location에 desktop을 설정하라하셔서 하려고 하는데 desktop이 안 뜨는데 이 같은 경우는 어떻게 해야 하나요?? intelli j 재설치도 해봤는데도 안 뜨네요

--- - name: Download Tomcat9 from tomcat.apache.org hosts: all #become: yes # become_user: root tasks: - name: Create a Directory /opt/tomcat-9 file: path: /opt/tomcat-9 state: directory mode: 0755 - name: Download the Tomcat checksum get_url: url: https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.74/bin/apache-tomcat-9.0.74.tar.gz.sha512 dest: /opt/tomcat-9/apache-tomcat-9.0.74.tar.gz.sha512 - name: Register the checksum value shell: cat /opt/tomcat-9/apache-tomcat-9.0.74.tar.gz.sha512 | grep apache-tomcat-9.0.74.tar.gz | awk '{ print $1 }' register: tomcat_checksum_value - name: Download Tomcat using get_url get_url: url: https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.74/bin/apache-tomcat-9.0.74.tar.gz dest: /opt/tomcat-9 mode: 0755 checksum: sha512:{{ tomcat_checksum_value.stdout }}"

책에서 프로젝트를 진행하다보면 보통try { }catch(error) {console.error(error);next(error)}로 next(error)를 해주시는데 error가 발생했을때 console.error(error)를 찍고 next(error)에서 에러처리(ex)프로젝트에서 app.use((err, req, res, next) => { res.locals.message = err.message; res.locals.error = process.env.NODE_ENV !== 'production' ? err : {}; res.status(err.status || 500); res.render('error'); });여기로로 보내지는게 맞나요?

import java.util.Scanner; //임시반장 정하기 public class Class11 { public static void main(String[] args) { Class11 T = new Class11(); Scanner kb = new Scanner(System.in); int n = kb.nextInt(); // n명의 학생 int[][] arr = new int[n][5]; // n명 학생의 5학년까지 for (int i = 0; i < n; i++) for (int j = 0; j < 5; j++) arr[i][j] = kb.nextInt(); System.out.println(T.solution(n, arr)); } public int solution(int n, int[][] arr) { int answer = 0; int max = 0; for (int i = 0; i < n; i++) { // i학생 인덱스 int[] x = new int[n]; // 같은 반을 했던적이 있는지 담는 배열 for (int j = 0; j < 5; j++) { // 학년 수 for (int k = 0; k < n; k++) { //k학생 인덱스 if (i != k && arr[i][j] == arr[k][j])//i번학생과 k번학생의 학년이 같은지 검사. x[k] = 1; } } int s = 0; for (int tmp : x) { s += tmp; } System.out.print(i + 1 + "학생: " + s + " /"); for(int a : x) System.out.print( a + " "); System.out.println(); if (s > max) { max = s; answer = i + 1; } } return answer; } }저는 i번째 학생을 고정해두고 k번 학생이 반복문을 돌면서 j학년을 돌면서같은 반이었으면 x배열의 인덱스에 표시하도록 했습니다.그러면 x배열에 각 학생들이 같은 반이었던 학생들이 표시가 되고, 그 수를 합해서 answer로 반환하도록 했는데요.. 정답이 안 나옵니다 ㅠ.. 왜일까요

상황: hibernate.jdbc.batch_size 옵션을 사용하지 않고, em.persist()를 4번 하였다.쓰기 지연 SQL 저장소에 insert 쿼리가 4개 존재하고, commit 시점에 DB에 insert 쿼리 4개가 전달된다는 것은 알겠습니다. 그런데, insert 쿼리가 DB에 전달될 때, 4번의 네트워크가 반복되는 것인가요? (https://www.inflearn.com/questions/41344/batch-size%EC%97%90-%EB%8C%80%ED%95%B4%EC%84%9C-%EC%A7%88%EB%AC%B8%EC%9D%B4-%EC%9E%88%EC%8A%B5%EB%8B%88%EB%8B%A4 이 질문을 보고 질문드립니다)그리고 4번의 네트워크가 반복된다는 것이 'DB와 커넥션 맺고 insert 쿼리 1개 전달하고 커넥션을 종료'하는 과정이 4번 반복된다는 뜻인가요? 그렇다면 em.persist()할 때마다 insert 쿼리를 보내는 것과 무슨 차이가 있는 것이죠...? 

안녕하세요 큰돌 선생님!!5-L 문제 접근할 때 비트마스킹을 못 떠올려서, 전체 인원 중에 절반 인원을 뽑는 조합으로 생각했습니다.최대치로 가정하고 계산한다면, 20C10이 되는데요. 선생님은 비트마스킹을 써야 한다는 것을 조합과 어떻게 구분하셨는지 코멘트 주시면 감사하겠습니다..!앞에 aass0930님 질문글을 읽어보아도 제가 생각했던 로직에 대한 답을 찾을 수 없어서 이렇게 추가적으로 질문 드렸습니다!추가 질문) 경우의 수로 접근한다면, 스타트 팀에 인원을 먼저 배정한다고 했을 때 20 * 19 의 경우의 수가 나오는건가요? 항상 감사합니다 :)

안녕하세요 선생님,제가 load_boston을 import했을 때, 다음과 같이 오류가 나왔었습니다.ImportError: `load_boston` has been removed from scikit-learn since version 1.2.따라서 scikit-learn을 0.24.2버젼으로 바꿨는데, 여전히 이 오류가 계속 나옵니다.도저히 방법을 모르겠습니다.도와주세요.감사합니다.

view, local, screen 선택하는 부분 표시가 안되고,메쉬 클릭으로 edge나 polygon 선택은 되는데드래그 했을 때는 선택이 안되네요껐다 켜봐도 그대로 입니다 어떻게 해야하나요 ㅠㅠ  

수업자료 한번 다운 받았었는데 컴퓨터 포맷해서 다 날라갔습니다.ㅜㅜ다시 다운 받을 수 없나요??

여러개의 argument resolver 등록 했을때 등록한 여러개의 argument resolver의 supportsParameter은 모두 return true일경우 먼저 등록(add)한 resolver의 resolveArgument부터 차례대로 실행되는건가요??

클린 아키텍처 10장 ISP 원칙 파트를 읽다가 이해가 가지 않는 부분이 생겨 질문드립니다. 정적 언어는 include 선언문 때문에 소스코드 의존성 발생 -> 재배포, 재컴파일 필요동적 언어는 선언문이 없음. 런타임에 추론함. 따라서 소스코드 의존성 없음 -> 재배포, 재컴파일 필요 없음이 부분이 헷갈립니다.  파이썬도 import를 쓰지 않나요? 그건 정적 언어의 include 선언문과 다른 건가요? 동적 언어는 변수 타입 말고도 외부 모듈도 동적으로 불러오나요?

사진첨부 부분에 이미지를 넣었는데 오류가 뜨는데 이유가 뭘까요?

sudo service nginx start 할때 마다 Job for nginx.service failed because the control process exited with error code.See "systemctl status nginx.service" and "journalctl -xeu nginx.service" for details.이에러가 뜹니다https://www.zerocho.com/category/NodeJS/post/5ef450a5701d8a001f84baeb 이블로그 보면서 했습니다 ㅠㅠ

db.pool.query(`CREATE TABLE list ( id INTEGER AUTO_INCREMENT, value TEXT, PRIMARY KEY (id))`, (err, results, fields) => { console.log('err: ', err); console.log('results: ', results); });server.js 의 위 부분 실행시, 아래와 같은 오류가 출력되는데 어떤 부분을 수정해야될까요?참고로 테이블명은 강의와 다르게 list로 했고, err 확인을 위해 console.log('err: ', err); 추가했습니다.

setAuth 메소드 구현 과정(6분 34초) 중 try/catch문에서resetUserInfo 메소드를 호출할 때왜 resetUserInfo()가 아닌 auth.reserUserInfo()인지 궁금합니다.

[40초 - src/stores/index.js]service 폴더에 있는 api.js 파일을 임포트 시키는 것이므로상대주소를 다음과 같이 작성해야 합니다."../service/api.js"

fetchResult() 가 5.0 부터 권장하지 않는다 해서 fetch().size()를 사용한다고 하는데 List<MemberTeamDto> content = queryFactory .select(new QMemberTeamDto( member.id.as("memberId"), member.username, member.age, team.id.as("teamId"), team.name.as("teamName") )) .from(member) .leftJoin(member.team, team) .where( usernameEq(condition.getUsername()), teamNameEq(condition.getTeamName()), ageGoe(condition.getAgeGoe()), ageLoe(condition.getAgeLoe()) ) .offset(pageable.getOffset()) .limit(pageable.getPageSize()) .fetch(); int total = queryFactory .selectFrom(member) .leftJoin(member.team, team) .where( usernameEq(condition.getUsername()), teamNameEq(condition.getTeamName()), ageGoe(condition.getAgeGoe()), ageLoe(condition.getAgeLoe()) ).fetch().size(); int size = content.size(); return new PageImpl<>(content, pageable, total);아래처럼 count 쿼리를 날려서 구한 total 값과위에 content 쿼리문의 size()값이 다르게 나오던데이 size 값은 단지 PageRequet.of로 넣어준 size 값인가요?? 두 방식 중 total로 구하는 방식이 맞는건가요?

int x;x = 123;이 상황에서 &x를 출력하면 16진수로 이루어진 x의 주소를 알 수 있습니다.12:35 부근에서,선생님께서 프로그래머가 123 숫자에 대한 주소를 갖고 오기가 어렵다고 하셨는데,이것에 대한 질문을 해보았더니, 답변해주신 분께서"literal을 할당한 변수의 주소 (&x)는 알아낼 수 있어도literal 123의 주소를 직접적으로 알아낼 수 없습니다."라고 합니다....그런데 literal을 할당한 변수의 주소와 literal 123의 주소의 차이점을 모르겠습니다...ㅠㅠㅠㅠ

안녕하세요 강사님 강의 듣던 도중에 아래와 같은 에러가 발생해서요 서버를 돌렸을때는 에러없이 정상적으로 돌아갑니다. 구글링해서 이것저것 해보았는데 원인을 못찾아서 이렇게 질문 올립니다!

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]여기에 질문 내용을 남겨주세요. 반복문부터 html에 문제가있는지 오류가나오네요org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "user.username" (template: "basic/condition" - line 17, col 13) at org.thymeleaf.spring5.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:292) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:166) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.processor.AbstractStandardExpressionAttributeTagProcessor.doProcess(AbstractStandardExpressionAttributeTagProcessor.java:144) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.ProcessorTemplateHandler.handleOpenElement(ProcessorTemplateHandler.java:1314) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.OpenElementTag.beHandled(OpenElementTag.java:205) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.Model.process(Model.java:282) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.Model.process(Model.java:290) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.IteratedGatheringModelProcessable.processIterationModel(IteratedGatheringModelProcessable.java:367) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.IteratedGatheringModelProcessable.process(IteratedGatheringModelProcessable.java:221) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.ProcessorTemplateHandler.handleCloseElement(ProcessorTemplateHandler.java:1640) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.CloseElementTag.beHandled(CloseElementTag.java:139) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.TemplateModel.process(TemplateModel.java:136) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:592) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:366) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:190) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1406) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1150) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.27.jar:5.3.27] at javax.servlet.http.HttpServlet.service(HttpServlet.java:529) ~[tomcat-embed-core-9.0.74.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.27.jar:5.3.27] at javax.servlet.http.HttpServlet.service(HttpServlet.java:623) ~[tomcat-embed-core-9.0.74.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.27.jar:5.3.27] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.27.jar:5.3.27] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.27.jar:5.3.27] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.27.jar:5.3.27] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.27.jar:5.3.27] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.27.jar:5.3.27] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:389) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:926) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'username' cannot be found on object of type 'hello.thymeleaf.basic.BasicController$User' - maybe not public or not valid? at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:223) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:106) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:53) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:412) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:93) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:114) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:338) ~[spring-expression-5.3.27.jar:5.3.27] at org.thymeleaf.spring5.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:265) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] ... 64 common frames omitted2023-05-02 23:47:29.787 ERROR 13660 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "user.username" (template: "basic/condition" - line 17, col 13)] with root causeorg.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'username' cannot be found on object of type 'hello.thymeleaf.basic.BasicController$User' - maybe not public or not valid? at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:223) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:106) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:53) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:412) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:93) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:114) ~[spring-expression-5.3.27.jar:5.3.27] at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:338) ~[spring-expression-5.3.27.jar:5.3.27] at org.thymeleaf.spring5.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:265) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:166) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.standard.processor.AbstractStandardExpressionAttributeTagProcessor.doProcess(AbstractStandardExpressionAttributeTagProcessor.java:144) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.ProcessorTemplateHandler.handleOpenElement(ProcessorTemplateHandler.java:1314) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.OpenElementTag.beHandled(OpenElementTag.java:205) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.Model.process(Model.java:282) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.Model.process(Model.java:290) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.IteratedGatheringModelProcessable.processIterationModel(IteratedGatheringModelProcessable.java:367) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.IteratedGatheringModelProcessable.process(IteratedGatheringModelProcessable.java:221) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.ProcessorTemplateHandler.handleCloseElement(ProcessorTemplateHandler.java:1640) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.CloseElementTag.beHandled(CloseElementTag.java:139) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.TemplateModel.process(TemplateModel.java:136) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:592) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:366) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:190) ~[thymeleaf-spring5-3.0.15.RELEASE.jar:3.0.15.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1406) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1150) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.27.jar:5.3.27] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.27.jar:5.3.27] at javax.servlet.http.HttpServlet.service(HttpServlet.java:529) ~[tomcat-embed-core-9.0.74.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.27.jar:5.3.27] at javax.servlet.http.HttpServlet.service(HttpServlet.java:623) ~[tomcat-embed-core-9.0.74.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.27.jar:5.3.27] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.27.jar:5.3.27] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.27.jar:5.3.27] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.27.jar:5.3.27] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.27.jar:5.3.27] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.27.jar:5.3.27] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:389) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:926) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.74.jar:9.0.74] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] users 에 문제가있는거같은데 아무리봐도 뭐가 문제인지 모르겠어요 똑같이 복붙해도 그대로이고