1 登录功能的简单实现
1.1 Action类
package com.itykd.web.action;
import org.apache.struts2.ServletActionContext;
import com.itykd.domain.User;
import com.itykd.service.UserService;
import com.itykd.service.impl.UserServiceImpl;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class LoginAction extends ActionSupport implements ModelDriven<User>{
private User user = new User();
@Override
public User getModel() {
return user;
}
public String login() {
UserService userService = new UserServiceImpl();
User existUser = userService.login(user);
if(existUser == null){
this.addActionError("用户名或密码错误");
return LOGIN;
}else{
ServletActionContext.getRequest().getSession().setAttribute("existUser", existUser);
return SUCCESS;
}
}
}
1.2 struts.xml的配置
<struts>
<package name="demo" extends="struts-default" namespace="/">
<action name="login_*" class="com.itykd.web.action.LoginAction" method="{1}">
<result name="success" type="redirect">/success.jsp</result>
<result name="login">/loginTest.jsp</result>
</action>
</struts>
1.3 jsp页面的编写
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<s:actionerror/>
<form action="${pageContext.request.contextPath }/login_login.action" method="post">
用户名 ：<input type="text" name="user_code" /><br/>
密码：<input type="password" name="user_password"/><br/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
1.4 service层编写
package com.itykd.service.impl;
import com.itykd.dao.UserDao;
import com.itykd.dao.impl.UserDaoImpl;
import com.itykd.domain.User;
import com.itykd.service.UserService;
public class UserServiceImpl implements UserService {
@Override
public User login(User user) {
UserDao userDao = new UserDaoImpl();
return userDao.login(user);
}
}
1.5 dao层编写
package com.itykd.dao.impl;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.itykd.dao.UserDao;
import com.itykd.domain.User;
import com.itykd.util.HibernateUtils;
public class UserDaoImpl implements UserDao {
@Override
public User login(User user) {
Session session = HibernateUtils.getCurrentSession();
Transaction tx = session.beginTransaction();
Query query = session.createQuery("from User where user_code=? and user_password=?");
query.setParameter(0, user.getUser_code());
query.setParameter(1, user.getUser_password());
List<User> list = query.list();
if(list.size()>0){
return list.get(0);
}
tx.commit();
return null;
}
}
2 登录拦截器的实现
2.1 Interceptor类的编写
package com.itykd.web.interceptor;
import org.apache.struts2.ServletActionContext;
import com.itykd.domain.User;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;
public class PrivilegeInterceptor extends MethodFilterInterceptor{
@Override
protected String doIntercept(ActionInvocation invocation) throws Exception {
//判断session中是否存在用户数据
User existUser=(User) ServletActionContext.getRequest().getSession().getAttribute("existUser");
//判断从session中获取的用户的信息是否为空
if(existUser==null) {
//session中没有用户信息，则没有登录
ActionSupport actionSupport = (ActionSupport) invocation.getAction();
//输出提示信息
actionSupport.addActionError("没有登录，没有权限访问");
//返回登录页面
return actionSupport.LOGIN;
}else {
//已经登录
return invocation.invoke();
}
}
}
2.2 拦截器的配置
<struts>
<package name="demo" extends="struts-default" namespace="/">
<interceptors>
<interceptor name="privilegeInterceptor" class="com.itykd.web.interceptor.PrivilegeInterceptor"/>
</interceptors>
<action name="login_*" class="com.itykd.web.action.LoginAction" method="{1}">
<result name="success" type="redirect">/success.jsp</result>
<result name="login">/loginTest.jsp</result>
<!-- 引入拦截器 -->
<interceptor-ref name="privilegeInterceptor">
<!-- LoginAction.login()不需要进行拦截 -->
<param name="execludeMethods">login</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
</action>
</struts>