Springで始める3層アーキテクチャ / start three layer architecture with spring

4QSJOHͰ࢝ΊΔ૚ΞʔΩςΫνϟ

૚ͱ͸

ϓϨθϯςʔγϣϯ૚ σʔλΞΫηε૚ ϏδωεϩδοΫ૚

ϓϨθϯςʔγϣϯ૚

ը໘ͩͬͨΓɺ"1*ͷΤϯυϙΠϯτͩͬͨΓ ར༻ऀͱͷڥքɺΠϯλϑΣʔεʹͳΔ෦෼

σʔλΞΫηε૚

σʔλͷӬଓԽɺ࠶ߏ੒Λߦ͏࢓૊Έʢ%# ͱ͔ϑΝΠϧͱ͔ʣͱͷ΍ΓऔΓΛߦ͏૚

ϏδωεϩδοΫ૚

ۀ຿ͷϩδοΫΛهड़͢Δ૚

ʁʁʁ

ۀ຿ͱ͸

ۀ຿ ˠͦͷΞϓϦέʔγϣϯͰղܾ͍ͨ͠໰୊ ˠଟذʹΘͨΔʹෳࡶ

IUUQTXXXTMJEFTIBSFOFUNBTVEBTT

݁ہҰ൪ूத͍ͨ͠ͷ͸ۀ຿ͷ಺༰͔ͩΒ ೖग़ྗ͔Β෼཭ִͯ͠཭͠·͠ΐ͏ͱ͍͏࿩

4QSJOHͰ͍͏ͱ

!$POUSPMMFS !3FTU$POUSPMMFS !3FQPTJUPSZ !4FSWJDF

࣮ફ

ίϝϯτΛॻ͖ࠐΊΔϝϞாΛߟ͑Δ ʢߦͷ్தʹίϝϯτೖΕͯ΋ແࢹ͢Δʣ ಺༰Λॻ͚Δ ೖྗ಺༰ΛอଘͰ͖Δ ίϝϯτ͕ফ͑ͨঢ়ଶͰ಺༰͕ݟΕΔ

package com.yachiy.spring.introduction.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; @Controller public class MemoController
{ @GetMapping("/") public String memo() { return "memo"; } } .FNP$POUSPMMFSKBWB

<!doctype html> <html> <head> <meta charset="UTF-8"/> <title>ίϝϯτΞ΢τ͕ޮ͘ϝϞாʢԾʣ</title> </head> <body> <h1>ίϝϯτΞ΢τ͕ޮ͘ϝϞாʢԾʣ</h1>
<textarea id="content" cols="50" rows="20" placeholder="಺༰Λೖྗ͍ͯͩ͘͠͞"></textarea> <button>ૹ৴</button> </body> </html> NFNPIUNM

࣮ߦͯ͠MPDBMIPTUʹΞΫηε

ը໘͸ग़Δʢೖྗͯ͠ૹ৴ͯ͠΋Կ΋ى͜Βͳ͍͚Ͳʣ

࣍ʹೖྗ஋ͷड͚औΓ

package com.yachiy.spring.introduction.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping;
@Controller public class MemoController { @GetMapping("/") public String memo() { return "memo"; } @PostMapping("/") public String receive(MemoForm memoForm, Model model) { model.addAttribute("content", memoForm.getContent()); return "received"; } } .FNP$POUSPMMFSKBWB 1045ͷ݁ՌΛड͚औΔϝιουΛ ௥Ճ

package com.yachiy.spring.introduction.controller; /** * ϝϞ಺༰Λड͚౉ͨ͢ΊͷϞσϧ */ public class MemoForm {
private String content; public String getContent() { return content; } public void setContent(String content) { this.content = content; } } .FNP'PSNKBWB

<!doctype html> <html xmlns:th="http://www.w3.org/1999/xhtml"> <head> <meta charset="UTF-8"/> <title>݁Ռ</title> </head> <body>
<h1>಺༰Λड͚औΓ·ͨ͠</h1> <div th:text="${content}"></div> </body> </html> SFDFJWFEIUNM

<!doctype html> <html> <head> <meta charset="UTF-8"/> <title>ίϝϯτΞ΢τ͕ޮ͘ϝϞாʢԾʣ</title> </head> <body> <h1>ίϝϯτΞ΢τ͕ޮ͘ϝϞாʢԾʣ</h1>
<form method="post" action="/"> <textarea id="content" name="content" cols="50" rows="20" placeholder="಺༰Λೖྗ͍ͯͩ͘͠͞"></textarea> <button>ૹ৴</button> </form> </body> </html> NFNPIUNM GPSNλά௥Ճ .FNP'PSNͷϑΟʔϧυ໊ͱҰகͤ͞Δ

࣮ߦͯ͠MPDBMIPTUʹΞΫηε

ೖྗͯ͠ ԡԼ

ೖྗ಺༰͕൓ө͞Ε͍ͯΔ

࣍อଘͱ֬ೝʢϝϞாͳͷͰʣ

͚ͩͲ%#Λ༻ҙ͢Δͷ͸݁ߏେมʜ ˠࠓճ͸ϝϞϦ্ʹอଘ͢ΔΑ͏࣮૷

͡Ό࣮͋ࡍ%#࢖͏Α͏ʹͳͬͨΒ ৭ʑͳॴஔ͖׵͑ͳ͖Ό͍͚ͳ͍ͷʁ ˠ%*ͷ࢓૊ΈΛ࢖ͬͯӬଓԽͷೖग़ྗͷϩδοΫ͚ͩ ஔ͖׵͑Ε͹ॅΉΑ͏ʹ࣮૷͢Δ

package com.yachiy.spring.introduction.dao; public interface MemoDao { /** * ϝϞ಺༰ΛӬଓԽ͠ϝϞIDΛฦ٫͢Δ. *
* @param content ಺༰ * @return ϝϞID */ int store(String content); /** * IDΛࢦఆͯ͠ϝϞ಺༰Λऔಘ͢Δ. * * @param id ϝϞID * @return ϝϞ಺༰ */ String findById(int id); } .FNP%BPKBWB ϝϞΛӬଓԽ࠶ߏ੒͢ΔͨΊͷΠϯλϑΣʔε

package com.yachiy.spring.introduction.dao; import org.springframework.stereotype.Repository; import java.util.ArrayList; import java.util.List; @Repository public
class InMemoryMemoDao implements MemoDao { private static final List<String> memoList = new ArrayList<>(); @Override public int store(String content) { memoList.add(content); return memoList.size(); } @Override public String findById(int id) { return memoList.get(id - 1); // 0࢝·ΓͳͷͰ-1 } } *O.FNPSZ.FNP%BPKBWB ϝϞϦ্Ͱ.FNP%BPͷڍಈΛ࣮ݱ͢Δ࣮૷Ϋϥε %*ίϯςφʹొ࿥

package com.yachiy.spring.introduction.controller; import com.yachiy.spring.introduction.dao.MemoDao; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; @Controller public class MemoController { private MemoDao memoDao; @Autowired public MemoController(MemoDao memoDao) { this.memoDao = memoDao; } @GetMapping("/") public String memo() { return "memo"; } @PostMapping("/") public String receive(MemoForm memoForm, Model model) { int memoId = memoDao.store(memoForm.getContent()); model.addAttribute("memoId", memoId); return "received"; } @GetMapping("/{memoId}") public String view(@PathVariable int memoId, Model model) { String content = memoDao.findById(memoId); model.addAttribute("content", content); return "view"; } } .FNP$POUSPMMFSKBWB %FQFOEFODZ*OKFDUJPO ύε͔Β஋Λऔಘ

<!doctype html> <html xmlns:th="http://www.w3.org/1999/xhtml"> <head> <meta charset="UTF-8"/> <title>݁Ռ</title> </head> <body>
<h1>಺༰Λड͚औΓ·ͨ͠</h1> <div>ϝϞIDɿ</div> <div th:text="${memoId}"></div> </body> </html> SFDFJWFEIUNM <!doctype html> <html xmlns:th="http://www.w3.org/1999/xhtml"> <head> <meta charset="UTF-8"/> <title>಺༰</title> </head> <body> <div th:text="${content}"></div> </body> </html> WJFXIUNM

!3FQPTJUPSZ ӬଓԽͷͨΊͷ࣮૷Λ%*ίϯςφʹొ࿥ ͢ΔͨΊͷΞϊςʔγϣϯ

%*ίϯςφ %FQFOEFODZ*OKFDUJPO͍࣮ͨ͠૷Λొ࿥ ͓ͯ͘͠৔ॴ

!"VUPXJSFE %*ίϯςφ͔Β౰ͯ͸·Δ࣮૷Λ஫ೖ͢Δ ͨΊͷΞϊςʔγϣϯ

ʁʁʁ

ԿΛ͍͔ͨ͠

$POUSPMMFSͷཱ৔͔Β͢Δͱʜ ˠड͚औͬͨϝϞͷ಺༰ͷӬଓԽΛґཔ͍ͨ͠ɻ ˠӬଓԽઌ͸%#Ͱ΋ϑΝΠϧͰ΋ϝϞϦ্Ͱ΋΄͍͠ͱ͖ʹऔΓग़ͤΕ͹ Ͳ͜Ͱ΋͍͍ɻ ˠ࣮૷ʹґଘͨ͘͠ͳ͍ ˠΠϯλϑΣʔε͚ͩ஌͍ͬͯͨ ˠద੾ͳ࣮૷Λউखʹࠩ͠ࠐΜͰ΄͍͠ ґଘੑٯసͷ๏ଇ

ґଘੑΛٯసΠϯλϑΣʔεʹ౰ͯ͸·Δ࣮ ૷Λࠩ͠ࠐΉ ˠ%FQFOEFODZ*OKFDUJPO

͡Ό͋ԿΛࠩ͠ࠐΉ͔ ˠ%*ίϯςφʹొ࿥͞Ε͍ͯΔ΋ͷͷͳ͔͔Βͦ ͷΠϯλʔϑΣʔεΛ࣮૷͍ͯ͠Δ΋ͷΛࠩ͠ࠐΉ ͳͷͰಉ͡ΠϯλʔϑΣʔεΛ࣮૷͍ͯ͠Δ΋ ͷ͸͔̍ͭ͠%*ίϯςφʹొ࿥Ͱ͖ͳ͍

ϝϞϦʹอଘ͢Δͷ͸΍Ίͯ .Z42-Λ࢖͍͍ͨ৔߹

package com.yachiy.spring.introduction.dao; import org.springframework.stereotype.Repository; import java.util.ArrayList; import java.util.List; // @Repository
public class InMemoryMemoDao implements MemoDao { private static final List<String> memoList = new ArrayList<>(); @Override public int store(String content) { memoList.add(content); return memoList.size(); } @Override public String findById(int id) { return memoList.get(id - 1); // 0࢝·Γͳͷ Ͱ-1 } } *O.FNPSZ.FNP%BPKBWB ίϝϯτΞ΢τ package com.yachiy.spring.introduction.dao; import org.springframework.stereotype.Repository; import java.util.ArrayList; import java.util.List; @Repository public class MySQLMemoDao implements MemoDao { @Override public int store(String content) { JdbcTemplate …. } @Override public String findById(int id) { JdbcTemplate …. } } .Z42-.FNP%BPKBWB ͪ͜ΒΛ%*ίϯςφʹొ࿥

package com.yachiy.spring.introduction.controller; import com.yachiy.spring.introduction.dao.MemoDao; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; @Controller public class MemoController { private MemoDao memoDao; @Autowired public MemoController(MemoDao memoDao) { this.memoDao = memoDao; } @GetMapping("/") public String memo() { return "memo"; } @PostMapping("/") public String receive(MemoForm memoForm, Model model) { int memoId = memoDao.store(memoForm.getContent()); model.addAttribute("memoId", memoId); return "received"; } @GetMapping("/{memoId}") public String view(@PathVariable int memoId, Model model) { String content = memoDao.findById(memoId); model.addAttribute("content", content); return "view"; } } .FNP$POUSPMMFSKBWB มߋҰ੾ͳ͠

ಈ͔ͯ͠ΈΔ

CPPU3VOͯ͠MPDBMIPTUʹΞΫηε

อଘ͞ΕͨϝϞͷ*%

MPDBMIPTU\NFNP*E^ʹΞΫηε

ϝϞͷ಺༰͕ग़ྗ͞Εͯ ͍Δ͜ͱΛ֬ೝ

ೖग़ྗ͸0,

΍ͬͱۀ຿ϩδοΫ

ࠓճͷۀ຿ ίϝϯτΛফ͢

ίϝϯτΛফ͢λΠϛϯά͸ͲͪΒ͕ྑͦ͞͏͔ อଘ͢Δͱ͖ʹίϝϯτΛফ͔ͯ͠Βอଘ ͢Δ ੜσʔλΛอଘͯ͠ϝϞΛ֬ೝ͢Δͱ͖ʹ ίϝϯτΛফ͢

อଘ࣌ʹίϝϯτΛফ͢ύλʔϯ ౎౓ίϝϯτΛফ͢ॲཧ͕ͳͯ͘ࡁΉʢελΠϧ ౰ͯΔͷ͸อଘ࣌ͷΈʣ ੜσʔλͷ֬ೝ͸ෆՄ औಘ࣌ʹίϝϯτΛফ͢ύλʔϯ ੜσʔλΛ֬ೝͰ͖Δ ֬ೝͷͨͼʹίϝϯτΛফ͢ඞཁ͕͋Δ

࣮ࡍʹۀ຿ͷࠓޙΛߟ͑Δͱʜ ฤूػೳཉ͘͠ͳΓͦ͏ ˠͦͷͱ͖ʹ͸ੜσʔλͰฤू͍ͨ͠ ˠίϝϯτΛফͯ͠อଘ͢Δͱͦͷ৘ใ͸ࣦΘ Εͯ͠·͏ ˠࠓճͷۀ຿Ͱ͸ফͨ͠ঢ়ଶͰอଘͯ͠͸͍͚ ͳ͍

ͲͬͪͰ΋͍͍৔߹͸޷Έ ʢˍνʔϜͰͷܾΊ໰୊ʣ

package com.yachiy.spring.introduction.service; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public class
CommentOutService { public String execute(String content) { List<String> lines = Arrays.asList(content.split("\r\n")); List<String> markUpList = lines.stream() .map(this::commentOut) .collect(Collectors.toList()); return String.join("\r\n", markUpList); } private String commentOut(String content) { if (content.matches("//.+")) { return ""; } return content; } } $PNNFOU0VU4FSWJDFKBWB

package com.yachiy.spring.introduction.controller; import com.yachiy.spring.introduction.dao.MemoDao; import com.yachiy.spring.introduction.service.CommentOutService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller;
import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; @Controller public class MemoController { private MemoDao memoDao; @Autowired public MemoController(MemoDao memoDao) { this.memoDao = memoDao; } @GetMapping("/") public String memo() { return "memo"; } @PostMapping("/") public String receive(MemoForm memoForm, Model model) { int memoId = memoDao.store(memoForm.getContent()); model.addAttribute("memoId", memoId); return "received"; } @GetMapping("/{memoId}") public String view(@PathVariable int memoId, Model model) { String content = memoDao.findById(memoId); model.addAttribute("content", new CommentOutService().execute(content)); return "view"; } } .FNP$POUSPMMFSKBWB ίϝϯτΞ΢τͷۀ຿ ϩδοΫΛݺग़

CPPU3VOͯ͠MPDBMIPTUʹΞΫηε

MPDBMIPTU\NFNP*E^ʹΞΫηε

ίϝϯτ͕ফ͍͑ͯΔ͜ͱ Λ֬ೝ

૚ΞʔΩςΫνϟΛ࣮ݱͰ͖ͨ

େࣄͳͷ͸֤૚ͷ໾ׂ͕ଞͷ૚ʹછΈग़͞ ͳ͍͜ͱ ಛʹۀ຿ϩδοΫ͸ଞͷ૚ʹછΈग़͕ͪ͠ ͳͷͰҙࣝͯ͠ઃܭ͢Δ

Springで始める3層アーキテクチャ / start three layer architecture with spring

Springで始める3層アーキテクチャ / start three layer architecture with spring

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