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๐Ÿ‘ฉ‍๐Ÿ’ป Learn programming/Spring

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[Trouble Shooting] add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling โœ”๏ธ ์„œ์‚ฌ Spring ์›๊ฒฉ ๊ฐ•์˜ ์ค‘์— ์Šคํ”„๋ง์˜ 3๊ณ„์ธต(Controller, Sevice, Repository) ์—†์ด AllInOneServelet ํด๋ž˜์Šค๋ฅผ ์ƒ์„ฑํ•˜์—ฌ ๊ตฌํ˜„ํ•˜๊ณ , API์˜ ๋™์ž‘์„ ๊ฒ€์ฆํ•˜๊ธฐ ์œ„ํ•œ ์ž‘์—… ์ค‘ ํŠธ๋Ÿฌ๋ธ”์„ ๋งŒ๋‚จ! ARC์—์„œ POST API๋ฅผ ๋ณด๋ƒˆ์„ ๋•Œ, "Internal Server Error" ์—๋Ÿฌ ํ™•์ธ์„ ์œ„ํ•ด์„œ intellij ์—๋Ÿฌ ์ฝ”๋“œ ํ™•์ธ Servlet.service() for servlet [com.sparta.springcore.AllInOneServlet] in context with path [] threw exception ์—๋Ÿฌ ์ฝ”๋“œ ์˜†์— ์žˆ๋Š” ์š” ๋ฌธ์žฅ๋งŒ ์‹ ๊ฒฝ ์“ฐ๋Š๋ผ ๊ฒฝ๋กœ๊ฐ€ ์ž˜๋ชป๋œ ์ค„ ์•Œ๊ณ  PC ์–ธ์–ด ์„ค์ • ๋ณ€๊ฒฝํ•ด๋ณด๊ณ  ๋‚œ๋ฆฌ ... ๊ฒฐ๊ตญ, ํŒ€์›๋ถ„๊ป˜ ๋„์›€์„ ์ฒญํ–ˆ๋Š”๋ฐ ..! ..
[Spring] Client, Server, DB์˜ ํ๋ฆ„ ์ตํžˆ๊ธฐ ์œ„ํ•œ ๊ฐœ๋… ์ •๋ฆฌ โ— Spring์˜ ๊ตฌ์กฐ 1. Controller : ๊ฐ€์žฅ ๋ฐ”๊นฅ ๋ถ€๋ถ„, ์š”์ฒญ/์‘๋‹ต์„ ์ฒ˜๋ฆฌํ•จ. 2. Service : ์ค‘๊ฐ„ ๋ถ€๋ถ„, ์‹ค์ œ ์ค‘์š”ํ•œ ์ž‘๋™์ด ๋งŽ์ด ์ผ์–ด๋‚˜๋Š” ๋ถ€๋ถ„ 3. Repo : ๊ฐ€์žฅ ์•ˆ์ชฝ ๋ถ€๋ถ„, DB์™€ ๋งž๋‹ฟ์•„ ์žˆ์Œ. (Repository, Entity) โœ”๏ธ RDBMS - RDBMS(Relational DataBase Management System), ์ค„์—ฌ์„œ RDB - ์ปดํ“จํ„ฐ์— ์ •๋ณด๋ฅผ ์ €์žฅํ•˜๊ณ  ๊ด€๋ฆฌํ•˜๋Š” ๊ธฐ์ˆ  - ๊ด€๊ณ„ํ˜• ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค - RDBMS์˜ ์ข…๋ฅ˜ : MySQL, PostgreSQL, Oracle Database(์œ ๋ฃŒ) โœ”๏ธ H2 - RDBMS์˜ ํ•œ ์ข…๋ฅ˜ - In-memory DB๋กœ, ์„œ๋ฒ„๊ฐ€ ์ž‘๋™ํ•˜๋Š” ๋™์•ˆ์—๋งŒ ๋‚ด์šฉ์„ ์ €์žฅํ•˜๊ณ , ์„œ๋ฒ„๊ฐ€ ์ž‘๋™์„ ๋ฉˆ์ถ”๋ฉด ๋ฐ์ดํ„ฐ๊ฐ€ ๋ชจ๋‘ ์‚ญ์ œ๋จ. = ์„œ๋ฒ„๊ฐ€ ์ผœ์ ธ์žˆ๋Š” ..

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