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[Java] Unsupported major.minor version 52.0 Error ํ”„๋กœ์ ํŠธ ์„ธํŒ… ๋„์ค‘ java.lang.UnsupportedClassVersionError: org/springframework/util/StopWatch : Unsupported major.minor version 52.0 (unable to load class org.springframework.util.StopWatch) ๋ผ๋Š” ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ•˜์˜€์Šต๋‹ˆ๋‹ค. version 52.0์€ jar ํŒŒ์ผ์˜ ๋นŒ๋“œ jdk ๋ฒ„์ „์„ ๋‚˜ํƒ€๋ƒ…๋‹ˆ๋‹ค. ์ˆซ์ž ๋ณ„ ์ž๋ฐ” ๋ฒ„์ „ Java SE 13 = 57 (0x39hex) Java SE 12 = 56 (0x38 hex) Java SE 11 = 55 (0x37 hex) Java SE 10 = 54 (0x36 hex) Java SE 9 = 53 (0x35 hex) Java SE 8 = 52 .. 2022. 6. 10.
[๋ณด์•ˆ] DMZ ๋„คํŠธ์›Œํฌ DMZ(Demilitarized zone, ๋น„๋ฌด์žฅ์ง€๋Œ€) ์กฐ์ง์˜ ๋‚ด๋ถ€ ๋„คํฌ์›Œํฌ(์ธํ„ฐ๋„ท)์™€ ์™ธ๋ถ€ ๋„คํŠธ์›Œํฌ ์‚ฌ์ด์— ์œ„์น˜ํ•œ ์„œ๋ธŒ๋„ท DMZ ์•ˆ์— ์žˆ๋Š” ํ˜ธ์ŠคํŠธ๋“ค์€ ๋‚ด๋ถ€ ๋„คํŠธ์›Œํฌ๋กœ ์—ฐ๊ฒฐํ•  ์ˆ˜ ์—†์–ด, DMZ ์•ˆ์˜ ํ˜ธ์ŠคํŠธ์˜ ์นจ์ž…์œผ๋กœ๋ถ€ํ„ฐ ๋‚ด๋ถ€ ๋„คํŠธ์›Œํฌ๋ฅผ ๋ณดํ˜ธ ๋ณด์•ˆ์˜ ๋ชฉ์ ์œผ๋กœ ํ์‡„ ํ˜•ํƒœ์˜ ๋‚ด๋ถ€ ๋„คํŠธ์›Œํฌ๋งŒ ์‚ฌ์šฉํ•˜๋Š” ๊ธฐ๊ด€๋“ค์—๊ฒŒ ํ•„์š” ์™ธ๋ถ€์—์„œ ์ ‘๊ทผ๋˜์–ด์•ผ ํ•  ํ•„์š”๊ฐ€ ์žˆ๋Š” ์„œ๋ฒ„๋“ค์„ ์œ„ํ•ด ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค. ex. ๋ฉ”์ผ์„œ๋ฒ„, ์›น์„œ๋ฒ„, DNS ์„œ๋ฒ„ ์‚ผ๊ฐ ๋ฐฉํ™”๋ฒฝ ์„ค์ •(three-legged firewall set-up) ๋ฐฉํ™”๋ฒฝ ์„ค์ • ์˜ต์…˜์„ ํ†ตํ•ด DMZ ํ˜•์„ฑ ์ด ์˜ต์…˜์„ ํ†ตํ•ด ๊ฐ๊ฐ์˜ ๋„คํŠธ์›Œํฌ๋Š” ๋ฐฉํ™”๋ฒฝ์— ์„œ๋กœ ๋‹ค๋ฅธ ํฌํŠธ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์—ฐ๊ฒฐ ์ฐจ๋‹จ๋œ ์„œ๋ธŒ๋„ท ๋ฐฉํ™”๋ฒฝ(screened-subnet firwall) ๋‘๊ฐœ์˜ ๋ฐฉํ™”๋ฒฝ ์ค‘๊ฐ„์— DMZ๋ฅผ ์—ฐ๊ฒฐํ•˜๋Š” ๋” ๊ฐ•๋ ฅํ•œ.. 2022. 1. 20.
[WAS] http → https ๋กœ ๋ณ€ํ™˜ํ•˜๊ธฐ http → https ๋กœ ๋ณ€ํ™˜ํ•˜๋Š” ๊ณผ์ •์„ ์•Œ์•„๋ด…์‹œ๋‹ค. 1. KeyStore ํŒŒ์ผ private key, certificate ๋“ฑ์„ ์ €์žฅํ•˜๋Š” ํŒŒ์ผ C:/Users/์‚ฌ์šฉ์ž๋ช… ๊ฒฝ๋กœ์— ํŒŒ์ผ ์œ„์น˜ 2. Tomcat ์„œ๋ฒ„์˜ server.xml ์„ค์ • ์ฃผ์„์ฒ˜๋ฆฌ (26๋ฒˆ์งธ ์ค„) ํƒœ๊ทธ ์‚ฌ์ด์— Connector ํƒœ๊ทธ ์ถ”๊ฐ€ โ€‹ keystoreFile: keystore ํŒŒ์ผ ์œ„์น˜ keystorePass: keystore ํŒŒ์ผ ๋น„๋ฐ€๋ฒˆํ˜ธ port: ํฌํŠธ๋ฒˆํ˜ธ (443์ด ๊ธฐ๋ณธ) 2022. 1. 3.
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