用戶登陸：
分析：
編寫代碼：
1.編寫web層 創建UserAction
package cn.itheima.web.action;
import java.util.Map;
import javax.servlet.http.HttpSession;
import org.apache.struts2.ServletActionContext;
import org.hibernate.criterion.DetachedCriteria;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import cn.itheima.domain.User;
import cn.itheima.service.UserService;
import cn.itheima.service.impl.UserServiceImpl;
public class UserAction extends ActionSupport implements ModelDriven<User> {
private UserService us = new UserServiceImpl();
private User user = new User();
public String login() throws Exception {
// 1調用service，傳遞參數 獲取User對象
User u = us.login(user);
// 2把User對象存到session域
ActionContext.getContext().getSession().put("User", u);
return "toHome";
}
public User getModel() {
return user;
}
}
<?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>
<!-- 指定struts2是否以開發模式運行
1.熱加載主配置.(不需要重啓即可生效)
2.提供更多錯誤信息輸出,方便開發時的調試
-->
<constant name="struts.devMode" value="true"></constant>
<package name="crm" namespace="/" extends="struts-default" >
<global-exception-mappings>
<!-- 如果出現java.lang.RuntimeException異常,就將跳轉到名爲error的結果 -->
<exception-mapping result="error" exception="java.lang.RuntimeException"></exception-mapping>
</global-exception-mappings>
<action name="CustomerAction_*" class="cn.itheima.web.action.CustomerAction" method="{1}" >
<result name="list" >/jsp/customer/list.jsp</result>
<result name="toList" type="redirectAction">
<param name="actionName">CustomerAction_list</param>
<param name="namespace">/</param>
</result>
</action>
<action name="UserAction_*" class="cn.itheima.web.action.UserAction" method="{1}" >
<result name="toHome" type="redirect">/index.htm</result>
<result name="error" >/login.jsp</result>
</action>
</package>
</struts>package cn.itheima.service.impl;
import org.hibernate.Hibernate;
import cn.itheima.dao.UserDao;
import cn.itheima.dao.impl.UserDaoImpl;
import cn.itheima.domain.User;
import cn.itheima.service.UserService;
import cn.itheima.utils.HibernateUtils;
public class UserServiceImpl implements UserService {
private UserDao ud = new UserDaoImpl();
@Override
public User login(User user) {
//打開事務
HibernateUtils.getCurrentSession().beginTransaction();
//1.調用Dao根據登陸名稱查詢User對象
User existU = ud .getByUserCode(user.getUser_code());
//提交事務
HibernateUtils.getCurrentSession().getTransaction().commit();
if(existU==null){
//獲得不到=>拋出異常提示用戶名不存在
throw new RuntimeException("用戶名不存在!");
}
//2 比對密碼是否一致
if(!existU.getUser_password().equals(user.getUser_password())){
//不一致=>拋出異常提示密碼錯誤
throw new RuntimeException("密碼錯誤!");
}
//3 將數據庫查詢的User返回
return existU;
}
}
package cn.itheima.dao.impl;
import org.hibernate.Query;
import org.hibernate.Session;
import cn.itheima.dao.UserDao;
import cn.itheima.domain.User;
import cn.itheima.utils.HibernateUtils;
public class UserDaoImpl implements UserDao {
//根據用戶名獲取User
public User getByUserCode(String user_code) {
//HQL查詢
//1獲取session
Session session = HibernateUtils.getCurrentSession();
//2創建HQl語句
String hql ="from User where user_code = :user_code ";
//3創建查詢對象
Query query = session.createQuery(hql);
//4設置參數
query.setParameter("user_code", user_code);
//5執行查詢
return (User) query.uniqueResult();
}
}<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!-- 導入struts2標籤庫 -->
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/frameset.dtd">
<HTML xmlns="http://www.w3.org/1999/xhtml">
<HEAD>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
<STYLE type=text/css>
BODY {
FONT-SIZE: 12px; COLOR: #ffffff; FONT-FAMILY: 宋體
}
TD {
FONT-SIZE: 12px; COLOR: #ffffff; FONT-FAMILY: 宋體
}
</STYLE>
<META content="MSHTML 6.00.6000.16809" name=GENERATOR></HEAD>
<BODY>
<FORM id=form1 name=form1 action="${pageContext.request.contextPath}/UserAction_login" method=post>
<DIV id=UpdatePanel1>
<DIV id=div1
style="LEFT: 0px; POSITION: absolute; TOP: 0px; BACKGROUND-COLOR: #0066ff"></DIV>
<DIV id=div2
style="LEFT: 0px; POSITION: absolute; TOP: 0px; BACKGROUND-COLOR: #0066ff"></DIV>
<DIV> </DIV>
<DIV>
<TABLE cellSpacing=0 cellPadding=0 width=900 align=center border=0>
<TBODY>
<TR>
<TD style="HEIGHT: 105px"><IMG src="images/login_1.gif"
border=0></TD></TR>
<TR>
<TD background=images/login_2.jpg height=300>
<TABLE height=300 cellPadding=0 width=900 border=0>
<TBODY>
<TR>
<TD colSpan=2 height=35></TD></TR>
<TR>
<TD width=360></TD>
<TD>
<TABLE cellSpacing=0 cellPadding=2 border=0>
<TBODY>
<TR>
<TD style="HEIGHT: 28px" width=80>登 錄 名：</TD>
<TD style="HEIGHT: 28px" width=150><INPUT id=txtName
style="WIDTH: 130px" name=user_code></TD>
<TD style="HEIGHT: 28px" width=370><SPAN
id=RequiredFieldValidator3
style="FONT-WEIGHT: bold; VISIBILITY: hidden; COLOR: white">請輸入登錄名</SPAN></TD></TR>
<TR>
<TD style="HEIGHT: 28px">登錄密碼：</TD>
<TD style="HEIGHT: 28px"><INPUT id=txtPwd style="WIDTH: 130px"
type=password name=user_password></TD>
<TD style="HEIGHT: 28px"><SPAN id=RequiredFieldValidator4
style="FONT-WEIGHT: bold; VISIBILITY: hidden; COLOR: white">請輸入密碼</SPAN></TD></TR>
<TR>
<TD style="HEIGHT: 28px">驗證碼：</TD>
<TD style="HEIGHT: 28px"><INPUT id=txtcode
style="WIDTH: 130px" name=txtcode></TD>
<TD style="HEIGHT: 28px"> </TD></TR>
<TR>
<!-- 加入提示錯誤信息：利用ognl取出棧中exception的錯誤信息 -->
<TD style="HEIGHT: 18px" colspan="2" ><font color="red" ><s:property value="exception.message" /> </font></TD>
<TD style="HEIGHT: 18px"></TD>
<TD style="HEIGHT: 18px"></TD></TR>
<TR>
<TD></TD>
<TD><INPUT id=btn
style="BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px"
type=image src="images/login_button.gif" name=btn>
</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD><IMG src="images/login_3.jpg"
border=0></TD></TR></TBODY></TABLE></DIV></DIV>
<!-- 顯示valuestack -->
<s:debug></s:debug>
</FORM></BODY></HTML>