Struts2和Hibernate实现的注册登录模块

本文是Sruts2初学后的一个小练习，实现了一个简单的注册登录模块的功能。本文可供Struts2初学者的参考，看完本文后你会觉得Struts2比Struts1.x简单易学，容易上手，更为重要的是使得Web开发更加简单了。写到此突然更加的佩服那些架构和开发Struts2的开发人员，以及Apache软件基金组织。

1.开发环境：NeatbBeans 6.5.1 JDK1.6 Tomcat 6 Windows XP Professional SP2 离线博客书写工具：Zoudry Blog Writer

2.首先写一个User类，属性有username和password;原代码如下：

public class User {
private long ID;
private String username;
private String password;

public User(String username,String password){
this.username = username;
this.password = password;
}
public User(){}

public long getID() {
return ID;
}

public void setID(long ID) {
this.ID = ID;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

}

3.配置User类的映射文件：User.hbm.xml

4.写一个Connection类，负责创建Session；

public class Connection {

public static SessionFactory sessionfactory;

static {
try {
Configuration config = new Configuration().configure();
sessionfactory = config.buildSessionFactory();
} catch (Exception e) {
e.printStackTrace();
}
}

public static Session getSession() {
try {
Session session = sessionfactory.openSession();
return session;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}

public static void closeConnection(){
sessionfactory.close();
}
}

5.实现一个UserDAO类，实现具体的数据库操作；

public class UserDAO {

private User user;

public User getUser() {
return user;
}

public void setUser(User user) {
this.user = user;
}

public static boolean Add(User user) {
user.setID(getNextID());
Session session=null;
Transaction tx=null;
try {
session = Connection.getSession();
tx = session.beginTransaction();
session.save(user);
tx.commit();
return true;
} catch (Exception e) {
tx.rollback();
System.out.println("注册失败");
e.printStackTrace();
return false;
}finally{
session.close();
Connection.closeConnection();
}

}

public static boolean registerValidate(String username){
boolean conflict_flag;
Session session = Connection.getSession();
String hql = "select u.username from User u where u.username=?";
Query query = session.createQuery(hql);
query.setString(0, username);
List list = query.list();
if (list.size()>0 ) {
conflict_flag=true;
return conflict_flag;
}else{
conflict_flag = false;
return conflict_flag;
}
}

public static List select(User user){
String sql = "select u from User as u ";
Session session = Connection.getSession();
Query query = session.createQuery(sql);
List list = query.list();
return list;
}

public static boolean loginValidate(String name,String pswd){
Session session = Connection.getSession();
String hql = "select u from User as u where u.username=? and u.password=?";
Query query = session.createQuery(hql);
query.setString(0,name);
query.setString(1,pswd);
List list = query.list();
if (list.size()>0)
return true;
else
return false;

}

public static long getNextID(){
Session session = Connection.getSession();
String sql = "select max(ID) from User";
Query query = session.createQuery(sql);
List list = query.list();
long nextID = list.get(0)+1;
return nextID;
}
}

6.Action类及其数据校验文件：

Login.java 文件如下：

public class Login extends ActionSupport {

String username;
String password;

@Override
public String execute() {
boolean flag = UserDAO.loginValidate(getUsername(), getPassword());
if (flag) {
return SUCCESS;
}
else {
return "error";
}

}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

}

Login-validation.xml文件如下：

"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

请输入你的登录用户名！





请输入有效的用户名，用户名只能是数字和字母，且长度在6-16之间！




请输入你的登录密码





请输入有效的密码，密码只能是数字和字母，且长度在6-16之间！

7.Register类及其数据验证文件：

public class Register extends ActionSupport {

private String username;
private String password;
private String password2;

public String getPassword2() {
return password2;
}

public void setPassword2(String password2) {
this.password2 = password2;
}

@Override
public String execute() throws Exception {
boolean accept = !UserDAO.registerValidate(getUsername());
if (accept) {
User u = new User(getUsername(), getPassword());
boolean flag = UserDAO.Add(u);
if (flag) {
return "success";
} else {
return "error";
}
} else {
return "refuse";
}

}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}
}

Register-validation.xml文件如下：

"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

请输入你要注册的用户名！





请输入有效的用户名，用户名只能是数字和字母，且长度在6-16之间！




请输入你的登录密码






请输入有效的密码，密码只能是数字和字母，且长度在6-16之间！




请再次确认密码

请输入有效的密码，密码只能是数字和字母，且长度在6-16之间！





两次密码不一致

8.login.jsp和register.jsp文件
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>

用户名:
密 码:
  
注册

<%@ page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>

用户名:
密 码:
确认密码：

9.登陆成功以及注册成功的jsp页面；

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>

欢迎你回来，

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
"http://www.w3.org/TR/html4/loose.dtd">

欢迎新用户的加入！

9.登录失败以及注册失败的JSP页面：

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
"http://www.w3.org/TR/html4/loose.dtd">

登录失败，您还不是注册用户！返回注册

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
"http://www.w3.org/TR/html4/loose.dtd">

注册失败，该用户已存在，请重新注册

10:配置Struts.xml文件

demo.xml文件如下：

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">


login.jsp
loginsuccess.jsp
loginerror.jsp



register.jsp
regsuccess.jsp
regerror.jsp
regerror.jsp




11.配置web.xml文件：

struts2
org.apache.struts2.dispatcher.FilterDispatcher


struts2
/*



30



demo/login.jsp

参考来源：http://hiro.iteye.com/blog/420476