課件課后練習代碼經典案例

JavaOOPLogData數據成員設計及LogData基于字節(jié)數組的構造方法設計及LogData其他構造方法設計及LogRec數據成員設計及LogRec重載構造方法設計及l(fā)ogRecmatch方法的實Controller數據成員設計及實ControllerparseLogData方法設計及實ControllermatchLogData方法設計及實Controller數據抓取TimerTask設計及實Controller排序及groupBy方法設計及實Controller與View層關聯(lián)及數據更新LogDataLogData對象是從日志byte[]數組中解析出來的一個日志數據.實例變量代表日志屬性,常量是日志解析規(guī)則常數.還要定義日志屬性方法.user戶登錄time錄時host客戶登錄的地*登錄狀態(tài),是typepublicstaticfinalshort=*登出狀態(tài),是typepublicstaticfinalshort=/**Unix標準登錄類型定義privatestaticfinalString[]TYPES={"RUN_LVL","OLD_TIME","INIT_PROCESS","USER_PROCESS","ACCOUNTING"*日志文件記錄長度,是UnixpublicstaticfinalintLOG_LENGTH=372;*業(yè)務帳號,用戶屬性偏移位置,采用ASCIIpublicstaticfinalintUSER_OFFSET=publicstaticfinalintUSER_LENGTH=*進程號偏移位置,連續(xù)4個byte,是一個intpublicstaticfinalintPID_OFFSET=*登錄類型偏移位置,連續(xù)兩個byte,是shortpublicstaticfinalintTYPE_OFFSET=*登錄類型偏移位置,連續(xù)4個byte,intpublicstaticfinalintTIME_OFFSET=*登錄用戶主機名偏移位置,是ASCII編碼字符串,每個bytepublicstaticfinalintHOST_OFFSET=publicstaticfinalintHOST_LENGTH=publicclassLogData{{publicclass*登錄狀態(tài),是typepublicstaticfinalUSER_PROCESS=*登出狀態(tài),是typepublicstaticfinalDEAD_PROCESS=/**Unix標準登錄類型定義privatestaticfinalString[]TYPES={"RUN_LVL","OLD_TIME","INIT_PROCESS","USER_PROCESS","ACCOUNTING"*日志文件記錄長度,是UnixpublicstaticfinalintLOG_LENGTH=372;*privateString*業(yè)務帳號,用戶屬性偏移位置,采用ASCIIpublicstaticfinalintUSER_OFFSET=publicstaticfinalintUSER_LENGTH=*登錄進程號碼intprivateint*進程號偏移位置,連續(xù)4個byte,是一個intpublicstaticfinalintPID_OFFSET=*登錄類型:LOGIN或LOGOUTshortprivateshort*登錄類型偏移位置,連續(xù)兩個byte,是shortpublicstaticfinalintTYPE_OFFSET=*登錄時間,以秒為單位,int類型,是1970privateint*登錄類型偏移位置,連續(xù)4個byte,intpublicstaticfinalintTIME_OFFSET=80;*登錄用戶主機名,經常是IPprivateString*登錄用戶主機名偏移位置,是ASCII編碼字符串,每個bytepublicstaticfinalintHOST_OFFSET=publicstaticfinalintHOST_LENGTH= 增加屬性方法publicStringgetUser()return}publicvoidsetUser(String{this.user=}publicintgetPid()return}publicvoidsetPid(intpid)this.pid=}publicshortgetType()return}publicvoidsetType(short{this.type=}publicintgetTime()return}publicvoidsetTime(inttime)this.time=}publicStringgetHost()return publicvoidsetHost(Stringhost)this.host=publicclass{*登錄狀態(tài),是typepublicstaticfinalshortUSER_PROCESS=7;*登出狀態(tài),是typepublicstaticfinalshortDEAD_PROCESS=8;/**Unix標準登錄類型定義privatestaticfinalString[]TYPES={"RUN_LVL","OLD_TIME","INIT_PROCESS","USER_PROCESS","ACCOUNTING"*日志文件記錄長度,是UnixpublicstaticfinalintLOG_LENGTH=372;*privateString*業(yè)務帳號,用戶屬性偏移位置,采用ASCIIpublicstaticfinalintUSER_OFFSET=publicstaticfinalintUSER_LENGTH=*登錄進程號碼intprivateint*進程號偏移位置,連續(xù)4個byte,是一個intpublicstaticfinalintPID_OFFSET=*登錄類型:LOGIN或LOGOUTshortprivateshort*登錄類型偏移位置,連續(xù)兩個byte,是shortpublicstaticfinalintTYPE_OFFSET=*登錄時間,以秒為單位,int類型,是1970privateint*登錄類型偏移位置,連續(xù)4個byte,intpublicstaticfinalintTIME_OFFSET=80;*登錄用戶主機名,經常是IPprivateString*登錄用戶主機名偏移位置,是ASCII編碼字符串,每個bytepublicstaticfinalintHOST_OFFSET=publicstaticfinalintHOST_LENGTH=publicStringgetUser()return}publicvoidsetUser(String{this.user=}publicintgetPid()return}publicvoidsetPid(intpid)this.pid=}publicshortgetType()return}publicvoidsetType(short{this.type=}publicintgetTime()return}publicvoidsetTime(inttime)this.time=}publicStringgetHost()return}publicvoidsetHost(String{this.host=}}}在DMS業(yè)務中需要解析byte[]類型日志數據,解析為日志對象LogData對象實例.構造器是用來創(chuàng)建對象,初始化對象的屬性的.可以利用構造器解析byte[]數量類型的日志,創(chuàng)建LogData類型實例:將byte[]數據類型的日志解析為日將指定位置開始的byte[]數據類型的日志解析為日志將byteUnixbyte[]中數據解析為日志屬性,解析策參考DMS軟件需求說明書中數據定義部分:*根據日志數據byte[]解析為LogData參數log是日志數據,log一定是372個byte*@paramlog日志數據,log一定是372個bytepublicLogData(byte[]log)this.user=Utils.toString(log,USER_OFFSET,this.pid=Utils.toInt(log,PID_OFFSET);this.time=Utils.toInt(log,TIME_OFFSET);this.type=Utils.toShort(log,this.host=Utils.toString(log,HOST_OFFSET,將指定位置開始的byte[]數據類型的日志解析為日志對象,這個方法是從續(xù)的數據序列*根據日志數據byte[]解析為LogData其中l(wèi)ogs是日志數據,offset也就是說將logsoffset位置開始連續(xù)372字節(jié)@paramlogs@paramoffsetpublicLogData(byte[]logs,int{this.user=logs,USER_OFFSET+offset,this.pid=Utils.toInt(logs,PID_OFFSET+offset);this.time=Utils.toInt(logs,TIME_OFFSET+offset);this.type=Utils.toShort(logs,TYPE_OFFSET+offset);this.host=Utils.toString(logs,HOST_OFFSET+offset,在LogData類中增加如上構造器,并且重寫toString()用于測試.完整LogDatapublicclassLogData登錄狀態(tài),是typepublicstaticfinalshortUSER_PROCESS=登出狀態(tài),是typepublicstaticfinalshortDEAD_PROCESS=/**Unix標準登錄類型定義privatestaticfinalString[]TYPES={"RUN_LVL","BOOT_TIME","OLD_TIME","NEW_TIME","INIT_PROCESS","LOGIN_PROCESS","USER_PROCESS","DEAD_PROCESS","ACCOUNTING"日志文件記錄長度,是Unix publicstaticfinalintLOG_LENGTH=372;*privateString*業(yè)務帳號,用戶屬性偏移位置,采用ASCII編碼publicstaticfinalintUSER_OFFSET=publicstaticfinalintUSER_LENGTH=*登錄進程號碼intprivateint*進程號偏移位置,連續(xù)4個byte,是一個intpublicstaticfinalintPID_OFFSET=*登錄類型:LOGIN或LOGOUTshortprivateshort*登錄類型偏移位置,連續(xù)兩個byte,是shortpublicstaticfinalintTYPE_OFFSET=*登錄時間,以秒為單位,int類型,是1970privateint*登錄類型偏移位置,連續(xù)4個byte,intpublicstaticfinalintTIME_OFFSET=80;*登錄用戶主機名,經常是IPprivateString*登錄用戶主機名偏移位置,是ASCII編碼字符串,每個bytepublicstaticfinalintHOST_OFFSET=publicstaticfinalintHOST_LENGTH=257;publicLogData()}******

其中l(wèi)ogs是日志數據,offset也就是說將logsoffset位置開始連續(xù)372字節(jié)@paramlogs@paramoffsetpublicLogData(byte[]logs,intoffset)this.user=logs,USER_OFFSET+offset,this.pid=Utils.toInt(logs,PID_OFFSET+this.time=Utils.toInt(logs,TIME_OFFSET+this.type=Utils.toShort(logs,TYPE_OFFSET+this.host=logs,HOST_OFFSET+offset,}**參數log是日志數據,log一定是372個byte*@paramlog日志數據,log一定是372個bytepublicLogData(byte[]log)this.user=Utils.toString(log,USER_OFFSET,this.pid=Utils.toInt(log,this.time=Utils.toInt(log,this.type=Utils.toShort(log,this.host=Utils.toString(log,HOST_OFFSET,}publicStringgetUser()return}publicvoidsetUser(String{this.user=}publicintgetPid()return}publicvoidsetPid(intpid)this.pid=}publicshortgetType()return}publicvoidsetType(short{this.type=}publicintgetTime()return}publicvoidsetTime(inttime)this.time=}publicStringgetHost()return}publicvoidsetHost(Stringhost)this.host=}publicDategetDate()returnnewDate(this.time*}publicStringgetDateString()return}**publicStringStringstr=this.user+","+pid+","+TYPES[this.type]++Utils.formatDate(getTime())+","+return}publicStringtoString() separator=Stringstr=this.user+separator+pid+separator++separator+time+separator+return}publicStringtoString(Stringseparator)if(separator==null)separator=}Stringstr=this.user+separator+pid+separator++separator+time+separator+return}}publicclass{publicvoid=6f6d000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000304500070000000000"077c720000000000000000000000"0000000000000000000000000000"003139322e3136382e31302e3132"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000" "000000byte[]bytes=Utils.toBytes(data,LogDatalog1=newLogDatalog2=newLogData(bytes,}}執(zhí)試案例:得到Tom,12357,7,Tom,12357,7,,23,23將將字符串類型數據解析為日志對*構造器構建log的副本對*@parampublicLogData(LogDatalog)this.user=this.pid====}publicLogData(Stringuser,intshorttype,inttime,String{this.user=this.pid=pid;this.type=type;this.time=this.host=*將String類型的log解析為登錄記錄,其中l(wèi)og格式為:"*@paramlogtoString(publicLogData(String{String[]data=log.split(",");this.user=this.pid=this.time=this.type=this.host=在LogData類中增加如上構造器,并且重寫toString()用于測試.完整LogDatapublicclassLogData登錄狀態(tài),是typepublicstaticfinalshortUSER_PROCESS=登出狀態(tài),是typepublicstaticfinalshortDEAD_PROCESS=/**Unix標準登錄類型定義privatestaticfinalString[]TYPES={"RUN_LVL","OLD_TIME","INIT_PROCESS","USER_PROCESS","ACCOUNTING"*日志文件記錄長度,是UnixpublicstaticfinalintLOG_LENGTH=372;*privateString*業(yè)務帳號,用戶屬性偏移位置,采用ASCII編碼publicstaticfinalintUSER_OFFSET=publicstaticfinalintUSER_LENGTH=*登錄進程號碼intprivateint*進程號偏移位置,連續(xù)4個byte,是一個intpublicstaticfinalintPID_OFFSET=*登錄類型:LOGIN或LOGOUTshortprivateshort*登錄類型偏移位置,連續(xù)兩個byte,是shortpublicstaticfinalintTYPE_OFFSET=*登錄時間,以秒為單位,int類型,是1970privateint*登錄類型偏移位置,連續(xù)4個byte,intpublicstaticfinalintTIME_OFFSET=80;*登錄用戶主機名,經常是IPprivateString*登錄用戶主機名偏移位置,是ASCII編碼字符串,每個bytepublicstaticfinalintHOST_OFFSET=publicstaticfinalintHOST_LENGTH=257;publicLogData()}*構造器構建log的副本對*@parampublicLogData(LogDatalog)this.user=this.pid=this.type=this.time=this.host= publicLogData(Stringuser,intshorttype,inttime,Stringhost)super();this.user=this.pid=this.type=this.time=this.host=}**其中l(wèi)ogs是日志數據,offset*也就是說將logs數據中offset位置開始連續(xù)372**@paramlogs*@paramoffsetpublicLogData(byte[]logs,intoffset)this.user=logs,USER_OFFSET+offset,this.pid=Utils.toInt(logs,PID_OFFSET+this.time=Utils.toInt(logs,TIME_OFFSET+this.type=Utils.toShort(logs,TYPE_OFFSET+this.host=logs,HOST_OFFSET+offset,}**參數log是日志數據,log一定是372個byte*@paramlog日志數據,log一定是372個bytepublicLogData(byte[]log)this.user=Utils.toString(log,USER_OFFSET,this.pid=Utils.toInt(log,this.time=Utils.toInt(log,this.type=Utils.toShort(log,this.host=Utils.toString(log,HOST_OFFSET,}*將String類型的log解析為登錄記錄,其中l(wèi)og 格式為:"*@paramlog文本日志,格式與toString(publicLogData(Stringlog)String[]data=this.user=this.pid====}publicStringgetUser()return}publicvoidsetUser(String{this.user=}publicintgetPid()return}publicvoidsetPid(intpid)this.pid=}publicshortgetType()return}publicvoidsetType(short{this.type=}publicintgetTime()return}publicvoidsetTime(inttime) this.time= publicStringgetHost()return publicvoidsetHost(Stringhost)this.host= publicDategetDate()returnnewDate(this.time* publicStringgetDateString()return **publicStringStringstr=this.user+","+pid+","+TYPES[this.type]+ +Utils.formatDate(getTime())+","+ return publicStringtoString() separator=Stringstr=this.user+separator+pid+separator+ +separator+time+separator+ return publicStringtoString(Stringseparator)if(separator==null)separator= Stringstr=this.user+separator+pid+separator+ +separator+time+separator+return}}}} Tom,21121,7,,1 Tom,21121,7,,1 Tom,12357,7,,23日志需要匹配為成對是登錄登出記錄對,這個記錄對是需要到計費服務器進行統(tǒng)計計費.需要創(chuàng)建登錄日志記錄對類型,封裝登錄記錄對數據.LogReclogin和logout創(chuàng)建類LogRec,添加login和logoutpublicclassLogRecprivateLogDataprivateLogDatapublicLogRec()在LogRec中添加屬性方publicStringgetUser()returnpublicStringgetHost()returnpublicint{publicint{returnpublicintgetLogoutTime()returnpublicStringgetLogoutTimeString()returnpublicLogData{returnpublicLogData{returnpublicintgetDurations()returngetLogoutTime()-publicStringtoString()returnlogin.toString()+"|"+*logname*logintime*logouttime*durations*logip登錄終端的ippublicclass{privateLogDataprivateLogDatalogout;publicLogRec()}publicStringgetUser()return publicStringgetHost()return publicintgetPid()return publicintgetLoginTime()return publicStringgetLoginTimeString()return publicintgetLogoutTime()return publicStringgetLogoutTimeString()return}publicLogDatagetLogin()return}publicLogDatagetLogout()return}publicintgetDurations()returngetLogoutTime()-}publicStringtoString()returnlogin.toString()+"|"+}}根據登錄登出記錄創(chuàng)建日志記將文本形式的日志記錄對數據解析為日志IP判斷一個為登錄,一個為登出.publicLogRec(LogDatalogin,LogDatalogout) wnewRuntimeException({thrownewRuntimeException((login.getPid()!=logout.getPid())thrownewRuntimeException(if{thrownewRuntimeException(this.login=login;this.logout=logout;算法實現(xiàn),重用LogData@parampublicLogRec(StringfileRow)String[]data=this.login=newLogData(data[0]);this.logout=newLogData(data[1]);lognamelogintime登入時刻logouttime登出時刻durations*logip登錄終端的ippublicclassLogRec{privateLogDataprivateLogDatalogout;publicLogRec()}**@parampublicLogRec(StringfileRow)String[]data=this.login=newthis.logout=new publicLogRec(LogDatalogin,LogDatalogout)thrownewRuntimeException(" if thrownewRuntimeException(" if(login.getPid()!=logout.getPid())thrownewRuntimeException(" if thrownewRuntimeException(" this.login=this.logout= pubpublicStringgetUser()return publicStringgetHost()return publicintgetPid()return publicintgetLoginTime()return publicStringgetLoginTimeString()return publicintgetLogoutTime()return publicStringgetLogoutTimeString()return publicLogDatagetLogin()return publicLogDatagetLogout()return publicintgetDurations()returngetLogoutTime()- publicStringtoString()returnlogin.toString()+"|"+publicclassUnitTestpublicvoidLogDatalogin=newLogData("Tom",21121,(short)7,LogDatalogout=newLogData("Tom",21121,(short)8, LogReclogRec1=newLogRec(login,Strings=,23|"LogReclogRec2=new執(zhí)行得到Tom,21121,7,Tom,12357,7,,1|Tom,21121,8,,23|Tom,12357,8,,192.168.,192.16logRecmatch在LogRec中添加一個有登錄記錄的構造器,和一個匹配登出記錄的方法match用登錄記錄創(chuàng)建一個LogRecmatch登出記錄,并且返回true表示匹配成功.LogRec對象的匹配狀態(tài)如圖34:登錄記錄創(chuàng)建一個LogRec用于與match()@paramloginpublicLogRec(LogData{this.login= **@paramlogout*@return如果匹配成功返回publicbooleanmatch(LogDatareturn} {return}if(login.getPid()!=logout.getPid())return} {return}this.logout=return *logname*logintime*logouttime*durations*logip登錄終端的ip** publicclassLogRec{privateLogDataprivateLogDatalogout;publicLogRec()}**@parampublicLogRec(StringfileRow)String[]data=fileRow.split("\\|");//this.login=newthis.logout=new *登錄記錄創(chuàng)建一個LogRec*用于與match*@paramloginpublicLogRec(LogDatalogin)this.login= publicLogRec(LogDatalogin,LogDatalogout)thrownewRuntimeException("}{thrownewRuntimeException("}(login.getPid()!=logout.getPid())thrownewRuntimeException("}(!login.getHost().equals(logout.getHost())) thrownewRuntimeException("}this.login=this.logout=}**@paramlogout*@return如果匹配成功返回 publicbooleanmatch(LogDatareturn}if{return}if(login.getPid()!=logout.getPid())return}if{return}this.logout=return}publicStringgetUser()return publicStringgetHost()return publicintgetPid()return publicintgetLoginTime()return publicStringgetLoginTimeString()return publicintgetLogoutTime()return publicStringgetLogoutTimeString()return publicLogDatagetLogin()return publicLogDatagetLogout()return publicintgetDurations()returngetLogoutTime()- publicStringtoString()returnlogin.toString()+"|"+login=newLogData("Tom",21121,(short)7,logout=newLogData("Tom",21121,LogReclogRec=newbooleanmatch=logRec.match(loginSystem.out.println(match);//false不能匹配才成功match=logRec.match(logout);/ }:控制器實例需要日志數據源,便于從日志數據源獲取日志數據,并且定時的進行解析和匹配登錄登出日志,記錄匹配結果.需要合適實例變量記錄這些狀態(tài).在控制器中實例變量logDataSource引用數據源對象在控制器中實例變量matched匹配成對的日志數據數組.*,需要privateLogDataSource/**定時器,用于定時獲取日志數據源數據.privateTimer/**全部匹配的成對的Log記錄privateLogRec[]matched=/**已經登錄沒有登出的log記錄,也就是不配對的記錄privateLogData[]loginLogs=并且提供適當的屬性方法publicvoidsetLogDataSource(LogDataSourcelogDataSource)this.logDataSource=*publicclassController*publicfinalstaticintDYNAMIC=*publicfinalstaticintDURN_ASC=*publicfinalstaticintDURN_DESC=*publicfinalstaticintGROUP_BY=*publicfinalstaticintSEARCH=4;*DMS界面窗口對象的,在運行期間要具體窗口對privateDMSFrame*顯示數據的狀態(tài):包括5*privateint*日志數據源對象的,需要到具體數據源對privateLogDataSource/**定時器,用于定時獲取日志數據源數據.privateTimer /**全部匹配的成對的Log記錄privateLogRec[]matched=/**已經登錄沒有登出的log記錄,也就是不配對的記錄privateLogData[]loginLogs=publicvoidsetLogDataSource(LogDataSource{this.logDataSource=}publicvoidsetDmsFrame(DMSFramedmsFrame)this.dmsFrame=}*publicvoiddynamic()//TimershowType=dmsFrame.updateView("動態(tài)列表",}*publicvoiddurnAsc()showType=dmsFrame.updateView("升序排序日志數據",}*publicvoiddurnDesc()showType=dmsFrame.updateView("降序排序日志數據",}*publicvoidgroupBy()showType=}*publicvoidsearch()Stringkey=if(key.trim().equals(""))}showType=dmsFrame.updateView("搜索功能:"+}}從數據源獲取byte[]類型的log數據,需要解析為LogData從日志數據byte[]日志數據,根據byte[]日志數據長度計算解析的logData對象數量,將每在Controller中添加parseLogData@param intlength=logs.length/LogData[]list=newfor(intoffset=0,i=0;offset<offset+=LogData.LOG_LENGTH)list[i++]=newLogData(logs, return =6f6d000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000304500070000000000"077c720000000000000000000000"0000000000000000000000000000"003139322e3136382e31302e3132"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000"0000000000000000000000000000" "+ "+ "+ "+ "+ Controllercontroller=newLogData[]logs=}}執(zhí)行得到[Tom,12357,7,,23,Tom,12357,7,osIP配為一個LogRec對象.參考DMSV2詳細設計文檔2.2數據描述.為了實現(xiàn)登錄登出日志匹配操作,找到登錄日志記錄,調用matchLogOut如果找到登出日志,則matchLogOut()方法返回LogRecmatchLogOut方法返回null匹配成功的數組,表示已經登錄沒有登出的日志.算法流程參考圖匹配登出記錄方法matchLogOut()的實現(xiàn)算法:在日志對象數組list中查找配置登錄日志login對象的對應的登出日志對象logoutLogRecnull實現(xiàn)流程參考圖37***@param *@param *@return登出日志privateLogRecmatchLogOut(LogData[]LogDatalogin)LogReclogRec=newfor(LogDatalog:list)if{return}} return*privatevoidmatchLogData(LogData[]newLogs)LogData[]list=newLogs.length+System.arraycopy(loginLogs,0,newLogs.length,this.loginLogs=newLogData[]for(LogDatalog:list)//if(log.getType()=={LogDatalogin=//LogReclogRec=matchLogOut(list,//if(logRec!=null)matched=Arrays.copyOf(matched,matched.length+1);matched[matched.length-1]=}elseloginLogs=Arrays.copyOf(loginLogs,loginLogs.length+1);loginLogs[loginLogs.length-1]=Controller數據抓取TimerTask實現(xiàn)從數據源定時抓取byte利用java.util.Timer創(chuàng)建Timer類的實例,利用timer的方法schedult(timerTask010001000timerTask的run(在timerTask的run并且調用showDataList(matched)顯示數據到界面上.* publicvoid{if(timer!=null)timer=newtimer.schedule(newTimerTask()publicvoid{System.out.println("Catchlogs");byte[]logs=logDataSource.getNextLogs();LogData[]newLogs=parseLogData(logs);if(showType==DYNAMIC)},0,Controller排序及groupByOS登錄名進行利用集合的工具類ArraysAPI提供的排序方法sort實現(xiàn)自定義排序.自定義排序sort方法有兩個參數,第一個是被排序數組的,第二個參數是排序過程中的比較規(guī)則.比較規(guī)則是實現(xiàn)Comparator接口的對象,這個對象中實現(xiàn)比較規(guī)則方法intcompare(LogReco1,LogReco2).方法參數是排序過程中的兩個被比較對象,方法返回值如果等于0表示兩個對象相等,如果返回值>0表示o1大于o2,如果返回值<0表示o1小于o2.為了代碼的簡潔,可以采用內部類實現(xiàn)Comparator接口為了避免排序規(guī)程對原數組內容產生影響,要對原數組進行,對副本數組進行排序.升序的*publicvoiddurnAsc()LogRec[]all=Arrays.copyOf(matched,Arrays.sort(all,newComparator<LogRec>()publicintcompare(LogReco1,LogRec{returno1.getDurations()-showType=*publicvoiddurnAsc()LogRec[]all=Arrays.copyOf(matched,Arrays.sort(all,newComparator<LogRec>()publicintcompare(LogReco1,LogReco2)returno1.getDurations()- showType= *publicvoiddurnDesc()LogRec[]all=Arrays.copyOf(matched,Arrays.sort(all,newComparator<LogRec>()publicintcompare(LogReco1,LogReco2)returno1.getDurations()-}showType=}在Controller中增加按照用戶名分組統(tǒng)計的方法,并且添加成員內部類*publicvoidgroupBy()LogRec[]all=Arrays.copyOf(matched,Arrays.sort(all,newComparator<LogRec>()publicintcompare(LogReco1,LogReco2)}GroupLoggroupLog=null;GroupLog[]groupLogs={};GroupLogfor(LogReclogRec:all)if(groupLog!=null&&groupLog.sameUser(logRec)){}else//創(chuàng)建新GroupLog對象,添加到統(tǒng)計數組中groupLog=newGroupLog(logRec);groupLogs=Arrays.copyOf(groupLogs,groupLogs.length+1);groupLogs[groupLogs.length-1]=groupLog;}}//顯示到//顯示到showType=}classGroupLogStringintpublicGroupLog(LogReclog)this.user=this.durn= publicbooleansameUser(LogReclogRec)return }publicbooleanadd(LogReclogRec)if(sameUser(logRec))this.durn+=return}elsereturn}}publicStringtoString()returnUtils.leftPad(user,12)+Utils.leftPad("",+Utils.leftPad("",22)+Utils.leftPad("",+Utils.leftPad(durn,10)+Utils.leftPad("",}}在Controller中增加重載的方法showDataList()用于顯示數據到上.這個方法中首先將需要顯示的數據進行格式化,格式化為時候顯示的文本內容,然后調用界面上updateView方法顯示格式化的數據,并且在顯示時候傳遞數據的類型.在Controller@parampublicvoidshowDataList(LogRec[]list)StringBuilderbuf=newfor(LogReclogRec:list) 12)); logRec.getLoginTimeString(),logRec.getLogoutTimeString(), 16));} }***@param publicvoidshowDataList(GroupLog[]list)StringBuilderbuf=newfor(GroupLoglog:list)}}publicclassDMSMainpublicstaticvoidmain(String[]args)DMSFramedmsFrame=newControllercontroller=newLogDataSourcelogDataSource=new}}*publicclassControllerpublicfinalstaticintDYNAMIC=publicfinalstaticintDURN_ASC=publicfinalstaticintDURN_DESC=publicfinalstaticintGROUP_BY=*publicfinalstaticintSEARCH=4;*DMS界面窗口對象的,在運行期間要具體窗口對privateDMSFrame*顯示數據的狀態(tài):包括5privateintshowType; *日志數據源對象 ,需 privateLogDataSource/**定時器,用于定時獲取日志數據源數據.privateTimer/**全部匹配的成對的Log記錄privateLogRec[]matched=/**已經登錄沒有登出的log記錄,也就是不配對的記錄privateLogData[]loginLogs=publicvoidsetLogDataSource(LogDataSourcelogDataSource)this.logDataSource= publicvoidsetDmsFrame(DMSFramedmsFrame)this.dmsFrame= * publicvoidstartCatchLogs()if(timer!=null)}timer=newtimer.schedule(newTimerTask()publicvoidrun()System.out.println("Catchlogsbyte[]logs=LogData[]newLogs=if(showType==}},0,1000);}***@param** publicLogData[]parseLogData(byte[]logs)intlength=logs.len