maven构建hibernate框架
2014-12-21 18:22
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<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">推荐maven中央仓库路径</span>
maven repository： http://www.mvnrepository.com/
1.新建maven project
2.建立动态web项目
3.填写基本项目信息完成
建完之后会出现这种情况，是因为没有载入httpservlet，填写pom.xml配置文件，给项目配置httpservlet
<dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency>复制到配置文件中，就没问题了。
网上搜寻hibernate的核心包就行
<dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.3.7.Final</version> </dependency>
</pre><p>mysql连接驱动</p><p><img src="" alt="" /></p><p></p><pre name="code" class="html"><dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.34</version> </dependency>
你的libraries里会自动多出从中央仓库里下载下来的jar包
接下来就是配置hibernate了
简单的简历Servlet post简单输出
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.sample.bean.User;
import cn.sample.test.Test;
/**
* Servlet implementation class MyServlet
*/
public class MyServlet extends HttpServlet {
<span style="white-space:pre"> </span>private static final long serialVersionUID = 1L;
<span style="white-space:pre"> </span>/**
<span style="white-space:pre"> </span> * @see HttpServlet#HttpServlet()
<span style="white-space:pre"> </span> */
<span style="white-space:pre"> </span>public MyServlet() {
<span style="white-space:pre"> </span>super();
<span style="white-space:pre"> </span>// TODO Auto-generated constructor stub
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>/**
<span style="white-space:pre"> </span> * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
<span style="white-space:pre"> </span> * response)
<span style="white-space:pre"> </span> */
<span style="white-space:pre"> </span>protected void doGet(HttpServletRequest request,
<span style="white-space:pre"> </span>HttpServletResponse response) throws ServletException, IOException {
<span style="white-space:pre"> </span>// TODO Auto-generated method stub
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>/**
<span style="white-space:pre"> </span> * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
<span style="white-space:pre"> </span> * response)
<span style="white-space:pre"> </span> */
<span style="white-space:pre"> </span>protected void doPost(HttpServletRequest request,
<span style="white-space:pre"> </span>HttpServletResponse response) throws ServletException, IOException {
<span style="white-space:pre"> </span>// TODO Auto-generated method stub
<span style="white-space:pre"> </span>response.setContentType("text/html");
<span style="white-space:pre"> </span>request.setCharacterEncoding("utf-8");
<span style="white-space:pre"> </span>response.setCharacterEncoding("utf-8");
<span style="white-space:pre"> </span>System.out.println("doPost-----------------");
<span style="white-space:pre"> </span>User user = new User();
<span style="white-space:pre"> </span>user.setName("bbb");
<span style="white-space:pre"> </span>user.setAge(11);
<span style="white-space:pre"> </span>Test.savaBean(user);
<span style="white-space:pre"> </span>}
}<html> <body> <h2>Hello World!</h2> <form action="MyServlet" method="post"> <input type="submit" value="POST"> </form> </body> </html>控制台能够打印输出
创建javabean文件
import java.io.Serializable;
public class User implements Serializable {
private int _id;
private String name;
private int age;
public int get_id() {
return _id;
}
public void set_id(int _id) {
this._id = _id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}然后创建user的hibernate配置文件 User.hbm.xml<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 2014-8-25 16:11:25 by Hibernate Tools 3.4.0.CR1 --> <!-- 持久化映射文件，将java对象映射到数据库表 --> <hibernate-mapping> <span style="white-space:pre"> </span><class name="cn.sample.bean.User" table="t_user"><!-- 数据库表名 --> <span style="white-space:pre"> </span><id name="_id" type="int" column="_id"> <span style="white-space:pre"> </span><generator class="native" /><!-- 自动增长 --> <span style="white-space:pre"> </span></id> <span style="white-space:pre"> </span><property name="name" type="string" column="name" /> <span style="white-space:pre"> </span><property name="age" type="int" column="age" /> <span style="white-space:pre"> </span></class> </hibernate-mapping>
接下来配置hibernate的配置文件映射javabean对象
<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <!--声明Hibernate配置文件的开始 --> <hibernate-configuration> <!--表明以下的配置是针对session-factory配置的，SessionFactory是Hibernate中的一个类，这个类主要负责保存HIbernate的配置信息，以及对Session的操作 --> <session-factory> <!--配置数据库的驱动程序，Hibernate在连接数据库时，需要用到数据库的驱动程序 --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <!--设置数据库的连接url:jdbc:mysql://localhost/hibernate,其中localhost表示mysql服务器名称，此处为本机， hibernate是数据库名 --> <property name="hibernate.connection.url"> jdbc:mysql://localhost:3307/demo?useUnicode=true&characterEncoding=UTF-8</property> <!--连接数据库是用户名 --> <property name="hibernate.connection.username">root</property> <!--连接数据库是密码 --> <property name="hibernate.connection.password">123456</property> <!--数据库连接池的大小 --> <property name="hibernate.connection.pool_size">20</property> <!-- SQL dialect --> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <!--jdbc.fetch_size是指Hibernate每次从数据库中取出并放到JDBC的Statement中的记录条数。Fetch Size设的越大，读数据库的次数越少，速度越快，Fetch Size越小，读数据库的次数越多，速度越慢 --> <property name="jdbc.fetch_size">50</property> <!-- Enable Hibernate's automatic session context management --> <property name="hibernate.current_session_context_class">thread</property> <!-- Disable the second-level cache --> <property name="hibernate.cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property> <!--以格式良好的方式显示SQL语句 --> <property name="hibernate.format_sql">true</property> <!--是否在后台显示Hibernate用到的SQL语句，开发时设置为true，便于差错，程序运行时可以在Eclipse的控制台显示Hibernate的执行Sql语句。项目部署后可以设置为false，提高运行效率 --> <property name="hibernate.show_sql">true</property> <!-- Drop and re-create the database schema on startup --> <property name="hibernate.hbm2ddl.auto">update</property> <mapping resource="cn\sample\bean\User.hbm.xml" /> <!-- <mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml"/> --> </session-factory> </hibernate-configuration>
HibernateSessionFactory.java
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateSessionFactory {
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
static {
sessionFactory = configuration.configure(configFile)
.buildSessionFactory();
}
private HibernateSessionFactory() {
}
public static Session getSession() {
Session session = threadLocal.get();
if (session == null || !session.isOpen()) {
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
}Test.javaimport cn.sample.utils.HibernateSessionFactory;
public class Test {
public static void savaBean(User user) {
Session session = null;
Transaction t = null;
session = HibernateSessionFactory.getSession();
try {
t = session.beginTransaction();
session.save(user);
t.commit();
} catch (Exception e) {
t.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
public static void main(String[] args) {
User user = new User();
user.setName("aaa");
user.setAge(12);
savaBean(user);
}
}附上源码
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