図解で学ぶ Spring MVC / Architecture of Spring MVC

by otty375

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ਤղͰֶͿ Spring MVC 2019/08/28 JSUGษڧձ 2019ͦͷ8 Spring for Beginner #jsug ͍͚ @otty_375

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ࣗݾ঺հ • ͍͚ʢ@otty_375ʣ • ITاۀͰWebγεςϜ։ൃӡ༻ • Springྺ͸2೥΄Ͳ

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ࠓ೔ͷΰʔϧ • Spring MVC ͷΞʔΩςΫνϟ͕ΠϝʔδͰ͖Δ • Spring MVC ͷجຊతͳ࣮૷ํ๏͕ཧղͰ͖Δ ʘࠓޙSpring MVC Λֶश͢Δ্Ͱͷ౔୆ʹͳΕ͹ʗ

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ΞδΣϯμ 1. Spring MVC ͱ͸ 2. Spring MVC ͷΞʔΩςΫνϟ 3. Spring MVC ͷجຊతͳ࣮૷ํ๏ 4. Spring MVC ͷͦͷଞͷػೳ 5. ·ͱΊ

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Spring MVC ͱ͸

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Spring MVC ͱ͸ • WebΞϓϦέʔγϣϯΛ։ൃ͢Δࡍʹར༻͢Δ ϑϨʔϜϫʔΫ • ϑϩϯτίϯτϩʔϥύλʔϯΛ࠾༻ • ϦΫΤετϚοϐϯάͳͲΛΞϊςʔγϣϯΛ ར༻ͯ͠ઃఆͰ͖Δ

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ϑϩϯτίϯτϩʔϥύλʔϯ • શͯͷϦΫΤετͷΤϯτϦʔϙΠϯτͱͯ͠ ϑϩϯτίϯτϩʔϥΛ࢖༻͢Δ • ద੾ͳ໾ׂͷΦϒδΣΫτʹॲཧΛҕৡ͢Δ • ϝϦοτɿϦΫΤετʹؔ͢Δॲཧͷڞ௨Խ

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Spring MVC ͷ ΞʔΩςΫνϟ

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ॲཧͷྲྀΕ ҎԼͷαϯϓϧΞϓϦΛྫʹઆ໌͠·͢ • ϦΫΤετɿ/greet [GET] • Ϩεϙϯεɿgreet.html • ࣌ؒଳʹΑͬͯҟͳΔݴ༿Λฦ͢

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Spring MVC ͷΞʔΩςΫνϟ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶃ ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ։ൃऀ͕࣮૷͢Δ෦෼ Spring MVC ಺෦ ᶌ ᶎ ᶍ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD

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ॲཧͷྲྀΕ ͦͷ̍ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ ᶎ ᶍ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ

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DispatcherServlet • શͯͷϦΫΤετͷΤϯτϦʔϙΠϯτͱͳΔ αʔϒϨοτΫϥε • ༷ʑͳ໾ׂͷΠϯλʔϑΣʔεΛݺͼग़ͯ͠ ϑϨʔϜϫʔΫશମΛ੍ޚ͍ͯ͠Δ

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ॲཧͷྲྀΕ ͦͷ̍ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ ᶎ ᶍ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ΫϥΠΞϯτ ʮHSFFUΛऔಘ͍ͨ͠Ͱ͢ʯ %JTQBUDIFS4FSWMFU ʮྃղͰ͢ʯ

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ॲཧͷྲྀΕ ͦͷ̎ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ᶍ ᶎ

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HandlerMapping • ࢖༻͢ΔHandlerΛಛఆ͢Δ໾ׂͷ ΠϯλʔϑΣʔε • ύε΍HTTPϝιουͳͲΛݩʹɹɹ ͲͷHandlerΛݺͼग़͔͢ಛఆ͢Δ

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Handler • ϦΫΤετʹର͢Δ۩ମతͳॲཧΛߦ͏໾ׂ • ։ൃऀ͕࣮૷͢Δ෦෼ • ϦΫΤετύε΍HTTPϝιουͳͲͷɹɹɹ ϚοϐϯάઃఆΛߦ͏

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ॲཧͷྲྀΕ ͦͷ̎ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ᶍ ᶎ )BOEMFS.BQQJOH ʮ(SFFU$POUSPMMFSͷHSFFUϝιουͰ͢ʯ Ͳͷ)BOEMFS͔ʁ ύε )551ϝιου ύϥϝʔλ )FMMP$POUSPMMFS ͷIFMMPϝιου IFMMP (&5 ͳ͠ (SFFU$POUSPMMFS ͷHSFFUϝιου HSFFU (&5 ͳ͠ ʜ ʜ ʜ ʜ %JTQBUDIFS4FSWMFU ʮHSFFUͷ(&5ϝιουͷ)BOEMFSΛ ڭ͍͑ͯͩ͘͞ʯ

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ॲཧͷྲྀΕ ͦͷ̏ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ᶍ ᶎ

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HandlerAdapter • HandlerΛݺͼग़͢໾ׂͷΠϯλʔϑΣʔε • ݺͼग़͠લޙʹదٓඞཁͳॲཧΛߦ͏ • ϦΫΤετϘσΟΛJavaΦϒδΣΫτʹม׵ • Bean Validation ͳͲ

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Handler • ϦΫΤετʹର͢Δ۩ମతͳॲཧΛߦ͏໾ׂ • ViewΛ࢖༻͢Δ৔߹ɺ໭Γ஋͸Viewͷ໊લΛ ฦ͠ը໘ͷදࣔʹඞཁͳσʔλ͸Modelͷதʹ ٧Ίͯฦ͢

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Model • Handler͔ΒViewςϯϓϨʔτʹ஋Λड͚౉͢ ͨΊʹར༻͞ΕΔΠϯλʔϑΣʔε • Modelͷதͷ৘ใ͸View͕ݟΕΔҐஔʹஔ͔Ε Viewͷ૊Έཱͯʹ࢖ΘΕΔ

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ॲཧͷྲྀΕ ͦͷ̏ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ )BOEMFS"EBQUFS ʮඞཁͳલॲཧ͸͓͍ͯͨ͠ͷͰ ॲཧΑΖ͓͘͠ئ͍͠·͢ʯ ᶍ ᶎ ᶆ %JTQBUDIFS4FSWMFU ʮ(SFFU$POUSPMMFSͷHSFFUϝιουͷ ݺͼग़͠Λ͓ئ͍͠·͢ʯ

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ॲཧͷྲྀΕ ͦͷ̏ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ )BOEMFS ʮॲཧऴΘΓ·ͨ͠ 7JFXͷ໊લ͸HSFFUͰ͢ ඞཁͳσʔλ͸.PEFMʹ٧Ί͓͖ͯ·ͨ͠ʯ ᶍ ᶎ .PEFM message = "hello" ᶉ )BOEMFS"EBQUFS ʮඞཁͳޙॲཧ͸͓͖ͯ͠·ͨ͠ 7JFXͷ໊લ͸HSFFUͰ͢ʯ .PEFM

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ॲཧͷྲྀΕ ͦͷ̐ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ᶍ ᶎ

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ViewResolver • Handler͔Βฦ٫͞ΕͨView໊ΛݩʹɺView ͷ࣮૷ΫϥεΛಛఆ͠Viewͷ׬શύεΛฦ͢ ໾ׂ

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ॲཧͷྲྀΕ ͦͷ̐ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ᶍ 7JFX3FTPMWFS ʮUFNQMBUFTHSFFUIUNMͰ͢ʯ ᶎ ᶊ %JTQBUDIFS4FSWMFU ʮ7JFX໊͕HSFFUͳͷͰ͕͢ ۩ମతͳύεΛڭ͍͑ͯͩ͘͞ʯ

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ॲཧͷྲྀΕ ͦͷ̑ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ ᶎ ᶍ

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View • Ϩεϙϯεσʔλͷੜ੒Λߦ͏໾ׂ • ModelͷதͷσʔλΛࢀরͯ͠ςϯϓϨʔτ ʹຒΊࠐΉ

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ॲཧͷྲྀΕ ͦͷ̑ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ 7JFX ʮ.PEFMͷσʔλͱUFNQMBUFTHSFFUIUNM Λ࢖ͬͯϨεϙϯεΛੜ੒͠·͢ʯ ᶎ ᶍ .PEFM message = "hello"

ᶌ %JTQBUDIFS4FSWMFU ʮϨεϙϯεͷੜ੒Λ ͓ئ͍͠·͢ʯ

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ॲཧͷྲྀΕ ͦͷ̑ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ᶌ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD ᶃ %JTQBUDIFS4FSWMFU ʮϨεϙϯεͱͯ͠HSFFUIUNMΛฦ͠·͢ʯ ᶎ ᶍ 7JFX ʮϨεϙϯε͕׬੒͠·ͨ͠ʯ ᶍ

hello

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Spring MVC ͷ جຊతͳ࣮૷ํ๏

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جຊతͳ࣮૷ํ๏ Spring BootΛ࢖༻͢Δ৔߹Λྫʹ͠·͢ 1. Spring MVCͷґଘ௥Ճ 2. Controller࣮૷ 3. View࣮૷

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• Mavenͷ৔߹ɿpom.xmlͷdependenciesʹ௥Ճ 1. Spring MVC ͷґଘ௥Ճ org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-thymeleaf

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2. Controller࣮૷ package com.example.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class GreetController { @GetMapping("/greet") public String greet(Model model) { String message = getGreetMessage(); model.addAttribute("message", message); return "greet"; } } GreetController.java

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2. Controller࣮૷ ͦͷ̍ package com.example.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class GreetController { @GetMapping("/greet") public String greet(Model model) { String message = getGreetMessage(); model.addAttribute("message", message); return "greet"; } } GreetController.java #FBOొ࿥͢ΔͨΊʹ Ϋϥεʹ!$POUSPMMFSΛ෇༩͢Δ

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2. Controller࣮૷ ͦͷ̎ package com.example.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class GreetController { @GetMapping("/greet") public String greet(Model model) { String message = getGreetMessage(); model.addAttribute("message", message); return "greet"; } } GreetController.java ϦΫΤετͱͷϚοϐϯάઃఆΛ ϝιουʹ෇༩͢Δ ଞʹ͸!1PTU.BQQJOH !1VU.BQQJOHͳͲ

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2. Controller࣮૷ ͦͷ̐ package com.example.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class GreetController { @GetMapping("/greet") public String greet(Model model) { String message = getGreetMessage(); model.addAttribute("message", message); return "greet"; } } GreetController.java 7JFXͰ࢖༻͢ΔσʔλΛηοτ͢ΔͨΊͷ .PEFMΛҾ਺Ͱड͚औΔ

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2. Controller࣮૷ ͦͷ̏ package com.example.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class GreetController { @GetMapping("/greet") public String greet(Model model) { String message = getGreetMessage(); model.addAttribute("message", message); return "greet"; } } GreetController.java ඞཁͳϏδωεϩδοΫΛ࣮૷ ʢ͜͜Ͱ͸ݱࡏ࣌ࠁʹԠͯ͡ҟͳΔϝοηʔδΛ ฦ͢Α͏ͳϝιουʣ

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2. Controller࣮૷ ͦͷ̑ package com.example.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class GreetController { @GetMapping("/greet") public String greet(Model model) { String message = getGreetMessage(); model.addAttribute("message", message); return "greet"; } } GreetController.java 7JFX໊Λฦ͢

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3. View࣮૷ Greet

greet.html ʢςϯϓϨʔτΤϯδϯɿThymeleafʣ

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3. View࣮૷ Greet

greet.html ʢςϯϓϨʔτΤϯδϯɿThymeleafʣ )BOEMFSͰฦ٫͞ΕΔ7JFX໊ʹରԠ͢ΔϑΝΠϧΛ ࡞੒

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3. View࣮૷ Greet

greet.html .PEFMʹηοτ͞ΕΔ஋ΛຒΊࠐΉهࡌ ʢ͜ͷ৔߹͸ల։͞ΕΔͱ QIFMMPQͷΑ͏ʹͳΔʣ ʢςϯϓϨʔτΤϯδϯɿThymeleafʣ

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ิ଍ɿඞཁͳConfiguration • ࠓճ͸Spring BootͷAutoConfigurationػೳʹ ΑΓɺඞཁͳConfigurationͳͲ͸Spring Boot ͕༻ҙ͍ͯ͠ΔσϑΥϧτͷ΋ͷΛ࢖༻͢Δ͜ ͱͱ͠·͢

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ิ଍ɿSpring Initializr • Spring Boot ϓϩδΣΫτͷ਽ܗΛੜ੒Ͱ͖Δ • ࠷ॳ͔ΒDependenciesʹ௥Ճ͢Δ͜ͱ͕Մೳ • https://start.spring.io/ •

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ิ଍ɿRestController • REST APIͷ৔߹͸@RestControllerΛ࢖༻ • ϝιουͷ໭Γ஋͸View໊Ͱ͸ͳ͘ɹɹɹ JavaΦϒδΣΫτͳͲͷϨεϙϯεϘσΟ • JavaΦϒδΣΫτ <-> JSON ͷม׵͸ HandlerAdapterͷ෦෼ͰߦΘΕΔ

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Spring MVC ͷ ͦͷଞͷػೳ

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Spring MVC ͷͦͷଞͷػೳ • ҎԼͷΑ͏ͳجຊతͳػೳ΋͋Γ·͢ • όϦσʔγϣϯ • ྫ֎ϋϯυϥ • RESTΫϥΠΞϯτʢRestTemplateʣ • ςετʢMockMvcʣ ͳͲ

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Spring MVC ͷͦͷଞͷػೳ • ҎԼͷΑ͏ͳԠ༻తͳػೳ΋͋Γ·͢ • ηογϣϯͰͷσʔλ؅ཧ • ඇಉظॲཧ • ࠃࡍԽɹͳͲ

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·ͱΊ

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Spring MVC ·ͱΊ • WebΞϓϦέʔγϣϯΛ։ൃ͢Δࡍʹར༻͢Δ ϑϨʔϜϫʔΫ • DispatcherServlet͕શϦΫΤετͷΤϯτϦʔ ϙΠϯτͰϑϨʔϜϫʔΫશମΛ੍ޚ͍ͯ͠Δ • ϦΫΤετϚοϐϯάͳͲΛΞϊςʔγϣϯΛ ར༻ͯ͠ઃఆͰ͖Δ

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Spring MVC ͷΞʔΩςΫνϟ %JTQBUDIFS 4FSWMFU )BOEMFS.BQQJOH ᶃ ᶄ ᶅ ᶆ ᶇ ᶈ ᶉ ᶊ ᶋ ։ൃऀ͕࣮૷͢Δ෦෼ Spring MVC಺෦ ᶌ ᶎ ᶍ )BOEMFS"EBQUFS 7JFX3FTPMWFS 7JFX )BOEMFS IUNMFUD

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ࢀߟࢿྉ

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ࢀߟࢿྉʢॻ੶ʣ • Springపఈೖ໳ʢגࣜձࣾNTTσʔλ / ஶʣ

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ࢀߟࢿྉʢWebʣ • Spring ެࣜαΠτ • https://spring.io/ • ॳΊͯͰ΋30෼Ͱ෼͔ΔSpring 5 & Spring Boot 2Φʔ όʔϏϡʔ • https://www.slideshare.net/ masatoshitada7/30spring-5-spring- boot-2-103523666

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EOP