简单的SSH登录功能实现

工程目录

配置文件详解

Spring的applicationContext.xml文件

<span style="font-family:SimSun;"><?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:p="http://www.springframework.org/schema/p"      xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:context="http://www.springframework.org/schema/context"      xmlns:jee="http://www.springframework.org/schema/jee"      xmlns:tx="http://www.springframework.org/schema/tx"      xsi:schemaLocation="            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd          http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd          http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd          http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">          <!-- 定义数据源 -->    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <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>    <context:property-placeholder location="classpath:jdbc.properties"/>        <!-- 配置HibernateSessionFactory工厂 -->      <bean id="sessionFactory"          class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">          <property name="dataSource" ref="dataSource"></property>          <property name="configLocation" value="classpath:hibernate.cfg.xml"/>          <!-- 自动扫描注解方式配置的hibernate类文件 -->          <property name="packagesToScan">              <list>                <value>com.tonly.entity</value>              </list>          </property>      </bean>        <!-- 配置Hibernate事务管理器 -->      <bean id="transactionManager"          class="org.springframework.orm.hibernate4.HibernateTransactionManager">          <property name="sessionFactory" ref="sessionFactory" />      </bean>        <!-- 配置事务传播特性 -->      <tx:advice id="txAdvice" transaction-manager="transactionManager">          <tx:attributes>              <tx:method name="insert*" propagation="REQUIRED" />              <tx:method name="update*" propagation="REQUIRED" />              <tx:method name="edit*" propagation="REQUIRED" />              <tx:method name="save*" propagation="REQUIRED" />              <tx:method name="add*" propagation="REQUIRED" />              <tx:method name="new*" propagation="REQUIRED" />              <tx:method name="set*" propagation="REQUIRED" />              <tx:method name="remove*" propagation="REQUIRED" />              <tx:method name="delete*" propagation="REQUIRED" />              <tx:method name="change*" propagation="REQUIRED" />              <tx:method name="get*" propagation="REQUIRED" read-only="true" />              <tx:method name="find*" propagation="REQUIRED" read-only="true" />              <tx:method name="load*" propagation="REQUIRED" read-only="true" />              <tx:method name="*" propagation="REQUIRED" read-only="true" />          </tx:attributes>      </tx:advice>        <!--  配置参与事务的类 -->    <aop:config>        <aop:pointcut id="serviceOperation" expression="execution(* com.tonly.service.*.*(..))" />              <!-- 切面事务归txAdvice处理，把上面我们所配置的事务管理两部分属性整合起来 -->        <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation" />    </aop:config>      <!-- 自动加载构建JavaBean，直接使用注解的话可以免去配置bean的麻烦，实体类可以被自动扫描 -->      <context:component-scan base-package="com.tonly" />   </beans>  </span>

Hibernate.cfg.xml文件配置

<span style="font-family:SimSun;"><?xml version='1.0' encoding='UTF-8'?>  <!DOCTYPE hibernate-configuration PUBLIC           "-//Hibernate/Hibernate Configuration DTD 3.0//EN"      "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">    <hibernate-configuration>     <session-factory>        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>          <property name="show_sql">true</property>        <property name="hbm2ddl.auto">update</property>    </session-factory>  </hibernate-configuration></span>

jdbc.properties文件配置

jdbc.driverClassName=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:3306/db_teststudiojdbc.username=rootjdbc.password=123

struts.xml文件配置

<?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE struts PUBLIC      "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"      "http://struts.apache.org/dtds/struts-2.3.dtd">       <struts>      <constant name="struts.action.extension" value="action" />    <constant name="struts.i18n.encoding" value="utf-8"></constant>    <constant name="struts.multipart.maxSize" value="10000000"/>  <!-- 大约10M -->        <package name="ebuy" namespace="/" extends="struts-default">    <action name="user_*" method="{1}" class="com.tonly.action.UserAction"><result name="error">login.jsp</result><result name="loginSuccess">main.jsp</result></action>    </package>    </struts>   

login.jsp文件，主要实现登录（输入用户名、密码）、记住密码功能，比较简单，前台jsp页面使用bootstrap框架，界面效果如下：

用户名或密码为空：

用户名或密码不正确：

登录成功，直接跳到main.jsp页面：

前台login.jsp文件详细如下：

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8"%><%@ page import="com.tonly.entity.User"%><%if(request.getAttribute("user") == null){//说明是用户首次登录，而非服务端跳转，这时候再在cookies中进行取值操作String userName = null;String password = null;Cookie[] cookies = request.getCookies();for(int i=0; cookies!=null && i<cookies.length; i++){if(cookies[i].getName().equals("user")){userName = cookies[i].getValue().split("-")[0];password = cookies[i].getValue().split("-")[1];}}if(userName == null)userName = "";if(password == null)password = "";pageContext.setAttribute("user", new User(userName, password));//EL表达式取值范围为page request session application}%><html lang="zh"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>DQA - Test Studio</title><linkhref="${pageContext.request.contextPath}/bootstrap/css/bootstrap.css"rel="stylesheet"><linkhref="${pageContext.request.contextPath}/bootstrap/css/bootstrap-responsive.css"rel="stylesheet"><script src="${pageContext.request.contextPath}/bootstrap/js/jquery.js"></script><scriptsrc="${pageContext.request.contextPath}/bootstrap/js/bootstrap.js"></script><style type="text/css">body {padding-top: 10px;padding-bottom: 40px;background-color: #D6D6D6;}.form-signin-heading {text-align: center;padding-bottom: 10;}.head{width:100%;height:200px;}.form-signin {max-width: 390px;padding: 19px 29px 0px;margin: 0 auto 20px;background-color: #fff;border: 1px solid #e5e5e5;-webkit-border-radius: 5px;-moz-border-radius: 5px;border-radius: 5px;-webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .05);-moz-box-shadow: 1 1px 2px rgba(0, 0, 0, .05);box-shadow: 0 1px 2px rgba(0, 0, 0, .05);}.form-signin .form-signin-heading,.form-signin .checkbox {margin-bottom: 10px;}.form-signin input[type="text"],.form-signin input[type="password"] {font-size: 12px;height: 13px;margin-bottom: 15px;padding: 7px 9px;width:100%;}</style><script type="text/javascript">function resetForm(){$("#userName").val("");$("#password").val("");}function checkForm(){var userName = $("#userName").val();var password = $("#password").val();if(userName == ""){$("#error").html("Please enter username");return false;}if(password == ""){$("#error").html("Please enter password");return false;}return true;}</script></head><body><div id="head" class="head"><div style="height:25px;padding:3 auto;margin:3 auto;"><font size=6 color="#E50914"> </font></div><div style="height:35px;background-color: #E1E1E1"><hr size=12 color=#E50914 width=100%></div></div><div class="container"><form name="myForm" class="form-signin" action="user_login.action" method="post" onsubmit="return checkForm()"><h2 class="form-signin-heading">Welcome to Test Studio</h2><input id="userName" name="user.userName" type="text"value="${user.userName }" class="input-block-level"placeholder="Username"> <input id="password" name="user.password"type="password" value="${user.password }" class="input-block-level"placeholder="Password"> <label class="checkbox"> <inputid="remember" name="remember" type="checkbox" value="remember-me">Remember me     <font id="error" color="red">${error}</font></label><div style="margin:0px auto;" align="center"><button class="btn btn-default btn-primary" type="submit">Login</button>    <button class="btn btn-default btn-primary" type="button" onclick="javascript:resetForm()">Reset</button></div><br></form></div></body></html>

详细代码实现：

首先是service服务层，结构如下：

其中UserServiceImpl的具体实现如下：

package com.tonly.service.impl;import java.util.LinkedList;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Service;import com.tonly.dao.BaseDao;import com.tonly.entity.PageBean;import com.tonly.entity.User;import com.tonly.service.UserService;import com.tonly.util.StringUtil;@Service("userService")public class UserServiceImpl implements UserService {@Resourceprivate BaseDao<User> baseDao;@Overridepublic User login(User user) {List<Object> param = new LinkedList<Object>();StringBuffer hql = new StringBuffer("from User u where u.userName = ? and u.password = ?");if (user != null) {param.add(user.getUserName());param.add(user.getPassword());return baseDao.get(hql.toString(), param);}else {return null;}}}

通过@Service("userService")注解声明一个服务bean，通过@Resource注入baseDao这个bean，BaseDao的实现结构如图：

其中BaseDaoImpl的具体实现如下：

package com.tonly.dao.impl;import java.io.Serializable;import java.util.List;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import com.tonly.dao.BaseDao;import com.tonly.entity.PageBean;@Repository("baseDao")@SuppressWarnings("all")public class BaseDaoImpl<T> implements BaseDao<T> {private SessionFactory sessionFactory;public SessionFactory getSessionFactory() {return sessionFactory;}@Autowiredpublic void setSessionFactory(SessionFactory sessionFactory) {this.sessionFactory = sessionFactory;}private Session getCurrentSession() {return sessionFactory.getCurrentSession();}public T get(Class<T> c, Serializable id) {return (T) this.getCurrentSession().get(c, id);}}

BaseDaoImpl中使用了泛型注入，这样在service层可以直接通过注入basedao并传递一个类型对象的方法实现basedao中方法的继承。再来看看UserServiceImpl的具体实现：

package com.tonly.service.impl;import java.util.LinkedList;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Service;import com.tonly.dao.BaseDao;import com.tonly.entity.PageBean;import com.tonly.entity.User;import com.tonly.service.UserService;import com.tonly.util.StringUtil;@Service("userService")public class UserServiceImpl implements UserService {@Resourceprivate BaseDao<User> baseDao;@Overridepublic User login(User user) {List<Object> param = new LinkedList<Object>();StringBuffer hql = new StringBuffer("from User u where u.userName = ? and u.password = ?");if (user != null) {param.add(user.getUserName());param.add(user.getPassword());return baseDao.get(hql.toString(), param);}else {return null;}}}

这里直接通过@Resource注入baseDao并传递泛型参数"User"，这样可以直接使用baseDao.get(hql.toString(), param)方法获取对象。

最后记录下UserAction的具体实现：

package com.tonly.action;import javax.annotation.Resource;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.apache.struts2.ServletActionContext;import org.apache.struts2.interceptor.ServletRequestAware;import org.springframework.stereotype.Controller;import com.opensymphony.xwork2.ActionSupport;import com.tonly.entity.User;import com.tonly.service.UserService;@Controllerpublic class UserAction extends ActionSupport implements ServletRequestAware{/** *  */private static final long serialVersionUID = 1L;private HttpServletRequest request;@Overridepublic void setServletRequest(HttpServletRequest request) {this.request = request;}@Resourceprivate UserService userService;private String error;private User user;private String remember;public String getRemember() {return remember;}public void setRemember(String remember) {this.remember = remember;}public User getUser() {return user;}public void setUser(User user) {this.user = user;}public String getError() {return error;}public void setError(String error) {this.error = error;}public String login() throws Exception{HttpSession session = request.getSession();User currentUser = userService.login(user);if (currentUser == null) {request.setAttribute("user",user);error = "incorrect username or password";return ERROR;}else {if ("remember-me".equals(remember)) {remember(currentUser, ServletActionContext.getResponse());}session.setAttribute("currentUser", currentUser);return "loginSuccess";}}private void remember(User user, HttpServletResponse response) throws Exception{Cookie cookie = new Cookie("user", user.getUserName()+"-"+user.getPassword());cookie.setMaxAge(1*60*60*24*7);//设置有效期一周response.addCookie(cookie);}}

实体User类具体代码如下：

package com.tonly.entity;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;import org.hibernate.annotations.GenericGenerator;@Entity@Table(name="t_user")public class User {private int id;private String userName;private String password;private String sex;private String email;private String mobile;private String address;private int status = 1; //普通用户为1，管理员为2public User() {super();}public User(String userName, String password) {super();this.userName = userName;this.password = password;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public String getMobile() {return mobile;}public void setMobile(String mobile) {this.mobile = mobile;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public int getStatus() {return status;}public void setStatus(int status) {this.status = status;}@Id@GeneratedValue(generator="_native")@GenericGenerator(name="_native",strategy="native")public int getId() {return id;}public void setId(int id) {this.id = id;}@Column(length=20)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;}}

整个业务逻辑是：

前台login.jsp登录请求user_login.action，通过struts的OGNL方式直接将userName、password自动封装到后台action中的User对象，登录操作之后返回一个currentUser对象（用户名或密码不正确则对象为空），如果为空，则将当前User对象（前台传过来的错误User对象）置于request范围中，这样可以直接在前台通过value="${user.userName}或password="${user.password}""的方式直接回显数值。如果登录成功则再判断有没有勾选"Remember me"，如果勾选则表示要求记住密码，则将当前登录成功的currentUser对象置入cookie中，这样前台脚本中可以通过判断再次取值的方式实现记住密码。