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DAO层注入HibernateTemplate的两种方式

-------------------------siwuxie095

   

   

   

   

   

   

   

   

   

   

DAO 层注入 HibernateTemplate 的两种方式

   

   

方式一:普通方式

   

   

具体实现如下:

   

1)编写页面

   

add.jsp:

   

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>添加用户</title>

</head>

<body>

 

<form action="${pageContext.request.contextPath }/user_add.action" method="post">

用户名:<input type="text" name="username" />

地址:<input type="text" name="address" />

<input type="submit" name="提交" />

</form>

 

</body>

</html>

   

   

   

succ.jsp:

   

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>添加成功</title>

</head>

<body>

 

<h1>添加成功!<a href="${pageContext.request.contextPath }/add.jsp">继续添加</a></h1>

 

</body>

</html>

   

   

   

2)编写实体类

   

User.java:

   

package com.siwuxie095.entity;

   

public class User {

 

Integer uid;

String username;

String address;

 

public Integer getUid() {

return uid;

}

public void setUid(Integer uid) {

this.uid = uid;

}

 

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

 

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

 

@Override

public String toString() {

return "User [uid=" + uid + ", username=" + username +

", address=" + address + "]";

}

 

}

   

   

   

3)在 Hibernate 映射配置文件中进行配置

   

User.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.siwuxie095.entity.User" table="t_user">

 

<id name="uid" column="uid">

<generator class="native"></generator>

</id>

 

<property name="username" column="username"></property>

<property name="address" column="address"></property>

 

</class>

 

</hibernate-mapping>

   

   

   

4)在 Hibernate 核心配置文件中进行配置

   

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>

 

 

<property name="hibernate.show_sql">true</property>

<property name="hibernate.format_sql">true</property>

<!-- 注意:只有配置 hibernate.hbm2ddl.auto update,才能自动创建表 -->

<property name="hibernate.hbm2ddl.auto">update</property>

<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

<!--

原来的配置:

<property name="hibernate.current_session_context_class">thread</property>

 

SSH 框架整合中会报错,要么将这个配置删了,要么改成如下配置

 

参考链接:http://blog.csdn.net/maoyuanming0806/article/details/61417995

-->

<property name="hibernate.current_session_context_class">

org.springframework.orm.hibernate5.SpringSessionContext

</property>

 

 

<mapping resource="com/siwuxie095/entity/User.hbm.xml"/>

 

</session-factory>

</hibernate-configuration>

   

   

   

5)编写 Action 类

   

package com.siwuxie095.action;

   

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

import com.siwuxie095.entity.User;

import com.siwuxie095.service.UserService;

   

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;

}

 

public String add() {

userService.add(user);

return "add";

}

   

}

   

   

   

6)编写 Service 类

   

UserService.java:

   

package com.siwuxie095.service;

   

import org.springframework.transaction.annotation.Transactional;

   

import com.siwuxie095.dao.UserDao;

import com.siwuxie095.entity.User;

   

@Transactional

public class UserService {

 

private UserDao userDao;

 

public void setUserDao(UserDao userDao) {

this.userDao = userDao;

}

   

public void add(User user) {

userDao.add(user);

}

 

}

   

   

   

7)编写 DAO 接口及其实现类

   

UserDao.java:

   

package com.siwuxie095.dao;

   

import com.siwuxie095.entity.User;

   

public interface UserDao {

   

void add(User user);

 

}

   

   

   

UserDaoImpl.java:

   

package com.siwuxie095.dao.impl;

   

import org.springframework.orm.hibernate5.HibernateTemplate;

   

import com.siwuxie095.dao.UserDao;

import com.siwuxie095.entity.User;

   

public class UserDaoImpl implements UserDao {

 

private HibernateTemplate hibernateTemplate;

 

public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {

this.hibernateTemplate = hibernateTemplate;

}

   

@Override

public void add(User user) {

hibernateTemplate.save(user);

}

   

}

   

   

   

8)在 Struts2 核心配置文件中进行配置

   

struts.xml:

   

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

"http://struts.apache.org/dtds/struts-2.3.dtd">

   

<struts>

 

<package name="demo" extends="struts-default" namespace="/">

 

<action name="user_*" class="userAction" method="{1}">

<result name="add">/succ.jsp</result>

</action>

 

</package>

   

</struts>

   

   

   

9)在 Spring 核心配置文件中进行配置

   

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:aop="http://www.springframework.org/schema/aop"

xmlns:context="http://www.springframework.org/schema/context"

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/aop

http://www.springframework.org/schema/aop/spring-aop.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx.xsd">

 

 

<!-- (1) -->

<!-- 配置 C3P0 连接池 -->

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

<property name="driverClass" value="com.mysql.jdbc.Driver"/>

<!--

jdbc:mysql:///test_db jdbc:mysql://localhost:3306/test_db 的简写

-->

<property name="jdbcUrl" value="jdbc:mysql:///test_db"/>

<property name="user" value="root"/>

<property name="password" value="8888"/>

</bean>

 

 

<!-- SessionFactory 对象的创建交给 Spring 进行管理 -->

<bean id="sessionFactory"

class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">

<!--

因为在 Hibernate 核心配置文件中,没有数据库配置,

而是在 Spring 的核心配置文件中进行配置,所以需要

注入 dataSource

LocalSessionFactoryBean 中有相关属性,所以可以

注入

-->

<property name="dataSource" ref="dataSource"></property>

<!-- 指定 Hibernate 核心配置文件的位置 -->

<property name="configLocations" value="classpath:hibernate.cfg.xml"></property>

</bean>

 

 

 

<!-- (2) -->

<!-- 配置 Action 对象 -->

<bean id="userAction" class="com.siwuxie095.action.UserAction" scope="prototype">

<property name="userService" ref="userService"></property>

</bean>

   

<!-- 配置 Service 对象 -->

<bean id="userService" class="com.siwuxie095.service.UserService">

<property name="userDao" ref="userDaoImpl"></property>

</bean>

   

<!-- 配置 Dao 实现类对象 -->

<bean id="userDaoImpl" class="com.siwuxie095.dao.impl.UserDaoImpl">

<property name="hibernateTemplate" ref="hibernateTemplate"></property>

</bean>

   

<!-- 配置 HibernateTemplate 对象 -->

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">

<!-- 注入 SessionFactory 对象 -->

<property name="sessionFactory" ref="sessionFactory"></property>

</bean>

 

 

 

<!-- (3) -->

<!-- 配置事务管理器 HibernateTransactionManager -->

<bean id="transactionManager"

class="org.springframework.orm.hibernate5.HibernateTransactionManager">

<!--注入 SessionFactory 对象 -->

<property name="sessionFactory" ref="sessionFactory"></property>

</bean>

 

<!-- 开启事务注解 -->

<tx:annotation-driven transaction-manager="transactionManager"/>

 

 

</beans>

   

   

   

10)在部署描述文件中进行配置

   

web.xml:

   

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

 

<!-- 配置 Struts2 的核心过滤器 -->

<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>

 

<!-- 配置 Spring 的监听器 ContextLoaderListener -->

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

 

<!-- 配置 Spring 核心配置文件的位置(路径) -->

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:applicationContext.xml</param-value>

</context-param>

 

</web-app>

   

   

   

11)访问路径

   

http://localhost:8080/工程名/add.jsp

   

   

   

   

   

   

   

方式二:让 DAO 接口实现类继承 HibernateDaoSupport 类

   

   

「只有 DAO 接口实现类和 Spring 核心配置文件与方式一不同,其它同上」

   

   

具体实现如下:

   

1)重写 DAO 接口实现类

   

UserDaoImpl.java:

   

package com.siwuxie095.dao.impl;

   

import org.springframework.orm.hibernate5.support.HibernateDaoSupport;

   

import com.siwuxie095.dao.UserDao;

import com.siwuxie095.entity.User;

   

/**

* DAO 接口实现类继承 HibernateDaoSupport 类,直接获取 HibernateTemplate

*/

public class UserDaoImpl extends HibernateDaoSupport implements UserDao {

 

@Override

public void add(User user) {

 

// 直接通过 this 获取 HibernateTemplate,调用 save() 方法保存

this.getHibernateTemplate().save(user);

 

/*

* 此时,也可以获取 SessionFactory

*

* 法一:this.getSessionFactory()

* 法二:this.getHibernateTemplate().getSessionFactory()

*

*

* 此时,也可以获取 Session

*

* 法一:this.getSessionFactory().getCurrentSession()

* 法二:...

*/

}

 

}

   

   

   

2)重写 Spring 核心配置文件

   

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:aop="http://www.springframework.org/schema/aop"

xmlns:context="http://www.springframework.org/schema/context"

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/aop

http://www.springframework.org/schema/aop/spring-aop.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx.xsd">

 

 

<!-- (1) -->

<!-- 配置 C3P0 连接池 -->

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

<property name="driverClass" value="com.mysql.jdbc.Driver"/>

<!--

jdbc:mysql:///test_db jdbc:mysql://localhost:3306/test_db 的简写

-->

<property name="jdbcUrl" value="jdbc:mysql:///test_db"/>

<property name="user" value="root"/>

<property name="password" value="8888"/>

</bean>

 

 

<!-- SessionFactory 对象的创建交给 Spring 进行管理 -->

<bean id="sessionFactory"

class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">

<!--

因为在 Hibernate 核心配置文件中,没有数据库配置,

而是在 Spring 的核心配置文件中进行配置,所以需要

注入 dataSource

LocalSessionFactoryBean 中有相关属性,所以可以

注入

-->

<property name="dataSource" ref="dataSource"></property>

<!-- 指定 Hibernate 核心配置文件的位置 -->

<property name="configLocations" value="classpath:hibernate.cfg.xml"></property>

</bean>

 

 

 

<!-- (2) -->

<!-- 配置 Action 对象 -->

<bean id="userAction" class="com.siwuxie095.action.UserAction" scope="prototype">

<property name="userService" ref="userService"></property>

</bean>

   

<!-- 配置 Service 对象 -->

<bean id="userService" class="com.siwuxie095.service.UserService">

<property name="userDao" ref="userDaoImpl"></property>

</bean>

   

<!-- 配置 Dao 实现类对象 -->

<bean id="userDaoImpl" class="com.siwuxie095.dao.impl.UserDaoImpl">

<!--

注入 SessionFactory 对象

 

此时,这里不再注入 HibernateTemplate,由于 UserDaoImpl 继承了

HibernateDaoSupport,直接注入 SessionFactory 对象,就能获得

HibernateTemplate 对象

-->

<property name="sessionFactory" ref="sessionFactory"></property>

</bean>

   

 

 

<!-- (3) -->

<!-- 配置事务管理器 HibernateTransactionManager -->

<bean id="transactionManager"

class="org.springframework.orm.hibernate5.HibernateTransactionManager">

<!--注入 SessionFactory 对象 -->

<property name="sessionFactory" ref="sessionFactory"></property>

</bean>

 

<!-- 开启事务注解 -->

<tx:annotation-driven transaction-manager="transactionManager"/>

 

 

</beans>

   

   

   

   

   

   

   

   

   

   

   

【made by siwuxie095】

posted on 2017-09-21 21:02  siwuxie095  阅读(495)  评论(0编辑  收藏  举报

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