Struts2登入及其攔截器的實現(Struts2+Hibernate)
阿新 • • 發佈：2018-12-24
1 登入功能的簡單實現
1.1 Action類
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("使用者名稱或密碼錯誤"); 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頁面的編寫
<%@ 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"> 使用者名稱 ：<input type="text" name="user_code" /><br/> 密碼：<input type="password" name="user_password"/><br/> <input type="submit" value="提交"/> </form> </body> </html>
1.4 service層編寫
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層編寫
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 登入攔截器的實現
2.1 Interceptor類的編寫
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 {
//判斷session中是否存在使用者資料
User existUser=(User) ServletActionContext.getRequest().getSession().getAttribute("existUser");
//判斷從session中獲取的使用者的資訊是否為空
if(existUser==null) {
//session中沒有使用者資訊，則沒有登入
ActionSupport actionSupport = (ActionSupport) invocation.getAction();
//輸出提示資訊
actionSupport.addActionError("沒有登入，沒有許可權訪問");
//返回登入頁面
return actionSupport.LOGIN;
}else {
//已經登入
return invocation.invoke();
}
}
}
2.2 攔截器的配置
<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>
<!-- 引入攔截器 -->
<interceptor-ref name="privilegeInterceptor">
<!-- LoginAction.login()不需要進行攔截 -->
<param name="execludeMethods">login</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
</action>
</struts>