactory buildSessionFactory() { 
     try { 
      // Create the SessionFactory from hibernate.cfg.xml 
      return new Configuration().configure().buildSessionFactory(); 

     } catch (Throwable ex) { 
      // Make sure you log the exception, as it might be swallowed 
      System.err.println("Initial SessionFactory creation failed." + ex); 
      throw new ExceptionInInitializerError(ex); 
     } 
    } 

    public static SessionFactory getSessionFactory() { 
     return sessionFactory; 
    } 

    public static void shutdown() { 
     // Close caches and connection pools 
     getSessionFactory().close(); 
    } 
}

方法執行時間過長：

public void addTrainingsDetailsToTraining(Map<String, String> mapOne, Map<String, ArrayList<String>> mapTwo 
      , int trainingId, int rowCount) { 
     Session session = hibernateUtil.getSessionFactory().openSession(); 
     session.setCacheMode(CacheMode.IGNORE); 
     Transaction tx = null; 
     try { 
      tx = session.beginTransaction(); 
      Training training = (Training) session.get(Training.class, trainingId); 
      for (int i = 0; i < rowCount; i++) { 
       training.getTrainingDetails().add(new TrainingDetails(LocalTime.parse(mapTwo.get(time).get(i)) 
         , Integer.parseInt(mapTwo.get(heartRate).get(i)), Double.parseDouble(mapTwo.get(speed).get(i)) 
         , Integer.parseInt(mapTwo.get(altitude).get(i)), Double.parseDouble(mapTwo.get(distance).get(i)))); 
       if (i % 20 == 0) { 
        session.flush(); 
        session.clear(); 
       } 
      } 
      session.update(training); 
      tx.commit(); 
     } catch (Exception e) { 
      if (tx != null) tx.rollback(); 
      e.printStackTrace(); 
     } finally { 
      session.close(); 
     } 
    }

來源

2015-10-20 user3061714

，如果你的更新信息將不會馬上得到，那麼你可以把你的更新代碼在一個線程中，所以可以立即得到控制權 –