<--------屏蔽F5、Alt＋F4的错-------->

<script>
        function window.onbeforeunload()  {

                if((event.keyCode != 0) && (event.clientX > document.body.clientHeight || event.clientY < 0) || event.altKey)  {

                      alert("That's good.");
                }
        }
</script>

• 允许读取有写锁定或无写锁定的行
• 未应用读锁定
• 无法确保并发事务将不会修改行或回退对行所做的更改

• 只允许读取没有写锁定的行
• 仅为读取当前行获取并保持读锁定，但当游标离开该行时释放读锁定
• 无法确保数据在事务执行过程中不发生更改

• 只允许读取没有写锁定的行
• 读取结果集中的每一行时获取读锁定，并一直保持到事务结束为止

• 只允许读取结果中没有写锁定的行
• 打开游标时获取读锁定，并一直保持到事务结束为止

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "spring" "../../../lib/spring-beans.dtd" >
<beans default-autowire="no" default-dependency-check="none" default-lazy-init="false">

<!-- 
   配置数据源
   注意: 用org.apache.commons.dbcp.BasicDataSource, 要引入 apache commons 
   的commons-collections-3.1.jar, commons-dbcp-1.2.1.jar, commons-pool-1.2.jar三个包
 -->
 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName">
   <value>org.gjt.mm.mysql.Driver</value>
  </property>
  <property name="url">
   <value>jdbc:mysql://localhost/sparkcrm</value>
  </property>
  <property name="username">
   <value>root</value>
  </property>
  <property name="password">
   <value>1111</value>
  </property>
 </bean>

 <!-- 配置sessionFactory, 注意这里引入的包的不同  -->
 <bean id="sessionFactory"
  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource">
   <ref local="dataSource" />
  </property>
  <property name="mappingResources">
   <list>
      <value>com/sparkcrm/schema/entities/Lead.hbm.xml</value>
    </list>
  </property>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">
     org.hibernate.dialect.MySQLDialect
    </prop>
    <prop key="hibernate.show_sql">true</prop>
   </props>
  </property>
 </bean>
 
  <!-- 配置transactionManager, 注意这里引入的包的不同  -->
 <bean id="transactionManager" 
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory">
   <ref local="sessionFactory" />
  </property>
 </bean>

<--事务代理在这里配置, 这里省略了 -->

 <bean id="leadDAO" class="com.sparkcrm.schema.dao.LeadDao">
  <property name="sessionFactory">
   <ref local="sessionFactory" />
  </property>
 </bean>

</beans>

一个示例的hibernate的映射文件

<?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 package="com.sparkcrm.schema.entities">
      
   <!-- 我在这里用了hibernate的动态模型(dynamic models) , 没用pojo-->
    <class entity-name="Lead" table="Lead">
        <id name="id" column="id" type="string">
            <generator class="uuid.hex"/>
        </id>
        <property name="companyName" type="string"/>
        <property name="topic" type="string"/>
        <property name="contactName" type="string"/>
    </class>
</hibernate-mapping>

DAO代码:

import java.util.Map;
/**
   * DAO接口
   */
public interface IDAO {

    String create(Map<String, Object> map);
    
    void update(Map<String, Object> map);
    
    Map<String, Object> delete(String id);
    
    boolean share(String id, String userId, int rights);
    
    boolean assign(String id, String userId);
}


import java.util.Map;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.sparkcrm.schema.IDAO;
import com.sparkcrm.schema.Schema;
import com.sparkcrm.schema.metadata.Lead;
/**
    *一个示例的DAO实现, 继承HibernateDaoSupport, 用spring带来的管理session等的便利
    */
public class LeadDao extends HibernateDaoSupport implements IDAO {

    public String create(Map<String, Object> map) {
        getHibernateTemplate().saveOrUpdate(Schema.LEAD, map);
        return (String) map.get(Lead.ID);
    }

    public void update(Map<String, Object> map) {
        
    }

    public Map<String, Object> delete(String id) {
        return null;
    }

    public boolean share(String id, String userId, int rights) {
        return false;
    }

    public boolean assign(String id, String userId) {
        return false;
    }

}

示意性的测试代码:

import java.sql.Timestamp;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import junit.framework.TestCase;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.sparkcrm.schema.IDAO;

public class testLeadDAO extends TestCase {
    
    ClassPathXmlApplicationContext ctx = null;
    
    public void setUp(){
        ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
    }
    
    public void testCreateLead(){
         IDAO leadDao = (IDAO) ctx.getBean("leadDAO");

        Map<String, Object> map = new HashMap<String, Object>();
        map.put("companyName", "Spark Ltd.");
        map.put("topic", "This is a Good Lead!");
        map.put("contactName", "abcd");
        
        String id = leadDao.create(map);
        System.out.println(id);
    }
}

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import junit.framework.Test;
import junit.framework.TestSuite;

import org.hibernate.EntityMode;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.test.TestCase;

/**
 * @author Gavin King
 */
public class DynamicClassTest extends TestCase {
 
 public DynamicClassTest(String str) {
  super(str);
 }

 protected void configure(Configuration cfg) {
  cfg.setProperty(Environment.DEFAULT_ENTITY_MODE, EntityMode.MAP.toString());
 }

 public void testLazyDynamicClass() {
  Session s = openSession();
  assertTrue( "Incorrectly handled default_entity_mode", s.getEntityMode() == EntityMode.MAP );
  Session other = s.getSession( EntityMode.MAP );
  assertEquals( "openSession() using same entity-mode returned new session", s, other );

  other = s.getSession( EntityMode.POJO );
  other.close();
  assertTrue( !other.isOpen() );
  assertTrue( other.isConnected() );  // because it is linked to the "root" session's connection

  s.close();

  s = openSession();
  Transaction t = s.beginTransaction();

  Map cars = new HashMap();
  cars.put("description", "Cars");
  Map monaro = new HashMap();
  monaro.put("productLine", cars);
  monaro.put("name", "monaro");
  monaro.put("description", "Holden Monaro");
  Map hsv = new HashMap();
  hsv.put("productLine", cars);
  hsv.put("name", "hsv");
  hsv.put("description", "Holden Commodore HSV");
  List models = new ArrayList();
  cars.put("models", models);
  models.add(hsv);
  models.add(monaro);
  s.save("ProductLine", cars);
  t.commit();
  s.close();

  s = openSession();
  t = s.beginTransaction();
  
  cars = (Map) s.createQuery("from ProductLine pl order by pl.description").uniqueResult();
  models = (List) cars.get("models");
  assertFalse( Hibernate.isInitialized(models) );
  assertEquals( models.size(), 2);
  assertTrue( Hibernate.isInitialized(models) );
  
  s.clear();
  
  List list = s.createQuery("from Model m").list();
  for ( Iterator i=list.iterator(); i.hasNext(); ) {
   assertFalse( Hibernate.isInitialized( ( (Map) i.next() ).get("productLine") ) );
  }
  Map model = (Map) list.get(0);
  assertTrue( ( (List) ( (Map) model.get("productLine") ).get("models") ).contains(model) );
  s.clear();
  
  t.commit();
  s.close();

  s = openSession();
  t = s.beginTransaction();
  cars = (Map) s.createQuery("from ProductLine pl order by pl.description").uniqueResult();
  s.delete(cars);
  t.commit();
  s.close();
 }

 protected String[] getMappings() {
  return new String[] { "dynamic/ProductLine.hbm.xml" };
 }

 public static Test suite() {
  return new TestSuite(DynamicClassTest.class);
 }

}

配置文件:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
 "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<!--

  This mapping demonstrates "dynamic" entities.
    
-->

 <class entity-name="ProductLine">

     <id name="id"
      column="productId"
      length="32"
      type="string">
      <generator class="uuid.hex"/>
     </id>

     <property name="description"
      not-null="true"
      length="200"
      type="string"/>

     <!-- don't use sets for associations, unless you want stack overflows! -->
     <!--这一点要特别小心, 我刚开始做试验的时候用的就是Set, 结果抛出 stack overflows异常, 害的我两个小时搞不定, 最后还是看了这个test, 才知道用这样的限制-->
     <bag name="models"
       cascade="all"
       inverse="true">
      <key column="productId"/>
      <one-to-many class="Model"/>
     </bag>

 </class>

    <class entity-name="Model">

     <id name="id"
      column="modelId"
      length="32"
      type="string">
      <generator class="uuid.hex"/>
     </id>
     
     <property name="name"
      not-null="true"
      length="25"
      type="string"/>
      
     <property name="description"
      not-null="true"
      length="200"
      type="string"/>
     
     <many-to-one name="productLine"
      column="productId"
      not-null="true"
      class="ProductLine"/>
     
 </class>

</hibernate-mapping>