ãã计ç®æºè¯è¨çç§ç±»é常çå¤ï¼æ»çæ¥è¯´å¯ä»¥åææºå¨è¯è¨ï¼æ±ç¼è¯è¨ï¼é«çº§è¯è¨ä¸å¤§ç±»ã
ããçµèæ¯åçä¸æ¬¡å¨ä½ï¼ä¸ä¸ªæ¥éª¤ï¼é½æ¯æç
§ä»¥ç»ç¨è®¡ç®æºè¯è¨ç¼å¥½çç¨åºæ¥æ§è¡çï¼ç¨åºæ¯è®¡ç®æºè¦æ§è¡çæ令çéåï¼èç¨åºå
¨é¨é½æ¯ç¨æ们æææ¡çè¯è¨æ¥ç¼åçãæ以人们è¦æ§å¶è®¡ç®æºä¸å®è¦éè¿è®¡ç®æºè¯è¨å计ç®æºååºå½ä»¤ã
ãã计ç®æºæè½è¯å«çè¯è¨åªææºå¨è¯è¨ï¼å³ç±0å1ææç代ç ãä½é常人们ç¼ç¨æ¶ï¼ä¸éç¨æºå¨è¯è¨ï¼å 为å®é常é¾äºè®°å¿åè¯å«ã
ããç®åéç¨çç¼ç¨è¯è¨æ两ç§å½¢å¼ï¼æ±ç¼è¯è¨åé«çº§è¯è¨ã
ããæ±ç¼è¯è¨çå®è´¨åæºå¨è¯è¨æ¯ç¸åçï¼é½æ¯ç´æ¥å¯¹ç¡¬ä»¶æä½ï¼åªä¸è¿æ令éç¨äºè±æ缩åçæ è¯ç¬¦ï¼æ´å®¹æè¯å«åè®°å¿ãå®åæ ·éè¦ç¼ç¨è
å°æ¯ä¸æ¥å
·ä½çæä½ç¨å½ä»¤çå½¢å¼ååºæ¥ãæ±ç¼ç¨åºé常ç±ä¸é¨åç»æï¼æ令ã伪æ令åå®æ令ãæ±ç¼ç¨åºçæ¯ä¸å¥æ令åªè½å¯¹åºå®é
æä½è¿ç¨ä¸çä¸ä¸ªå¾ç»å¾®çå¨ä½ï¼ä¾å¦ç§»å¨ãèªå¢ï¼å æ¤æ±ç¼æºç¨åºä¸è¬æ¯è¾åé¿ãå¤æã容æåºéï¼èä¸ä½¿ç¨æ±ç¼è¯è¨ç¼ç¨éè¦ææ´å¤ç计ç®æºä¸ä¸ç¥è¯ï¼ä½æ±ç¼è¯è¨çä¼ç¹ä¹æ¯æ¾èæè§çï¼ç¨æ±ç¼è¯è¨æè½å®æçæä½ä¸æ¯ä¸è¬é«çº§è¯è¨æè½å®ç°çï¼èä¸æºç¨åºç»æ±ç¼çæçå¯æ§è¡æ件ä¸ä»
æ¯è¾å°ï¼èä¸æ§è¡é度å¾å¿«ã
ããé«çº§è¯è¨æ¯ç®åç»å¤§å¤æ°ç¼ç¨è
çéæ©ãåæ±ç¼è¯è¨ç¸æ¯ï¼å®ä¸ä½å°è®¸å¤ç¸å
³çæºå¨æ令åæ为åæ¡æ令ï¼å¹¶ä¸å»æäºä¸å
·ä½æä½æå
³ä½ä¸å®æå·¥ä½æ å
³çç»èï¼ä¾å¦ä½¿ç¨å æ ãå¯åå¨çï¼è¿æ ·å°±å¤§å¤§ç®åäºç¨åºä¸çæ令ãåæ¶ï¼ç±äºçç¥äºå¾å¤ç»èï¼ç¼ç¨è
ä¹å°±ä¸éè¦æ太å¤çä¸ä¸ç¥è¯ã
ããé«çº§è¯è¨ä¸»è¦æ¯ç¸å¯¹äºæ±ç¼è¯è¨èè¨ï¼å®å¹¶ä¸æ¯ç¹ææä¸ç§å
·ä½çè¯è¨ï¼èæ¯å
æ¬äºå¾å¤ç¼ç¨è¯è¨ï¼å¦ç®åæµè¡çVBãVCãFoxProãDelphiçï¼è¿äºè¯è¨çè¯æ³ãå½ä»¤æ ¼å¼é½åä¸ç¸åã
ããé«çº§è¯è¨æç¼å¶çç¨åºä¸è½ç´æ¥è¢«è®¡ç®æºè¯å«ï¼å¿
é¡»ç»è¿è½¬æ¢æè½è¢«æ§è¡ï¼æ转æ¢æ¹å¼å¯å°å®ä»¬å为两类:
ãã解éç±»ï¼æ§è¡æ¹å¼ç±»ä¼¼äºæ们æ¥å¸¸çæ´»ä¸çâå声翻è¯âï¼åºç¨ç¨åºæºä»£ç ä¸è¾¹ç±ç¸åºè¯è¨ç解éå¨âç¿»è¯âæç®æ 代ç (æºå¨è¯è¨)ï¼ä¸è¾¹æ§è¡ï¼å æ¤æçæ¯è¾ä½ï¼èä¸ä¸è½çæå¯ç¬ç«æ§è¡çå¯æ§è¡æ件ï¼åºç¨ç¨åºä¸è½è±ç¦»å
¶è§£éå¨ï¼ä½è¿ç§æ¹å¼æ¯è¾çµæ´»ï¼å¯ä»¥å¨æå°è°æ´ãä¿®æ¹åºç¨ç¨åºã
ããç¼è¯ç±»ï¼ç¼è¯æ¯æå¨åºç¨æºç¨åºæ§è¡ä¹åï¼å°±å°ç¨åºæºä»£ç âç¿»è¯âæç®æ 代ç (æºå¨è¯è¨)ï¼å æ¤å
¶ç®æ ç¨åºå¯ä»¥è±ç¦»å
¶è¯è¨ç¯å¢ç¬ç«æ§è¡ï¼ä½¿ç¨æ¯è¾æ¹ä¾¿ãæçè¾é«ãä½åºç¨ç¨åºä¸æ¦éè¦ä¿®æ¹ï¼å¿
é¡»å
ä¿®æ¹æºä»£ç ï¼åéæ°ç¼è¯çææ°çç®æ æ件(ï¼ .OBJ)æè½æ§è¡ï¼åªæç®æ æ件è没ææºä»£ç ï¼ä¿®æ¹å¾ä¸æ¹ä¾¿ãç°å¨å¤§å¤æ°çç¼ç¨è¯è¨é½æ¯ç¼è¯åçï¼ä¾å¦Visual Cï¼ï¼ãVisual FoxproãDelphiçã
[NextPage]
å¦ä¹ ç¼ç¨ï¼ä»ä½å
¥æ
ãå¦ææ¨æ³å¦ä¹ ç¼ç¨ï¼å´åä¸ç¥ä»ä½å
¥æï¼é£ä¹æ¨ä¸å¦¨ççä¸é¢çå ç§å¦ä¹ æ¹æ¡ï¼å¯è½ä¼ç»æ¨ä¸äºå¯ç¤ºå§ï¼
==============================================
ããæ¹æ¡ä¸ãBasicè¯è¨ & Visual Basic
ããä¼ç¹
ããï¼1ï¼Basic ç®åæå¦ï¼å¾å®¹æä¸æã
ããï¼2ï¼Visual Basic æä¾äºå¼ºå¤§çå¯è§åç¼ç¨è½åï¼å¯ä»¥è®©ä½ è½»æ¾å°ååºæ¼äº®çç¨åºã
ããï¼3ï¼ä¼å¤çæ§ä»¶è®©ç¼ç¨åå¾è±¡å积æ¨ä¸æ ·ç®åã
ããï¼4ï¼Visual Basic çå
¨é¨æ±å让æ们è¿äºè§äºEnglish就头大ç人åä¸èªç¦ã
ãã缺ç¹
ããï¼1ï¼Visual Basic ä¸æ¯çæ£çé¢å对象çå¼åæå
·ã
ããï¼2ï¼Visual Basic çæ°æ®ç±»å太å°ï¼èä¸ä¸æ¯ææéï¼è¿ä½¿å¾å®ç表达è½åå¾æéã
ããï¼3ï¼Visual Basic ä¸æ¯çæ£çç¼è¯åè¯è¨ï¼å®äº§ççæç»ä»£ç ä¸æ¯å¯æ§è¡çï¼æ¯ä¸ç§ä¼ªä»£ç ãå®éè¦ä¸ä¸ªå¨æé¾æ¥åºå»è§£éæ§è¡ï¼è¿ä½¿å¾Visual Basic çç¼è¯é度大大åæ
¢ã
ãã综述ï¼æ¹æ¡ä¸éååæ¶ç¼ç¨çæåï¼å®å¯¹å¦ä¹ è
çè¦æ±ä¸é«ï¼å ä¹æ¯ä¸ªäººé½å¯ä»¥å¨ä¸ä¸ªæ¯è¾ççæ¶é´éå¦ä¼vBç¼ç¨ï¼å¹¶ç¨VB ååºèªå·±çä½åã对äºé£äºæç¼ç¨å½å游æçæåæ¥è¯´ï¼VB æ¯æ¨æä½³çéæ©ã
ããBasic/Visual Basicç®ä»
==============================================
ããæ¹æ¡äºãPascalè¯è¨ & Delphi
ããä¼ç¹
ããï¼1ï¼Pascalè¯è¨ç»æ严谨ï¼å¯ä»¥å¾å¥½å°å¹å
»ä¸ä¸ªäººçç¼ç¨ææ³ã
ããï¼2ï¼Delphiæ¯ä¸é¨çæ£çé¢å对象çå¼åå·¥å
·ï¼å¹¶ä¸æ¯å®å
¨çå¯è§åã
ããï¼3ï¼Delphi使ç¨äºçç¼è¯ï¼å¯ä»¥è®©ä½ ç代ç ç¼è¯æ为å¯æ§è¡çæ件ï¼èä¸ç¼è¯é度é常快ã
ããï¼4ï¼Delphiå
·æ强大çæ°æ®åºå¼åè½åï¼å¯ä»¥è®©ä½ è½»æ¾å°å¼åæ°æ®åºã
ãã缺ç¹
ããDelphiå ä¹å¯ä»¥è¯´æ¯å®ç¾çï¼åªæ¯Pascalè¯è¨çè¿äºä¸¥è°¨è®©äººæè§æç¹ç¦ã
ãã综述: æ¹æ¡äºæ¯è¾éåé£äºå
·æä¸å®ç¼ç¨åºç¡å¹¶ä¸å¦è¿Pascalè¯è¨çæåã
ããPascalè¯è¨ç®ä»
ããDelphiç®ä»
==============================================
ããæ¹æ¡ä¸ãCè¯è¨ & Visual C++
ããä¼ç¹
ããï¼1ï¼Cè¯è¨çµæ´»æ§å¥½ï¼æçé«ï¼å¯ä»¥æ¥è§¦å°è½¯ä»¶å¼åæ¯è¾åºå±çä¸è¥¿ã
ããï¼2ï¼å¾®è½¯çMFCåºå大精深ï¼å¦ä¼å®å¯ä»¥è®©éå¿æ欲å°è¿è¡ç¼ç¨ã
ããï¼3ï¼VCæ¯å¾®è½¯å¶ä½ç产åï¼ä¸æä½ç³»ç»çç»åæ´å ç´§å¯ã
ãã缺ç¹
ãã对使ç¨è
çè¦æ±æ¯è¾é«ï¼æ¢è¦å
·å¤ä¸°å¯çCè¯è¨ç¼ç¨ç»éªï¼åè¦å
·æä¸å®çWINDOWSç¼ç¨åºç¡ï¼å®çè¿äºä¸ä¸ä½¿å¾ä¸è¬çç¼ç¨ç±å¥½è
å¦ä¹ èµ·æ¥ä¼æä¸å°çå°é¾ã
ãã综述: VCæ¯ç¨åºåç¨çä¸è¥¿ãå¦æä½ æ¯ä¸ä¸ªæ°¸ä¸æ»¡è¶³ç人ï¼èä¸å¯ä»¥å¨ç¼ç¨ä¸æå
¥å¾å¤§çç²¾ååæ¶é´ï¼é£ä¹å¦ä¹ VCä½ ä¸å®ä¸ä¼åæçã
ããCè¯è¨ç®ä»
==============================================
ããæ¹æ¡åãC++è¯è¨ & C++ Builder
ããä¼ç¹
ããï¼1ï¼C++è¯è¨çä¼ç¹å
¨é¨å¾ä»¥ç»§æ¿ã
ããï¼2ï¼å®å
¨çå¯æ¯åã
ããï¼3ï¼æ强çå
¼å®¹æ§ï¼æ¯æOWLãVCLåMFCä¸å¤§ç±»åºã
ããï¼4ï¼ç¼è¯é度é常快ã
ãã缺ç¹
ããç±äºæ¨åºçæ¶é´å¤ªçï¼å
³äºå®çåç§èµæè¿ä¸å¤ªå¤ã
ãã 综述ï¼æ认为C++ Builder æ¯æ好çç¼ç¨å·¥å
·ãå®æ¢ä¿æäºC++è¯è¨ç¼ç¨çä¼ç¹ï¼ååå°äºå®å
¨çå¯è§åã
ããCè¯è¨ç®ä»
==============================================
ããæ¹æ¡äºãSQLè¯è¨ & Power Builder
ãã对äºä¸äºä¼ ç»çæ°æ®å¼å人åæ¥è¯´ï¼Foxproç³»åä¹è®¸è®©ä»ä»¬æå°æ´å çæãä½æ¯å¯¹äºåå¦è
æ¥è¯´ï¼PowerBuilderä¹è®¸æ¯æ好çæ°æ®åºå¼åå·¥å
·ãåç§åæ ·çæ§ä»¶ï¼åè½å¼ºå¤§çPowerBuilderè¯è¨é½ä¼å¸®å©ä½ å¼ååºèªå·±çæ°æ®åºåºç¨ç¨åºã
[NextPage]
JSPç®ä»
ãã å¨Sunæ£å¼åå¸JSP(Java Server Pages)ä¹åï¼è¿ç§æ°çWebåºç¨å¼åææ¯å¾å¿«å¼èµ·äºäººä»¬çå
³æ³¨ãJSP为å建é«åº¦å¨æçWebåºç¨æä¾äºä¸ä¸ªç¬ç¹çå¼åç¯å¢ãæç
§ Sun ç说æ³ï¼JSPè½å¤éåºå¸åºä¸å
æ¬Apache WebServer ãIIS4.0å¨å
ç85%çæå¡å¨äº§åã
ãã JSPä¸ASPçç®åæ¯è¾
ãã JSPä¸MicrosoftçASPææ¯é常ç¸ä¼¼ã两è
é½æä¾å¨HTML代ç ä¸æ··åæç§ç¨åºä»£ç ãç±è¯è¨å¼æ解éæ§è¡ç¨åºä»£ç çè½åãå¨ASPæJSPç¯å¢ä¸ï¼HTML代ç 主è¦è´è´£æè¿°ä¿¡æ¯çæ¾ç¤ºæ ·å¼ï¼èç¨åºä»£ç åç¨æ¥æè¿°å¤çé»è¾ãæ®éçHTML页é¢åªä¾èµäºWebæå¡å¨ï¼èASPåJSP页é¢éè¦éå çè¯è¨å¼æåæåæ§è¡ç¨åºä»£ç ãç¨åºä»£ç çæ§è¡ç»æ被éæ°åµå
¥å°HTML代ç ä¸ï¼ç¶åä¸èµ·åéç»æµè§å¨ãASPåJSPé½æ¯é¢åWebæå¡å¨çææ¯ï¼å®¢æ·ç«¯æµè§å¨ä¸éè¦ä»»ä½éå ç软件æ¯æã
ãã ASPçç¼ç¨è¯è¨æ¯VBScriptä¹ç±»çèæ¬è¯è¨ï¼JSP使ç¨çæ¯Javaï¼è¿æ¯ä¸¤è
æææ¾çåºå«ã
ããæ¤å¤ï¼ASPä¸JSPè¿æä¸ä¸ªæ´ä¸ºæ¬è´¨çåºå«ï¼ä¸¤ç§è¯è¨å¼æç¨å®å
¨ä¸åçæ¹å¼å¤ç页é¢ä¸åµå
¥çç¨åºä»£ç ãå¨ASPä¸ï¼VBScript代ç 被ASPå¼æ解éæ§è¡ï¼å¨JSPä¸ï¼ä»£ç 被ç¼è¯æServlet并ç±Javaèææºæ§è¡ï¼è¿ç§ç¼è¯æä½ä»
å¨å¯¹JSP页é¢ç第ä¸æ¬¡è¯·æ±æ¶åçã
ãã è¿è¡ç¯å¢
ãã æ§è¡ JSP 代ç éè¦å¨æå¡å¨ä¸å®è£
JSP å¼æãæ¤å¤æ们使ç¨çæ¯ Sun ç JavaServer Web Development Kit ï¼ JSWDK ï¼ã为便äºå¦ä¹ ï¼è¿ä¸ªè½¯ä»¶å
æä¾äºå¤§éå¯ä¾ä¿®æ¹ç示ä¾ãå®è£
JSWDK ä¹åï¼åªéæ§è¡ startserver å½ä»¤å³å¯å¯å¨æå¡å¨ãå¨é»è®¤é
ç½®ä¸æå¡å¨å¨ç«¯å£ 8080 çå¬ï¼ä½¿ç¨
http://localhost:8080 å³å¯æå¼ç¼ºç页é¢ã
ãã å¨è¿è¡ JSP 示ä¾é¡µé¢ä¹åï¼è¯·æ³¨æä¸ä¸å®è£
JSWDK çç®å½ï¼ç¹å«æ¯" work "åç®å½ä¸çå
容ãæ§è¡ç¤ºä¾é¡µé¢æ¶ï¼å¯ä»¥å¨è¿éçå° JSP 页é¢å¦ä½è¢«è½¬æ¢æ Java æºæ件ï¼ç¶åå被ç¼è¯æ class æ件ï¼å³ Servlet ï¼ã JSWDK 软件å
ä¸ç示ä¾é¡µé¢å为两类ï¼å®ä»¬æè
æ¯ JSP æ件ï¼æè
æ¯å
å«ä¸ä¸ªè¡¨åç HTML æ件ï¼è¿äºè¡¨ååç± JSP 代ç å¤çãä¸ ASP ä¸æ ·ï¼ JSP ä¸ç Java 代ç åå¨æå¡å¨ç«¯æ§è¡ãå æ¤ï¼å¨æµè§å¨ä¸ä½¿ç¨"æ¥çæºæ件"èåæ¯æ æ³çå° JSP æºä»£ç çï¼åªè½çå°ç»æ HTML 代ç ãææ示ä¾çæºä»£ç åéè¿ä¸ä¸ªåç¬ç" examples "页é¢æä¾ã
ãã Java Servletæ¯ä¸ç§å¼åWebåºç¨ççæ³ææ¶ã JSP以Servletææ¯ä¸ºåºç¡ï¼åå¨è®¸å¤æ¹é¢ä½äºæ¹è¿ãJSP页é¢çèµ·æ¥è±¡æ®éHTML页é¢ï¼ä½å®å
许åµå
¥æ§è¡ä»£ç ï¼å¨è¿ä¸ç¹ä¸ï¼å®åASPææ¯é常ç¸ä¼¼ãå©ç¨è·¨å¹³å°è¿è¡çJavaBean ç»ä»¶ï¼JSP为å离å¤çé»è¾ä¸æ¾ç¤ºæ ·å¼æä¾äºåè¶ç解å³æ¹æ¡ãJSPå¿
å°æ为ASPææ¯çæåç«äºè
ã
[NextPage]
SQLè¯è¨ç®ä»
ããSQLå
¨ç§°æ¯âç»æåæ¥è¯¢è¯è¨(Structured Query Language)âï¼ææ©çæ¯IBMçå£çº¦çç 究å®éªå®¤ä¸ºå
¶å
³ç³»æ°æ®åºç®¡çç³»ç»SYSTEM Rå¼åçä¸ç§æ¥è¯¢è¯è¨ï¼å®çå身æ¯SQUAREè¯è¨ãSQLè¯è¨ç»æç®æ´ï¼åè½å¼ºå¤§ï¼ç®åæå¦ï¼æ以èªä»IBMå
¬å¸1981å¹´æ¨åºä»¥æ¥ï¼SQLè¯è¨ï¼å¾å°äºå¹¿æ³çåºç¨ãå¦ä»æ 论æ¯åOracle ,Sybase,Informix,SQL serverè¿äºå¤§åçæ°æ®åºç®¡çç³»ç»ï¼è¿æ¯åVisual Foxporo,PowerBuilderè¿äºå¾®æºä¸å¸¸ç¨çæ°æ®åºå¼åç³»ç»ï¼é½æ¯æSQLè¯è¨ä½ä¸ºæ¥è¯¢è¯è¨ã
ããStructured Query Languageå
å«4个é¨åï¼
ããæ°æ®æ¥è¯¢è¯è¨DQL-Data Query Language SELECT
ããæ°æ®æ纵è¯è¨DQL-Data Manipulation Language INSERT, UPDATE, DELETE
ããæ°æ®å®ä¹è¯è¨DQL-Data Definition Language CREATE, ALTER, DROP
ããæ°æ®æ§å¶è¯è¨DQL-Data Control Language COMMIT WORK, ROLLBACK WORK
ããSQLçåå²
ããå¨70年代åï¼E.E.Coddé¦å
æåºäºå
³ç³»æ¨¡åã70年代ä¸æï¼IBMå
¬å¸å¨ç å¶ SYSTEM Rå
³ç³»æ°æ®åºç®¡çç³»ç»ä¸ç å¶äºSQLè¯è¨ï¼ææ©çSQLè¯è¨(å«SEQUEL2)æ¯å¨1976 å¹´ 11 æçIBM Journal of R&Dä¸å
¬å¸çã
ãã1979å¹´ORACLEå
¬å¸é¦å
æä¾åç¨çSQLï¼IBMå
¬å¸å¨DB2 åSQL/DSæ°æ®åºç³»ç»ä¸ä¹å®ç°äºSQLã
ãã1986å¹´10æï¼ç¾å½ANSIéç¨SQLä½ä¸ºå
³ç³»æ°æ®åºç®¡çç³»ç»çæ åè¯è¨(ANSI X3. 135-1986)ï¼å为å½é
æ ååç»ç»(ISO)é纳为å½é
æ åã
ãã1989å¹´ï¼ç¾å½ANSIé纳å¨ANSI X3.135-1989æ¥åä¸å®ä¹çå
³ç³»æ°æ®åºç®¡çç³»ç»çSQLæ åè¯è¨ï¼ç§°ä¸ºANSI SQL 89ï¼ è¯¥æ åæ¿ä»£ANSI X3.135-1986çæ¬ã该æ å为ä¸åç»ç»æé纳ï¼
ããâ å½é
æ ååç»ç»(ISO)ï¼ä¸ºISO 9075-1989æ¥åâDatabase Language SQL With Integrity Enhancementâ
ããâ ç¾å½èé¦æ¿åºï¼åå¸å¨The Federal Information Processing Standard Publication(FIPS PUB)127
ããç®åï¼ææ主è¦çå
³ç³»æ°æ®åºç®¡çç³»ç»æ¯ææäºå½¢å¼çSQLè¯è¨ï¼ 大é¨åæ°æ®åºæç®éµå®ANSI SQL89æ åã
ããSQLçä¼ç¹
ããSQL广æ³å°è¢«éç¨æ£è¯´æäºå®çä¼ç¹ãå®ä½¿å
¨é¨ç¨æ·ï¼å
æ¬åºç¨ç¨åºåãDBA管çååç»ç«¯ç¨æ·åçéæµ
ã
ãã(1) éè¿ç¨åè¯è¨
ããSQLæ¯ä¸ä¸ªéè¿ç¨åçè¯è¨ï¼å 为å®ä¸æ¬¡å¤çä¸ä¸ªè®°å½ï¼å¯¹æ°æ®æä¾èªå¨å¯¼èªãSQLå
许ç¨æ·å¨é«å±çæ°æ®ç»æä¸å·¥ä½ï¼èä¸å¯¹å个记å½è¿è¡æä½ï¼å¯æä½è®°å½éãææSQL è¯å¥æ¥åéåä½ä¸ºè¾å
¥ï¼è¿åéåä½ä¸ºè¾åºãSQLçéåç¹æ§å
许ä¸æ¡SQLè¯å¥çç»æä½ä¸ºå¦ä¸æ¡SQLè¯å¥çè¾å
¥ã SQLä¸è¦æ±ç¨æ·æå®å¯¹æ°æ®çåæ¾æ¹æ³ã è¿ç§ç¹æ§ä½¿ç¨æ·æ´æéä¸ç²¾åäºè¦å¾å°çç»æãææSQLè¯å¥ä½¿ç¨æ¥è¯¢ä¼åå¨ï¼å®æ¯RDBMSçä¸é¨åï¼ç±å®å³å®å¯¹æå®æ°æ®ååçæå¿«é度çæ段ãæ¥è¯¢ä¼åå¨ç¥éåå¨ä»ä¹ç´¢å¼ï¼åªå¿ä½¿ç¨åéï¼èç¨æ·ä»ä¸éè¦ç¥é表æ¯å¦æç´¢å¼ï¼è¡¨æä»ä¹ç±»åçç´¢å¼ã
ãã(2) ç»ä¸çè¯è¨
ããSQLå¯ç¨äºææç¨æ·çDBæ´»å¨æ¨¡åï¼å
æ¬ç³»ç»ç®¡çåãæ°æ®åºç®¡çåã åºç¨ç¨åºåãå³çæ¯æç³»ç»äººåå许å¤å
¶å®ç±»åçç»ç«¯ç¨æ·ãåºæ¬çSQL å½ä»¤åªéå¾å°æ¶é´å°±è½å¦ä¼ï¼æé«çº§çå½ä»¤å¨å 天å
便å¯ææ¡ã SQL为许å¤ä»»å¡æä¾äºå½ä»¤ï¼å
æ¬ï¼
ããâ æ¥è¯¢æ°æ®
ããâ å¨è¡¨ä¸æå
¥ãä¿®æ¹åå é¤è®°å½
ããâ 建ç«ãä¿®æ¹åå é¤æ°æ®å¯¹è±¡
ããâ æ§å¶å¯¹æ°æ®åæ°æ®å¯¹è±¡çåå
ããâ ä¿è¯æ°æ®åºä¸è´æ§åå®æ´æ§
ãã以åçæ°æ®åºç®¡çç³»ç»ä¸ºä¸è¿°åç±»æä½æä¾åç¬çè¯è¨ï¼èSQL å°å
¨é¨ä»»å¡ç»ä¸å¨ä¸ç§è¯è¨ä¸ã
ãã(3) æ¯ææå
³ç³»æ°æ®åºçå
Œ
±è¯è¨
ããç±äºææ主è¦çå
³ç³»æ°æ®åºç®¡çç³»ç»é½æ¯æSQLè¯è¨ï¼ç¨æ·å¯å°ä½¿ç¨SQLçæè½ä»ä¸ä¸ªRDBMS转å°å¦ä¸ä¸ªãææç¨SQLç¼åçç¨åºé½æ¯å¯ä»¥ç§»æ¤çã
[NextPage]
Javaè¯è¨ç®ä»
ããä¸. Javaçç±æ¥
ããå½1995å¹´SUNæ¨åºJavaè¯è¨ä¹åï¼å
¨ä¸ççç®å
é½è¢«è¿ä¸ªç¥å¥çè¯è¨æå¸å¼ãé£ä¹Javaå°åºæä½ç¥å¥ä¹å¤å¢ï¼
ããJavaè¯è¨å
¶å®ææ¯è¯çäº1991å¹´ï¼èµ·å被称为OAKè¯è¨ï¼æ¯SUNå
¬å¸ä¸ºä¸äºæ¶è´¹æ§çµå产åè设计çä¸ä¸ªéç¨ç¯å¢ãä»ä»¬æåçç®çåªæ¯ä¸ºäºå¼åä¸ç§ç¬ç«äºå¹³å°ç软件ææ¯ï¼èä¸å¨ç½ç»åºç°ä¹åï¼OAKå¯ä»¥è¯´æ¯é»é»æ é»ï¼çè³å·®ç¹å¤æãä½æ¯ï¼ç½ç»çåºç°æ¹åäºOAKçå½è¿ã
ããå¨Javaåºç°ä»¥åãInternetä¸çä¿¡æ¯å
容é½æ¯ä¸äºä¹å³æ»æ¿çHTMLææ¡£ãè¿å¯¹äºé£äºè¿·æäºWEBæµè§ç人们æ¥è¯´ç®ç´ä¸å¯å®¹å¿ãä»ä»¬è¿«åå¸æè½å¨WENä¸çå°ä¸äºäº¤äºå¼çå
容ï¼å¼å人åä¹æå¸æè½å¤å¨WEBä¸å建ä¸ç±»æ éèè软硬件平å°å°±å¯ä»¥æ§è¡çåºç¨ç¨åºï¼å½ç¶è¿äºç¨åºè¿è¦ææ大çå®å
¨ä¿éã对äºç¨æ·çè¿ç§è¦æ±ï¼ä¼ ç»çç¼ç¨è¯è¨æ¾å¾æ è½ä¸ºåï¼é¢SUNçå·¥ç¨å¸æéå°å¯è§å°äºè¿ä¸ç¹ï¼ä»1994å¹´èµ·ï¼ä»ä»¬å¼å§å°OAKææ¯åºç¨äºWEBä¸ï¼å¹¶ä¸å¼ååºäºHotJavaç第ä¸ä¸ªçæ¬ãå½SUNå
¬å¸1995å¹´æ£å¼ä»¥Javaè¿ä¸ªååæ¨åºçæ¶åï¼å ä¹ææçWEBå¼å人åé½æ³å°ï¼å¢ï¼è¿æ£æ¯ææ³è¦çãäºæ¯Javaæäºä¸é¢èç¼çææï¼ä¸å°é¸ä¸ä¸äºåæäºç½å¤©é¹
ã
ããäº. Javaçå®ä¹
ããJavaæ¯ä¸ç§ç®åçï¼é¢è±¡å¯¹è±¡çï¼åå¸å¼çï¼è§£éçï¼é®å£®çå®å
¨çï¼ç»æçä¸ç«çï¼å¯ç§»æ¤çï¼æ§è½å¾ä¼å¼çå¤çº¿ç¨çï¼å¨æçè¯è¨ã
ããJavaçå¼åç¯å¢æä¸åççæ¬ï¼å¦sunå
¬å¸çJava Developers Kitï¼ ç®ç§° JDKãåæ¥å¾®è½¯å
¬å¸æ¨åºäºæ¯æJavaè§èçMicrosoft Visual J++ Javaå¼åç¯å¢ï¼ç®ç§° VJ++ã
ããä¸. Javaçç¹ç¹
ãã1. å¹³å°æ å
³æ§
ããå¹³å°æ å
³æ§æ¯æJavaè½è¿è¡äºä¸åçå¹³å°ãJavaå¼è¿èææº åçï¼å¹¶è¿è¡äºèææºï¼å®ç°ä¸åå¹³å°çJavaæ¥å£ä¹é´ã使 ç¨Javaç¼åçç¨åºè½å¨ä¸çèå´å
å
±äº«ãJavaçæ°æ®ç±»åä¸ æºå¨æ å
³ï¼Javaèææºï¼Java Virtual Machineï¼æ¯å»ºç«å¨ 硬件åæä½ç³»ç»ä¹ä¸ï¼å®ç°Javaäºè¿å¶ä»£ç ç解éæ§è¡åè½ï¼ æä¾äºä¸åå¹³å°çæ¥å£çã
ãã2. å®å
¨æ§
ããJavaçç¼ç¨ç±»ä¼¼C++,å¦ä¹ è¿C++ç读è
å°å¾å¿«ææ¡Javaçç²¾ é«ãJavaèå¼äºC++çæé对åå¨å¨å°åçç´æ¥æä½ï¼ç¨åº è¿è¡æ¶ï¼å
åç±æä½ç³»ç»åé
ï¼è¿æ ·å¯ä»¥é¿å
ç
æ¯éè¿æ éä¾µå
¥ç³»ç»ãJava对ç¨åºæä¾äºå®å
¨ç®¡çå¨ï¼é²æ¢ç¨åºç éæ³è®¿é®ã
ãã3. é¢å对象
ããJava å¸åäºC++é¢å对象çæ¦å¿µ,å°æ°æ®å°è£
äºç±»ä¸,å©ç¨ç±» çä¼ç¹,å®ç°äºç¨åºçç®æ´æ§å便äºç»´æ¤æ§ãç±»çå°è£
æ§ã 继æ¿æ§çæå
³å¯¹è±¡çç¹æ§ï¼ä½¿ç¨åºä»£ç åªéä¸æ¬¡ç¼è¯ï¼ç¶å éè¿ä¸è¿°ç¹æ§åå¤å©ç¨ãç¨åºååªéæ主è¦ç²¾åç¨å¨ç±»åæ¥ å£ç设计ååºç¨ä¸ãJava æä¾äºä¼å¤çä¸è¬å¯¹è±¡çç±»ï¼é è¿ç»§æ¿å³å¯ä½¿ç¨ç¶ç±»çæ¹æ³ãå¨ Java ä¸ï¼ç±»ç继æ¿å
³ç³»æ¯åä¸çéå¤éçï¼ä¸ä¸ªåç±» åªæä¸ä¸ªç¶ç±»ï¼åç±»çç¶ç±»åæä¸ä¸ªç¶ç±»ãJava æä¾ç Object ç±»åå
¶åç±»ç继æ¿å
³ç³»å¦åä¸æ£µåç«çæ å½¢ï¼æ ¹ç±» 为 Object ç±»ï¼ Object ç±»åè½å¼ºå¤§ï¼ç»å¸¸ä¼ä½¿ç¨å°å®åå
¶ å®æ´¾ççåç±»ã
ãã4. åå¸å¼
ããJava建ç«å¨æ©å±TCP/IPç½ç»å¹³å°ä¸ãåºå½æ°æä¾äºç¨HTTPåFTPåè®®ä¼ éåæ¥åä¿¡æ¯çæ¹æ³ãè¿ä½¿å¾ç¨åºå使ç¨ç½ç»ä¸çæ件å使ç¨æ¬æºæ件ä¸æ ·å®¹æã
ãã5. é®å£®æ§
ããJavaè´åäºæ£æ¥ç¨åºå¨ç¼è¯åè¿è¡æ¶çé误ãç±»åæ£æ¥å¸®å©æ£æ¥åºè®¸å¤å¼åæ©æåºç°çé误ãJavaèªå·²æ纵å
ååå°äºå
ååºéçå¯è½æ§ãJavaè¿å®ç°äºçæ°ç»ï¼é¿å
äºè¦çæ°æ®çå¯è½ãè¿äºåè½ç¹å¾å¤§å¤§æé«äºå¼åJavaåºç¨ç¨åºçå¨æãJavaæä¾ï¼ Nullæéæ£æµã æ°ç»è¾¹çæ£æµã å¼å¸¸åºå£ã Byte codeæ ¡éªã
ããå. Javaä¸C/C++è¯è¨
ããJavaæä¾äºä¸ä¸ªåè½å¼ºå¤§è¯è¨çææåè½ï¼ä½å ä¹æ²¡æä¸ç¹å«æ··ç¹å¾ãC++å®å
¨æ§ä¸å¥½ï¼ä½CåC++被大家æ¥åï¼æ以Java设计æC++å½¢å¼ï¼è®©å¤§å®¶å¾å®¹æå¦ä¹ ã
ããJavaå»æäºC++è¯è¨ç许å¤åè½ï¼è®©Javaçè¯è¨åè½å¾ç²¾ç¼ï¼å¹¶å¢å äºä¸äºå¾æç¨çåè½ï¼å¦èªå¨æ¶éç¢çã
ããJavaå»æäºä»¥ä¸å 个CåC++åè½ï¼
ããæéè¿ç®
ããç»æ
ããtypedefs
ãã#define
ããéè¦éæ¾å
å
ããè¿å°åå°äºå¹³å¸¸åºéç50%ãèä¸ï¼Javaå¾å°ï¼æ´ä¸ªè§£éå¨åªé215KçRAMã
ããé¢è±¡å¯¹è±¡ï¼Javaå®ç°äºC++çåºæ¬é¢è±¡å¯¹è±¡ææ¯å¹¶æä¸äºå¢å¼ºï¼ï¼ä¸ºäºè¯è¨ç®åï¼å é¤äºä¸äºåè½ï¼ãJavaå¤çæ°æ®æ¹å¼åç¨å¯¹è±¡æ¥å£å¤ç对象æ°æ®æ¹å¼ä¸æ ·ã
ããäº. Javaä¸Internet
ããæ们ç¥éï¼æ©å
ç www ä»
å¯ä»¥ä¼ éææ¬åå¾çï¼Javaçåºç°å®ç°äºäºå¨ç页é¢ï¼æ¯ä¸æ¬¡ä¼å¤§çé©å½ã
ããJava并ä¸æ¯ä¸º Internet,WWWè设计çï¼å®ä¹å¯ä»¥ç¨æ¥ç¼åç¬ç«çåºç¨ç¨åºãJava æ¯ä¸ç§é¢å对象è¯è¨ãJava è¯è¨ç±»ä¼¼äº C++ è¯è¨ï¼æ以已çç»ææ¡ C++è¯è¨çç¼ç¨äººåï¼åå¦ä¹ Java è¯è¨å°±å®¹æå¾å¤ï¼Java ç¨åºéè¦ç¼è¯ãå®é
ä¸æä¸¤ç§ Java ç¨åºï¼ä¸ç§ Java åºç¨ç¨åºæ¯ä¸ä¸ªå®æ´çç¨åºï¼å¦ Web æµè§å¨ãä¸ç§ Java å°åºç¨ç¨åºæ¯è¿è¡äº Web æµè§å¨ä¸çä¸ä¸ªç¨åº.
ãã Javaç¨åºåå®çæµè§å¨HotJavaï¼æä¾äºå¯è®©ä½ çæµè§å¨è¿è¡ç¨åºçæ¹æ³ãä½ è½ä»ä½ çæµè§å¨éç´æ¥ææ¾å£°é³ãä½ è¿è½ææ¾é¡µé¢éçå¨ç»ãJavaè¿è½åè¯ä½ çæµè§å¨ææ ·å¤çæ°çç±»åæ件ãå½æ们è½å¨2400 baud线ä¸ä¼ è¾è§é¢å¾è±¡æ¶ï¼HotJavaå°è½æ¾ç¤ºè¿äºè§é¢ã
ããå½ä»Internetçä¸å¤§åå±è¶å¿æ¯çµååå¡ï¼èInternetçå®å
¨é®é¢æ¯å¿
须解å³çé®é¢ï¼é常大çé¨é¨åºè®¾ç½®é²ç«å¢ï¼é»æ¢éæ³ä¾µå
¥ã
ããçµååå¡æ¯å½ä»ççé¨è¯é¢ï¼ç¶èä¼ ç»çç¼ç¨è¯è¨é¾ä»¥èä»»çµååå¡ç³»ç»ï¼çµååå¡è¦æ±ç¨åºä»£ç å
·æåºæ¬çè¦æ±ï¼å®å
¨ãå¯é ãåæ¶è¦æ±è½ ä¸è¿è¡äºä¸åå¹³å°çæºå¨çå
¨ä¸ç客æ·å¼å±ä¸å¡ãJava以å
¶å¼ºå®å
¨æ§ãå¹³å°æ å
³æ§ã硬件ç»ææ å
³æ§ãè¯è¨ç®æ´åæ¶é¢å对象ï¼å¨ç½ç»ç¼ç¨è¯è¨ä¸å æ®æ å¯æ¯æçä¼å¿ï¼æ为å®ç°çµååå¡ç³»ç»çé¦éè¯è¨ã
ããJavaç¨åºè¢«æ¾ç½®å¨Internetæå¡å¨ä¸,å½ç¨æ·è®¿é®æå¡å¨æ¶,Javaç¨åºè¢«ä¸è½½å°æ¬å°çç¨æ·æºä¸,ç±æµè§å¨è§£éè¿è¡ã
[NextPage]
PowerBuilderç®ä»
ããPowerBuilderç产ç
ããPowerBuilderæ¯ç¾å½èåçæ°æ®åºåºç¨å¼åå·¥å
·ç产ååPowerSoftæ¨åºçæå产åï¼å
¶ç¬¬ä¸çäº1991å¹´6ææ£å¼æå
¥å¸åºãå®æ¯å®å
¨æç
§å®¢æ·/æå¡å¨ä½ç³»ç»æç å¶è®¾è®¡çï¼éç¨é¢å对象ææ¯ï¼å¾å½¢åçåºç¨å¼åç¯å¢ï¼æ¯æ°æ®åºçå端å¼åå·¥å
·ã
ããPowerBuilderçç¹ç¹
ããå®æ¯æåºç¨ç³»ç»åæ¶è®¿é®å¤ç§æ°æ®åºï¼å
¶ä¸æ¢å
æ¬Oracel,Sybaseä¹ç±»ç大åæ°æ®åºï¼åå
æ¬FOXPROä¹ç±»æ¯æODBCæ¥å£çå°åæ°æ®åºï¼PowerBuilderæ¯å®å
¨å¯è§åçæ°æ®åºå¼åå·¥å
·ï¼å®æä¾äºå¤§éçæ§ä»¶ï¼å¤§å¤§å å¿«äºé¡¹ç®çå¼åé度ï¼ä¹ä½¿å¼åè
æ´å®¹æææ¡æ°æ®åºçå¼åã
ããå®ä½¿ç¨çç¼ç¨è¯è¨å«åå·¥PowerScriprï¼å®ä¹æ¯ä¸ç§é«çº§çï¼ç»æåçç¼ç¨è¯è¨ãPowerScriptæä¾äºä¸å¥å®æ´çåµå
¥å¼SQLè¯å¥ï¼å¼å人åå¯ä»¥å使ç¨å
¶å®è¯å¥ä¸æ ·èªç±å°ä½¿ç¨SQLè¯è¨ï¼è¿æ ·å°±å¤§å¤§å¢å¼ºäºç¨åºæ纵å访é®æ°æ®åºçè½åãå¯ä»¥è¯´PowerBuilderæ¢éååå¦è
å¿«éå¦ä¹ æ°æ®åºçå¼åï¼åå¯ä»¥è®©æç»éªçå¼å人åå¼ååºåè½å¼ºå¤§çæ°æ®åºï¼æ¯ä¸ç§éç¨é¢é常广çå¼åå·¥å
·ã
ããPowerBuilderæ¯ä¸ä¸ªç¨æ¥è¿è¡å®¢æ·/æå¡å¨å¼åçå®å
¨çå¯è§åå¼åç¯å¢ã使ç¨PowerBuilder,ä½ å¯ä»¥ç¨ä¸ç§å¯è§çç´è§çæ¹å¼æ¥å建åºç¨ç¨åºçç¨æ·çé¢åæ°æ®åºæ¥å£ãè¿æ¯ä¸ä¸ªæ»çæ¦å¿µï¼å®é
ä¸æ¯å¼å人å使ç¨PowerBuilderå»å¼ååºç¨ç¨åºï¼ç±äºæå¼åçåç§åºç¨ç¨åºå
åå©ç¨äºå¾å½¢ç¨æ·æ¥å£(GUI)çä¼ç¹ï¼æ以PowerBuilder被认为æ¯ä¸ä¸ªå¾å½¢å·¥å
·ã
ããå¨å®¢æ·ï¼æå¡å¨ç»æçåºç¨ä¸ï¼PowerBuilderå
·ææè¿°å¤ä¸ªæ°æ®åºè¿æ¥ä¸æ£ç´¢çè½åãç¹å«æ¯PowerBuilderè½ä»å¤§å¤æ°æµè¡çRDBMSä¸ååæ°æ®ï¼ä¸ä¸ç®¡æ°æ®åæ¾å¨ä»éº½å°æ¹ï¼å¦å¤ï¼åç§åºç¨ç¨åºåå¯ä»¥ç¬ç«äºRDBMS,å 为PowerBuilderå¯ä»¥ä½¿ç¨æ°æ®åºçæ åæä½è¯è¨SQL(ç»æåæ¥è¯¢è¯è¨ï¼è¿è¡ã
ãã使ç¨PowerBuilderï¼å¯ä»¥å¾å®¹æå°å¼ååºåè½å¼ºå¤§çå¾å½¢çé¢ç访é®æå¡å¨æ°æ®åºçåºç¨ç¨åºï¼PowerBuilderæä¾äºå»ºç«ç¬¦åå·¥ä¸æ åçåºç¨ç¨åºï¼ä¾å¦è®¢åç»è®°ãä¼è®¡åå¶é ç³»ç»ï¼æéçææå·¥å
·ã
ãã PowerBuilderåºç¨ç¨åºç±çªå£ç»æï¼è¿äºçªå£å
å«ç¨æ·ä¸ä¹äº¤äºçæ§ä»¶ãå¼å人åå¯ä»¥ä½¿ç¨æææ å空é´ï¼å¦æé®ãå¤éæ¡ãä¸æå¼å表æ¡æç¼è¾æ¡ï¼ä»¥åPowerBuilderæä¾çç¹æ®ç使åºç¨ç¨åºæ´æäºå¼åå使ç¨çæ§ä»¶ã
ããé常人们æPowerBuilderçææ¯ä¸ç§å¼åå·¥å
·ï¼å®é
ä¸å®æ¯å
¶ä»å·¥å
·å¼ºå¾å¤ï¼æ¯ä¸ç§å¼ºæåçå¼åç¯å¢ãå¼å人åä¸ä»
è½ç¨å®æ¥å¼åç¨æ·å®¹æ使ç¨çåç§åºç¨ç¨åºè¿å¯ä»¥éè¿PowerBuilderä¿®æ¹æ°æ®åºï¼å©ç¨400å¤ä¸ªå
é¨å®ä¹å½æ°ï¼å¯ä»¥å¼åè½åå
¶ä»åºç¨ç¨åºè¿è¡çåç§åºç¨ç¨åºã
ããPowerBuilderæ£å¨æ为客æ·ï¼æå¡å¨åºç¨å¼åçæ åãç¸å¯¹äºå
¶ä»ä»»ä½å®¢æ·ï¼æå¡å¨å¼åç¯å¢ï¼PowerBuilder使å¼å人åçå·¥ä½æ´å¿«ãææ¬æ´ä½ãè´¨éæ´é«ãåè½æ´å¼ºã
ããPowerBuilder为åºç¨å¼åæä¾äºå
¨é¢ç»¼åæ§çæ¯æï¼å¯ä»¥åå«æ¦æ¬ä¸ºå¦ä¸å ç¹ï¼
ããäºä»¶é©±å¨çåºç¨ç¨åº
ããåè½å¼ºå¤§çç¼ç¨è¯è¨ä¸å½æ°
ããé¢å对象çç¼ç¨
ãã跨平å°å¼å
ããå¼æ¾çæ°æ®åºè¿ç»ç³»ç» ã ã ã
ããPowerBuilderå¼åç¯å¢
ããPowerBuilderå¼åç¯å¢ç±ä¸ç³»åéæçå¾å½¢ç»æ¿(Painter)ç»æï¼åºç¨å¼å人åéè¿ç®åçé¼ æ æä½å³å¯è®¾è®¡ã建ç«ã交äºæ£éªåæµè¯å®¢æ·ï¼æå¡å¨åºç¨ç¨åºã
[NextPage]
Delphiç®ä»
ããDelphiè¿ä¸ªååæºäºå¤å¸è
çåå¸åãå®éä¸äºç¬¬ä¸ä»£è¯è¨çä¼ç¹ã以Object Pascal为åºç¡ï¼æ©å
äºé¢å对象çè½åï¼å¹¶ä¸å®ç¾å°ç»åäºå¯è§åçå¼åæ段ãDelphièª1995å¹´3 æä¸æ¨åºå°±åå°äºäººä»¬çå
³æ³¨ï¼å¹¶å¨å½å¹´ä¸ä¸¾å¤ºå¾äºå¤é¡¹å¤§å¥ã
ããDelphiçåºç°æç ´äºVæ¿å¯è§åç¼ç¨é¢åä¸ç»å¤©ä¸çå±é¢ã并ä¸Delphi使ç¨äºæ¬å°ç¼è¯å¨ç´æ¥çæææ¯ï¼ä½¿ç¨åºçæ§è¡æ§è½è¿è¿é«äºå
¶å®äº§åçæçç¨åºãå®è¿æ¯çæ£çé¢å对象çç¼ç¨è¯è¨ãPASCALè¯è¨ç严谨å ä¸å¯è§åçä¼å¿å强大çæ°æ®åºåè½ä½¿å¾å®æå
åçèµæ¬å微软çVBå«æ¿ã许å¤äººå½æ¶é½è®¤ä¸ºPascal æ¯ææåéçç¨åºè®¾è®¡è¯è¨ï¼å¹¶é¢æµDelphiå°ä¼æ为å¯è§åç¼ç¨ç主æµç¯å¢ã
ããDelphiå¨ä½ ç¼å¥½ç¨åºåèªå¨è½¬æ¢æ.EXEæ件å®è¿è¡æ¶é度æ¯VBå¿«ï¼èä¸ç¼è¯åä¸éè¦å
¶ä»çæ¯æåºå°±è½è¿è¡ãå®çæ°æ®åºåè½ä¹æºå¼ºçï¼æ¯å¼åä¸åæ°æ®åºè½¯ä»¶çæ³çç¼ç¨å·¥å
·ã Delphiéç¨äºåºç¨è½¯ä»¶ãæ°æ®åºç³»ç»ãç³»ç»è½¯ä»¶çç±»åçå¼åãèä¸å®æ¥æåVBå·®ä¸å¤ä¸æ ·çåè½ï¼èä¸ä¸æ ·è½åºç¨APIå½æ°ï¼è¿å¨æ§å¶Windowså¾æç¨ã
ããDelphiæ¯å
¨æ°çå¯è§åç¼ç¨ç¯å¢ï¼ä¸ºæ们æä¾äºä¸ç§æ¹ä¾¿ãå¿«æ·çWindowsåºç¨ç¨åºå¼åå·¥å
·ãå®ä½¿ç¨äºMicrosoft Windowså¾å½¢ç¨æ·çé¢ç许å¤å
è¿ç¹æ§å设计ææ³ï¼éç¨äºå¼¹æ§å¯éå¤å©ç¨çå®æ´çé¢å对象ç¨åºè¯è¨(Object-Oriented Language)ãå½ä»ä¸çä¸æå¿«çç¼è¾å¨ãæ为é¢å
çæ°æ®åºææ¯ã对äºå¹¿å¤§çç¨åºå¼å人åæ¥è®²ï¼ä½¿ç¨Delphiå¼ååºç¨è½¯ä»¶ï¼æ çä¼å¤§å¤§å°æé«ç¼ç¨æçï¼èä¸éçåºç¨çæ·±å
¥ï¼æ¨å°ä¼åç°ç¼ç¨ä¸åæ¯æ¯ç¥æ å³çå·¥ä½ââDelphiçæ¯ä¸ä¸ªè®¾è®¡ç»èï¼é½å°å¸¦ç»æ¨ä¸ä»½æ¬£åãã
ããDelphiçåºæ¬å½¢å¼ã
ããDelphiå®é
ä¸æ¯Pascalè¯è¨çä¸ç§çæ¬ï¼ä½å®ä¸ä¼ ç»çPascalè¯è¨æ天壤ä¹å«ãä¸ä¸ªDelphiç¨åºé¦å
æ¯åºç¨ç¨åºæ¡æ¶ï¼èè¿ä¸æ¡æ¶æ£æ¯åºç¨ç¨åºçâ骨æ¶âãå¨éª¨æ¶ä¸å³ä½¿æ²¡æéçä»»ä½ä¸è¥¿ï¼ä»å¯ä»¥ä¸¥æ ¼å°æç
§è®¾è®¡è¿è¡ãæ¨çå·¥ä½åªæ¯å¨â骨æ¶âä¸å å
¥æ¨çç¨åºã缺ççåºç¨ç¨åºæ¯ä¸ä¸ªç©ºç½ççªä½(form)ï¼æ¨å¯ä»¥è¿è¡å®ï¼ç»æå¾å°ä¸ä¸ªç©ºç½ççªå£ãè¿ä¸ªçªå£å
·æWindowsçªå£çå
¨é¨æ§è´¨ï¼å¯ä»¥è¢«æ¾å¤§ç¼©å°ã移å¨ãæ大æå°åçï¼ä½æ¨å´æ²¡æç¼åä¸è¡ç¨åºãå æ¤ï¼å¯ä»¥è¯´åºç¨ç¨åºæ¡æ¶éè¿æä¾ææåºç¨ç¨åºå
±æçä¸è¥¿ï¼ä¸ºç¨æ·åºç¨ç¨åºçå¼åæä¸äºè¯å¥½çåºç¡ã
ããDelphiå·²ç»ä¸ºæ¨å好äºä¸ååºç¡å·¥ä½ââç¨åºæ¡æ¶å°±æ¯ä¸ä¸ªå·²ç»å®æçå¯è¿è¡åºç¨ç¨åºï¼åªæ¯ä¸å¤çä»»ä½äºæ
ãæ¨æéè¦åçï¼åªæ¯å¨ç¨åºä¸å å
¥å®ææ¨æéåè½ç代ç èå·²ã å¨ç©ºç½çªå£çèåï¼åºç¨ç¨åºçæ¡æ¶æ£å¨çå¾
ç¨æ·çè¾å
¥ãç±äºæ¨å¹¶æªåè¯å®æ¥æ¶å°ç¨æ·è¾å
¥åä½ä½ååºï¼çªå£é¤äºååºWindowsçåºæ¬æä½(移å¨ã缩æ¾ç)å¤ï¼å®åªæ¯æ¥åç¨æ·çè¾å
¥ï¼ç¶åå忽ç¥ãDelphiæWindowsç¼ç¨çåè°ãå¥æå¤ççç¹å¤è¿ç¨é½æ¾å¨ä¸ä¸ªä¸å¯è§çRomulamè¦çç©ä¸é¢ï¼è¿æ ·æ¨å¯