航空定票系统：户端功能模块：用户登录模块

				package com.tarena.abs.model;
				import java.io.Serializable;
				import java.util.*;
				public class Request implements Serializable{
					private String header;
					private Properties parameters;
					private static final long serialVersionUID = 800120791203985L;
					public Request(String header){
						parameters=new Properties();
						this.header=header;
					}
					public void setParameter(String key,String value){
						this.parameters.setProperty(key,value);
					}
					public String getParameter(String key){
						return this.parameters.getProperty(key);
					}
					public Properties getAllParameters(){
						return this.parameters;
					}
					public String getHead(){
						return header;
					}
				}