Hibernate的二级缓存及jar包导入

测试Hibernate的二级缓存时，当启用二级缓存时，则会抛如下异常：

java.lang.NoClassDefFoundError: Could not initialize class com.hibernate.cache.util.HibernateUtilat com.hibernate.test.CacheTest.testLoad(CacheTest.java:28)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at junit.framework.TestCase.runTest(TestCase.java:164)at junit.framework.TestCase.runBare(TestCase.java:130)at junit.framework.TestResult$1.protect(TestResult.java:106)at junit.framework.TestResult.runProtected(TestResult.java:124)at junit.framework.TestResult.run(TestResult.java:109)at junit.framework.TestCase.run(TestCase.java:120)at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

源码及jar包如下：

1、Student.java

import java.util.Date;public class Student {private int id;private String name;private Date createTime;//缺省get/set方法}

2、Student.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"><hibernate-mapping ><class name="com.hibernate.cache.entity.Student" table="t_student"><!--<cache usage="read-only"/>--><id name="id"><generator class="native"/></id><property name="name"/><property name="createTime"/></class></hibernate-mapping>

3、HibernateUtil.java

import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil {private static SessionFactory sf = null;static{try{//读取hibernate.cfg.xml文件Configuration cfg = new Configuration().configure();//创建SessionFactorysf = cfg.buildSessionFactory();}catch(HibernateException e){e.printStackTrace();}}private HibernateUtil(){}public static SessionFactory getSessionFactory(){return sf;}public static Session getSession(){return sf.openSession();}public static void closeSession(Session session){if(session != null || session.isOpen()){session.close();}}}

4、hibernate.cfg.xml

<!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.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">root</property><property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property><property name="hibernate.show_sql">true</property><!-- 配置缓存提供商 --><property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property><!-- 是否启用二级缓存 --><property name="hibernate.cache.use_second_level_cache">true</property><mapping resource="com/hibernate/cache/entity/Student.hbm.xml"/><!-- 指定student，使用二级缓存 --><class-cache class="com.hibernate.cache.entity.Student" usage="read-only"/></session-factory></hibernate-configuration>

5、CacheTest.java

import junit.framework.TestCase;import org.hibernate.HibernateException;import org.hibernate.Session;import com.hibernate.cache.entity.Student;import com.hibernate.cache.util.HibernateUtil;public class CacheTest extends TestCase {//二级缓存public void testLoad(){Session session = null;try {session = HibernateUtil.getSession();session.beginTransaction();Student stu = (Student)session.load(Student.class, 1);System.out.println(stu.getName());session.getTransaction().commit();} catch (HibernateException e) {session.getTransaction().rollback();e.printStackTrace();} finally {HibernateUtil.closeSession(session);}try {session = HibernateUtil.getSession();session.beginTransaction();Student stu = (Student)session.load(Student.class, 1);System.out.println(stu.getName());session.getTransaction().commit();} catch (HibernateException e) {session.getTransaction().rollback();e.printStackTrace();} finally {HibernateUtil.closeSession(session);}}}

6、ehcache.xml文件与log4j.properties文件是从下载的hibernate-distribution-3.3.2.GA-dist.zip中project\etc\下copy的，放入本地环境的源目录下

jar包列表antlr-2.7.6.jarcommons-collections-3.1.jardom4j-1.6.1.jarjavassist-3.9.0.GA.jarjta-1.1.jarslf4j-api-1.5.8.jarhibernate3.jarmysql-connector-java-5.0.8-bin.jarslf4j-log4j12-1.5.8.jarlog4j-1.2.15.jarehcache-1.2.3.jar

Hibernate的版本为：3.3.2

解决问题的方法：

缺少  commons-logging-1.1.1.jar  jar包所造成的原因。