DAO層注入HibernateTemplate的兩種方式
-------------------------siwuxie095
DAO 層注入 HibernateTemplate 的兩種方式
方式一：普通方式
具體實現如下：
（1）編寫頁面
add.jsp：
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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE <html> <head> <metahttp-equiv="Content-Type"content="text/html;
charset=UTF-8"> <title>新增使用者</title> </head> <body> <formaction="${pageContext.request.contextPath }/user_add.action"method="post"> 使用者名稱：<inputtype="text"name="username"/> 地址：<inputtype="text"name="address"/> <inputtype="submit"name="提交"/> </form> </body> </html> |
succ.jsp：
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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE <html> <head> <metahttp-equiv="Content-Type"content="text/html; charset=UTF-8"> <title>新增成功</title> </head> <body> <h1>新增成功！<ahref="${pageContext.request.contextPath
}/add.jsp"> </body> </html> |
（2）編寫實體類
User.java：
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package com.siwuxie095.entity; public class User { Integer uid; String username; String address; public Integer getUid() { return uid; } publicvoid setUid(Integer uid) { this.uid = uid; } public String getUsername() { return username; } publicvoid setUsername(String username) { this.username = username; } public String getAddress() { return address; } publicvoid setAddress(String address) { this.address = address; } @Override public String toString() { return"User [uid=" + uid + ", username=" + username + ", address=" + address + "]"; } } |
（3）在Hibernate 對映配置檔案中進行配置
User.hbm.xml：
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<?xmlversion="1.0"encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" <hibernate-mapping> <classname="com.siwuxie095.entity.User"table="t_user"> <idname="uid"column="uid"> <generatorclass="native"></generator> </id> <propertyname="username"column="username"></property> <propertyname="address"column="address"></property> </class> </hibernate-mapping> |
（4）在Hibernate 核心配置檔案中進行配置
hibernate.cfg.xml：
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<?xmlversion="1.0"encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" <hibernate-configuration> <session-factory> <propertyname="hibernate.show_sql">true</property> <propertyname="hibernate.format_sql">true</property> <!-- 注意：只有配置 hibernate.hbm2ddl.auto 為 update，才能自動建立表 --> <propertyname="hibernate.hbm2ddl.auto">update</property> <propertyname="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <!-- 原來的配置： <property name="hibernate.current_session_context_class">thread</property> 在 SSH 框架整合中會報錯，要麼將這個配置刪了，要麼改成如下配置 參考連結：http://blog.csdn.net/maoyuanming0806/article/details/61417995 --> <propertyname="hibernate.current_session_context_class"> org.springframework.orm.hibernate5.SpringSessionContext </property> <mappingresource="com/siwuxie095/entity/User.hbm.xml"/> </session-factory> </hibernate-configuration> |
（5）編寫Action 類
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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; publicvoid setUserService(UserService userService) { this.userService = userService; } public String add() { userService.add(user); return"add"; } } |
（6）編寫Service 類
UserService.java：
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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; publicvoid setUserDao(UserDao userDao) { this.userDao = userDao; } publicvoid add(User user) { userDao.add(user); } } |
（7）編寫DAO 介面及其實現類
UserDao.java：
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package com.siwuxie095.dao; import com.siwuxie095.entity.User; public interface UserDao { void add(User user); } |
UserDaoImpl.java：
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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; publicvoid setHibernateTemplate(HibernateTemplate hibernateTemplate) { this.hibernateTemplate = hibernateTemplate; } @Override publicvoid add(User user) { hibernateTemplate.save(user); } } |
（8）在Struts2 核心配置檔案中進行配置
struts.xml：
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<?xmlversion="1.0"encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" <struts> <packagename="demo"extends="struts-default"namespace="/"> <actionname="user_*"class="userAction"method="{1}"> <resultname="add">/succ.jsp</result> </action> </package> </struts> |
（9）在Spring 核心配置檔案中進行配置
applicationContext.xml：
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<?xmlversion="1.0"encoding="UTF-8"?> <beansxmlns="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=" <!-- (1) --> <!-- 配置 C3P0 連線池 --> <beanid="dataSource"class="com.mchange.v2.c3p0.ComboPooledDataSource"> <propertyname="driverClass"value="com.mysql.jdbc.Driver"/> <!-- jdbc:mysql:///test_db 是 jdbc:mysql://localhost:3306/test_db 的簡寫 --> <propertyname="jdbcUrl"value="jdbc:mysql:///test_db"/> <propertyname="user"value="root"/> <propertyname="password"value="8888"/> </bean> <!-- SessionFactory 物件的建立交給 Spring 進行管理 --> <beanid="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <!-- 因為在 Hibernate 核心配置檔案中，沒有資料庫配置， 而是在 Spring 的核心配置檔案中進行配置，所以需要 注入 dataSource LocalSessionFactoryBean 中有相關屬性，所以可以 注入 --> <propertyname="dataSource"ref="dataSource"></property> <!-- 指定 Hibernate 核心配置檔案的位置 --> <propertyname="configLocations"value="classpath:hibernate.cfg.xml"></property> </bean> <!-- (2) --> <!-- 配置 Action 物件 --> <beanid="userAction"class="com.siwuxie095.action.UserAction" scope="prototype"> <propertyname="userService"ref="userService"></property> </bean> <!-- 配置 Service 物件 --> <beanid="userService"class="com.siwuxie095.service.UserService"> <propertyname="userDao"ref="userDaoImpl"></property> </bean> <!-- 配置 Dao 實現類物件 --> <beanid="userDaoImpl"class="com.siwuxie095.dao.impl.UserDaoImpl"> <propertyname="hibernateTemplate"ref="hibernateTemplate"></property> </bean> <!-- 配置 HibernateTemplate 物件 --> <beanid="hibernateTemplate"class="org.springframework.orm.hibernate5.HibernateTemplate"> |