SSH---整合Struts2&Spring&Hibernate(实例)
2024-08-30 07:27:35
一.SSH回顾
Struts2:核心为过滤器+拦截器。过程：Filter--->FilterDispatcher-->ActionMapper-->ActionProxy-->ActionInvocation-->各种拦截器。
Struts2初用无需过于执著细节，我们只需要知道，它就是用来负责处理请求！在原生Servlet、Serviec、Dao中，它负责Servlet的工作！
Spring:核心为IOC+DI+AOP。原理细节复杂，但道理和目的很明确简单！它的功能就是2个：1）方便地创建对象；2）方便加功能！
Hibernate:核心为通过配置各种映射关系，将Dao层操作，从操作数据库表格转换为操作java对象！它就是封装了JDBC操作数据库那一套操作！
作为初学，必须掌握它们的核心。操作问题必须通过多敲代码熟练并体会。
二、整合Struts2&Spring&Hibernate(实例)
本例目的：用SSH完成往数据库插入数据。
过程说明：在本例当中，用Sturts2的Action类处理请求，调用service处理；在dao层，利用Spring做的 Hibernate模板完成数据库操作；而各个类之间的对象创建，利用Spring的IOC和DI完成，简单来说，就是只在类中声名该对象，创建什么的工作，我们只负责配置即可！
结构说明：本例将源码列出，直接从源码体会，部分代码给出注释。
1 环境准备
jar包：过多，略。后期指望Maven完成
数据库：
CREATE TABLE `bbb` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`category` varchar(100) DEFAULT NULL,
PRIMARY KEY (`id`)
)
2 源码
1）持久类对象：bean对象
package gaga.bean; import javax.persistence.*; /**
* @author Vincent
* @Description:
* @create 2018-02-05 20:15
*/
@Entity
@Table(name = "bbb", schema = "spring")
public class BbbEntity {
@Id
@Column(name = "id")
private int id; @Column(name = "category")
private String category; public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getCategory() {
return category;
} public void setCategory(String category) {
this.category = category;
} @Override
public String toString() {
return "BbbEntity{" +
"id=" + id +
", category='" + category + '\'' +
'}';
}
}
2）Action类
package gaga.test; import com.opensymphony.xwork2.ActionSupport;
import gaga.bean.BbbEntity;
import gaga.service.UserService;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller; import javax.annotation.Resource; /**
* @author Vincent
* @Description:
* @create 2018-02-05 15:18
*/
@Scope("prototype")
@Controller
public class ActionDemo extends ActionSupport { @Resource(name = "us")
private UserService userService; /**
* 在Dao层保存数据，保存对象遗留到dao层直接创建处理
*
* @return
*/
public String save() {
System.out.println("ActionDemo#save......");
userService.save();
return NONE;
} /**
* 懒加载查询数据，条件遗留在dao层处理
*
* @return
*/
public String loadSave() {
System.out.println("Action#loadSave......");
BbbEntity bbbEntity = userService.loadSave();
System.out.println("loadSave result--->" + bbbEntity);
return NONE;
}
}
3）Service接口
package gaga.service; import gaga.bean.BbbEntity; /**
* @author Vincent
* @Description:
* @create 2018-02-05 16:02
*/
public interface UserService {
void save(); BbbEntity loadSave();
}
4）Service接口实现类
package gaga.service.serviceImpl; import gaga.bean.BbbEntity;
import gaga.dao.UserDao;
import gaga.service.UserService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional; import javax.annotation.Resource; /**
* @author Vincent
* @Description:
* @create 2018-02-05 16:03
*/
@Transactional
@Service("us")
public class UserServiceImpl implements UserService { @Resource(name = "userDao")
private UserDao userDao; @Override
public void save() {
System.out.println("UserServiceImpl#save....");
userDao.save(); } @Override
public BbbEntity loadSave() {
return userDao.loadSave();
}
}
5）Dao接口
package gaga.dao; import gaga.bean.BbbEntity; /**
* @author Vincent
* @Description:
* @create 2018-02-05 16:06
*/
public interface UserDao {
void save(); BbbEntity loadSave();
}
6）Dao接口实现类
package gaga.dao.UserDaoImpl; import gaga.bean.BbbEntity;
import gaga.dao.UserDao;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport; /**
* @author Vincent
* @Description:
* @create 2018-02-05 16:09
*/ public class UserDaoImpl extends HibernateDaoSupport implements UserDao { @Override
public void save() {
System.out.println("UserDaoImpl#save....."); BbbEntity user = new BbbEntity();
user.setCategory("eeeeee"); getHibernateTemplate().save(user); } @Override
public BbbEntity loadSave() {
System.out.println("UserDaoImpl#loadSave");
BbbEntity load = getHibernateTemplate().load(BbbEntity.class, 60); return load;
}
}
7）jdbc.properties(抽取出来，方便维护)
driverClass=com.mysql.jdbc.Driver
jdbcUrl=jdbc:mysql:///spring
user=root
password=123
8）log4j.properties(日志处理配置)
##\u8BBE\u7F6E\u65E5\u5FD7\u8BB0\u5F55\u5230\u63A7\u5236\u53F0\u7684\u65B9\u5F0F
log4j.appender.s=org.apache.log4j.ConsoleAppender
log4j.appender.s.Target=System.err
log4j.appender.s.layout=org.apache.log4j.PatternLayout
log4j.appender.s.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n ##\u8BBE\u7F6E\u65E5\u5FD7\u8BB0\u5F55\u5230\u6587\u4EF6\u7684\u65B9\u5F0F
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n ##\u65E5\u5FD7\u8F93\u51FA\u7684\u7EA7\u522B\uFF0C\u4EE5\u53CA\u914D\u7F6E\u8BB0\u5F55\u65B9\u6848
log4j.rootLogger=info, s, file
9）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: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/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd "> <context:component-scan base-package="gaga"/> <bean id="userDao" class="gaga.dao.UserDaoImpl.UserDaoImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property> <!--注解中找映射关系-->
<property name="packagesToScan" value="gaga.bean"/>
</bean> <context:property-placeholder location="classpath:jdbc.properties"/> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driverClass}"/>
<property name="jdbcUrl" value="${jdbcUrl}"/>
<property name="user" value="${user}"/>
<property name="password" value="${password}"/>
</bean> <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean> <tx:annotation-driven transaction-manager="transactionManager"/> </beans>
10）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="struts2" namespace="/" extends="struts-default">
<action name="user_*" class="actionDemo" method="{1}"></action>
</package>
</struts>
11）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_3_1.xsd"
version="3.1">
<listener>
<!--监听项目启动,即初始化applicationContext配置文件-->
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param> <!-- 这个过滤器，必须放在struts的过滤器的前面配置：配置处理懒加载问题 -->
<filter>
<filter-name>openSession</filter-name>
<filter-class>org.springframework.orm.hibernate5.support.OpenSessionInViewFilter</filter-class>
</filter> <filter-mapping>
<filter-name>openSession</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping> <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>
</web-app>
3. 运行结果
访问：http://localhost:8080/user_save
访问成功，数据库插入一条数据
访问：http://localhost:8080/user_loadSave.action.loadSave
访问成功，成功过查出id为64的结果：result--->BbbEntity{id=64, category='eeeeee'}
最新文章
- CentOS 6.5下Redis安装记录
- 自定义BadgeView
- PullToRefreshGridView刷新加载2
- 什么是DMI,SMBIOS,符合SMBIOS规范的计算机的系统信息获取方法
- is not in the sudoers file 问题解决【转载】
- [原] XAF 如何非常容易禁止清除一个下拉字段的值？
- LR性能测试脚本增强与调试
- (转)安装程序发布利器——InstallShield 2011 Limited Edition
- 判断数组中有没有某个键 isset 和 array_key_exists 的效率比较
- HDOJ(HDU) 1985 Conversions(汇率转换)
- EF加载实体的方式
- MPreview.js
- windows7下VirtualBox COM获取对象失败
- Natas Wargame Level27 Writeup（SQL表的注入/溢出与截取）
- Newtonsoft.Json 操作 JSON 字符串
- git查日志命令
- python从入门到实践-9章类
- MySQL5.7 的GTID复制
- windows下KafkaOffsetMonitor下载及安装
- ElasticSearch相关文章推荐