JSP专题：第六部分：用JSP实现聊天室-2

speaking.java：
package customers;
import java.util.*;
public class speaking 
  {String mySpeaking;/*发言内容*/
   String sourceUserId;/*发出信息的用户的用户ID*/
   String targetUserId;/*接收信息的用户的用户ID*/
   String sourceUserName;/*发出信息的用户的用户名*/
   String targetUserName;/*接收信息的用户的用户名*/
   String face;/*表情*/
   String color;/*显示颜色*/
   String radprivate;/*是否私聊*/
   public void setSpeaking(String theSpeaking,String theSourceUserId,
   String theTargetUserId,
      String theSourceUserName,String theTargetUserName,
      String theFace,String theColor,
      String theRadprivate)
   //新发言内容设定
     {mySpeaking=theSpeaking;
      sourceUserId=theSourceUserId;
      targetUserId=theTargetUserId;
      sourceUserName=theSourceUserName;
      targetUserName=theTargetUserName;
      face=theFace;
      color=theColor;
      radprivate=theRadprivate;
     }
   public String returnSpeaking(String thisUserId)
   //返回某一用户所能看到的该发言内容显示
     {String thisSpeaking=new String("");
      if (radprivate.equals("system")) 
         {if (color.equals("red"))
             thisSpeaking="<font size=2 color=red>（系统公告）"
	     +sourceUserName+"进入聊天室。</font><br>";
          else 
             thisSpeaking="<font size=2 color=green>（系统公告）"
	     +sourceUserName+"离开聊天室。</font><br>";
         }
         //约定是否私聊为“system”，显示颜色为“red”及“green”
	 时分别表示用户进出聊天室的系统公告，该信息对所有用户可见
      else
       {if ((!radprivate.equals("yes"))' '(targetUserId.equals(thisUserId))' '
             (sourceUserId.equals(thisUserId)))
             {if (targetUserId.equals("all"))
                 thisSpeaking="<font size=2 color="+color+">"
		 +sourceUserName+"对大家"+returnFace(face)+"说：
		 "+mySpeaking+"</font><br>";
              else 
                 thisSpeaking="<font size=2 color="+color+">"
		 +sourceUserName+"对"+targetUserName+returnFace(face)+"说：
		 "+mySpeaking+"</font><br>";
             }
         }
         //约定非私聊信息、该用户发出的信息、向该用户发出的信息、
	 向大家发出的信息，具备以上条件之一的聊天信息对该用户可见。
      return thisSpeaking; 
     }
  public String returnFace(String theFace)
  //根据表情代码返回表示表情的字符串
     {int nn;
      nn=Integer.parseInt(theFace);
      String thisFace=new String("");
      switch (nn)
         {case 1:thisFace="笑嘻嘻地";break;
          case 2:thisFace="微笑着";break;
         } 
      return thisFace;
     }
 }
 

ChatRoom.java：
package customers;
import java.util.*;
public class ChatRoom 
  {speaking chatSpeaking[][];/*聊天室的全部发言内容*/
   private int speakingCount[];/*聊天室的发言条数*/
   private int userCount[];/*聊天室的在线人数*/
   oneUser theUserList[][];/*聊天室的在线用户列表*/
   public ChatRoom() 
   //构造函数
     {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,String theOneUserSwjg,
   String theOneUserSfks,int chatroom)
   //向在线用户列表中添加用户，如果用户已存在，将不重复添加
     {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,theOneUserSwjg,theOneUserSfks);
         theUserList[chatroom][userCount[chatroom]]=theOneUser;
        }
     }
   public void deleteUserList(String theOneUserId,int chatroom)
   //从在线用户列表中删除用户
     {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)
   //增加聊天信息，如果发言条数未超过30条，则添加一条，发言条数相应加1；
   反之，将丢弃最先的一条发言，再将新发言添加到最后，发言条数不变
     {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)
   //设置用户时间
     {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)
   //获取在线人数
     {return userCount[chatroom];
     }
   public int returnSpeakingCount(int chatroom)
   //获取发言条数
     {return speakingCount[chatroom];
     }
   public String returnUserId(int chatroom,int i)
   //获取聊天室中指定序号的用户的用户ID
     {return theUserList[chatroom][i].getUserId();
     }
   public String returnUserName(int chatroom,int i)
   //获取聊天室中指定序号的用户的用户名
     {return theUserList[chatroom][i].getUserName();
     }
   public String returnUserName(int chatroom,String userId)
   //获取聊天室中指定用户ID的用户的用户名
     {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)
   //获取某用户可见的全部聊天信息
     {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);
             //在调用该方法时，同时判断有无超时用户，如有，将其从在线用户列
	     表中自动删除，并发出相应系统公告
            }
        }
      String allSpeaking=new String("");
      for (i=1;i<=speakingCount[chatroom];i++)
      allSpeaking=allSpeaking+chatSpeaking[chatroom][i]
      .returnSpeaking(thisUser);
      return allSpeaking;
     }
  }