iruplace

에러 발생 시, org.springframework.orm.jpa.JpaSystemException: ids for this class must be manually assigned before calling save(): … org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): … Caused by: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): … JPA @Id가 pk=auto increme..

springboot @Scheduler 이용 시, 서버가 여러개 돌아가면 각 서버마다 @Scheduler가 돌아가 중복 처리 됨. Shedlock을 사용하면 스케쥴러가 한 번만 실행 됨. pom.xml 의존성 추가 net.javacrumbs.shedlock shedlock-spring 2.2.0 net.javacrumbs.shedlock shedlock-provider-jdbc-template 2.1.0 config 추가 import net.javacrumbs.shedlock.core.LockProvider; import net.javacrumbs.shedlock.provider.jdbctemplate.JdbcTemplateLockProvider; import net.javacrumbs.shedlock..

application.yml data: type: MASTER DataPropertis class 설정 import lombok.Data; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.Configuration; import org.springframework.validation.annotation.Validated; @Configuration @ConfigurationProperties(prefix = "data") /// applicaton yml의 root 엘리먼트 참고 @Validated @Data public class Dat..

import org.springframework.beans.propertyeditors.CustomCollectionEditor; import org.springframework.web.bind.WebDataBinder; import org.springframework.web.bind.annotation.InitBinder; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.InitBinder; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bin..

Http Method : Get 으로 설정 후 Request Data를 @RequestBody로 설정하여 Json으로 처리 할 때, @Operation(summary = "목록 조회") @GetMapping (value="/list") public Object list ( @Valid @RequestBody ReqVo req) { ...... Swagger 화면 요청 시, 서버 에러 java.lang.StringIndexOutOfBoundsException: begin -1, end -1, length 329 at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3319) at java.base/java.lang.String.substring(St..

Java 응답 VO에 특정 필드 제외 처리 import com.fasterxml.jackson.annotation.JsonIgnore; import io.swagger.v3.oas.annotations.media.Schema; import lombok.Getter; import lombok.Setter; @Getter @Setter public class ResVo { @Schema(description = "수") String cnt; // 응답 데이터 제외 @JsonIgnore @Schema(description = "회원 아이디") String mberId; }

Springframework 의 RestTemplate 이용 하여, http 통신 구성 시 , public static ResponseEntity send(String url, HttpMethod method, HttpHeaders header, Map params, Class responseType) { HttpComponentsClientHttpRequestFactory httpFactory = new HttpComponentsClientHttpRequestFactory(); httpFactory.setConnectTimeout(5*1000); httpFactory.setReadTimeout(5*1000); RestTemplate restTemplate = new RestTemplate(httpFac..

Springboot request param VO class로 받을 시, 필수 값 null일 경우 exception handler 처리 RestController @RequestMapping("/test") @RestController public class TestController { @GetMapping(value = "/t1") public Map t1( @Validated ReqVo req) { Request Param VO import lombok.Data; import javax.validation.constraints.NotNull; @Data public class ReqVo{ /** * 필수코드 @NotNull 선언 */ @NotNull String code_type; Exception..

springboot restcontroller requestparam 설정 @GetMapping(value = "/test") public Map accounts( @RequestParam(value = "code") String code, @RequestParam(value = "page" , required = false, defaultValue = "0") int page, @RequestParam Map req) throws Exception { @RequestParam 필수값 exception handler 잘못된 예 @ControllerAdvice @RestController public class ResponseExceptionHandler extends ResponseEntityExcept..

List, List의 배열 생성 fun main() { println(mutableListOf(1,2,3)) println(mutableListOf("가", "나", "다")) } 배열의 가장 큰 숫자 조회 object Util { fun getBigger(list: List): Int { var result = 0 for(count in list) { if(count != null && result < count) { result = count } } return result } } fun main() { println(Util.getBigger(mutableListOf(1, 2, 3))) // 3 }