SSH整合开发实例：用户管理系统

本文使用的是Struts2+Hibernate3+Spring3框架整合开发的用户管理系统实例。

1.1数据库层实现

建数据库，名为surra；

建数据表，名为user。其中id设置为自增。

1.2Hibernate持久层设计

1.2.1 创建持久化类：User.java

package com.integration.entity;public class User {private int id;private String name;private String password;private String type;public User() {}public User(int id, String name, String password, String type) {this.id = id;this.name = name;this.password = password;this.type = type;}public int getId() {return this.id;}public void setId(int id) {this.id = id;}public String getName() {return this.name;}public void setName(String name) {this.name = name;}public String getPassword() {return this.password;}public void setPassword(String password) {this.password = password;}public String getType() {return this.type;}public void setType(String type) {this.type = type;}}

1.2.2 创建映射文件：User.hbm.xml

<?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>    <class name="com.integration.entity.User" table="USER">        <id name="id" type="java.lang.Integer">            <column name="ID" precision="22" scale="0" />            <generator class="identity" />        </id>        <property name="name" type="java.lang.String">            <column name="NAME" length="100" not-null="false">                <comment>用户名</comment>            </column>        </property>        <property name="password" type="java.lang.String">            <column name="PASSWORD" length="100" not-null="false">                <comment>密码</comment>            </column>        </property>        <property name="type" type="java.lang.String">            <column name="TYPE" length="500" not-null="false">                <comment>类型</comment>            </column>        </property>    </class></hibernate-mapping>

1.3 DAO层实现

1.3.1Spring管理SessionFactory：applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?><beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">    <!-- 配置SessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource" ><ref local="dataSource"/></property><!-- 配置Hibernate的属性 --><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key="hibernate.show_sql">true</prop></props></property><!-- 指定HIbernate映射文件的路径 --><property name="mappingResources"><list><value>com/integration/entity/User.hbm.xml</value></list></property> </bean> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="driverClassName"><value>com.mysql.jdbc.Driver</value></property><property name="url"><value>jdbc:mysql://localhost:3306/surra</value></property><property name="username"><value>admin</value></property><property name="password"><value>123456</value></property></bean></beans>

1.3.2 创建DAO接口：UserDAO.java

package com.integration.dao;import java.util.List;import com.integration.entity.User;public interface UserDAO { void save(User user); User getUser(String name); void delete(int id); void update(User user); User findById(int id); List<User> findAll();}

1.3.3 创建DAO接口实现类：UserDAOImpl.java

package com.integration.dao;import java.util.List;import com.integration.entity.User;import org.hibernate.Query;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;public class UserDAOImpl extends HibernateDaoSupport implements UserDAO{public void save(User user) {this.getHibernateTemplate().save(user);}public User getUser(String name){String hsql="from User u where u.name='"+name+"'";User result=(User)((Query) this.getHibernateTemplate().find(hsql)).uniqueResult();return result;}public void delete(int id) {this.getHibernateTemplate().delete(findById(id));}public void update(User user){this.getHibernateTemplate().update(user);}public User findById(int id) {User user = (User) this.getHibernateTemplate().get(User.class, id);return user;}@SuppressWarnings("unchecked")public List<User> findAll() {String queryString = "from User";List<User> list =this.getHibernateTemplate().find(queryString);return list;}}

在applicationContext.java中添加如下内容：

<span style="white-space:pre"></span><bean id="userDAO" class="com.integration.dao.UserDAOImpl" abstract="false" lazy-init="default" autowire="default"> <property name="sessionFactory"> <ref bean="sessionFactory" /> </property> </bean>

1.4 业务逻辑层实现

1.4.1 创建业务逻辑组件接口：UserService.java

package com.integration.service;import java.util.List;import com.integration.entity.User;public interface UserService {void saveUser(User user);User getUser(String name);void deleteUser(int id);void updateUser(User user);User findUserById(int id);List<User> findAll();}

1.4.2 创建业务逻辑组件实现类：UserServiceImpl.java

package com.integration.service;import java.util.List;import com.integration.dao.UserDAO;import com.integration.entity.User;public class UserServiceImpl implements UserService {private UserDAO userDAO;public void setUserDAO(UserDAO userDAO){this.userDAO=userDAO;}public void saveUser(User user) {if(userDAO.findById(user.getId())==null)userDAO.save(user);}public User getUser(String name) {return userDAO.getUser(name);}public void deleteUser(int id) {if(userDAO.findById(id)!=null)userDAO.delete(id);}public void updateUser(User user) {if(userDAO.findById(user.getId())!=null)userDAO.update(user);}public User findUserById(int id) {return userDAO.findById(id);}public List<User> findAll() {return userDAO.findAll();}}

在applicationContext.java中进行配置，如下所示：

<span style="white-space:pre"></span><bean id="userService" class="com.integration.service.UserServiceImpl"> <property name="userDAO" ref="userDAO"></property></bean> 

1.5 完成用户登录设计

1.5.1 整合Struts2+Spring：先添加相应的jar包，然后修改web.xml文件

<?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">    <welcome-file-list>    <welcome-file>login.jsp</welcome-file>  </welcome-file-list>    <filter>  <filter-name>struts2</filter-name>  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter>  <filter-mapping>  <filter-name>struts2</filter-name>  <url-pattern>/*</url-pattern> </filter-mapping>  <listener>  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <context-param>    <param-name>contextConfigLocation </param-name>    <param-value>/WEB-INF/classes/applicationContext.xml </param-value></context-param>  </web-app>

1.5.2 创建用户登录Action：LoginAction.java

package com.integration.action;import java.util.Iterator;import java.util.List;import com.integration.service.UserService;import com.integration.entity.User;import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial")public class LoginAction extends ActionSupport {String username;String password;String usertype;public String getUsertype() {return usertype;}public void setUsertype(String usertype) {this.usertype = usertype;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}private UserService userService;public void setUserService(UserService userService) {this.userService = userService;}public String execute(){List<User> list = (List<User>) userService.findAll();User u = new User();Iterator<User> it=list.iterator(); while(it.hasNext()){ u = (User)it.next(); if(username.trim().equals(u.getName())&&password.trim().equals(u.getPassword())&&usertype.trim().equals(u.getType()))  return "success"; else return "failer";} String page = "failer";   return page;}}

1.5.3 用户登录页面：Login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%@ taglib prefix="s" uri="/struts-tags"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>用户登录</title></head><body><s:form action="login" method="post"><s:textfield name="username" label="用户名"></s:textfield><s:password name="password" label="密码"></s:password><s:textfield name="usertype" label="类型"></s:textfield><s:submit value="提交"></s:submit></s:form></body></html>

1.5.4 配置控制器：applicationContext.xml中添加如下内容：

<span style="white-space:pre"></span><bean id="loginAction" class="com.integration.action.LoginAction"> <property name="userService" ref="userService"></property> </bean>

1.5.5 在struts.xml文件中配置loginAction，并定义处理结果与视图资源的关系：struts.xml

<span style="white-space:pre"></span><?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts><constant name="struts.objectFactory" value="spring" /><constant name="struts.enable.DynamicMethodInvocation" value="true" />    <constant name="struts.devMode" value="true" />    <constant name="struts.i18n.reload" value="true" />    <constant name="struts.configuration.xml.reload" value="true" />    <constant name="struts.custom.i18n.resources" value="globalMessages" /><span style="white-space:pre"></span><constant name="struts.url.includeParams" value="none" /><span style="white-space:pre"></span><constant name="struts.ui.theme" value="xhtml"></constant><span style="white-space:pre"></span><package name="struts2" extends="struts-default"><span style="white-space:pre"></span><action name="login" class="loginAction"><span style="white-space:pre"></span><result name="success">/success.jsp</result><span style="white-space:pre"></span><result name="failer">/error.jsp</result><span style="white-space:pre"></span></action><span style="white-space:pre"></span></package></struts>    

以上的代码可以测试用户登录，由于时间限制，剩余的查询用户、添加用户、删除用户、更新用户信息的代码同理可得。