标签：持久层 简单 manage filter root session src java let
1.带有hibernate.cfg.xml配置文件（不能加绑定当前线程的配置）
1.编写实体的映射文件（xx.hbm.xml）
<?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> <class name="com.ssh.domain.Customer" table="cst_customer"> <id name="cust_id" column="cust_id"> <generator class="native"/> </id> <property name="cust_name" column="cust_name"/> <property name="cust_user_id" column="cust_user_id"/> <property name="cust_create_id" column="cust_create_id"/> <property name="cust_source" column="cust_source"/> <property name="cust_industry" column="cust_industry"/> <property name="cust_level" column="cust_level"/> <property name="cust_linkman" column="cust_linkman"/> <property name="cust_phone" column="cust_phone"/> <property name="cust_mobile" column="cust_mobile"/> </class> </hibernate-mapping>
2.将配置文件配置到hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- 必须配置 --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql:///SSH</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">toor</property> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <!-- 可选配置 --> <property name="hibernate.show_sql">true</property> <property name="hibernate.format_sql">true</property> <property name="hibernate.hbm2ddl.auto">update</property> <!-- 配置C3P0的连接池 --> <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property> <!-- 映射配置文件 --> <mapping resource="com/ssh/domain/Customer.hbm.xml"/> </session-factory> </hibernate-configuration>
3.在applicationContext.xml中配置hibernate.cfg.xml
<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml"/> </bean>
4.编写DAO层,继承(HibernateDaoSupport)
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao { /** * 保存客户 */ @Override public void save(Customer customer) { System.out.println("持久层：保存客户..."); this.getHibernateTemplate().save(customer); } }
4.1将dao注入service
private CustomerDao customerDao; public void setCustomerDao(CustomerDao customerDao) { this.customerDao = customerDao; }
<bean id="customerService" class="com.ssh.service.CustomerServiceImpl"> <property name="customerDao" ref="customerDao"/> </bean>
5.Spring管理dao
<bean id="customerDao" class="com.ssh.dao.CustomerDaoImpl"> <property name="sessionFactory" ref="sessionFactory"/> </bean>
6.开启事务配置
6.1开启平台事务管理器
<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"/> </bean>
6.2开启注解事务
<tx:annotation-driven transaction-manager="transactionManager"/>
6.3在service类上添加注释
2.不带有hibernate.cfg.xml配置文件
在上面的基础上将hibernate.cfg.xml中的配置转移到applicationContext.xml中
1.配置连接池
<!-- 配置C3P0连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver"/> <property name="jdbcUrl" value="jdbc:mysql:///SSH"/> <property name="user" value="root"/> <property name="password" value="toor"/> </bean>
2.修改LocalSessionFactoryBean
删除：
<property name="configLocation" value="classpath:hibernate.cfg.xml"/>
添加：
<!-- LocalSessionFactoryBean加载配置文件 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <!-- 加载连接池 --> <property name="dataSource" ref="dataSource"/> <!-- 加载方言，加载可选 --> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> <!-- 引入映射的配置文件 --> <property name="mappingResources"> <list> <value>com/ssh/domain/Customer.hbm.xml</value> </list> </property> </bean>
3.删除hibernate.cfg.xml
3.Hibernate模板类的常用方法
1.添加
public void save(Customer customer) { this.getHibernateTemplate().save(customer); }
2.修改
public void update(Customer customer) { this.getHibernateTemplate().update(customer); }
3.删除
public void delete(Customer customer) { this.getHibernateTemplate().delete(customer); }
4.查询一条记录
public Customer get(Customer customer) { return this.getHibernateTemplate().get(Customer.class, customer.getCust_id()); }
5.查询多条记录（HQL方式）
public List<Customer> findAllByHQL() { List<Customer> list = (List<Customer>) this.getHibernateTemplate().find("from Customer"); return list; }
6.查询多条记录（QBC方式）
public List<Customer> findAllByQBC() { DetachedCriteria criteria = DetachedCriteria.forClass(Customer.class); List<Customer> list = (List<Customer>) this.getHibernateTemplate().findByCriteria(criteria); return list; }
4.延迟加载问题
1. 使用延迟加载的时候，再WEB层查询对象的时候程序会抛出异常！
* 原因是延迟加载还没有发生SQL语句，在业务层session对象就已经销毁了，所以查询到的JavaBean对象已经变成了托管态对象！
* 注意：一定要先删除javassist-3.11.0.GA.jar包（jar包冲突了）
2. 解决办法非常简单，Spring框架提供了一个过滤器，让session对象在WEB层就创建，在WEB层销毁。只需要配置该过滤器即可
* 但是：要注意需要在struts2的核心过滤器之前进行配置<filter> <filter-name>OpenSessionInViewFilter</filter-name> <filter-class>org.springframework.orm.hibernate5.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>OpenSessionInViewFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
标签：持久层 简单 manage filter root session src java let
原文地址：http://www.cnblogs.com/NEWHOM/p/6826462.html
