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blog名称:四裤全输的小窝～～
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建立时间:2005年10月29日 | |
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 [Hibernate]Hibernate入门配置
文章收藏, 网上资源, 软件技术, 电脑与网络 四裤全输 发表于 2006/10/16 20:35:14
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转自：www.javafan.net/article/20060608205832987.html一、建表<<<<<<<<<<<<<表cat>>>>>>>>>>>>>>>>>>>>>>>>>>>>>CREATE TABLE cat ( cat_id varchar(20) NOT NULL, NAME varchar(20) NOT NULL, sex CHAR(1), 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）
<<<<<<<<<<<<<cat.hbm.xml>>>>>>>>>>>>>>>>>>>>>>><?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="com.netease.wireless.groupsms.hbnt.po.Cat" table="cat">
<id name="id" type="string" unsaved-value="null" > <column name="cat_id" sql-type="varchar(20)" not-null="true"/> <generator class="uuid.hex"/> </id>
<property name="name"> <column name="NAME" sql-type="varchar(20)" not-null="true"/> </property>
<property name="sex"/>
<property name="weight"/>
</class>
</hibernate-mapping>
<<<<<<<<<<<<<Cat.java>>>>>>>>>>>>>>>>>>>>>>>>>package com.netease.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）<property name="connection.username">root</property> <property name="connection.password">root</property><property name="connection.provider_class">net.sf.hibernate.connection.DatasourceConnectionProvider</property><property name="jndi.class">org.gjt.mm.mysql.Driver</property>
<<<<<<<<<<<<<hibernate.cfg.xml>>>>>>>>>>>>>>>>>>>>>>><?xml version='1.0' encoding='UTF-8'?><!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">
<!-- DO NOT EDIT: This is a generated file that is synchronized --><!-- by MyEclipse Hibernate tool integration. --><hibernate-configuration>
<session-factory> <!-- properties --> <property name="connection.datasource">java:comp/env/jdbc/test</property> <property name="show_sql">true</property> <property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property> <!-- mapping files --> <mapping resource="com/netease/wireless/groupsms/hbnt/po/cat.hbm.xml"/> </session-factory>
</hibernate-configuration>
四、测试servlet
//Session生成/关闭<<<<<<<<<<<<<HibernateUtil.java>>>>>>>>>>>>>>>>>>>>>>>
package com.netease.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 http://hibernate.org/42.html}. */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.<br><br> * Examples: <br> * <code>CONFIG_FILE_LOCATION = "/hibernate.conf.xml". * CONFIG_FILE_LOCATION = "/com/foo/bar/myhiberstuff.conf.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 { cfg.configure(CONFIG_FILE_LOCATION); //cfg.configure(); 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() { }
}
<<<<<<<<<<<<<测试HbntTestSvlt.java>>>>>>>>>>>>>>>>>>>>>>>
/* * * @(#)CorpSMS.corpsms V1.0 2005-1-15 * Copyright 2003 NetEase, Inc. All rights reserved. * * coder: sweater * email: wtshi@corp.netease.com * * graphic designer: * email: * * fuction：向电话薄中添加组和电话号码 * */
package com.netease.wireless.groupsms.vo;
import java.io.IOException;import java.io.PrintWriter;import java.util.Iterator;
import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;
import net.sf.hibernate.HibernateException;import net.sf.hibernate.Query;import net.sf.hibernate.Session;import net.sf.hibernate.Transaction;
import com.netease.wireless.groupsms.hbnt.po.Cat;import com.netease.wireless.groupsms.hbnt.util.HibernateUtil;/** * * @author sweater */public class HbntTestSvlt extends HttpServlet {
/** * Constructor of the object. */ public HbntTestSvlt() { super(); }
/** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here }
/** * The doGet method of the servlet. <br> * * 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/html"); PrintWriter out = response.getWriter();
out.println("<html>"); out.println("<head>"); out.println("<title>Hello Hibernate</title>"); out.println("</head>"); out.println("<body>"); out.println("Hello Hibernate!<br>");
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 = query.iterate(); it.hasNext();) { Cat cat = (Cat) it.next(); out.println("Cat: " + cat.toString() + "<br>"); }
tx.commit();
HibernateUtil.closeSession(); } catch (HibernateException e) { System.out.println(e.getMessage()); //System.out.println(e.printStackTrace()); }
out.println("</body>"); out.println("</html>"); }
/** * The doPost method of the servlet. <br> * * 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/html"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 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. <br> * * @throws ServletException if an error occure */ public void init() throws ServletException { // Put your code here }
}
<<<<<<<<<<<<<该servlet使用时的web.xml>>>>>>>>>>>>>>>>>>>>>>>
<?xml version="1.0" encoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <servlet> <description>hbnttest</description> <display-name>hbnttest</display-name> <servlet-name>HbntTestSvlt</servlet-name> <servlet-class>com.netease.wireless.groupsms.vo.HbntTestSvlt</servlet-class> </servlet>
<servlet-mapping> <servlet-name>HbntTestSvlt</servlet-name> <url-pattern>/servlet/HbntTestSvlt</url-pattern> </servlet-mapping>
</web-app>
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