导包
导包,参考 【XML 方式导包】。
配置
WEB-INF/web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--Struts2 过滤器-->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--Spring 核心监听器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--配置 Spring 配置文件加载路径,默认加载 WEB-INF/applicationContext.xml-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
</web-app>
applicationContext.xml
<?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"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--开启组件扫描-->
<context:component-scan base-package="com.zze"/>
<!--配置 C3P0 数据源-->
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClass}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--Spring 整合 Hibernate-->
<!--引入 Hibernate 配置信息-->
<bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<!-- 注入连接池 -->
<property name="dataSource" ref="dataSource"/>
<!-- 配置Hibernate的相关属性 -->
<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>
<!--配置映射扫描-->
<property name="packagesToScan" value="com.zze.domain"/>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!-- 开启注解事务 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean name="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
</beans>
jdbc.properties
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///test
jdbc.username=root
jdbc.password=root
log4j.properties
### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=c\:mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### set log levels - for more verbose logging change 'info' to 'debug' ###
# error warn info debug trace
log4j.rootLogger= info, stdout
使用注解
使用 Hibernate 实体映射注解
// com.zze.domain.User
package com.zze.domain;
import javax.persistence.*;
@Table(name = "user")
@Entity
public class User {
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@Column(name = "name")
private String name;
@Column(name = "age")
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}
dao 层注入 sessionFactory
// com.zze.dao.impl.BaseDaoImpl
package com.zze.dao.impl;
import com.zze.dao.BaseDao;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import javax.annotation.Resource;
import java.io.Serializable;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
public class BaseDaoImpl<T> extends HibernateDaoSupport implements BaseDao<T> {
/**
* 注入 sessionFactory
*
* @param sessionFactory
*/
@Autowired
private void setSF(SessionFactory sessionFactory) {
super.setSessionFactory(sessionFactory);
}
/*
或
@Resource(name = "hibernateTemplate")
private HibernateTemplate hibernateTemplate;
*/
private Class clazz;
public BaseDaoImpl() {
/*
例: class UserDaoImpl extends BaseDaoImpl<User>
*/
// 获取到运行时实际类 UserDaoImpl
Class<? extends BaseDaoImpl> actualClass = this.getClass();
// 获取到实际类父类 BaseDaoImpl<User>
Type genericSuperclass = actualClass.getGenericSuperclass();
// 转为参数化类型
ParameterizedType type = (ParameterizedType) genericSuperclass;
// 获取类型化参数 User
Type[] actualTypeArguments = type.getActualTypeArguments();
this.clazz = (Class) actualTypeArguments[0];
}
@Override
public void save(T model) {
this.getHibernateTemplate().save(model);
}
@Override
public void update(T model) {
this.getHibernateTemplate().update(model);
}
@Override
public void delete(Serializable id) {
this.getHibernateTemplate().delete(id);
}
@Override
public T findById(Serializable id) {
return (T) this.getHibernateTemplate().get(clazz, id);
}
@Override
public List<T> findAll() {
return (List<T>) this.getHibernateTemplate().find("from " + clazz.getSimpleName());
}
@Override
public Serializable findCount(DetachedCriteria detachedCriteria) {
detachedCriteria.setProjection(Projections.rowCount());
List<Long> list = (List<Long>) this.getHibernateTemplate().findByCriteria(detachedCriteria);
return list.size() > 0 ? list.get(0).intValue() : null;
}
@Override
public List<T> findPage(DetachedCriteria detachedCriteria, Integer begin, Integer pageSize) {
detachedCriteria.setProjection(null);
return (List<T>) this.getHibernateTemplate().findByCriteria(detachedCriteria, begin, pageSize);
}
}
dao 层实例化注解
// com.zze.dao.impl.UserDaoImpl
package com.zze.dao.impl;
import com.zze.dao.UserDao;
import com.zze.domain.User;
import org.springframework.stereotype.Repository;
@Repository("userDao")
public class UserDaoImpl extends BaseDaoImpl<User> implements UserDao {
}
service 层实例化和事务注解
// com.zze.service.impl.UserServiceImpl
package com.zze.service.impl;
import com.zze.dao.UserDao;
import com.zze.domain.User;
import com.zze.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Transactional
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public void save(User user) {
userDao.save(user);
}
}
web 层实例化和 Struts2 配置注解
// com.zze.web.action.UserAction
package com.zze.web.action;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.zze.domain.User;
import com.zze.service.UserService;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.springframework.stereotype.Controller;
@Controller("userAction")
@ParentPackage("struts-default")
@Namespace("/user")
public class UserAction extends ActionSupport implements ModelDriven<User> {
private User user = new User();
@Override
public User getModel() {
return user;
}
private UserService userService;
public void setUserService(UserService userService) {
this.userService = userService;
}
// 访问路径 localhost:8080/user/save
@Action(value = "save",results = {@Result(name = "success",location = "/index.jsp")})
public String save() {
userService.save(user);
return NONE;
}
}
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