Day04(<%@ include %>)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
04include.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ 04include include ์ „ include ํ›„ 04included.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ๋‚˜๋Š” included๋œ jspํŽ˜์ด์ง€ ์ถœ๋ ฅ๋‚ด์šฉ ๋Š”???? ์„ค๋ช… ์„œ๋ฒ„์ธก include ๋ผ๊ณ  ์ƒ๊ฐํ•˜๋ฉด ๋œ๋‹ค ์ฆ‰ ์†Œ์Šค ์‹คํ–‰์ „์— include๊ฐ€ ๋œ๋‹ค๊ณ  ๋ณด์ž ์†Œ์Šค ์‹คํ–‰์ „ ํฌํ•จ๋จ์œผ๋กœ ๋ณ€์ˆ˜๋ฅผ ๊ฐ™์ด ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค ๋™์ ์œผ๋กœ ํŽ˜์ด์ง€ ํ• ๋‹น์„ ํ•  ์ˆ˜๊ฐ€ ์—†๋‹ค. ์ฆ‰ ์ •์ ์ธ ํŽ˜์ด์ง€์— ํ™œ์šฉ๋œ๋‹ค๋Š” ๊ฒƒ ! ์†์„ฑ file : ํฌํ•จ๋  ํŽ˜์ด์ง€๋ฅผ ๋ช…์‹œํ•œ๋‹ค jsp:include VS include file ์ฐจ์ด๋ฅผ ์ž˜ ์ƒ๊ฐํ•  ๊ฒƒ ! ํ™œ์šฉํ•˜๋Š” ๊ณณ์ด ๋‹ค๋ฅผํ…Œ๋‹ˆ !
Day04(jsp:forward)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
03form.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ aoa blackPink 03result.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ํฌ์›Œ๋“œ ๋˜๊ธฐ ์ „ ๋ฐ์ดํ„ฐ ๋‚˜์˜ค๋‚˜ forward๋˜๊ณ  ๋‚˜์„œ ์‹คํ–‰๋˜๋‚˜? aoa.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ member๋ชฉ๋ก : blackPink.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ์ถœ๋ ฅ๋‚ด์šฉ jsp:forwardํƒœ๊ทธ ์‚ฌ์šฉ include๋ž‘ ๋‹ค๋ฅด๊ฒŒ ๋ฒ„ํผ๋ฅผ ๋น„์šฐ๊ณ  ํ•ด๋‹น ํŽ˜์ด์ง€ ์ถœ๋ ฅํ•˜๊ณ  ํŽ˜์ด์ง€๊ฐ€ ๋„˜์–ด๊ฐ„๋‹ค. (03result.jsp์—์„œ ์ƒ๋‹จ๊ณผ ํ•˜๋‹จ์— ์ž…๋ ฅํ•ด๋‘” ํ…์ŠคํŠธ๋“ค์€ ์ถœ๋ ฅ๋˜์ง€์•Š๋Š”๋‹ค. ex) ํฌ์›Œ๋“œ ๋˜๊ธฐ ์ „ ๋ฐ์ดํ„ฐ ๋‚˜์˜ค๋‚˜) formํƒœ๊ทธ์—์„œ ๋ญ˜ ์ž…๋ ฅํ–ˆ๋ƒ์— ๋”ฐ๋ผ ์„œ๋กœ ๋‹ค๋ฅธ ํŽ˜์ด์ง€๋กœ ๋„˜์–ด๊ฐ€๊ฒŒ ๋œ๋‹ค.
Day04(jsp:include๋™์ ํŽ˜์ด์ง€ํ• ๋‹น)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
02form.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ํƒ•์ˆ˜์œก ์ฐ๋จน ๋ถ€๋จน ์ฒ˜๋จน ๋‚˜์˜ ํƒ•์ˆ˜์œก ์ทจํ–ฅ 02other.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ otherํŽ˜์ด์ง€ โ€ป jspํƒœ๊ทธ ์•ˆ์—์„œ๋Š” ์ฃผ์„์„ ์‚ฌ์šฉํ•˜์ง€ ๋ง์ž !!! 02otherInclude.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ otherInclueํŽ˜์ด์ง€ ๋‚ด ํƒ•์ˆ˜์œก ์ทจํ–ฅ : ์„ฑ๊ฒฉ : jsp ํŒŒ๋ผ๋ฏธํ„ฐ ์—†๋‹ค๊ณ  ์ƒ๊ฐํ•˜๊ณ  ํƒ•์ˆ˜์œก ์ทจํ–ฅ์— ๋”ฐ๋ฅธ ์„ฑ๊ฒฉ ์ถœ๋ ฅ๋‚ด์šฉ
Day04(pageModule)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
00main.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ jsp include ์ „ jsp include ํ›„ 00sub.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ๋‚˜๋Š” jsp include ๋œ ํŽ˜์ด์ง€ ๋‚ด์šฉ์ด์•ผ 00main.jsp์˜ ์ถœ๋ ฅ๋‚ด์šฉ 1. ์„ค๋ช… - ์„œ๋ฒ„์ธก include๊ฐ€ ์•„๋‹Œ ํด๋ผ์ด์–ธํŠธ์ธก์˜ include๋ผ ์ƒ๊ฐํ•˜๋ฉด ๊ฐ„๋‹จํ•˜๋‹ค. ์ฆ‰ ์ถœ๋ ฅ ๊ฒฐ๊ณผ๋งŒ(html์ฝ”๋“œ)์„ include ํ•œ๋‹ค - include ๋˜๋Š” ํŽ˜์ด์ง€์™€ ๋ณ€์ˆ˜๋ฅผ ๊ฐ™์ด ์‚ฌ์šฉํ•  ์ˆ˜ ์—†๋‹ค 2. ์†์„ฑ page ํฌํ•จ์‹œํ‚ค๊ณ ์ž ํ•˜๋Š” ๋ฌธ์„œ์˜ ์œ„์น˜๋ฅผ ๋ช…์‹œํ•œ๋‹ค ์ƒ๋Œ€๊ฒฝ๋กœ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์ ˆ๋Œ€๊ฒฝ๋กœ๋„ ๊ฐ€๋Šฅํ•˜๋‹ค ์„œ๋ธ”๋ฆฟ ์ปจํ…Œ์ด๋„ˆ์— ๋”ฐ๋ผ HTML ํŽ˜์ด์ง€๋Š” ์•ˆ๋  ์ˆ˜๋„ ์žˆ๋‹ค get ๋ฐฉ์‹์œผ๋กœ ํŒŒ๋ผ๋ฏธํ„ฐ๋ฅผ ์ „๋‹ฌ ํ• ์ˆ˜ ์—†๋‹ค ๋™์ ์œผ๋กœ ํŽ˜์ด์ง€ ํ• ๋‹น์ด ๊ฐ€๋Šฅํ•˜๋‹ค ์ฆ‰ ๊ฐ€ ๊ฐ€๋Šฅํ•˜๋‹ค flush true : ๋ฌธ์„œ์˜ ์ถœ๋ ฅ ๊ฒฐ๊ณผ๋ฅผ ํ•ญ์ƒ ๋ฒ„ํผ๋‚ด์—์„œ ๊ฐฑ์‹  ํ•˜๋ผ๋Š” ..
Day04(errorํƒ€์ž…์ง€์ •)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
์—๋ŸฌํŽ˜์ด์ง€๋ฅผ ํ•˜๋‚˜๋งŒ ์ง€์ •ํ•ด์ค˜๋„ ๋˜์ง€๋งŒ ์—ฌ๋Ÿฌ mainํŽ˜์ด์ง€์—์„œ ๋‹ค์–‘ํ•œ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ• ๋•Œ๋งˆ๋‹ค ์—๋Ÿฌ ํƒ€์ž…์— ๋”ฐ๋ผ ์„œ๋กœ ๋‹ค๋ฅธ ํŠน์ • ์—๋ŸฌํŽ˜์ด์ง€๋ฅผ ๋ณด์—ฌ์ฃผ๊ณ ์‹ถ์„ ๋•Œ๋Š” ์–ด๋–ป๊ฒŒ ํ•ด์•ผํ•˜๋Š”๊ฐ€? 02errorMain.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ 02errorClassCast.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ํด๋ž˜์Šค์ผ€์ŠคํŠธ ์—๋ŸฌํŽ˜์ด์ง€ 02errorNullPointer.jsp์˜ ์ฝ”๋“œ๋‚ด์šฉ ๋„ํฌ์ธํ„ฐ ์—๋ŸฌํŽ˜์ด์ง€ 02errorMain.jsp์—์„œ request๊ฐ์ฒด๋ฅผ ์ด์šฉํ•ด์„œ error์˜ ํŒŒ๋ผ๋ฏธํ„ฐ ๊ฐ’์„ ๋ฐ›์•„์„œ ๋ณ€์ˆ˜์— ๋Œ€์ž…ํ•˜์—ฌ if๋ฌธ์„ ํ†ตํ•ด ์—๋Ÿฌ์˜ ์ข…๋ฅ˜์— ๋”ฐ๋ผ ์—๋Ÿฌ๋ฅผ ๋ฐœ์ƒ์‹œํ‚ค๋„๋ก ํ•˜์˜€๊ณ , WEB-INF ๋ฐ‘์˜ web.xml์— ํ•ด๋‹น ์ฝ”๋“œ๋ฅผ ์ถ”๊ฐ€ ํ•˜์˜€๋‹ค. java.lang.NullPointerException /06error/02errorNullPointer.jsp ๋ณด์—ฌ์ค„ j..
Day04(error)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
01errorMain.jsp ์ฝ”๋“œ๋‚ด์šฉ ๋””๋ ‰ํ‹ฐ๋ธŒ ๋ถ€๋ถ„์— errorPage="01errorPage.jsp" ๋ฅผ ์ถ”๊ฐ€ํ•œ๋‹ค. ์—ฌ๊ธฐ์„œ 01errorPage.jsp๋Š” 01errorMain.jsp์—์„œ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ–ˆ์„ ๋•Œ ๋ณด์—ฌ์ค„ ํŽ˜์ด์ง€์ด๋‹ค. ๊ธฐ๋ณธ์ ์œผ๋กœ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ•˜๋ฉด ๋ฒ„ํผ๋ฅผ ๋น„์šฐ๊ณ  ์—๋ŸฌํŽ˜์ด์ง€์— ๋Œ€ํ•œ ๋ฐ์ดํ„ฐ๋ฅผ ๋‹ค์‹œ ๋ฒ„ํผ์— ์ฑ„์›Œ์„œ ์ „์†กํ•œ๋‹ค. errorํŽ˜์ด์ง€๋ฅผ ์„ค์ •ํ•˜๊ฒŒ ๋˜๋ฉด ๊ธฐ๋ณธerrorํŽ˜์ด์ง€(ํŒŒ๋ž€ํ™”๋ฉด) ๋Œ€์‹  ์ผ๋ฐ˜ ์‚ฌ์šฉ์ž๋“ค์ด ๋ณผ๋งŒํ•œ ํŽ˜์ด์ง€๋ฅผ ๋Œ€์‹  ๋ณด์—ฌ์ฃผ๋Š” ๊ธฐ๋Šฅ์ด ์žˆ๋‹ค. RunTimeException : ์‹คํ–‰์ค‘์— ๋ฐœ์ƒํ•˜๋Š” ์˜ค๋ฅ˜์˜ ์ข…๋ฅ˜ ์‹คํ–‰ ์ค‘์— ๋ฐœ์ƒํ•˜๋ฉฐ ์‹œ์Šคํ…œ ํ™˜๊ฒฝ์ ์œผ๋กœ๋‚˜ ์ธํ’‹ ๊ฐ’์ด ์ž˜๋ชป๋œ ๊ฒฝ์šฐ, ํ˜น์€ ์˜๋„์ ์œผ๋กœ ๊ฐœ๋ฐœ์ž๊ฐ€ ์žก์•„๋‚ด๊ธฐ ์œ„ํ•œ ์กฐ๊ฑด ๋“ฑ์— ๋ถ€ํ•ฉํ•  ๋•Œ ๋ฐœ์ƒ(throw)๋˜๊ฒŒ ๋งŒ๋“ ๋‹ค. NullPointerException ..
Day03(ArrayList)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
ArrayListํ™œ์šฉํ•˜์—ฌ ์ˆซ์ž ์กฐํ•ฉํ•˜๊ธฐ? addAll : ํ•ฉ์ง‘ํ•ฉ ex) list2.addAll(list1); -> list2 = list1 + list2๊ฐ€ ๋œ๋‹ค. (์ค‘๋ณต๋˜๋Š” ๊ฐ’์ด ๊ฑธ๋Ÿฌ์ง€์ง€์•Š์Œ) removeAll : ์ฐจ์ง‘ํ•ฉ ex) list2.removeAll(list1); -> list2 = list2 - list1๊ฐ€ ๋œ๋‹ค. (์ค‘๋ณต๋˜๋Š” ๊ฐ’ ์ œ๊ฑฐ๋จ) retainAll : ๊ต์ง‘ํ•ฉ ex) list2.retainAll(list1); -> list2=list1๊ณผ list2์˜ ์ค‘๋ณต๊ฐ’์„ ์ €์žฅํ•œ๋‹ค. (์ค‘๋ณต๋˜๋Š” ๊ฐ’๋งŒ ์ €์žฅ) ์ถœ๋ ฅ๊ฒฐ๊ณผ
Day03(session)
ยท
๐Ÿ“† Today I Learned(๊ฐœ๋ฐœ์–ธ์–ดํ•™์Šต)/JSP
08sessionSet.jsp ์ฝ”๋“œ๋‚ด์šฉ session๊ฐ์ฒด ์‚ฌ์šฉ์ž๋ณ„๋กœ ํ•œ๊ฐœ์”ฉ ์ƒ์„ฑ๋˜๋Š” ๊ฐ์ฒด ์„œ๋ฒ„ : 1๊ฐœ request(์–ด๋–ค ๋ธŒ๋ผ์šฐ์ €์—์„œ ์™”๋Š”์ง€์— ๋Œ€ํ•œ ์ •๋ณด๊ฐ€ ์žˆ์Œ) request.getSession์€ ์„œ๋ฒ„๋กœ๋ถ€ํ„ฐ ์ฐฝํฌ ์ปดํ“จํ„ฐ์—์„œ ์˜จ๊ฑฐ๋‹ˆ๊นŒ ๊ฑฐ๊ธฐ์— ํ•ด๋‹นํ•˜๋Š” session ์ฃผ์„ธ์š”. session์˜ ํ‚ค๊ฐ’์€ ๋Œ€๋ฌธ์ž๋กœ ์“ด๋‹ค. ์˜๋ฏธ๋ณ„ ๊ตฌ๋ถ„์€ '_' 08sessionGet.jsp ์ฝ”๋“œ๋‚ด์šฉ sessionGet USER_INFO : PRE_PAGE : session์— ํ•œ๋ฒˆ setํ•˜๊ณ ๋‚˜์„œ getํ–ˆ์„ ๋•Œ ๋ฐ์ดํ„ฐ๊ฐ€ ์žˆ๋ƒ ์—†๋ƒ๋กœ ๋กœ๊ทธ์ธํ™”๋ฉด์œผ๋กœ ๊ฐˆ์ง€, ์ •์ƒ์ ์ธ ํ™”๋ฉด์„ ๋ณด์—ฌ์ค„์ง€ ๊ฒฐ์ •๋œ๋‹ค.