【Java开源代码栏目提醒】:文章导读:在新的一年中，各位网友都进入紧张的学习或是工作阶段。网学会员整理了Java开源代码-LogoutState.java的相关内容供大家参考，祝大家在新的一年里工作和学习顺利！

    package com.javapatterns.state.login;
    
    public class LogoutState extends UserState
    {
        public LogoutState()
        {
            //write your code here
        }
    
        public boolean login(String userId, String password)
        {
            StringBuffer sql = new StringBuffer(50);
            sql.append("SELECT COUNT(*) FROM user_info WHERE user_id = '")
                .append(userId)
                .append("' AND password = '")
                .append(password)
                .append("'");
    
            int counting = DBManager.getAggregate(sql.toString());
    
            if(counting > 0)
            {
                this.setNextPage(UserState.PAGE_WELCOME);
                this.setCurrentState(new LoginState());
                return true;
            }
            else
            {
                this.setNextPage(UserState.PAGE_LOGIN);
                this.setCurrentState(new LogoutState());
                return false;
            }
        }
    
        public void logout()
        {
            this.setCurrentState(new LogoutState());
          this.setNextPage(UserState.PAGE_LOGIN);
        }
    }
    

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