register.jsp
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title>
注册
</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!-- 这事前端验证，后台验证在Regiseter.action中写 -->
<script type="text/javascript">
function checkUser()
{
/* 第一个表单第一个对象-username */
var username = document.forms[0].elements[0].value;
var password = document.forms[0].elements[1].value;
//判断用户名为能为空
if(username=="")
{
alert("用户名不能为空");
return false;
}
//判断用户名第一位不能为数字
if(!isNaN(username.charAt(0)))
{
alert("用户名第一个字符不能为数字");
return false;
}
//判断用户名的长度不能小于4位
if(username.length < 4)
{
alert("用户名不能少于4个字符");
return false;
}
}
//判断密码为能为空
if(password=="")
{
alert("密码不能为空");
return false;
}
//判断密码的长度不能小于6位
if(password.length < 6)
{
alert("密码长度不能小于6位");
return false;
}
</script>
</head>
<body>
<s:property value="message"/>
<a href="index.jsp">返回登录</a>
<hr/>
请您注册:
<!-- 以前action名是Register：加了post -->
<form action="Register.action" onsubmit="return checkUser()" method="post">
用户名: <input type="text" name="username" />
密码: <input type="password" name="password"/>
<input type="submit" value="提交"/>
</form>
<!-- 测试 -->
<%=request.getParameter("username") %>
</body>
</html>
RegisterAction.java
package com.mys.action;
import java.util.List;
import org.apache.commons.lang.StringUtils;//调用了该包的StringUtils类:验证用户名和密码
import org.hibernate.Query;
import org.hibernate.Session;
import com.mys.dao.UserDAO;
import com.mys.domain.*;
import com.mys.util.HibernateUtil;
import com.dao.impl.*;
/**
* 还差个验证文件:最好添个邮箱，以及重复输入密码的功能
* @author Administrator
*
*/
public class RegisterAction {
private String username;
private String password;
private String confirmpassword;
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
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 getConfirmpassword() {
return confirmpassword;
}
public void setConfirmpassword(String confirmpassword) {
this.confirmpassword = confirmpassword;
}
UserDAO userDAO=new UserDAOHibernate();
public String execute() throws Exception{
User user=new User();
user.setUsername(username);
user.setPassword(password);
UserDAOHibernate h=new UserDAOHibernate();
////这个if语句只能判断数据库中是否有该用户
if(userDAO.findByName(username)>0){
message="你好，用户名:"+username+"已经注册,请重新选择用户名!";
return "input";
}
//这个语句是提交事务，录入数据的:实在不行暂时不管
else if(userDAO.save(user)==null){
if(user.getUsername()==null || "".equals(user.getUsername())){
message="用户名不能为空!";
return "input";
}
if(user.getPassword()==null || "".equals(user.getPassword())){
message="密码不能为空!";
return "input";
}
}
具体实现
UserDAOHibernate.java
package com.dao.impl;
/**
* 实现登陆&注册验证
*/
import java.io.File;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Query;
import org.hibernate.Transaction;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.mys.dao.UserDAO;
import com.mys.domain.User;
import com.mys.util.HibernateUtil;
public class UserDAOHibernate implements UserDAO{
private static final Log log = LogFactory.getLog(UserDAOHibernate.class);
private static SessionFactory sessionFactory = null;
private Transaction tx;
private Session session;
static
{
Configuration configuration = new Configuration();
configuration.configure();
sessionFactory = configuration.buildSessionFactory();
}
/*//以前是下边这样
SessionFactory sessionFactory=new Configuration().configure
(new File("D:\\ProgramFiles\\WebProWorkPace\\LRtest\\src\\Hibernate.cfg.xml"))
.buildSessionFactory();*/
//登陆验证
public boolean isValidUser(String username, String password) {
log.debug("in UserDAO IsValid");
try {
Session session = sessionFactory.openSession();
String hql = "from User as u where u.username=? and u.password=?";
Query query = session.createQuery(hql);
query.setString(0, username);
query.setString(1, password);
List userList = query.list();
if (userList.size() > 0) {
session.close();
return true;
}
session.close();
return false;
} catch (RuntimeException e) {
log.error("isValidUser failed", e);
throw e;
}
}
//注册验证!
public User save(User transientInstance) {
log.debug("saving user instance");
Session session = sessionFactory.openSession();
Transaction tran = session.beginTransaction();
/*已有该用户*/
try {
if (findByName(transientInstance.getUsername()) > 0) {
return null;
}
/* 没有该用户，录入数据库*/
session.save(transientInstance);
session.flush();
tran.commit();
log.debug("save successful");
session.close();
return transientInstance;
} catch (RuntimeException e) {
tran.rollback();
log.error("save failed", e);
throw e;
}
}
//注册验证
public int findByName(String username) {
Session session = sessionFactory.openSession();
String hql = "from User as u where u.username=?";
Query query = session.createQuery(hql);
query.setParameter(0, username);
List userlist = query.list();
if (userlist.size() > 0) {
return 1;
}
return 0;
}
}
------解决思路----------------------
给username的input加个ID
if($('#username').val() == "" ){
alert('用户名不能为空!');
return;
}
------解决思路----------------------
if(!password)就可以
------解决思路----------------------
得使用ajax，异步去后台请求验证
参考 http://blog.csdn.net/magi1201/article/details/44569657 用户名是否重复校验
------解决思路----------------------
if(userDAO.findByName(username)>0){
message="你好，用户名:"+username+"已经注册,请重新选择用户名!";
return "input";
}
//这个语句是提交事务，录入数据的:实在不行暂时不管
else if(userDAO.save(user)==null){
if(user.getUsername()==null
------解决思路----------------------
"".equals(user.getUsername())){
message="用户名不能为空!";
return "input";
}
if(user.getPassword()==null
------解决思路----------------------
"".equals(user.getPassword())){
message="密码不能为空!";
return "input";
}
}
这个逻辑都有点问题啊！你在else if 的判断中已经执行了save操作了！
建议改成这样：
if(user.getUsername()==null
------解决思路----------------------
"".equals(user.getUsername())){
message="用户名不能为空!";
return "input";
}
if(user.getPassword()==null
------解决思路----------------------
"".equals(user.getPassword())){
message="密码不能为空!";
return "input";
}
if(userDAO.findByName(username)>0){
message="你好，用户名:"+username+"已经注册,请重新选择用户名!";
return "input";
}
//这个语句是提交事务，录入数据的:实在不行暂时不管
else if(userDAO.save(user)==null){
return "input";
}
return "success";