关于网上考试系统的

				package com.tarena.exam.model;
				import java.io.Serializable;
				import java.util.Properties;
				
				public class Request implements Serializable{
					public static final int LOGIN_REQUEST=1;
					public static final int BEGIN_REQUEST=2;
					public static final int SEND_REQUEST=3;
					public static final int QUIT_REQUEST=4;
					
					private int type;
					private Properties pro;
					private static final long serialVersionUID=-371890756421779L;
					
					public Request(int type){
						this.type=type;
						pro=new Properties();
					}
					
					public void addData(String key,String value){
						pro.put(key,value);
					}
					
					public String getData(String key){
						return pro.getProperty(key);
					}
				
					public int getType() {
						return type;
					}
				
				}