chatroom.java

java 数据库编程源代码

package chatroom;
import java.util.*;
/**
 * Title:        JSP聊天室
 * Description:  Java语言演示程序：JSP聊天室，用于北京师范大学计算机系Java课程教学示范。
 * Copyright:    Copyright (c) 2002
 * Company:      北京师范大学计算中心
 * @author 张庆利
 * @version 1.0
 */

public class ChatRoom {
   speaking chatSpeaking[][];
   private int speakingCount[];
   private int userCount[];
   oneUser theUserList[][];
   public ChatRoom(){
      theUserList=new oneUser[3][100];
      userCount=new int[3];
      chatSpeaking=new speaking[3][50];
      speakingCount=new int[3];
      userCount[1]=0;
      userCount[2]=0;
      speakingCount[1]=0;
      speakingCount[2]=0;
     }
   public void addUserList(String theOneUserId,String theOneUserName,long theOneUserTime,String theOneUserPosion,int chatroom){
      int i;
      for (i=1;i<=userCount[chatroom];i++) if (returnUserId(chatroom,i).equals(theOneUserId)) break;
      if (i==userCount[chatroom]+1){
         userCount[chatroom]=userCount[chatroom]+1;
         oneUser theOneUser=new oneUser();
         theOneUser.setOneUser(theOneUserId,theOneUserName,theOneUserTime,theOneUserPosion);
         theUserList[chatroom][userCount[chatroom]]=theOneUser;
        }
     }
   public void deleteUserList(String theOneUserId,int chatroom){
      int i;
      for (i=1;i<=userCount[chatroom];i++)
        if (returnUserId(chatroom,i).equals(theOneUserId))
          theUserList[chatroom][i]=theUserList[chatroom][userCount[chatroom]];
      userCount[chatroom]=userCount[chatroom]-1;
   }
   public void addSpeaking(String theSpeaking,String theSourceUserId,String theTargetUserId,String theSourceUserName,String theTargetUserName,String theFace,String theColor,String theRadprivate,int chatroom){
      speaking thisSpeaking=new speaking();
      thisSpeaking.setSpeaking(theSpeaking,theSourceUserId,theTargetUserId,theSourceUserName,theTargetUserName,theFace,theColor,theRadprivate);
      if (speakingCount[chatroom]<=30){
         speakingCount[chatroom]=speakingCount[chatroom]+1;
         chatSpeaking[chatroom][speakingCount[chatroom]]=thisSpeaking;
      }
      else{
        int i;
        for (i=1;i<speakingCount[chatroom];i++)
          chatSpeaking[chatroom][i]=chatSpeaking[chatroom][i+1];
        chatSpeaking[chatroom][speakingCount[chatroom]]=thisSpeaking;
      }
   }
   public void setUserTime(String theUserId,long theUserTime,int intchatroom){
     int i;
     for (i=1;i<=userCount[intchatroom];i++)
      if ((theUserList[intchatroom][i].getUserId()).equals(theUserId)){
        theUserList[intchatroom][i].setUserTime(theUserTime);
        break;
      }
   }
   public int returnUserCount(int chatroom){
     return userCount[chatroom];
   }
   public int returnSpeakingCount(int chatroom){
     return speakingCount[chatroom];
   }
   public String returnUserId(int chatroom,int i){
     return theUserList[chatroom][i].getUserId();
   }
   public String returnUserName(int chatroom,int i){
     return theUserList[chatroom][i].getUserName();
   }
   public String returnUserName(int chatroom,String userId){
     String UserName=new String("");
     int i;
     for (i=1;i<=userCount[chatroom];i++)
       if (returnUserId(chatroom,i).equals(userId))
         UserName=theUserList[chatroom][i].getUserName();
      return UserName;
   }
   public String returnAllSpeaking(int chatroom,String thisUser){
     int i;
     java.util.Date dateTimenow=new java.util.Date();
     long longDateTimeNow=(long)dateTimenow.getTime();
     setUserTime(thisUser,longDateTimeNow,chatroom);
     for (i=1;i<=userCount[chatroom];i++){
       long oneUserTime=(long)theUserList[chatroom][i].getUserTime();
       if (longDateTimeNow - oneUserTime>60000){
         addSpeaking("","","",theUserList[chatroom][i].getUserName(),"","","green","system",chatroom);
         deleteUserList(theUserList[chatroom][i].getUserId(),chatroom);
       }
     }
     String allSpeaking=new String("");
     for (i=1;i<=speakingCount[chatroom];i++)
      allSpeaking=allSpeaking+chatSpeaking[chatroom][i].returnSpeaking(thisUser);
     return allSpeaking;
   }
}