SSH框架整合
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{
@Override
public void savePerson(Person person) {
// TODO Auto-generated method stub
this.getHibernateTemplate().save(person);
}
@Override
public Person getPesonById(Serializable id) {
// TODO Auto-generated method stub
return (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;
}
@Override
public void savePerson(Person person) {
// TODO Auto-generated method stub
this.personDao.savePerson(person);
}
@Override
public Person getPersonByID(Serializable id) {
// TODO Auto-generated method stub
return 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.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://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
ContextLoaderListener
contextInitialized
this.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.xml
this.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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://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;
@Override
public void savePerson(Person person) {
// TODO Auto-generated method stub
this.hibernateTemplate.save(person);
}
@Override
public Person getPesonById(Serializable id) {
// TODO Auto-generated method stub
return (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 stub
this.personDao.savePerson(person);
}
@Override
public Person getPersonByID(Serializable id) {
// TODO Auto-generated method stub
Person 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";
}
}