Detailed introduction to the Hibernate main manifest file configuration

 Hiernate When loading starts，Will go to the project by defaultsrcScan in the directory document，Then load the preparation 

public class H3Utils {

private static SessionFactory factory = new Configuration().configure().buildSessionFactory();

  /**
    * Get the thread-bound session
    * @return
    */
  public static Session getCurrentSession(){
    return ();
  }

}

public class HBUtils {


  //Providing a factory (chain operation)  private static SessionFactory factory = 
    new Configuration()
      .configure("android/longs/study/config/")
      .buildSessionFactory();

  /**
    * Get a new session
    * @return
    */
  public static Session openSession(){
  return () ;
  }

  /**
    * Get the session bound in the current thread
    * @return
    */
  public static Session getCurrentSession(){
  return ();
  }

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
  "/dtd/hibernate-configuration-3.">
<hibernate-configuration>


  <session-factory>
    <!-- 1 Basic4item -->
    <!-- 1.1 Load driver configuration -->
    <property name=".driver_class"></property>
    <!-- 1.2 Database address -->
    <!-- like jdbc:mysql://192.168.1.1:3306/test_java_study?useUnicode=true&characterEncoding=UTF-8-->
    <property name="">url</property>
    <!-- 1.3 Log in to the database username -->
    <property name="">root</property>
    <!-- 1.3 Log in to the database username密码 -->
    <property name="">123456</property>


    <!-- 2 dialect -->
    <property name="">.MySQL5Dialect</property>

    <!-- 3 During development，Optimize settings -->
    <!-- 3.1 Show productionsqlStatement -->
    <property name="hibernate.show_sql">true</property>
    <!-- 3.2 Format displaysql -->
    <property name="hibernate.format_sql">true</property>
    <!-- 4 Table creation -->
    <property name="hibernate.">update</property>


    <!-- 5 Cancelbeancheck -->
    <property name="">none</property>

    <!-- 6 WillsessionBind when in the local thread * hibernate session manage ： 只Will使用。 * When Configuration thread，SessionFactorysupply 
      getCurrentSession() Will可以使用。 * hibernateLow-level use ThreadLocal Thread local variables，Data can be shared in one thread。 
      *** get() ##(Thread) *** set(value) ##(Thread,value) *** remove() 
      ##(Thread) -->
    <property name="hibernate.current_session_context_class">thread</property>

    <!-- Integrationc3p0 -->
    <property name=".provider_class">.C3P0ConnectionProvider</property>

    <!-- Object class Mapping files -->
    <mapping resource="android/longs/study/home/servlet/model/" />

  </session-factory>

</hibernate-configuration>

The value can be 
  create : Tables will be created every time，If the table already exists, delete。（test）After the program ends，The table exists。

  create-drop:Tables will be created every time，If the table already exists, delete。（test）After the program ends，The table will be deleted。
          Notice：Must be executed () Otherwise with“create”same

  update ： If the table does not exist，Will create。If there is，Will maintain the corresponding relationship（Mapping files - surface）【】
          Notice：Only responsible for adding，But no deletion。
  validate ： Runtime，Will verify Mapping files and surface Corresponding relationship，If the corresponding program is running normally，If the exception is not thrown。

   <!-- Configure isolation level -->
    <property name="">4</property>

    <!-- Turn on Level 2 cache -->
    <property name=".use_second_level_cache">true</property>
    <!-- Provider -->
    <property name=".provider_class"></property>
    <!-- Turn on query cache -->
    <property name=".use_query_cache">true</property>
    <!-- Level 2 cache monitoring -->
    <property name="hibernate.generate_statistics">true</property>

    <!-- Class cache -->
    <!-- comPackedCustomerkind -->
    <class-cache usage="read-write" class=""/>
    <!-- comPackedOrderBag -->
    <class-cache usage="read-write" class=""/>

    <!-- Collection cache -->
    <!-- comPackedCustomerkind中的orderSetgather -->
    <collection-cache usage="read-write" collection=""/>