SSH整合
struts 控制用的
hibernate 操作数据库的
spring 用解耦的
Struts 、 spring 、 Hibernate 在各层的作用
1 ) struts 负责 web 层 .
ActionFormBean 接收网页中表单提交的数据,然后通过 Action 进行处理,再 Forward 到对应的网页。
在 struts-config.xml 中定义 <action-mapping>, ActionServlet 会加载。
2 ) spring 负责业务层管理,即 Service (或 Manager).
1 . service 为 action 提供统计的调用接口,封装持久层的 DAO.
2 .可以写一些自己的业务方法。
3 .统一的 javabean 管理方法
4 .声明式事务管理
5. 集成 Hiberante
3 ) Hiberante ,负责持久化层,完成数据库的 crud 操作
hibernate 为持久层,提供 OR/Mapping 。
它有一组 .hbm.xml 文件和 POJO, 是跟数据库中的表相对应的。然后定义 DAO ,这些是跟数据库打交道的类,它们会使用 PO 。
在 struts+spring+hibernate 的系统中,
对象的调用流程是: jsp-> Action - > Service ->DAO ->Hibernate 。
数据的流向是 ActionFormBean 接受用户的数据, Action 将数据从 ActionFromBean 中取出,封装成 VO 或 PO,
再调用业务层的 Bean 类,完成各种业务处理后再 forward 。而业务层 Bean 收到这个 PO 对象之后,会调用 DAO 接口方法,进行持久化操作。
spring:Aop管理事务控制,IoC管理各个组件的耦合,DaoTemplate作为常规持久层的快速开发模板!
struts:控制层Action,页面标签和Model数据,调用业务层
Hibernate:负责数据库和对象的映射,负责DAO层(Data Access Object:数据访问)
spring整合hibernate和struts,只要在配好了applicationContext.xml,在struts的action中直接调用就可以了。hibernate访问数据库的操作都在spring中实现了,spring的调用又在stuts的action中实现了。这个ssh框架就连到了一起……
一个简单的SSH例子
配置文件
/SSHLoginDemo/WebRoot/WEB-INF/struts-config.xml
代码 <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"> <struts-config> <data-sources /> <form-beans> <form-bean name="loginForm" type="com.qdu.sun.struts.form.LoginForm" /> </form-beans> <global-exceptions /> <global-forwards /> <action-mappings> <action attribute="loginForm" input="/login.jsp" name="loginForm" path="/login" scope="request" type="org.springframework.web.struts.DelegatingActionProxy"> <forward name="success" path="/success.jsp" /> <forward name="fail" path="/fail.jsp" /> </action> </action-mappings> <message-resources parameter="com.qdu.sun.struts.ApplicationResources" /> <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn"> <set-property property="contextConfigLocation" value="/WEB-INF/classes/applicationContext.xml" /> </plug-in> </struts-config>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources />
<form-beans>
<form-bean name="loginForm"
type="com.qdu.sun.struts.form.LoginForm" />
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings>
<action attribute="loginForm" input="/login.jsp"
name="loginForm" path="/login" scope="request"
type="org.springframework.web.struts.DelegatingActionProxy">
<forward name="success" path="/success.jsp" />
<forward name="fail" path="/fail.jsp" />
</action>
</action-mappings>
<message-resources
parameter="com.qdu.sun.struts.ApplicationResources" />
<plug-in
className="org.springframework.web.struts.ContextLoaderPlugIn">
<set-property property="contextConfigLocation"
value="/WEB-INF/classes/applicationContext.xml" />
</plug-in>
</struts-config>
/SSHLoginDemo/src/applicationContext.xml
代码 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"> <bean id="login" class="com.qdu.sun.BO.LoginBO" /> <bean name="/login" class="com.qdu.sun.struts.action.LoginAction"> <property name="loginBean"> <ref bean="login" /> </property> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml"> </property> </bean> <bean id="UserDAO" class="com.qdu.sun.hibernate.UserDAO"> <property name="sessionFactory"> <ref bean="sessionFactory" /> </property> </bean> </beans>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="login" class="com.qdu.sun.BO.LoginBO" />
<bean name="/login" class="com.qdu.sun.struts.action.LoginAction">
<property name="loginBean">
<ref bean="login" />
</property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation"
value="classpath:hibernate.cfg.xml">
</property>
</bean>
<bean id="UserDAO" class="com.qdu.sun.hibernate.UserDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
</beans>
前端页面
/SSHLoginDemo/WebRoot/login.jsp
代码 <%@ page language="java" pageEncoding="ISO-8859-1"%> <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <html> <head> <title>JSP for LoginForm form</title> </head> <body> <html:form action="/login"> password : <html:password property="password"/><html:errors property="password"/><br/> username : <html:text property="username"/><html:errors property="username"/><br/> <html:submit/><html:cancel/> </html:form> </body> </html>
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<html>
<head>
<title>JSP for LoginForm form</title>
</head>
<body>
<html:form action="/login">
password : <html:password property="password"/><html:errors property="password"/><br/>
username : <html:text property="username"/><html:errors property="username"/><br/>
<html:submit/><html:cancel/>
</html:form>
</body>
</html>
struts
/SSHLoginDemo/src/com/qdu/sun/struts/action/LoginAction.java
代码 /* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.qdu.sun.struts.action; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import com.qdu.sun.BO.LoginBO; import com.qdu.sun.struts.form.LoginForm; /** * MyEclipse Struts * Creation date: 08-26-2008 * * XDoclet definition: * @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true" * @struts.action-forward name="success" path="welcome.jsp" * @struts.action-forward name="fail" path="fail.jsp" */ public class LoginAction extends Action { /* * Generated Methods */ /** * Method execute * @param mapping * @param form * @param request * @param response * @return ActionForward */ private LoginBO loginBean; public LoginBO getLoginBean() { return loginBean; } public void setLoginBean(LoginBO loginBean) { this.loginBean=loginBean; } public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub LoginBO login=getLoginBean(); if(login.validate(loginForm.getUsername(), loginForm.getPassword())) { request.setAttribute("username", loginForm.getUsername()); return mapping.findForward("success"); } else return mapping.findForward("fail"); } }
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.qdu.sun.struts.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.qdu.sun.BO.LoginBO;
import com.qdu.sun.struts.form.LoginForm;
/**
* MyEclipse Struts
* Creation date: 08-26-2008
*
* XDoclet definition:
* @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true"
* @struts.action-forward name="success" path="welcome.jsp"
* @struts.action-forward name="fail" path="fail.jsp"
*/
public class LoginAction extends Action {
/*
* Generated Methods
*/
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
private LoginBO loginBean;
public LoginBO getLoginBean() {
return loginBean;
}
public void setLoginBean(LoginBO loginBean) {
this.loginBean=loginBean;
}
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
LoginBO login=getLoginBean();
if(login.validate(loginForm.getUsername(), loginForm.getPassword()))
{
request.setAttribute("username", loginForm.getUsername());
return mapping.findForward("success");
}
else
return mapping.findForward("fail");
}
}
/SSHLoginDemo/src/com/qdu/sun/struts/form/LoginForm.java
代码 /* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.qdu.sun.struts.form; import javax.servlet.http.HttpServletRequest; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage; /** * MyEclipse Struts * Creation date: 08-26-2008 * * XDoclet definition: * @struts.form name="loginForm" */ public class LoginForm extends ActionForm { /* * Generated fields */ /** password property */ private String password; /** username property */ private String username; /* * Generated Methods */ /** * Method validate * @param mapping * @param request * @return ActionErrors */ public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub ActionErrors errors=new ActionErrors(); if(this.username==null||this.username.length()<1) errors.add("username", new ActionMessage("login.username")); if(this.password==null||this.password.length()<1) errors.add("password", new ActionMessage("login.password")); return errors; } /** * Method reset * @param mapping * @param request */ public void reset(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub this.username=null; this.password=null; } /** * Returns the password. * @return String */ public String getPassword() { return password; } /** * Set the password. * @param password The password to set */ public void setPassword(String password) { this.password = password; } /** * Returns the username. * @return String */ public String getUsername() { return username; } /** * Set the username. * @param username The username to set */ public void setUsername(String username) { this.username = username; } }
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.qdu.sun.struts.form;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
/**
* MyEclipse Struts
* Creation date: 08-26-2008
*
* XDoclet definition:
* @struts.form name="loginForm"
*/
public class LoginForm extends ActionForm {
/*
* Generated fields
*/
/** password property */
private String password;
/** username property */
private String username;
/*
* Generated Methods
*/
/**
* Method validate
* @param mapping
* @param request
* @return ActionErrors
*/
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
// TODO Auto-generated method stub
ActionErrors errors=new ActionErrors();
if(this.username==null||this.username.length()<1)
errors.add("username", new ActionMessage("login.username"));
if(this.password==null||this.password.length()<1)
errors.add("password", new ActionMessage("login.password"));
return errors;
}
/**
* Method reset
* @param mapping
* @param request
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {
// TODO Auto-generated method stub
this.username=null;
this.password=null;
}
/**
* Returns the password.
* @return String
*/
public String getPassword() {
return password;
}
/**
* Set the password.
* @param password The password to set
*/
public void setPassword(String password) {
this.password = password;
}
/**
* Returns the username.
* @return String
*/
public String getUsername() {
return username;
}
/**
* Set the username.
* @param username The username to set
*/
public void setUsername(String username) {
this.username = username;
}
}
spring
/SSHLoginDemo/src/com/qdu/sun/BO/LoginBO.java
代码 package com.qdu.sun.BO; import java.util.List; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.qdu.sun.hibernate.User; import com.qdu.sun.hibernate.UserDAO; public class LoginBO { public boolean validate(String username, String password) { ApplicationContext ctx = new ClassPathXmlApplicationContext( "applicationContext.xml"); UserDAO dao = (UserDAO) ctx.getBean("UserDAO"); User user = new User(); user.setPassword(password); user.setUsername(username); List list = dao.findByExample(user); if (list.size() > 0) { return true; } else { return false; } } }
package com.qdu.sun.BO;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.qdu.sun.hibernate.User;
import com.qdu.sun.hibernate.UserDAO;
public class LoginBO {
public boolean validate(String username, String password) {
ApplicationContext ctx = new ClassPathXmlApplicationContext(
"applicationContext.xml");
UserDAO dao = (UserDAO) ctx.getBean("UserDAO");
User user = new User();
user.setPassword(password);
user.setUsername(username);
List list = dao.findByExample(user);
if (list.size() > 0) {
return true;
} else {
return false;
}
}
}
hibernate
/SSHLoginDemo/src/com/qdu/sun/hibernate/UserDAO.java
代码 package com.qdu.sun.hibernate; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hibernate.LockMode; import org.springframework.context.ApplicationContext; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; /** * A data access object (DAO) providing persistence and search support for User * entities. Transaction control of the save(), update() and delete() operations * can directly support Spring container-managed transactions or they can be * augmented to handle user-managed Spring transactions. Each of these methods * provides additional information for how to configure it for the desired type * of transaction control. * * @see com.qdu.sun.hibernate.User * @author MyEclipse Persistence Tools */ public class UserDAO extends HibernateDaoSupport { private static final Log log = LogFactory.getLog(UserDAO.class); // property constants public static final String USERNAME = "username"; public static final String PASSWORD = "password"; protected void initDao() { // do nothing } public void save(User transientInstance) { log.debug("saving User instance"); try { getHibernateTemplate().save(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } public void delete(User persistentInstance) { log.debug("deleting User instance"); try { getHibernateTemplate().delete(persistentInstance); log.debug("delete successful"); } catch (RuntimeException re) { log.error("delete failed", re); throw re; } } public User findById(java.lang.Integer id) { log.debug("getting User instance with id: " + id); try { User instance = (User) getHibernateTemplate().get( "com.qdu.sun.hibernate.User", id); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } public List findByExample(User instance) { log.debug("finding User instance by example"); try { List results = getHibernateTemplate().findByExample(instance); log.debug("find by example successful, result size: " + results.size()); return results; } catch (RuntimeException re) { log.error("find by example failed", re); throw re; } } public List findByProperty(String propertyName, Object value) { log.debug("finding User instance with property: " + propertyName + ", value: " + value); try { String queryString = "from User as model where model." + propertyName + "= ?"; return getHibernateTemplate().find(queryString, value); } catch (RuntimeException re) { log.error("find by property name failed", re); throw re; } } public List findByUsername(Object username) { return findByProperty(USERNAME, username); } public List findByPassword(Object password) { return findByProperty(PASSWORD, password); } public List findAll() { log.debug("finding all User instances"); try { String queryString = "from User"; return getHibernateTemplate().find(queryString); } catch (RuntimeException re) { log.error("find all failed", re); throw re; } } public User merge(User detachedInstance) { log.debug("merging User instance"); try { User result = (User) getHibernateTemplate().merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public void attachDirty(User instance) { log.debug("attaching dirty User instance"); try { getHibernateTemplate().saveOrUpdate(instance); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public void attachClean(User instance) { log.debug("attaching clean User instance"); try { getHibernateTemplate().lock(instance, LockMode.NONE); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public static UserDAO getFromApplicationContext(ApplicationContext ctx) { return (UserDAO) ctx.getBean("UserDAO"); } }
package com.qdu.sun.hibernate;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
/**
* A data access object (DAO) providing persistence and search support for User
* entities. Transaction control of the save(), update() and delete() operations
* can directly support Spring container-managed transactions or they can be
* augmented to handle user-managed Spring transactions. Each of these methods
* provides additional information for how to configure it for the desired type
* of transaction control.
*
* @see com.qdu.sun.hibernate.User
* @author MyEclipse Persistence Tools
*/
public class UserDAO extends HibernateDaoSupport {
private static final Log log = LogFactory.getLog(UserDAO.class);
// property constants
public static final String USERNAME = "username";
public static final String PASSWORD = "password";
protected void initDao() {
// do nothing
}
public void save(User transientInstance) {
log.debug("saving User instance");
try {
getHibernateTemplate().save(transientInstance);
log.debug("save successful");
} catch (RuntimeException re) {
log.error("save failed", re);
throw re;
}
}
public void delete(User persistentInstance) {
log.debug("deleting User instance");
try {
getHibernateTemplate().delete(persistentInstance);
log.debug("delete successful");
} catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
}
public User findById(java.lang.Integer id) {
log.debug("getting User instance with id: " + id);
try {
User instance = (User) getHibernateTemplate().get(
"com.qdu.sun.hibernate.User", id);
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
public List findByExample(User instance) {
log.debug("finding User instance by example");
try {
List results = getHibernateTemplate().findByExample(instance);
log.debug("find by example successful, result size: "
+ results.size());
return results;
} catch (RuntimeException re) {
log.error("find by example failed", re);
throw re;
}
}
public List findByProperty(String propertyName, Object value) {
log.debug("finding User instance with property: " + propertyName
+ ", value: " + value);
try {
String queryString = "from User as model where model."
+ propertyName + "= ?";
return getHibernateTemplate().find(queryString, value);
} catch (RuntimeException re) {
log.error("find by property name failed", re);
throw re;
}
}
public List findByUsername(Object username) {
return findByProperty(USERNAME, username);
}
public List findByPassword(Object password) {
return findByProperty(PASSWORD, password);
}
public List findAll() {
log.debug("finding all User instances");
try {
String queryString = "from User";
return getHibernateTemplate().find(queryString);
} catch (RuntimeException re) {
log.error("find all failed", re);
throw re;
}
}
public User merge(User detachedInstance) {
log.debug("merging User instance");
try {
User result = (User) getHibernateTemplate().merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public void attachDirty(User instance) {
log.debug("attaching dirty User instance");
try {
getHibernateTemplate().saveOrUpdate(instance);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void attachClean(User instance) {
log.debug("attaching clean User instance");
try {
getHibernateTemplate().lock(instance, LockMode.NONE);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public static UserDAO getFromApplicationContext(ApplicationContext ctx) {
return (UserDAO) ctx.getBean("UserDAO");
}
}