知识大全 hibernate入门配置

Posted 2022-07-14 知

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　　HibernateUtil java

　　package ease wireless groupsms hbnt util;

　　import net sf hibernate HibernateException;

　　import net sf hibernate Session;

　　import net sf hibernate cfg Configuration;

　　/**

　　* Configures and provides access to Hibernate sessions tied to the

　　* current thread of execution Follows the Thread Local Session

　　* pattern see @link

　　public class HibernateUtil

　　/**

　　* Location of hibernate cfg xml file

　　* NOTICE: Location should be on the classpath as Hibernate uses

　　* #resourceAsStream style lookup for its configuration file That

　　* is place the config file in a Java package the default location

* is the default Java package

* Examples:

* <code>CONFIG_FILE_LOCATION = /nf xml

* CONFIG_FILE_LOCATION = //foo/bar/nf xml </code>

　　private static String CONFIG_FILE_LOCATION = /hibernate cfg xml ;//hibernate cfg xml

　　/** Holds a single instance of Session */

　　private static final ThreadLocal threadLocal = new ThreadLocal();

　　/** The single instance of hibernate configuration */

　　private static final Configuration cfg = new Configuration();

　　/** The single instance of hibernate SessionFactory */

　　private static net sf hibernate SessionFactory sessionFactory;

　　/**

　　* Returns the ThreadLocal Session instance Lazy initialize

* the <code>SessionFactory</code> if needed

　　* @return Session

　　* @throws HibernateException

　　public static Session currentSession() throws HibernateException

　　Session session = (Session) threadLocal get();

　　  if (session == null)

　　if (sessionFactory == null)

　　try

　　nfigure(CONFIG_FILE_LOCATION);

　　//nfigure();

　　sessionFactory = cfg buildSessionFactory();

　　catch (Exception e)

　　System err println( %%%% Error Creating SessionFactory %%%% );

　　System err println( ||||||||||||| + e getMessage());

　　e printStackTrace();

　　session = sessionFactory openSession();

　　threadLocal set(session);

　　return session;

　　/**

　　* Close the single hibernate session instance

　　* @throws HibernateException

　　public static void closeSession() throws HibernateException

　　Session session = (Session) threadLocal get();

　　threadLocal set(null);

　　if (session != null)

　　session close();

　　/**

　　* Default constructor

　　private HibernateUtil()

　　一建表

　　cat表

　　代码

　　CREATE TABLE cat (

　　cat_id varchar( ) NOT NULL

　　NAME varchar( ) NOT NULL

　　sex CHAR( )

　　weight FLOAT

　　PRIMARY KEY (cat_id)

　　);

　　二 po层（系统以cat hbm xml为准一个xml可以写多个class）

　　Xml代码

<<<<<<<<<<<<<cat hbm xml>>>>>>>>>>>>>>>>>>>>>>>

<?xml version= ?>

<!DOCTYPE hibernate mapping PUBLIC //Hibernate/Hibernate Mapping DTD//EN mapping dtd >

</id>

</property>

</class>

</hibernate mapping>

　　Java代码

<<<<<<<<<<<<<Cat java>>>>>>>>>>>>>>>>>>>>>>>>>

　　package ease wireless groupsms hbnt po;

　　public class Cat

　　private String id;

　　private String name;

　　private char sex;

　　private float weight;

　　public Cat()

　　public String getId()

　　return id;

　　public void setId(String id)

　　this id = id;

　　public String getName()

　　return name;

　　public void setName(String name)

　　this name = name;

　　public char getSex()

　　return sex;

　　public void setSex(char sex)

　　this sex = sex;

　　public float getWeight()

　　return weight;

　　public void setWeight(float weight)

　　this weight = weight;

　　public String toString()

　　String strCat = new StringBuffer()

　　 append(this getId()) append( )

　　 append(this getName()) append( )

　　 append(this getSex()) append( )

　　 append(this getWeight())

　　 toString();

　　return strCat;

　　三 hibernate cfg xml

　　（切切不要自己去加属性基本的就两个connection datasource和dialect）

　　Xml代码

<property name= connection provider_class >nnection DatasourceConnectionProvider</property>

<property name= jndi class > gjt mm mysql Driver</property>

<<<<<<<<<<<<<hibernate cfg xml>>>>>>>>>>>>>>>>>>>>>>>

<?xml version= encoding= UTF ?>

<!DOCTYPE hibernate configuration PUBLIC

　　 //Hibernate/Hibernate Configuration DTD //EN

　　 configuration dtd >

<! DO NOT EDIT: This is a generated file that is synchronized >

<! by MyEclipse Hibernate tool integration >

<! properties >

<property name= dialect >net sf hibernate dialect MySQLDialect</property>

<! mapping files >

</session factory>

</hibernate configuration>

　　四测试servlet

　　//Session生成/关闭

　　Java代码

<<<<<<<<<<<<<测试HbntTestSvlt java>>>>>>>>>>>>>>>>>>>>>>>

　　* @(#)rpsms V

　　* coder: sweater

　　* email:

　　* graphic designer:

　　* email:

　　* fuction 向电话薄中添加组和电话号码

　　package ease wireless groupsms vo;

　　import java io IOException;

　　import java io PrintWriter;

　　import java util Iterator;

　　import javax servlet ServletException;

　　import javax servlet HttpServlet;

　　import javax servlet HttpServletRequest;

　　import javax servlet HttpServletResponse;

　　import net sf hibernate HibernateException;

　　import net sf hibernate Query;

　　import net sf hibernate Session;

　　import net sf hibernate Transaction;

　　import ease wireless groupsms hbnt po Cat;

　　import ease wireless groupsms hbnt util HibernateUtil;

　　/**

　　* @author sweater

　　public class HbntTestSvlt extends HttpServlet

　　/**

　　* Constructor of the object

　　public HbntTestSvlt()

　　super();

　　/**

* Destruction of the servlet

　　public void destroy()

　　super destroy(); // Just puts destroy string in log

　　// Put your code here

　　/**

* The doGet method of the servlet

　　* This method is called when a form has its tag value method equals to get

　　* @param request the request send by the client to the server

　　* @param response the response send by the server to the client

　　* @throws ServletException if an error occurred

　　* @throws IOException if an error occurred

　　public void doGet(HttpServletRequest request HttpServletResponse response)

　　throws ServletException IOException

　　response setContentType( text/ );

　　PrintWriter out = response getWriter();

out println( <> );

out println( <head> );

out println( <title>Hello Hibernate</title> );

out println( </head> );

out println( <body> );

out println( Hello Hibernate! );

　　try

　　Session session = HibernateUtil currentSession();

　　Transaction tx = session beginTransaction();

　　Query query = session createQuery( select cat from Cat as cat where cat sex = :sex );

　　query setCharacter( sex F );

　　for (Iterator it = erate(); it hasNext();)

　　Cat cat = (Cat) it next();

out println( Cat: + cat toString() + );

　　mit();

　　HibernateUtil closeSession();

　　 catch (HibernateException e)

　　System out println(e getMessage());

　　//System out println(e printStackTrace());

out println( </body> );

out println( </> );

　　/**

* The doPost method of the servlet

　　* This method is called when a form has its tag value method equals to post

　　* @param request the request send by the client to the server

　　* @param response the response send by the server to the client

　　* @throws ServletException if an error occurred

　　* @throws IOException if an error occurred

　　public void doPost(HttpServletRequest request HttpServletResponse response)

　　throws ServletException IOException

　　response setContentType( text/ );

　　PrintWriter out = response getWriter();

out println( <!DOCTYPE HTML PUBLIC \\ //W C//DTD HTML Transitional//EN\\ > );

out println( <HTML> );

out println( <HEAD><TITLE>A Servlet</TITLE></HEAD> );

out println( <BODY> );

　　out print( This is );

　　out print(this getClass());

　　out println( using the POST method );

out println( </BODY> );

out println( </HTML> );

　　out flush();

　　out close();

　　/**

　　* Returns information about the servlet such as

　　* author version and copyright

　　* @return String information about this servlet

　　public String getServletInfo()

　　return This is my default servlet created by Eclipse ;

　　/**

* Initialization of the servlet

　　* @throws ServletException if an error occure

　　public void init() throws ServletException

　　// Put your code here

　　Xml代码

<<<<<<<<<<<<<该servlet使用时的web xml>>>>>>>>>>>>>>>>>>>>>>>

<?xml version= encoding= UTF ?>

<web app version=

　　xmlns=

　　xmlns:xsi= instance

　　xsi:schemaLocation=

　　 app_ _ xsd >

<description>hbnttest</description>

<display name>hbnttest</display name>

<servlet name>HbntTestSvlt</servlet name>

<servlet class>ease wireless groupsms vo HbntTestSvlt</servlet class>

</servlet>

<servlet name>HbntTestSvlt</servlet name>

<url pattern>/servlet/HbntTestSvlt</url pattern>

</servlet mapping>

</web app>

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