这几天抽着中午的空隙,敲SSH网上商城,刚开始敲的时候,弄SSH的框架花了段时间,框架搭完以后,开始首页跳转,一切都开始步入正轨了。敲了几集视频,感觉SSH网上商城的项目挺好玩的,虽然开始学习的时候不太懂,但是看着功能一个一个的实现,很有成就感。
使用ajax完成用户名是否存在的异步校验:一共分为五个步骤:
1.事件触发:
* 在用户名那添加onblur事件
2.编写AJAX代码:
* 向Action中提交:传递username参数
3.编写Action
* 接收username:模型驱动接收.
* 编写实体类
* User
* User.hbm.xml
* 配置到Spring中.
4.编写DAO
* 继承HibernateDaoSupport
* 在配置中注入sessionFactory
5.编写Service
*注入UserDao
*事务管理
1、在注册页面找到用户名,为用户名添加onblur(鼠标失去焦点)事件
<strong><span style="font-size:18px;"><input type="text" id="username" name="username" class="text" maxlength="20" onblur="checkUsername()"/></span></strong>2、编写AJAX代码:
<strong><span style="font-size:18px;"> function checkUsername(){ // 获得文件框值: var username = document.getElementById("username").value; // 1.创建异步交互对象 var xhr = createXmlHttp(); // 2.设置监听 xhr.onreadystatechange = function(){ if(xhr.readyState == 4){ if(xhr.status == 200){ document.getElementById("span1").innerHTML = xhr.responseText; } } } // 3.打开连接 xhr.open("GET","${pageContext.request.contextPath}/user_findByName.action?time="+new Date().getTime()+"&username="+username,true); // 4.发送 xhr.send(null); } function createXmlHttp(){ var xmlHttp; try{ // Firefox,Opera 8.0+,Safari xmlHttp=new XMLHttpRequest(); } catch (e){ try{// Internet Explorer xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e){ try{ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } catch (e){} } } return xmlHttp; }</span></strong>3.编写Action
在编写action前,需要先创建相应的包和类,要用到的user的包和类,见下图:
userAction:
接收username:模型驱动接收
package cn.itcast.shop.user; import java.io.IOException; import cn.itcast.shop.user.service.UserService; import cn.itcast.shop.user.vo.User; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; /** * 用户模块Action的类 * @author CXC * */ public class UserAction extends ActionSupport implements ModelDriven<User> { //模型驱动要使用的 private User user=new User(); public User getModel(){ return user; } //接受验证码: private String checkcode; public void setCheckcode(String checkcode){ this.checkcode=checkcode; } //注入UserService private UserService userService; public void setUserService(UserService userService) { this.userService = userService; } /** * 跳转到注册页面的执行方法 */ public String registPage() { return "registPage"; } /** * AJAX进行一步校验用户名的执行方法 * @ throws IOException */ public String findByName() throws IOException { // 调用Service进行查询: User existUser = userService.findByUsername(user.getUsername()); // 获得response对象,向页面输出: HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=UTF-8"); // 判断 if (existUser != null) { // 查询到该用户:用户名已经存在 response.getWriter().println("<font color='red'>用户名已经存在</font>"); } else { // 没查询到该用户:用户名可以使用 response.getWriter().println("<font color='green'>用户名可以使用</font>"); } return NONE; } /** * 用户注册的方法: */ public String regist(){ //判断验证码程序 //从session中获得验证码的随机值 String checkcode1=(String)ServletActionContext.getRequest().getSession().getAttribute("checkcode"); if(!checkcode.equalsIgnoreCase(checkcode1)){ this.addActionError("验证码输入错误!"); return "checkcodeFail"; } userService.save(user); this.addActionMessage("注册成功!请去邮箱激活!"); return "msg"; } /** * 用户激活的方法 */ public String active(){ //根据激活码查询用户: User existUser=userService.findByCode(user.getCode()); //判断 if(existUser ==null){ //激活码错误 this.addActionMessage("激活失败:激活码错误!"); }else{ //激活成功 //修改用户的状态 existUser.setState(1); existUser.setCode(null); userService.update(existUser); this.addActionMessage("激活成功,请去登陆!"); } return "msg"; } /** * 跳转到登陆页面 */ public String loginPage(){ return "loginPage"; } /** * 登陆的方法 */ public String login(){ User existUser=userService.login(user); if(existUser==null){ //登陆失败 this.addActionError("登陆失败:用户名或密码错误或用户未激活!"); return LOGIN; }else{ //登陆成功 //将用户的信息存入到session中 ServletActionContext.getRequest().getSession().setAttribute("existUser",existUser); return "loginSuccess"; } } /** * 用户退出的方法 */ public String quit(){ //销毁session ServletActionContext.getRequest().getSession().invalidate(); return "quit"; } }
实体类:编写User的实体类
<strong><span style="font-size:18px;">package cn.itcast.shop.user.vo; /** * 用户名模块实体类: * @author CXC *CREATE TABLE `user` ( `uid` int(11) NOT NULL AUTO_INCREMENT,`username` varchar(255) DEFAULT NULL,`password` varchar(255) DEFAULT NULL,`name` varchar(255) DEFAULT NULL,`email` varchar(255) DEFAULT NULL,`phone` varchar(255) DEFAULT NULL,`addr` varchar(255) DEFAULT NULL,`state` int(11) DEFAULT NULL,`code` varchar(64) DEFAULT NULL,PRIMARY KEY (`uid`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; */ public class User { private Integer uid; private String username; private String password; private String name; private String email; private String phone; private String addr; private Integer state; private String code; public Integer getUid() { return uid; } public void setUid(Integer uid) { this.uid = uid; } 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; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getAddr() { return addr; } public void setAddr(String addr) { this.addr = addr; } public Integer getState() { return state; } public void setState(Integer state) { this.state = state; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } }</span></strong>
在User.hbm.xml中添加映射:
<strong><span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="cn.itcast.shop.user.vo.User" table="user"> <id name="uid"> <generator class="native"/> </id> <property name="username"/> <property name="password"/> <property name="name"/> <property name="email"/> <property name="phone"/> <property name="addr"/> <property name="state"/> <property name="code"/> </class> </hibernate-mapping></span></strong>
配置到Spring中:
4、编写Dao,在这块中UserDao继承HibernateDaoSupport
<strong style="font-family: Arial,Helvetica,sans-serif; font-size: 12px; background-color: rgb(255,255,255);"><span style="font-size:18px;"></span></strong>
<strong><span style="font-size:18px;">package cn.itcast.shop.user.dao;</span></strong>
import java.util.List; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; import cn.itcast.shop.user.vo.User; /* * * 用户模块持久层代码: * @author CXC * */ public class UserDao extends HibernateDaoSupport{ //按照名称查询是否有该用户: public User findByUsername(String username){ String hql = "from User where username = ?"; List<User> list = (List<User>) this.getHibernateTemplate().find(hql,username); if(list != null && list.size() > 0){ return list.get(0); } return null; } //注册用户存入数据库的代码实现 public void save(User user){ this.getHibernateTemplate().save(user); } // 根据激活码查询用户 public User findByCode(String code) { String hql = "from User where code = ?"; List<User> list = (List<User>) this.getHibernateTemplate().find(hql,code); if(list != null && list.size() > 0){ return list.get(0); } return null; } // 修改用户状态的方法 public void update(User existUser) { this.getHibernateTemplate().update(existUser); } //用户登陆的方法 public User login(User user) { // TODO Auto-generated method stub String hql="from User where username= ? and password = ? and state= ?"; List<User> list=(List<User>) this.getHibernateTemplate().find(hql,user.getUsername(),user.getPassword(),1); if (list !=null && list.size()>0){ return list.get(0); } return null; } }
5、编写Service:将配置注入到sessionFactory中
<!-- 配置用户模块的Action --> <action name="user_*" class="userAction" method="{1}"> <result name="registPage">/WEB-INF/jsp/regist.jsp</result>
事务管理:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" 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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 配置连接池: --> <!-- 引入外部属性文件 --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 配置C3P0连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.user}"/> <property name="password" value="${jdbc.password}"/> </bean> <!-- Hibernate的相关信息 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionfactorybean"> <!-- 注入连接池 --> <property name="dataSource" ref="dataSource"/> <!-- 配置Hibernate的其他的属性 --> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MysqLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.connection.autocommit">false</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> <!--配置 hibernate的映射文件 --> <property name="mappingResources"> <list> <value>cn/itcast/shop/user/vo/User.hbm.xml</value> </list> </property> </bean> <!-- 事务管理: --> <!-- 事务管理器 --> <bean id="transactionManager" class ="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <!-- 开启注解事务 --> <tx:annotation-driven transaction-manager="transactionManager"/> <!-- Action的配置 --> <!-- 首页访问的Action --> <bean id="indexAction" class="cn.itcast.shop.index.IndexAction" scope="prototype"> <property name="categoryService" ref="categoryService"/> <property name="productService" ref="productService"/> </bean> <!-- 配置验证码的Action --> <bean id="checkImgAction" class="cn.itcast.shop.user.CheckImgAction" scope="prototype"></bean> <!-- 用户模块的Action --> <bean id='userAction' class="cn.itcast.shop.user.UserAction" scope="prototype"> <!-- 注入Service --> <property name="userService" ref="userService"/> </bean> <!-- Service的配置 --> <bean id='userService' class="cn.itcast.shop.user.service.UserService"> <property name="userDao" ref="userDao"/> </bean> <!-- Dao的配置 --> <bean id='userDao' class="cn.itcast.shop.user.dao.UserDao"> <property name="sessionFactory" ref="sessionFactory"/> </bean> </beans>
总结:
刚开始学习SSH网上商城,接触到了好多东西,SSH(spring structs,hibernate)通过这个项目让我对以后的学习更感兴趣,通过敲这一条线,先来梳理一下简单的逻辑。