Webãµã€ãã®ããã°ã©ãã³ã°ã«ãããŠãMVCã¢ãã«ã¯ç¥ã£ãŠããããæŠå¿µã§ãããã®èšäºã§ã¯ãã©ãããŠãããéèŠãªã®ãïŒã©ã®ããã«åœ¹ã«ç«ã€ã®ãïŒã詳ãã説æããŸãã
1. MVCã¢ãã«ãšã¯ïŒ

MVCã¯Model View Controllerã®ç¥ã§ãã – åºå ž: Medium
MVCã¯ãModel-View-Controllerã®ç¥ã§ããœãããŠã§ã¢ãšã³ãžãã¢ãªã³ã°ã§äœ¿çšãããMVCèšèšã¢ãã«ã§ãã ãŸãããã®èšèšã¢ãã«ã«ããã管çãéçºãããã³ä¿å®ã«ãã£ãŠã€ã³ã¿ãŒãã§ã€ã¹ãšã³ãŒããåããããšãã§ããŸãã
MVCã¢ãã«ã¯ãã¢ããªã±ãŒã·ã§ã³ã3ã€ã®çžäºéçšå¯èœãªéšåã«åå²ãããããããä»ã®ã³ã³ããŒãã³ããšã¯å¥ã«ç¬ç«ããŠç¬èªã®ã¿ã¹ã¯ãæã¡ãŸã:
- ã¢ãã«ïŒModelïŒã¯ç®¡çãããŒã¿åŠçã§æ©èœãã
- ãã¥ãŒïŒViewïŒã¯ã€ã³ã¿ãŒãã§ã€ã¹ããŠãŒã¶ãŒãžã®ããŒã¿è¡šç€ºãåŠçãã
- ã³ã³ãããŒã©ïŒControllerïŒã¯ã¢ãã«ãšãã¥ãŒã®éã§çžäºäœçšãã
Javaããã°ã©ãã³ã°ã«ãããŠãMVCã®ã¢ãã«ã¯åäžã®Javaã¯ã©ã¹ãææããŠããããã¥ãŒã®æ©èœã¯ããŒã¿ã衚瀺ããããšã§ãããã³ã³ãããŒã©ãŒã«ã¯ãµãŒãã¬ãããå«ãŸããŠããŸãã ãããã®åé¢ãããã¯ã©ã¹ã¯ããŠãŒã¶ãŒèŠä»¶ãåŠçã«å°ããŸã:
- ã¯ã©ã€ã¢ã³ãåŽã®ãã©ãŠã¶ã¯ã©ã¹ã¯ããµãŒããŒã«è¡šç€ºãããããŒãžã®èŠä»¶ãã³ã³ãããŒã©ã¬ã€ã€ãŒã«éä¿¡ããŸãã
- ã³ã³ãããŒã©ãŒã¯ããã®ããã«ããŠã¢ãã«ãåŒã³åºããèŠä»¶ãæºããããã«å¿ èŠãªããŒã¿ããšã¯ã¹ããŒãããã¢ã¯ãã£ããã£ã瀺ããŸãã
- 次ã«ãã³ã³ãããŒã©ãŒã¯ãšã¯ã¹ããŒããããããŒã¿ããŒã¹ããã¥ãŒã«éä¿¡ããŸã
- 4.ãããŠããã¥ãŒã¯ã¬ã³ããªã³ã°ããã衚瀺ããããã«ãã©ãŠã¶ã®ã¯ã©ã€ã¢ã³ãã«ãªãã€ã¬ã¯ããããŸãã
++MVCã¢ãŒããã¯ãã£ã®åªããã¢ã€ãã¢ãšèšãããŠããã®ã¯ããœãããŠã§ã¢ã¢ããªã±ãŒã·ã§ã³ãïŒã€ã®ããŒãã«åãããŠããããšã§ããããã«ãããéçºè ã«ãšã£ãŠã以äžã®ãããªå©ç¹ããããŸã:
- ã¢ãã«ããã¥ãŒãã³ã³ãããŒã©ãŒãå«ã3ã€ã®ã¬ã€ã€ãŒã§åæã«çšŒåããŸãã
- MVCã¢ãŒããã¯ãã£ã«ããæ¡åŒµã§ãããããã¢ããªã±ãŒã·ã§ã³ã远å ã§ããŸãã
- ã³ã³ããŒãã³ãã®äŸåé¢ä¿ã¯æµ ããéçºè ã¯ç°¡åã«ä¿å®ã§ããŸãã
- ã³ãŒãã®åå©çšæ§ããããããè€æ°ã®ãã¥ãŒã§ã¢ãã«ãäœåºŠã䜿çšã§ããŸãã
- ã¢ããªã±ãŒã·ã§ã³ã¯MVCã«åºã¥ããŠããçè§£ãããããªããŸãã
- ããã«ãã¢ããªã±ãŒã·ã§ã³ã®æ¡åŒµãšãã¹ãã®ããã»ã¹ããããŸã§ã«ãªãç°¡åã§ãã
2. MVCèšèšã¢ãã«ã§ã§ããããšÂ

MVCã¢ãã«ãæ©èœããããã¿ – åºå ž: Cloudboost
MVCã¯äžè¬çã«Webã¢ããªã±ãŒã·ã§ã³ã§äœ¿çšãããŸãã ãããã®ã¢ããªã±ãŒã·ã§ã³ã®ãã¥ãŒã¯ãã¢ããªã±ãŒã·ã§ã³ã«ãã£ãŠçæãããHTMLãŸãã¯XHTMLãã¡ã€ã«ã§ãã
ïŒã³ã³ãããŒã©ãŒã¯ïŒãã©ãŒã ãªã©ã䜿çšããŠïŒå ¥åãåãåããã¢ãã«ã®å ¥åã管çããã³åŠçããŸããã¢ãã«ã«ã¯ãç¹å®ã®ã¿ã¹ã¯ãå®è¡ããããã»ã¹ã«é¢ããããŒã¿ãšã«ãŒã«ãå«ãŸããŠããŸãã
ãªãŒã±ã¹ãã©ãäŸã«ãšã説æããŸãïŒ
- ã³ã³ãããŒã©ã¯ææ®è
-  ã¢ãã«ã¯æŒå¥è
- ãã¥ãŒã¯ãªãŒã±ã¹ãã©ã«ãã£ãŠå®è¡ãããæ²
çŸåšãäžçäžã®ã»ãšãã©ã®ã¢ããªã±ãŒã·ã§ã³ãšWebãµã€ãã¯ãMVCã¢ãã«ã«åŸã£ãŠå±éãããŠããŸãã
ããã«ãã³ã³ããŒãã³ãã¯MVCãã¶ã€ã³ãã¿ãŒã³ã«ãã£ãŠäœæãããäºãã«ç¬ç«ããŠããŸãã ãããã£ãŠãMVCãã¶ã€ã³ãã¿ãŒã³ã¯ãã³ãŒãã®åå©çšãšäžŠåéçºã«åœ¹ç«ã¡ãŸãã ããã«ãããããã°ã©ãã³ã°äœæ¥ãããç°¡åã«ãããç°¡åã«ãããéããªããŸãã
ããŒã¿ã¯ãã¥ãŒã«ãã£ãŠè¿œè·¡ããããŠãŒã¶ãŒãžã®è¡šç€ºçšã«å¶åŸ¡ããããããããã°ã©ããŒã¯åããã¥ãŒãä»ã®ã¢ããªã±ãŒã·ã§ã³ã®ç°ãªãããŒã¿ã§äœ¿çšã§ããŸãã ãŸãã¯ãåãã¢ãã«ãã³ã³ãããŒã©ãŒã䜿çšããŠããã¥ãŒã倿Žããããšãã§ããŸãã ããã¯éçºè ãæé ãªäŸ¡æ Œã®Webãµã€ããäœæããããã«äœ¿çšããæ¹æ³ã§ããã€ãŸããããŸããŸãªã¯ã©ã€ã¢ã³ãåãã«ããã°ã©ãã³ã°ãããšãã«ãå ±æããŒã¹ãšãªã³ã©ã€ã³å€æŽãã¥ãŒãäœæããã ãã§è¯ãã®ã§ãã
3. MVCã¢ãã«ã®äŸ
ãã®ããŒãã§ã¯MVCã¢ãã«ã®èª¬æã®ããã«ãã¬ã¹ãã©ã³ãäŸã«æããŠèª¬æããŸã:
- ã¬ã¹ãã©ã³ã§ã®é£äºãæ³åããŠãã ããã
- ããªããå ¥åºããåŸããŠã§ã€ã¿ãŒã¯æ³šæãåããããã«ããªãã®ããŒãã«ã«è¡ããŸãã圌ãã¯ãæåããªããäœãé£ã¹ãããç¥ããŸããã圌ãã®çŸ©åã¯ããªãèŠæ±ãæžãçããããšã§ãã
- ãã®åŸããŠã§ã€ã¿ãŒã¯æ³šæãããã¡ãã¥ãŒãšããŒãã«çªå·ã沿ããŠã·ã§ãã«äŒããŸãã
- ãããã³ã§ã¯ã·ã§ããé£äºãçšæããŸããå ·äœçã«ã¯ãéèãµã³ãã€ãããæ³šæãããšãã·ã§ãã¯ãã³ããžã£ã¬ã€ã¢ãããŠã¬ã©ã·ãã¿ããã®ãªã©ã®ã³ã³ããŒãã³ãã䜿çšããŸãã
- 調çãçµãããŸããããã®æçã¯ããªãã«å±ããããã«ãŠã§ã€ã¿ãŒã«æž¡ãããŸãã
- çŸåšããŠã§ã€ã¿ãŒã¯ããªããå¿ èŠãšããŠããé£ã¹ç©ãšãã®æºåæ¹æ³ãçè§£ããŠããŸãã
äžèšã®äŸã§ãMVCã¢ãã«ã¯æ¬¡ã®åœ¹å²ã«ãªããŸã:
- ãã¥ãŒ(View)ïŒããªã
- ã³ã³ãããŒã©(Controller)ïŒãŠã§ã€ã¿ãŒ
- ã¢ãã«(Model)ïŒèª¿ç
- ããŒã¿ïŒéã°ãããã®
äžèšã®äŸã§ãJavaã®MVCã¢ãã«ã®åœ¹å²ãç°¡åã«é ã«å ¥ããŠãããŸãããã
4. MVCã¢ãã«ã®ã¡ãªããã»ãã¡ãªãã
MVCèšèšã¢ãã«ã«ã¯èæ ®ãã¹ãã¡ãªããã»ãã¡ãªããããããŸãã
- MCVã¢ãã«ã®ã¡ãªãã:
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2ã€ç®ã«ããªãªãŒã¹åã«ãœãããŠã§ã¢ãšã©ãŒããã§ãã¯ãã¬ãã¥ãŒããããšãã§ããããé«ãå質ãšä¿¡é Œæ§ã確ä¿ã§ããŸãã
3ã€ç®ã«ãå¶åŸ¡æ©èœã¯MVCã¢ãã«ã®å©ç¹ã®1ã€ã§ãããCSSãHTMLãããŸããŸãªåœ¢åŒã®Javascriptãªã©ã®ããã°ã©ãã³ã°èšèªã§åè¶ããã³ã³ãããŒã©ãŒã䜿çšã§ããããã«ãªããŸããããã«ããã¥ãŒãšãµã€ãºãMVCã§éèŠãªåœ¹å²ãæãããŸãã ãã¥ãŒã¯ããŒã¿ãä¿åããããã®å Žæã«ãªããŸãã äœæããããªã¯ãšã¹ããå€ãã»ã©ããã倧ããªãã¡ã€ã«ãäœæãããŸãã äžæ¹ããããã¯ãŒã¯æ¥ç¶ã¯ããŒãã®é床ãäœäžãããŸãã ãã®å ŽåãMVCã¢ãã«ã¯ãæé©ãªæ¹æ³ã§åž¯åå¹ ãç¯çŽããã®ã«åœ¹ç«ã¡ãŸãã
ããã«ãMVCã¢ãã«ã«ã¯SOCæ©èœããããã¢ãã«ãã€ã³ã¿ãŒãã§ãŒã¹ãããŒã¿ãªã©ã®éšåãæç¢ºã«åé¢ã§ããŸãã
ããã«ãMVCã¢ãã«ãçµ±åããå ŽåãWebãµã€ããã©ãããã©ãŒã ã§èªç±ã«ã³ãŒãã£ã³ã°ã§ããŸãã ãã®ãšãããµãŒããŒã¯å€§éã«ãªãããŒããããŸãã
æåŸã«ããã®ã¢ãã«ã¯æ¯èŒçåçŽãªæ§é ã§ãããå°éç¥èãããŸããªããŠã䜿çšã§ããŸãã
- MVCã¢ãã«ã®ãã¡ãªãã:Â
ããã®å¯äžã®æ¬ ç¹ã¯ãå°èŠæš¡ãªãããžã§ã¯ãã«é©çšããå Žåãéçºããã»ã¹ãšããŒã¿è»¢éæéã«æéãšæéããããããšã§ãã
ãããã ã£ãã§ããããïŒMVCã¢ãã«ã¯ã³ãŒãã£ã³ã°ã«éåžžã«åœ¹ç«ã€ç¥èã§ãããã®èšäºã§åºæ¬ãçè§£ããŠããã ããã幞ãã§ãã