Hibernate - 入门实例

实体Customer类：

package wei.peng;

import java.io.Serializable;

public class Customer implements Serializable{

	private static final long serialVersionUID = 4054639727225043549L;
	private int id;
	private String name;
	private int age;
	private String job;
	
	public Customer() {
		super();
	}

	public Customer(int id, String name, int age, String job) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
		this.job = job;
	}

	public int getId() {
		return id;
	}

	public void setId(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;
	}

	public String getJob() {
		return job;
	}

	public void setJob(String job) {
		this.job = job;
	}
	
}

 Customer的Hibernate配置文件（和Customer类在一个目录下）：

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

<hibernate-mapping package="wei.peng">
	<class name="Customer" table="customer">
		<meta attribute="sync–DAO">false</meta>

		<id name="id" type="integer" column="id">
			<generator class="increment"></generator>
		</id>
		
		<property name="name" column="name" type="string" not-null="true"
			length="50">
		</property>

		<property name="age" column="age" type="integer">
		</property>

		<property name="job" column="job" type="string" not-null="true"
			length="50">
		</property>
	</class>
</hibernate-mapping>

 Hibernate配置文件：

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


<hibernate-configuration>
	<session-factory>
		<property name="hibernate.connection.url">
			jdbc:mysql://192.168.235.26:3306/mysql
        </property>

		<property name="hibernate.connection.driver_class">
			com.mysql.jdbc.Driver
        </property>

		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">mysql</property>

		<property name="hibernate.connection.pool_size">10</property>
        
		<property name="dialect">
			org.hibernate.dialect.MySQLDialect
        </property>
        
		<property name="hibernate.show_sql">true</property>
		<property name="hibernate.hbm2ddl.auto">update</property>
		<property name="hibernate.transaction.factory_class">
			org.hibernate.transaction.JDBCTransactionFactory
        </property>
		<mapping resource="wei/peng/Customer.hbm.xml" />
	</session-factory>
</hibernate-configuration>

 

测试类CustomerTest类：

package wei.peng.test;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

import wei.peng.Customer;

public class CustomerTest {

	public static void main(String[] args) {
		try {
			SessionFactory sf = new Configuration().configure().buildSessionFactory();
			Session session = sf.openSession();
			Transaction tx = session.beginTransaction();
			
			Customer cs = new Customer();
			cs.setName("wei.peng");
			cs.setAge(28);
			cs.setJob("Developer");
			
			session.save(cs);
			tx.commit();
			session.close();			
		} catch (HibernateException e) {
			e.printStackTrace();
		}
	}

}

 

 

Exception总结：

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
org.hibernate.HibernateException: Could not parse configuration: /hibernate.cfg.xml
	at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1494)
	at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
	at org.hibernate.cfg.Configuration.configure(Configuration.java:1414)
	at wei.peng.test.CustomerTest.main(CustomerTest.java:19)
Caused by: org.dom4j.DocumentException: Error on line 2 of document  : The document type declaration for root element type "hibernate" must end with '>'. Nested exception: The document type declaration for root element type "hibernate" must end with '>'.
	at org.dom4j.io.SAXReader.read(SAXReader.java:482)
	at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1484)
	... 3 more

Fuck ***,
拷贝网上的实例，有的家伙，也不知道有没有在直接的机器上跑过
NND，问题就是一些符号Dom4j不能解析，譬如：-    >    <
看上去，都是一样的，没有问题。
解决的办法：
    1、将XML文件在IE浏览器中打开，如果有错误，IE会提示的（相当给力啊）
    2、输入法切换到英文输入状态，IE点到哪里，你就删除IE点到的，再输入一次，就OK了
【我不知道，你们的问题是不是这个，反正我是这么搞定的，希望对你们有帮助】

 

Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/EntityListeners
	at org.hibernate.cfg.annotations.reflection.JPAMetadataProvider.getDefaults(JPAMetadataProvider.java:96)
	at org.hibernate.annotations.common.reflection.java.JavaReflectionManager.getDefaults(JavaReflectionManager.java:226)
	at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1355)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1826)
	at wei.peng.test.CustomerTest.main(CustomerTest.java:19)
Caused by: java.lang.ClassNotFoundException: javax.persistence.EntityListeners
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:303)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:316)
	... 5 more

原因：
    没有引入hibernate-distribution-3.6.0.Final\lib\jpa下面的hibernate-jpa-2.0-api-1.0.0.Final.jar