excel download 구현

WebContent/jsp/onl/kjb/statistics/apiStatsHourMan.jsp

@@ -407,6 +407,124 @@
 			fetchChartData();
 		}
 
+		function exportToExcel() {
+			console.log('[Excel Export] Starting...');
+
+			var postData = {
+				cmd: 'EXCEL_EXPORT',
+				searchApiName: $("input[name=searchApiName]").val(),
+				searchGwInstanceId: $("input[name=searchGwInstanceId]").val(),
+				searchBizDivCode: $("input[name=searchBizDivCode]").val(),
+				searchClientId: $("input[name=searchClientId]").val(),
+				searchInboundAdapter: $("input[name=searchInboundAdapter]").val(),
+				searchOutboundAdapter: $("input[name=searchOutboundAdapter]").val(),
+				serviceType: '${param.serviceType}'
+			};
+
+			var searchDate = $("input[name=searchDate]").val().replace(/-/g, "");
+			if (searchDate) {
+				postData.searchStartDateTime = searchDate + "00";
+				postData.searchEndDateTime = searchDate + "23";
+			}
+
+			console.log('[Excel Export] Request data:', postData);
+
+			var xhr = new XMLHttpRequest();
+			xhr.open('POST', url, true);
+			xhr.responseType = 'blob';
+			xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
+
+			xhr.onload = function() {
+				console.log('[Excel Export] Response received - Status:', xhr.status);
+
+				if (xhr.status === 200) {
+					var blob = xhr.response;
+					var contentType = xhr.getResponseHeader('Content-Type');
+					console.log('[Excel Export] Blob size:', blob.size, 'Content-Type:', contentType);
+
+					// JSON 에러 응답인지 확인
+					if (contentType && contentType.indexOf('application/json') !== -1) {
+						var reader = new FileReader();
+						reader.onload = function() {
+							try {
+								var errorObj = JSON.parse(reader.result);
+								alert(errorObj.message || 'Excel 파일 생성에 실패했습니다.');
+							} catch (e) {
+								alert('Excel 파일 생성에 실패했습니다.');
+							}
+						};
+						reader.readAsText(blob);
+						return;
+					}
+
+					// Blob 크기가 0이면 에러
+					if (blob.size === 0) {
+						alert('Excel 파일 생성에 실패했습니다. (빈 응답)');
+						return;
+					}
+
+					// 파일명 추출
+					var filename = 'api_stats.xlsx';
+					var disposition = xhr.getResponseHeader('Content-Disposition');
+					console.log('[Excel Export] Content-Disposition:', disposition);
+
+					if (disposition && disposition.indexOf('filename=') !== -1) {
+						var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
+						var matches = filenameRegex.exec(disposition);
+						if (matches != null && matches[1]) {
+							filename = matches[1].replace(/['"]/g, '');
+							filename = decodeURIComponent(filename);
+						}
+					}
+
+					console.log('[Excel Export] Downloading as:', filename);
+
+					// 파일 다운로드
+					var link = document.createElement('a');
+					link.href = window.URL.createObjectURL(blob);
+					link.download = filename;
+					document.body.appendChild(link);
+					link.click();
+					document.body.removeChild(link);
+					window.URL.revokeObjectURL(link.href);
+
+					console.log('[Excel Export] Download triggered');
+
+				} else if (xhr.status === 204) {
+					alert('조회된 데이터가 없습니다.');
+				} else {
+					// 에러 응답 처리
+					var reader = new FileReader();
+					reader.onload = function() {
+						var message = 'Excel 다운로드 중 오류가 발생했습니다.';
+						try {
+							var errorObj = JSON.parse(reader.result);
+							if (errorObj.message) message = errorObj.message;
+						} catch (e) {
+							console.error('[Excel Export] Error parsing error response:', e);
+						}
+						alert(message);
+					};
+					reader.readAsText(xhr.response);
+				}
+			};
+
+			xhr.onerror = function() {
+				console.error('[Excel Export] Network error');
+				alert('네트워크 오류가 발생했습니다.');
+			};
+
+			// Form data 생성
+			var formData = [];
+			for (var key in postData) {
+				if (postData.hasOwnProperty(key) && postData[key] != null && postData[key] !== '') {
+					formData.push(encodeURIComponent(key) + '=' + encodeURIComponent(postData[key]));
+				}
+			}
+
+			xhr.send(formData.join('&'));
+		}
+
 		function list() {
 			var gridPostData = getSearchForJqgrid("cmd", "LIST");
 			$('#grid').jqGrid({
@@ -480,6 +598,10 @@
 				search();
 			});
 
+			$("#btn_excel_export").click(function() {
+				exportToExcel();
+			});
+
 			$("input[name^=search]").keydown(function(key) {
 				if (key.keyCode == 13) {
 					$("#btn_search").click();
@@ -510,6 +632,9 @@
 			<button type="button" class="cssbtn" id="btn_search" level="R">
 				<i class="material-icons">search</i> <%= localeMessage.getString("button.search") %>
 			</button>
+			<button type="button" class="cssbtn" id="btn_excel_export" level="R">
+				<i class="material-icons">file_download</i> Excel 다운로드
+			</button>
 		</div>
 		<div class="title" id="title">API 시간별 통계</div>
 		<table class="search_condition" cellspacing="0">

WebContent/jsp/onl/kjb/statistics/apiStatsMinuteMan.jsp

@@ -415,6 +415,127 @@
 			fetchChartData(range);
 		}
 
+		function exportToExcel() {
+			console.log('[Excel Export] Starting...');
+
+			var postData = {
+				cmd: 'EXCEL_EXPORT',
+				searchApiName: $("input[name=searchApiName]").val(),
+				searchGwInstanceId: $("input[name=searchGwInstanceId]").val(),
+				searchBizDivCode: $("input[name=searchBizDivCode]").val(),
+				searchClientId: $("input[name=searchClientId]").val(),
+				searchInboundAdapter: $("input[name=searchInboundAdapter]").val(),
+				searchOutboundAdapter: $("input[name=searchOutboundAdapter]").val(),
+				serviceType: '${param.serviceType}'
+			};
+
+			var startDate = $("input[name=searchStartDate]").val().replace(/-/g, "");
+			var startTime = $("input[name=searchStartTime]").val().replace(/:/g, "");
+			var endDate = $("input[name=searchEndDate]").val().replace(/-/g, "");
+			var endTime = $("input[name=searchEndTime]").val().replace(/:/g, "");
+			if (startDate && startTime) {
+				postData.searchStartDateTime = startDate + startTime;
+				postData.searchEndDateTime = endDate + endTime;
+			}
+
+			console.log('[Excel Export] Request data:', postData);
+
+			var xhr = new XMLHttpRequest();
+			xhr.open('POST', url, true);
+			xhr.responseType = 'blob';
+			xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
+
+			xhr.onload = function() {
+				console.log('[Excel Export] Response received - Status:', xhr.status);
+
+				if (xhr.status === 200) {
+					var blob = xhr.response;
+					var contentType = xhr.getResponseHeader('Content-Type');
+					console.log('[Excel Export] Blob size:', blob.size, 'Content-Type:', contentType);
+
+					// JSON 에러 응답인지 확인
+					if (contentType && contentType.indexOf('application/json') !== -1) {
+						var reader = new FileReader();
+						reader.onload = function() {
+							try {
+								var errorObj = JSON.parse(reader.result);
+								alert(errorObj.message || 'Excel 파일 생성에 실패했습니다.');
+							} catch (e) {
+								alert('Excel 파일 생성에 실패했습니다.');
+							}
+						};
+						reader.readAsText(blob);
+						return;
+					}
+
+					// Blob 크기가 0이면 에러
+					if (blob.size === 0) {
+						alert('Excel 파일 생성에 실패했습니다. (빈 응답)');
+						return;
+					}
+
+					// 파일명 추출
+					var filename = 'api_stats.xlsx';
+					var disposition = xhr.getResponseHeader('Content-Disposition');
+					console.log('[Excel Export] Content-Disposition:', disposition);
+
+					if (disposition && disposition.indexOf('filename=') !== -1) {
+						var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
+						var matches = filenameRegex.exec(disposition);
+						if (matches != null && matches[1]) {
+							filename = matches[1].replace(/['"]/g, '');
+							filename = decodeURIComponent(filename);
+						}
+					}
+
+					console.log('[Excel Export] Downloading as:', filename);
+
+					// 파일 다운로드
+					var link = document.createElement('a');
+					link.href = window.URL.createObjectURL(blob);
+					link.download = filename;
+					document.body.appendChild(link);
+					link.click();
+					document.body.removeChild(link);
+					window.URL.revokeObjectURL(link.href);
+
+					console.log('[Excel Export] Download triggered');
+
+				} else if (xhr.status === 204) {
+					alert('조회된 데이터가 없습니다.');
+				} else {
+					// 에러 응답 처리
+					var reader = new FileReader();
+					reader.onload = function() {
+						var message = 'Excel 다운로드 중 오류가 발생했습니다.';
+						try {
+							var errorObj = JSON.parse(reader.result);
+							if (errorObj.message) message = errorObj.message;
+						} catch (e) {
+							console.error('[Excel Export] Error parsing error response:', e);
+						}
+						alert(message);
+					};
+					reader.readAsText(xhr.response);
+				}
+			};
+
+			xhr.onerror = function() {
+				console.error('[Excel Export] Network error');
+				alert('네트워크 오류가 발생했습니다.');
+			};
+
+			// Form data 생성
+			var formData = [];
+			for (var key in postData) {
+				if (postData.hasOwnProperty(key) && postData[key] != null && postData[key] !== '') {
+					formData.push(encodeURIComponent(key) + '=' + encodeURIComponent(postData[key]));
+				}
+			}
+
+			xhr.send(formData.join('&'));
+		}
+
 		function list() {
 			var gridPostData = getSearchForJqgrid("cmd", "LIST");
 			$('#grid').jqGrid({
@@ -514,6 +635,10 @@
 				search();
 			});
 
+			$("#btn_excel_export").click(function() {
+				exportToExcel();
+			});
+
 			$("input[name^=search]").keydown(function(key) {
 				if (key.keyCode == 13) {
 					$("#btn_search").click();
@@ -549,6 +674,9 @@
 			<button type="button" class="cssbtn" id="btn_search" level="R">
 				<i class="material-icons">search</i> <%= localeMessage.getString("button.search") %>
 			</button>
+			<button type="button" class="cssbtn" id="btn_excel_export" level="R">
+				<i class="material-icons">file_download</i> Excel 다운로드
+			</button>
 		</div>
 		<div class="title" id="title">API 분단위 통계</div>
 		<table class="search_condition" cellspacing="0">

src/main/java/com/eactive/eai/rms/data/entity/onl/kjb/statistics/ApiStatsHourService.java

@@ -60,6 +60,47 @@ public class ApiStatsHourService
 		return repository.findAll(builder, pageable);
 	}
 
+	public List<ApiStatsHour> selectListForExcel(ApiStatsSearch search) {
+		QApiStatsHour q = QApiStatsHour.apiStatsHour;
+		BooleanBuilder builder = new BooleanBuilder();
+
+		calculateDateRange(search);
+		if (search.getParsedStartDateTime() != null) {
+			builder.and(q.statTime.goe(search.getParsedStartDateTime()));
+			builder.and(q.statTime.loe(search.getParsedEndDateTime()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchApiName())) {
+			builder.and(q.apiName.containsIgnoreCase(search.getSearchApiName()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchGwInstanceId())) {
+			builder.and(q.gwInstanceId.containsIgnoreCase(search.getSearchGwInstanceId()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchBizDivCode())) {
+			builder.and(q.bizDivCode.containsIgnoreCase(search.getSearchBizDivCode()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchClientId())) {
+			builder.and(q.clientId.containsIgnoreCase(search.getSearchClientId()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchInboundAdapter())) {
+			builder.and(q.inboundAdapter.containsIgnoreCase(search.getSearchInboundAdapter()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchOutboundAdapter())) {
+			builder.and(q.outboundAdapter.containsIgnoreCase(search.getSearchOutboundAdapter()));
+		}
+
+		return getJPAQueryFactory()
+				.selectFrom(q)
+				.where(builder)
+				.orderBy(q.statTime.desc())
+				.fetch();
+	}
+
 	public List<ApiStatsChartUI> selectChartData(ApiStatsSearch search) {
 		QApiStatsHour q = QApiStatsHour.apiStatsHour;
 		BooleanBuilder builder = new BooleanBuilder();

src/main/java/com/eactive/eai/rms/data/entity/onl/kjb/statistics/ApiStatsMinuteService.java

@@ -62,6 +62,47 @@ public class ApiStatsMinuteService
 		return repository.findAll(builder, pageable);
 	}
 
+	public List<ApiStatsMinute> selectListForExcel(ApiStatsSearch search) {
+		QApiStatsMinute q = QApiStatsMinute.apiStatsMinute;
+		BooleanBuilder builder = new BooleanBuilder();
+
+		calculateDateRange(search);
+		if (search.getParsedStartDateTime() != null) {
+			builder.and(q.statTime.goe(search.getParsedStartDateTime()));
+			builder.and(q.statTime.loe(search.getParsedEndDateTime()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchApiName())) {
+			builder.and(q.apiName.containsIgnoreCase(search.getSearchApiName()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchGwInstanceId())) {
+			builder.and(q.gwInstanceId.containsIgnoreCase(search.getSearchGwInstanceId()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchBizDivCode())) {
+			builder.and(q.bizDivCode.containsIgnoreCase(search.getSearchBizDivCode()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchClientId())) {
+			builder.and(q.clientId.containsIgnoreCase(search.getSearchClientId()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchInboundAdapter())) {
+			builder.and(q.inboundAdapter.containsIgnoreCase(search.getSearchInboundAdapter()));
+		}
+
+		if (StringUtils.isNotBlank(search.getSearchOutboundAdapter())) {
+			builder.and(q.outboundAdapter.containsIgnoreCase(search.getSearchOutboundAdapter()));
+		}
+
+		return getJPAQueryFactory()
+				.selectFrom(q)
+				.where(builder)
+				.orderBy(q.statTime.desc())
+				.fetch();
+	}
+
 	public List<ApiStatsChartUI> selectChartData(ApiStatsSearch search) {
 		QApiStatsMinute q = QApiStatsMinute.apiStatsMinute;
 		BooleanBuilder builder = new BooleanBuilder();

src/main/java/com/eactive/ext/kjb/statistics/ApiStatsHourController.java

@@ -1,7 +1,14 @@
 package com.eactive.ext.kjb.statistics;
 
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
+import java.util.stream.Collectors;
 
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
@@ -15,6 +22,7 @@ import com.eactive.eai.rms.common.vo.GridResponse;
 import com.eactive.eai.rms.data.entity.onl.kjb.statistics.ApiStatsHour;
 import com.eactive.eai.rms.data.entity.onl.kjb.statistics.ApiStatsHourService;
 import com.eactive.ext.kjb.statistics.mapping.ApiStatsUIMapper;
+import com.eactive.ext.kjb.statistics.service.ApiStatsExcelExportService;
 import com.eactive.ext.kjb.statistics.ui.ApiStatsChartUI;
 import com.eactive.ext.kjb.statistics.ui.ApiStatsSearch;
 import com.eactive.ext.kjb.statistics.ui.ApiStatsUI;
@@ -29,6 +37,7 @@ public class ApiStatsHourController {
 
 	private final ApiStatsHourService service;
 	private final ApiStatsUIMapper mapper;
+	private final ApiStatsExcelExportService excelExportService;
 
 	@GetMapping(value = "/onl/kjb/statistics/apiStatsHourMan.view")
 	public String view() {
@@ -53,4 +62,54 @@ public class ApiStatsHourController {
 		List<ApiStatsChartUI> chartData = service.selectChartData(search);
 		return ResponseEntity.ok(chartData);
 	}
+
+	@PostMapping(value = "/onl/kjb/statistics/apiStatsHourMan.json", params = "cmd=EXCEL_EXPORT")
+	public void exportToExcel(ApiStatsSearch search, HttpServletResponse response) throws IOException {
+		log.info("Excel export started - search: {}", search);
+
+		try {
+			List<ApiStatsHour> dataList = service.selectListForExcel(search);
+			log.info("Data retrieved - count: {}", dataList.size());
+
+			if (dataList.isEmpty()) {
+				log.warn("No data found for export");
+				response.setStatus(HttpServletResponse.SC_NO_CONTENT);
+				response.setContentType("application/json; charset=UTF-8");
+				response.getWriter().write("{\"message\":\"조회된 데이터가 없습니다.\"}");
+				response.getWriter().flush();
+				return;
+			}
+
+			List<ApiStatsUI> uiList = dataList.stream()
+					.map(mapper::toVo)
+					.collect(Collectors.toList());
+			log.info("Data converted to UI list - count: {}", uiList.size());
+
+			String fileName = generateFileName(search);
+			log.info("Generating Excel file: {}", fileName);
+
+			excelExportService.exportApiStats(uiList, fileName, response);
+			log.info("Excel export completed successfully");
+
+		} catch (Exception e) {
+			log.error("Excel export failed - error: {}", e.getMessage(), e);
+
+			if (!response.isCommitted()) {
+				response.reset();
+				response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+				response.setContentType("application/json; charset=UTF-8");
+				response.getWriter().write("{\"message\":\"Excel 파일 생성 중 오류가 발생했습니다: " + e.getMessage() + "\"}");
+				response.getWriter().flush();
+			} else {
+				log.error("Cannot send error response - response already committed");
+			}
+		}
+	}
+
+	private String generateFileName(ApiStatsSearch search) {
+		String timeRange = StringUtils.isNotBlank(search.getSearchStartDateTime())
+				? search.getSearchStartDateTime()
+				: LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMddHH"));
+		return "API시간별통계_" + timeRange + ".xlsx";
+	}
 }

src/main/java/com/eactive/ext/kjb/statistics/ApiStatsMinuteController.java

@@ -1,7 +1,14 @@
 package com.eactive.ext.kjb.statistics;
 
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
+import java.util.stream.Collectors;
 
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
@@ -15,6 +22,7 @@ import com.eactive.eai.rms.common.vo.GridResponse;
 import com.eactive.eai.rms.data.entity.onl.kjb.statistics.ApiStatsMinute;
 import com.eactive.eai.rms.data.entity.onl.kjb.statistics.ApiStatsMinuteService;
 import com.eactive.ext.kjb.statistics.mapping.ApiStatsUIMapper;
+import com.eactive.ext.kjb.statistics.service.ApiStatsExcelExportService;
 import com.eactive.ext.kjb.statistics.ui.ApiStatsChartUI;
 import com.eactive.ext.kjb.statistics.ui.ApiStatsSearch;
 import com.eactive.ext.kjb.statistics.ui.ApiStatsUI;
@@ -29,6 +37,7 @@ public class ApiStatsMinuteController {
 
 	private final ApiStatsMinuteService service;
 	private final ApiStatsUIMapper mapper;
+	private final ApiStatsExcelExportService excelExportService;
 
 	@GetMapping(value = "/onl/kjb/statistics/apiStatsMinuteMan.view")
 	public String view() {
@@ -53,4 +62,54 @@ public class ApiStatsMinuteController {
 		List<ApiStatsChartUI> chartData = service.selectChartData(search);
 		return ResponseEntity.ok(chartData);
 	}
+
+	@PostMapping(value = "/onl/kjb/statistics/apiStatsMinuteMan.json", params = "cmd=EXCEL_EXPORT")
+	public void exportToExcel(ApiStatsSearch search, HttpServletResponse response) throws IOException {
+		log.info("Excel export started - search: {}", search);
+
+		try {
+			List<ApiStatsMinute> dataList = service.selectListForExcel(search);
+			log.info("Data retrieved - count: {}", dataList.size());
+
+			if (dataList.isEmpty()) {
+				log.warn("No data found for export");
+				response.setStatus(HttpServletResponse.SC_NO_CONTENT);
+				response.setContentType("application/json; charset=UTF-8");
+				response.getWriter().write("{\"message\":\"조회된 데이터가 없습니다.\"}");
+				response.getWriter().flush();
+				return;
+			}
+
+			List<ApiStatsUI> uiList = dataList.stream()
+					.map(mapper::toVo)
+					.collect(Collectors.toList());
+			log.info("Data converted to UI list - count: {}", uiList.size());
+
+			String fileName = generateFileName(search);
+			log.info("Generating Excel file: {}", fileName);
+
+			excelExportService.exportApiStats(uiList, fileName, response);
+			log.info("Excel export completed successfully");
+
+		} catch (Exception e) {
+			log.error("Excel export failed - error: {}", e.getMessage(), e);
+
+			if (!response.isCommitted()) {
+				response.reset();
+				response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+				response.setContentType("application/json; charset=UTF-8");
+				response.getWriter().write("{\"message\":\"Excel 파일 생성 중 오류가 발생했습니다: " + e.getMessage() + "\"}");
+				response.getWriter().flush();
+			} else {
+				log.error("Cannot send error response - response already committed");
+			}
+		}
+	}
+
+	private String generateFileName(ApiStatsSearch search) {
+		String timeRange = StringUtils.isNotBlank(search.getSearchStartDateTime())
+				? search.getSearchStartDateTime()
+				: LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMddHHmm"));
+		return "API분단위통계_" + timeRange + ".xlsx";
+	}
 }

src/main/java/com/eactive/ext/kjb/statistics/service/ApiStatsExcelExportService.java

@@ -0,0 +1,274 @@
+package com.eactive.ext.kjb.statistics.service;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.poi.ss.usermodel.BorderStyle;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.FillPatternType;
+import org.apache.poi.ss.usermodel.Font;
+import org.apache.poi.ss.usermodel.HorizontalAlignment;
+import org.apache.poi.ss.usermodel.IndexedColors;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.springframework.stereotype.Service;
+
+import com.eactive.ext.kjb.statistics.ui.ApiStatsUI;
+
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * API 통계 Excel Export 서비스
+ * Hour/Minute 통계 데이터를 Excel 파일로 생성
+ */
+@Slf4j
+@Service
+public class ApiStatsExcelExportService {
+
+	private static final String[] COLUMN_HEADERS = {
+		"통계시간", "API명", "인스턴스", "업무구분", "클라이언트ID",
+		"Inbound Adapter", "Outbound Adapter",
+		"총건수", "성공건수", "Timeout건수", "시스템오류건수", "업무오류건수",
+		"Seq900 Timeout", "Seq900 시스템오류", "Seq900 업무오류",
+		"평균응답시간", "최소응답시간", "최대응답시간", "P50응답시간", "P95응답시간"
+	};
+
+	/**
+	 * API 통계 데이터를 Excel 파일로 생성하여 HTTP 응답으로 전송
+	 *
+	 * @param dataList API 통계 데이터 리스트
+	 * @param fileName 다운로드 파일명
+	 * @param response HTTP 응답 객체
+	 * @throws IOException 파일 생성 실패 시
+	 */
+	public void exportApiStats(List<ApiStatsUI> dataList, String fileName, HttpServletResponse response)
+			throws IOException {
+
+		log.info("Starting Excel export - rows: {}, filename: {}", dataList.size(), fileName);
+
+		try (Workbook workbook = new XSSFWorkbook()) {
+			Sheet sheet = workbook.createSheet("API통계");
+			log.debug("Excel sheet created");
+
+			// 스타일 생성
+			CellStyle headerStyle = createHeaderStyle(workbook);
+			CellStyle stringStyle = createStringStyle(workbook);
+			CellStyle numberStyle = createNumberStyle(workbook);
+			CellStyle decimalStyle = createDecimalStyle(workbook);
+			log.debug("Excel styles created");
+
+			// 헤더 행 생성
+			createHeaderRow(sheet, headerStyle);
+			log.debug("Header row created");
+
+			// 데이터 행 생성
+			int rowNum = 1;
+			for (ApiStatsUI data : dataList) {
+				createDataRow(sheet, rowNum++, data, stringStyle, numberStyle, decimalStyle);
+			}
+			log.info("Data rows created - count: {}", dataList.size());
+
+			// 컬럼 너비 자동 조정
+			autoSizeColumns(sheet);
+			log.debug("Column widths adjusted");
+
+			// HTTP 응답 설정
+			setHttpResponse(response, fileName, workbook);
+			log.info("Excel file sent to response");
+
+		} catch (Exception e) {
+			log.error("Error creating Excel file", e);
+			throw new IOException("Excel file creation failed: " + e.getMessage(), e);
+		}
+	}
+
+	/**
+	 * 헤더 스타일 생성 (회색 배경, 볼드, 테두리)
+	 */
+	private CellStyle createHeaderStyle(Workbook workbook) {
+		CellStyle style = workbook.createCellStyle();
+
+		// 배경색
+		style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
+		style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
+
+		// 테두리
+		style.setBorderTop(BorderStyle.THIN);
+		style.setBorderBottom(BorderStyle.THIN);
+		style.setBorderLeft(BorderStyle.THIN);
+		style.setBorderRight(BorderStyle.THIN);
+
+		// 정렬
+		style.setAlignment(HorizontalAlignment.CENTER);
+
+		// 폰트 (볼드)
+		Font font = workbook.createFont();
+		font.setBold(true);
+		style.setFont(font);
+
+		return style;
+	}
+
+	/**
+	 * 문자열 데이터 스타일 생성 (기본 테두리)
+	 */
+	private CellStyle createStringStyle(Workbook workbook) {
+		CellStyle style = workbook.createCellStyle();
+		style.setBorderTop(BorderStyle.THIN);
+		style.setBorderBottom(BorderStyle.THIN);
+		style.setBorderLeft(BorderStyle.THIN);
+		style.setBorderRight(BorderStyle.THIN);
+		return style;
+	}
+
+	/**
+	 * 숫자 데이터 스타일 생성 (우측정렬 + 쉼표 구분)
+	 */
+	private CellStyle createNumberStyle(Workbook workbook) {
+		CellStyle style = workbook.createCellStyle();
+		style.setBorderTop(BorderStyle.THIN);
+		style.setBorderBottom(BorderStyle.THIN);
+		style.setBorderLeft(BorderStyle.THIN);
+		style.setBorderRight(BorderStyle.THIN);
+		style.setAlignment(HorizontalAlignment.RIGHT);
+		style.setDataFormat(workbook.createDataFormat().getFormat("#,##0"));
+		return style;
+	}
+
+	/**
+	 * 소수점 데이터 스타일 생성 (우측정렬 + 소수점 3자리)
+	 */
+	private CellStyle createDecimalStyle(Workbook workbook) {
+		CellStyle style = workbook.createCellStyle();
+		style.setBorderTop(BorderStyle.THIN);
+		style.setBorderBottom(BorderStyle.THIN);
+		style.setBorderLeft(BorderStyle.THIN);
+		style.setBorderRight(BorderStyle.THIN);
+		style.setAlignment(HorizontalAlignment.RIGHT);
+		style.setDataFormat(workbook.createDataFormat().getFormat("0.000"));
+		return style;
+	}
+
+	/**
+	 * 헤더 행 생성
+	 */
+	private void createHeaderRow(Sheet sheet, CellStyle headerStyle) {
+		Row headerRow = sheet.createRow(0);
+
+		for (int i = 0; i < COLUMN_HEADERS.length; i++) {
+			Cell cell = headerRow.createCell(i);
+			cell.setCellValue(COLUMN_HEADERS[i]);
+			cell.setCellStyle(headerStyle);
+		}
+	}
+
+	/**
+	 * 데이터 행 생성
+	 */
+	private void createDataRow(Sheet sheet, int rowNum, ApiStatsUI data,
+			CellStyle stringStyle, CellStyle numberStyle, CellStyle decimalStyle) {
+
+		Row row = sheet.createRow(rowNum);
+		int colNum = 0;
+
+		// 문자열 컬럼 (0-6)
+		createStringCell(row, colNum++, data.getStatTime(), stringStyle);
+		createStringCell(row, colNum++, data.getApiName(), stringStyle);
+		createStringCell(row, colNum++, data.getGwInstanceId(), stringStyle);
+		createStringCell(row, colNum++, data.getBizDivCode(), stringStyle);
+		createStringCell(row, colNum++, data.getClientId(), stringStyle);
+		createStringCell(row, colNum++, data.getInboundAdapter(), stringStyle);
+		createStringCell(row, colNum++, data.getOutboundAdapter(), stringStyle);
+
+		// 숫자 컬럼 (7-14)
+		createLongCell(row, colNum++, data.getTotalCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getSuccessCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getTimeoutCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getSystemErrCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getBizErrCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getSeq900TimeoutCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getSeq900SystemErrCnt(), numberStyle);
+		createLongCell(row, colNum++, data.getSeq900BizErrCnt(), numberStyle);
+
+		// 소수점 컬럼 (15-19)
+		createDecimalCell(row, colNum++, data.getAvgRespTime(), decimalStyle);
+		createDecimalCell(row, colNum++, data.getMinRespTime(), decimalStyle);
+		createDecimalCell(row, colNum++, data.getMaxRespTime(), decimalStyle);
+		createDecimalCell(row, colNum++, data.getP50RespTime(), decimalStyle);
+		createDecimalCell(row, colNum++, data.getP95RespTime(), decimalStyle);
+	}
+
+	/**
+	 * 문자열 셀 생성
+	 */
+	private void createStringCell(Row row, int colNum, String value, CellStyle style) {
+		Cell cell = row.createCell(colNum);
+		cell.setCellValue(value != null ? value : "");
+		cell.setCellStyle(style);
+	}
+
+	/**
+	 * Long 타입 숫자 셀 생성
+	 */
+	private void createLongCell(Row row, int colNum, Long value, CellStyle style) {
+		Cell cell = row.createCell(colNum);
+		if (value != null) {
+			cell.setCellValue(value.doubleValue());
+		} else {
+			cell.setCellValue(0);
+		}
+		cell.setCellStyle(style);
+	}
+
+	/**
+	 * BigDecimal 타입 소수점 셀 생성
+	 */
+	private void createDecimalCell(Row row, int colNum, BigDecimal value, CellStyle style) {
+		Cell cell = row.createCell(colNum);
+		if (value != null) {
+			cell.setCellValue(value.doubleValue());
+		} else {
+			cell.setCellValue(0.0);
+		}
+		cell.setCellStyle(style);
+	}
+
+	/**
+	 * 컬럼 너비 자동 조정
+	 */
+	private void autoSizeColumns(Sheet sheet) {
+		for (int i = 0; i < COLUMN_HEADERS.length; i++) {
+			sheet.autoSizeColumn(i);
+			// 한글 문자 고려하여 약간 여유 공간 추가
+			sheet.setColumnWidth(i, sheet.getColumnWidth(i) + 512);
+		}
+	}
+
+	/**
+	 * HTTP 응답 설정 및 파일 전송
+	 */
+	private void setHttpResponse(HttpServletResponse response, String fileName, Workbook workbook)
+			throws IOException {
+
+		// Content-Type 설정
+		response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
+
+		// Content-Disposition 설정 (파일명 UTF-8 인코딩)
+		String encodedFileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8.toString())
+				.replaceAll("\\+", "%20");
+		response.setHeader("Content-Disposition",
+				"attachment; filename=\"" + encodedFileName + "\"; filename*=UTF-8''" + encodedFileName);
+
+		// Workbook을 응답 스트림으로 전송
+		workbook.write(response.getOutputStream());
+		response.getOutputStream().flush();
+	}
+}