hibernate -study

hibernate.cfg.xml配置

<?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> 
            <!-- mysql数据库驱动 --> 
            <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
            <!-- mysql数据库名称 --> 
            <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf-8</property> 
            <!-- 数据库的登陆用户名 --> 
            <property name="hibernate.connection.username">root</property> 
            <!-- 数据库的登陆密码 --> 
            <property name="hibernate.connection.password"></property> 
            <!-- 方言：为每一种数据库提供适配器，方便转换 --> 
            <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
           
            <mapping resource="resources/mapperXML/user.xml"/>
        </session-factory> 
       
    </hibernate-configuration> 

 

mapper配置

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">     <hibernate-mapping>      <class name="practice.entity.User" table="User">          <id name="userid" column="UserId" type="string">              <generator class="uuid"/>          </id>          <property name="username" column="Username" type="string"/>          <property name="birthday" column="Birthday" type="date"/>          <property name="job" column="Job" type="string"/>          <property name="age" column="Age" type="integer"/>      </class>   </hibernate-mapping> 

 

---测试配置

public static void main(String[] args) {
  //加载配置文件
  Configuration cfg=new Configuration().configure();
  //创建sessionFactroy
   SessionFactory sessionFactory = cfg.buildSessionFactory();
   //创建session
   Session session=sessionFactory.openSession();
   //开启事务
   session.beginTransaction();
   User user=new User();
  
   user.setUsername("Test");
   user.setAge(9);
   user.setBirthday(new Date());
   user.setJob("job");
  
   session.save(user);
  
   //提交事务
   session.getTransaction().commit();
   if(session.isOpen()){
    session.close();
   }
  
 }

 

 

 

 

java常见的ClassNotFoundException

1 - java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory    添加包common-logging.jar

2 - java.lang.ClassNotFoundException: javax.transaction.Synchronization      添加包jta.jar(hiberante)

3 - java.lang.ClassNotFoundException: org.dom4j.DocumentException      添加包dom4j-1.6.1.jar

4 - java.lang.ClassNotFoundException: org.apache.commons.collections.SequencedHashMap      添加包commons-collections.jar

5 - java.lang.ClassNotFoundException: net.sf.cglib.proxy.CallbackFilter      java.lang.NoClassDefFoundError: net/sf/cglib/proxy/CallbackFilter      添加包cglib-2.1.3.jar

6 - java.lang.ClassNotFoundException: org.objectweb.asm.Type      添加包asm.jar

7 - java.lang.ClassNotFoundException: antlr.ANTLRException      添加包antlr.jar

8 - java.lang.ClassNotFoundException: net.sf.ehcache.CacheException      添加包ehcache-1.2.3.jar

9-Caused by: java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.<init>(I)V   将cglib.jar 由2.2版本 改为 2.1.