spring4_Struts2_Hibernate4开发bug日志
BUG1:获取hibernate的session各种异常
在测试中出现bug
public class Test2 {
@Test
public void sessionTest(){
Session session = HibernateSessionFactory.getSession();
System.out.println(session);
}
}
bug信息
现将dom4j-1.6.1.jar拷贝至lib,运行,出现以下bug:
先将jboss-logging-3.1.3.GA.jar,jboss-logging-annotations-1.2.0.Beta1.jar两个包拷贝至lib,出现以下bug:
拷贝jta.jar至lib(在status_hibernate项目中为何不需要此jar?),出现以下异常:
在http://www.cnblogs.com/frank-ming/archive/2013/04/20/3033073.html这位网友的提示下,发现是由hibernate.cfg.xml与News.hbm.xml表头相同引起的:
下面截取一张正确表头的配置与原来我错误的配置进行比较:
正确的表头配置:
我原来错误的表头配置:
可以看出:在正确的表头配置中,hibernate.cfg.xml与News.hbm.xml是不同的。前者是:
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
后者是:
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
将News.hbm.xml修改成正确的表头,就可以了。
现在,在测试类中的sessionTest方法中,可以获取session了。
打印信息:
SessionImpl(PersistenceContext[entityKeys=[],collectionKeys=[]];...
小结:出现以上异常信息的原因有2方面造成:1是缺少jar,2是hibernate的配置文件中表头配置错误。其中漏掉的jar总结如下:
dom4j-1.6.1.jar
jboss-logging-3.1.3.GA.jar,jboss-logging-annotations-1.2.0.Beta1.jar
jta.jar
BUG2:查询News信息列表时,报以下异常:
将antlr-2.7.7.jar加上,好了。
小结:出现以上异常原因在于遗漏一个jar:antlr-2.7.7.jar
将spring与hibernate整合后
BUG3:将spring与hibernate整合后,获取hibernateTemplate出现以下异常:
1.spring.xml配置:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- 引入外部文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- c3p0数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 驱动程序 -->
<property name="driverClass">
<value>${driverName}</value>
</property>
<!-- 连接的url地址 -->
<property name="jdbcUrl">
<value>${url}</value>
</property>
<!-- 连接的用户名 -->
<property name="user">
<value>${userName}</value>
</property>
<!-- 连接的密码 -->
<property name="password">
<value>${passWord}</value>
</property>
<!-- 最大池数 -->
<property name="maxPoolSize">
<value>40</value>
</property>
<!-- 最小池数 -->
<property name="minPoolSize">
<value>10</value>
</property>
<!-- 默认初始化的池数 -->
<property name="initialPoolSize">
<value>10</value>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/chen/vo/News.hbm.xml</value>
</list>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- 开启注解模式 -->
<context:annotation-config/>
<!-- 扫包(使用“注解模式”需要此配置)。服务器在启动时会扫描base-package所指定的包,并将相应的bean注入ApplicationContext容器。 -->
<context:component-scan base-package="com.chen"></context:component-scan>
</beans>
2.测试类测试:
package com.chen.test;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class Spring_HibernateTest {
@Test
public void getHibernateTemplate(){
ApplicationContext applicationContext = new FileSystemXmlApplicationContext("classpath:springTest.xml");
System.out.println(applicationContext.getBean("hibernateTemplate"));
}
}
3.异常信息:
修改加载地址后--ApplicationContext applicationContext = new FileSystemXmlApplicationContext("classpath:spring.xml"); 异常依旧。
查看hibernate包后得知,在hibernate4中的核心包中没有org.hibernate.cache.CacheProvider这个类,而在hibernate3中有。
现在将hibernate4换成hibernate3
删除hibernate4相关的jar:
加上hibernate3jar:
但因为hibernate3的核心包中又缺少HibernateSessionFactory类中的import org.hibernate.service.ServiceRegistry;所以删除HibernateSessionFactory。
运行getHibernateTemplate方法,报以下异常:
加上slf4j-api-1.5.8.jar,slf4j-log4j12-1.5.8.jar,运行,出现以下异常:
加上commons-collections-3.1.jar,运行,正常!
打印信息:
org.springframework.orm.hibernate3.HibernateTemplate@e79f7a
小结:A.出现以上异常的原因在于:1.hibernate4不适合与spring4.0整合,这是因为hibernate4的核心包中缺少相应的类(如CacheProvider),换成hibernate3即可。;2.缺少jar,其中遗漏的jar如下:
slf4j-api-1.5.8.jar,slf4j-log4j12-1.5.8.jar
commons-collections-3.1.jar
B.使用hibernate3后,因为hibernate3缺少相应jar(如ServiceRegistry),所以不能通过ServiceRegistry获取SessionFactory了。--实际上也没必要,因为现在无需通过自己创建的HibernateSessionFactory获取Session了,直接通过spring获取hibernateTemplate即可。
BUG4:将spring与hibernate整合后,运行项目出现以下异常:
spring.xml配置:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- 引入外部文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- c3p0数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 驱动程序 -->
<property name="driverClass">
<value>${driverName}</value>
</property>
<!-- 连接的url地址 -->
<property name="jdbcUrl">
<value>${url}</value>
</property>
<!-- 连接的用户名 -->
<property name="user">
<value>${userName}</value>
</property>
<!-- 连接的密码 -->
<property name="password">
<value>${passWord}</value>
</property>
<!-- 最大池数 -->
<property name="maxPoolSize">
<value>40</value>
</property>
<!-- 最小池数 -->
<property name="minPoolSize">
<value>10</value>
</property>
<!-- 默认初始化的池数 -->
<property name="initialPoolSize">
<value>10</value>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/chen/vo/News.hbm.xml</value>
</list>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="NewsDaoImpl" class="com.chen.dao.NewsDaoImpl">
<property name="hibernateTemplate" ref="hibernateTemplate"></property>
</bean>
<!-- 开启注解模式 -->
<context:annotation-config/>
<!-- 扫包(使用“注解模式”需要此配置)。服务器在启动时会扫描base-package所指定的包,并将相应的bean注入ApplicationContext容器。 -->
<context:component-scan base-package="com.chen"></context:component-scan>
</beans>
配置log4j后,打印异常为userName和passWord无效(java.sql.SQLException: ORA-01017: invalid username/password; logon denied),所以现在将它们改为soctt、root,如下所示:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- 引入外部文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass">
<value>${driverName}</value>
</property>
<property name="jdbcUrl">
<value>${url}</value>
</property>
<property name="user">
<value>scott</value>
</property>
<property name="password">
<value>root</value>
</property>
<property name="maxPoolSize">
<value>40</value>
</property>
<property name="minPoolSize">
<value>10</value>
</property>
<property name="initialPoolSize">
<value>10</value>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/chen/vo/News.hbm.xml</value>
</list>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="newsDaoImpl" class="com.chen.dao.NewsDaoImpl">
<property name="hibernateTemplate" ref="hibernateTemplate"></property>
</bean>
<!-- 开启注解模式 -->
<context:annotation-config/>
<!-- 扫包(使用“注解模式”需要此配置)。服务器在启动时会扫描base-package所指定的包,并将相应的bean注入ApplicationContext容器。 -->
<context:component-scan base-package="com.chen"></context:component-scan>
</beans>
可以成功启动服务器了!(其中原因未可知..)
BUG4.1:此bug源自于BUG4:在spring.xml中无法读取jdbc.properties中的${userName}、${passWord},会报异常:
java.sql.SQLException: ORA-01017: invalid username/password; logon denied
现在,将jdbc.properties中的userName、passWord改一下名字,如下图所示:
driverName=oracle.jdbc.OracleDriver url=jdbc:oracle:thin:@localhost:1521:myorcl name=scott pwd=root
在spring.xml中用EL表达式获取:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass"> <value>${driverName}</value> </property> <property name="jdbcUrl"> <value>${url}</value> </property> <property name="user"> <value>${name}</value> </property> <property name="password"> <value>${pwd}</value> </property> <property name="maxPoolSize"> <value>40</value> </property> <property name="minPoolSize"> <value>10</value> </property> <property name="initialPoolSize"> <value>10</value> </property> </bean>
启动服务器,正常!
小结:推测应该是原来起的名字涉及到关键字或者跟其它什么重名,所以导致其在读取时无效(invalid )。
附:HibernateSessionFactory
package com.oa.utils;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class HibernateSessionFactory {
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
//private static String configfile = "/hibernate.cfg.xml";
private static Configuration configuration = new Configuration().configure();
private static SessionFactory sessionFactory;
static {
try {
StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder();
ServiceRegistry serviceRegistry = serviceRegistryBuilder.applySettings(configuration.getProperties()).build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
} catch (HibernateException e) {
e.printStackTrace();
}
}
private HibernateSessionFactory() {
}
public static Session getSession() {
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) {
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
public static void closeSesssion() {
Session session = threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void setSessionFactory(SessionFactory sessionFactory) {
HibernateSessionFactory.sessionFactory = sessionFactory;
}
public static Configuration getConfiguration() {
return configuration;
}
public static void setConfiguration(Configuration configuration) {
HibernateSessionFactory.configuration = configuration;
}
}