SSH架構整合

struts 控制用的

hibernate 操作資料庫的

spring 用解耦的

Struts 、 spring 、 Hibernate 在各層的作用

1 ） struts 負責 web 層 .

ActionFormBean 接收網頁中表單送出的資料，然後通過 Action 進行處理，再 Forward 到對應的網頁。

在 struts-config.xml 中定義 <action-mapping>, ActionServlet 會加載。

2 ） spring 負責業務層管理，即 Service （或 Manager).

1 ． service 為 action 提供統計的調用接口，封裝持久層的 DAO.

2 ．可以寫一些自己的業務方法。

3 ．統一的 javabean 管理方法

4 ．聲明式事務管理

5. 內建 Hiberante

3 ） Hiberante ，負責持久化層，完成資料庫的 crud 操作

hibernate 為持久層，提供 OR/Mapping 。

它有一組 .hbm.xml 檔案和 POJO, 是跟資料庫中的表相對應的。然後定義 DAO ，這些是跟資料庫打交道的類，它們會使用 PO 。

在 struts+spring+hibernate 的系統中，

對象的調用流程是： jsp-> Action － > Service ->DAO ->Hibernate 。

資料的流向是 ActionFormBean 接受使用者的資料， Action 将資料從 ActionFromBean 中取出，封裝成 VO 或 PO,

再調用業務層的 Bean 類，完成各種業務處理後再 forward 。而業務層 Bean 收到這個 PO 對象之後，會調用 DAO 接口方法，進行持久化操作。

spring:Aop管理事務控制,IoC管理各個元件的耦合,DaoTemplate作為正常持久層的快速開發模闆!

struts:控制層Action,頁面标簽和Model資料,調用業務層

Hibernate:負責資料庫和對象的映射,負責DAO層(Data Access Object:資料通路)

spring整合hibernate和struts，隻要在配好了applicationContext.xml,在struts的action中直接調用就可以了。hibernate通路資料庫的操作都在spring中實作了，spring的調用又在stuts的action中實作了。這個ssh架構就連到了一起……

一個簡單的SSH例子

配置檔案

/SSHLoginDemo/WebRoot/WEB-INF/struts-config.xml

代碼

<?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">

</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

<?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">

</property>

</bean>

<bean id="sessionFactory"

class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<property name="configLocation"

value="classpath:hibernate.cfg.xml">

</beans>

前端頁面

/SSHLoginDemo/WebRoot/login.jsp

<%@ 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

* 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

package com.qdu.sun.struts.form;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionMessage;

* @struts.form name="loginForm"

public class LoginForm extends ActionForm {

* Generated fields

/** password property */

private String password;

/** username property */

private String username;

* Method validate

* @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

public void reset(ActionMapping mapping, HttpServletRequest request) {

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.

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

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

package com.qdu.sun.hibernate;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.hibernate.LockMode;

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");

getHibernateTemplate().delete(persistentInstance);

log.debug("delete successful");

log.error("delete failed", re);

public User findById(java.lang.Integer id) {

log.debug("getting User instance with id: " + id);

User instance = (User) getHibernateTemplate().get(

"com.qdu.sun.hibernate.User", id);

return instance;

log.error("get failed", re);

public List findByExample(User instance) {

log.debug("finding User instance by example");

List results = getHibernateTemplate().findByExample(instance);

log.debug("find by example successful, result size: "

+ results.size());

return results;

log.error("find by example failed", re);

public List findByProperty(String propertyName, Object value) {

log.debug("finding User instance with property: " + propertyName

+ ", value: " + value);

String queryString = "from User as model where model."

+ propertyName + "= ?";

return getHibernateTemplate().find(queryString, value);

log.error("find by property name failed", 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");

String queryString = "from User";

return getHibernateTemplate().find(queryString);

log.error("find all failed", re);

public User merge(User detachedInstance) {

log.debug("merging User instance");

User result = (User) getHibernateTemplate().merge(detachedInstance);

log.debug("merge successful");

return result;

log.error("merge failed", re);

public void attachDirty(User instance) {

log.debug("attaching dirty User instance");

getHibernateTemplate().saveOrUpdate(instance);

log.debug("attach successful");

log.error("attach failed", re);

public void attachClean(User instance) {

log.debug("attaching clean User instance");

getHibernateTemplate().lock(instance, LockMode.NONE);

public static UserDAO getFromApplicationContext(ApplicationContext ctx) {

return (UserDAO) ctx.getBean("UserDAO");

本文轉自linzheng 51CTO部落格，原文連結:http://blog.51cto.com/linzheng/1080799

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