ssh框架整合步骤如下
提示：myeclipse环境、工程环境、tomcat环境的jdk保持一致
1、新建一个工程，把工程的编码为utf-8
2、把jsp的编码形式改成utf-8
3、把jar包放入到lib下
4、建立三个src folder
src 存放源代码
config 存放配置文件
hibernate 存放hibernate的配置文件
spring 存放spring的配置文件
struts 存放struts的配置文件
struts.xml
test 存放单元测试
5、在src下建立包
cn.itcast.s2sh.domain
持久化类和映射文件
6、编写dao层和service层
7、写spring的配置文件
1、写sessionFactory
2、测试
3、写dao和service
4、测试
8、写action
9、写spring的配置文件
把action注入到spring容器中
<bean id="personAction" class="cn.itcast.s2sh.struts2.action.sh.PersonAction" scope="prototype">scope为”prototype”保证了action的多实例
10、在web.xml
加入spring的监听器
加入struts2的过滤器
11、请求
详细代码
持久化类与映射文件
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping><!-- 用来描述一个持久化类name 类的全名table 可以不写 默认值和类名一样 catalog 数据库的名称 一般不写--><class name="cn.itcast.s2sh.domain.sh.Person"><!-- 标示属性 和数据库中的主键对应name 属性的名称column 列的名称--><id name="pid" column="pid" length="200" type="java.lang.Long"><!-- 主键的产生器就该告诉hibernate容器用什么样的方式产生主键--><generator class="increment"></generator></id><!-- 描述一般属性--><property name="pname" column="pname" length="20" type="string"></property><property name="psex" column="psex" length="10" type="java.lang.String"></property></class>
</hibernate-mapping>dao
package cn.itcast.s2sh.sh.dao.impl;import java.io.Serializable;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import cn.itcast.s2sh.domain.sh.Person;
import cn.itcast.s2sh.sh.dao.PersonDao;public class PersonDaoImpl extends HibernateDaoSupport implements PersonDao{@Overridepublic void savePerson(Person person) {// TODO Auto-generated method stubthis.getHibernateTemplate().save(person);}@Overridepublic Person getPesonById(Serializable id) {// TODO Auto-generated method stubreturn (Person) this.getHibernateTemplate().load(Person.class, id);}}service
package cn.itcast.s2sh.sh.service.impl;import java.io.Serializable;import cn.itcast.s2sh.domain.sh.Person;
import cn.itcast.s2sh.sh.dao.PersonDao;
import cn.itcast.s2sh.sh.service.PersonService;public class PersonServiceImpl implements PersonService{private PersonDao personDao;public PersonDao getPersonDao() {return personDao;}public void setPersonDao(PersonDao personDao) {this.personDao = personDao;}@Overridepublic void savePerson(Person person) {// TODO Auto-generated method stubthis.personDao.savePerson(person);}@Overridepublic Person getPersonByID(Serializable id) {// TODO Auto-generated method stubreturn this.personDao.getPesonById(id);}
}spring配置文件
applicationcontext.xml
<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:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><import resource="applicationContext-db.xml"/><import resource="applicationContext-person.xml"/>
</beans>applicationContext-db.xml
<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:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><!-- <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="configLocation"><value>classpath:hibernate/hibernate.cfg.xml</value></property></bean>--><bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"><value>classpath:jdbc.properties</value></property></bean><bean id="dataSource" destroy-method="close"class="org.apache.commons.dbcp.BasicDataSource"><property name="driverClassName" value="${jdbc.driverClassName}" /><property name="url" value="${jdbc.url}" /><property name="username" value="${jdbc.username}" /><property name="password" value="${jdbc.password}" /></bean><bean id="sessionFactory"class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource"><ref bean="dataSource" /></property><property name="mappingResources"><!-- list all the annotated PO classes --><list><value>cn/itcast/s2sh/domain/sh/Person.hbm.xml</value></list></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key="hibernate.hbm2ddl.auto">update</prop><prop key="hibernate.show_sql">true</prop><prop key="hibernate.format_sql">true</prop></props></property></bean><bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory"><ref bean="sessionFactory"/></property></bean><tx:advice id="tx" transaction-manager="transactionManager"><tx:attributes><tx:method name="save*" read-only="false"/><tx:method name="update*" read-only="false"/><tx:method name="delete*" read-only="false"/><!-- * 代表了除了上述的三种情况的以外的情况--><tx:method name="*" read-only="true"/></tx:attributes></tx:advice><aop:config><aop:pointcut expression="execution(* cn.itcast.s2sh.sh.service.impl.*.*(..))" id="perform"/><aop:advisor advice-ref="tx" pointcut-ref="perform"/></aop:config>
</beans>applicationContext-person.xml
<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:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><bean id="personDao" class="cn.itcast.s2sh.sh.dao.impl.PersonDaoImpl"><property name="sessionFactory"><ref bean="sessionFactory"/></property></bean><bean id="personService" class="cn.itcast.s2sh.sh.service.impl.PersonServiceImpl"><property name="personDao"><ref bean="personDao"/></property></bean><bean id="personAction" class="cn.itcast.s2sh.struts2.action.sh.PersonAction" scope="prototype"><property name="personService"><ref bean="personService"/></property></bean>
</beans>struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN""http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts><constant name="struts.devMode" value="true"/><include file="struts2/struts-person.xml"></include><!-- <constant name="struts.objectFactory" value="spring" />-->
</struts> struts-person.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN""http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts><package name="person" namespace="/" extends="struts-default"><action name="personAction_*" method="{1}" class="personAction"><result name="index">index.jsp</result></action></package>
</struts> web.xml文件的编写
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><!-- 整合Spring --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring/applicationContext.xml</param-value></context-param><filter><filter-name>OpenSessionInViewFilter</filter-name><filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class></filter><filter-mapping><filter-name>OpenSessionInViewFilter</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><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list>
</web-app>三大框架整合原理
1、三大框架的作用
- struts2是一个mvc框架
- spring容器
1、利用ioc和di做到了完全的面向接口编程
2、由于spring的声明式事务处理，使程序员不再关注事务
3、dao层和service层的类是单例的，但是action层是多例 hibernate
就是一个数据库的ormapping的框架2、整合原理
1、当tomcat启动时，做的事情
1、因为在web.xml中，
<listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring/applicationContext.xml</param-value></context-param><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>所以在启动的时候，执行的是
ContextLoaderListenercontextInitializedthis.contextLoader = createContextLoader();加载spring的配置文件这里有一个固定的参数con的textConfigLocation可以指定classpath路径下的spring的配置文也可以任意位置指定配置文件 spring*.xml WEB-INF/任意多个任意文件夹/spring-*.xml如果没有指定固定参数，则查找默认的加载路径：WEB-INF/applicationContext.xmlthis.contextLoader.initWebApplicationContext(event.getServletContext());启动spring容器总结：当tomcat启动的时候，spring容器就启动了，这个时候service层和dao层所有的单例类就创建对象了struts2容器：加载了default.properties,struts-default.xml,struts-plugin.xml,struts.xml2、请求一个url时，发生的事情：
1、在引入jar包时，导入了struts2-spring-plugin-2.1.8.1.jar包，该jar中有一个文件struts-plugin.xml
<bean type="com.opensymphony.xwork2.ObjectFactory" name="spring" class="org.apache.struts2.spring.StrutsSpringObjectFactory" /><constant name="struts.objectFactory" value="spring" />2、由于上面的配置改变了action的生成方式，action由StrutsSpringObjectFactory生成，经过查找是由SpringObjectFactory中的buidBean方法
生成的
try {o = appContext.getBean(beanName);} catch (NoSuchBeanDefinitionException e) {lass beanClazz = getClassInstance(beanName);o = buildBean(beanClazz, extraContext);}3、由上面的代码可以看出，先从spring容器中查找相应的action,如果没有找到，再根据反射机制创建action,
beanName就是struts配置文件class属性的值，所以class属性的值和spring中ID的值保持一致
openSessionView模式
在web.xml中<filter><filter-name>OpenSessionInViewFilter</filter-name><filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class></filter><filter-mapping><filter-name>OpenSessionInViewFilter</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>OpenSessionInView在第一个位置，struts2的过滤器在第二个位置
1、加入了OpenSessionInView模式解决了懒加载的问题
2、因为延迟了session的关闭时间，所以在session一级缓存中的数据会长时间停留在内存中，
增加了内存的开销
错误
在整合SSH框架的时候出现了很多错误
java.lang.OutOfMemoryError: PermGen space
内存不够，可能是tomcat,或者是myeclipse内存不够的原因
参考链接
Tomcat中JVM内存溢出及合理配置 - ye1992的专栏 - 博客频道 - CSDN.NET
[转]MyEclipse内存不足问题 - - ITeye技术网站
myeclipse修改内存大小不足_百度经验
错误
这个错误很奇怪，困扰很久，原来的那种写法不知道为什么就是不能成功，而且在tomcat8中刷新一下就可以了，但在tomcat7中不行，而且如果tomcat中有了一个新的写法的程序时，原来写法的程序也可以用了，tomcat程序之间可以互相影响吗？？？找到一个最接近的解释，不知道对不对。
参考链接
上网站时输入密码后提示could not open Hibernate Session for transaction；nested exception is_百度知道
注解方式实现整合SSH框架
spring配置文件修改为
<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:tx="http://www.springframework.org/schema/tx"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><!-- <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="configLocation"><value>classpath:hibernate/hibernate.cfg.xml</value></property></bean>--><bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"><value>classpath:jdbc.properties</value></property></bean><bean id="dataSource" destroy-method="close"class="org.apache.commons.dbcp.BasicDataSource"><property name="driverClassName" value="${jdbc.driverClassName}" /><property name="url" value="${jdbc.url}" /><property name="username" value="${jdbc.username}" /><property name="password" value="${jdbc.password}" /></bean><bean id="sessionFactory"class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource"><ref bean="dataSource" /></property><property name="mappingResources"><!-- list all the annotated PO classes --><list><value>cn/itcast/s2sh/domain/sh/Person.hbm.xml</value></list></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key="hibernate.hbm2ddl.auto">update</prop><prop key="hibernate.show_sql">true</prop><prop key="hibernate.format_sql">true</prop></props></property></bean><bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate"><property name="sessionFactory"><ref bean="sessionFactory"/></property></bean><bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory"><ref bean="sessionFactory"/></property></bean><context:component-scan base-package="cn.itcast.s2sh"></context:component-scan><tx:annotation-driven transaction-manager="transactionManager"/></beans>dao
package cn.itcast.s2sh.sh.dao.impl;import java.io.Serializable;import javax.annotation.Resource;import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;import cn.itcast.s2sh.domain.sh.Person;
import cn.itcast.s2sh.sh.dao.PersonDao;@Repository("personDao")
public class PersonDaoImpl implements PersonDao{@Resource(name="hibernateTemplate")private HibernateTemplate hibernateTemplate;@Overridepublic void savePerson(Person person) {// TODO Auto-generated method stubthis.hibernateTemplate.save(person);}@Overridepublic Person getPesonById(Serializable id) {// TODO Auto-generated method stubreturn (Person) this.hibernateTemplate.load(Person.class, id);}}service
package cn.itcast.s2sh.sh.service.impl;import java.io.Serializable;import javax.annotation.Resource;import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;import cn.itcast.s2sh.domain.sh.Person;
import cn.itcast.s2sh.sh.dao.PersonDao;
import cn.itcast.s2sh.sh.service.PersonService;@Service("personService")
public class PersonServiceImpl implements PersonService{@Resource(name="personDao")private PersonDao personDao;@Override@Transactional(readOnly=false)public void savePerson(Person person) {// TODO Auto-generated method stubthis.personDao.savePerson(person);}@Overridepublic Person getPersonByID(Serializable id) {// TODO Auto-generated method stubPerson person = this.personDao.getPesonById(id);return person;}
}action
package cn.itcast.s2sh.struts2.action.sh;import javax.annotation.Resource;import org.apache.struts2.ServletActionContext;
import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;import cn.itcast.s2sh.domain.sh.Person;
import cn.itcast.s2sh.sh.service.PersonService;import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.config.entities.ActionConfig;
import com.opensymphony.xwork2.config.impl.ActionConfigMatcher;@Controller("personAction")
@Scope("prototype")
public class PersonAction extends ActionSupport{@Resource(name="personService")private PersonService personService;public String savePerson(){Person person = new Person();person.setPname("afds");this.personService.savePerson(person);return null;}public String showPerson(){System.out.println("annoation aaaaaaaaaaaaaaaaa");Person person = this.personService.getPersonByID(2L);ServletActionContext.getRequest().setAttribute("person", person);return "index";}
}
