fix: parse string datetime cells in external import

ruoyi-bussiness/src/main/java/com/ruoyi/cms/externalimport/ExternalJobExcelParser.java

@@ -1,6 +1,7 @@
 package com.ruoyi.cms.externalimport;
 
 import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellType;
 import org.apache.poi.ss.usermodel.DataFormatter;
 import org.apache.poi.ss.usermodel.DateUtil;
 import org.apache.poi.ss.usermodel.Row;
@@ -11,11 +12,14 @@ import org.apache.poi.ss.usermodel.WorkbookFactory;
 import java.io.IOException;
 import java.io.InputStream;
 import java.text.SimpleDateFormat;
+import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * 解析外部岗位模板。此解析器明确处理 Excel 日期单元格，替代旧导入逻辑中日期全部丢失的行为。
@@ -24,6 +28,7 @@ public class ExternalJobExcelParser {
     private static final String[] REQUIRED_HEADERS = {
             "Aca112", "Acb22a", "SalaryLow", "SalaryHight", "Aae397", "AAB004", "ORG", "ACE760", "Collect_time"
     };
+    private static final Pattern TEXT_DATE_PATTERN = Pattern.compile("^\\s*(\\d{4})\\D+(\\d{1,2})\\D+(\\d{1,2}).*$");
     private final DataFormatter formatter = new DataFormatter();
     private final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
 
@@ -114,11 +119,39 @@ public class ExternalJobExcelParser {
         if (cell == null) {
             return "";
         }
-        if (DateUtil.isCellDateFormatted(cell)) {
+        if (isNumericDateCell(cell)) {
             Date value = cell.getDateCellValue();
             return value == null ? "" : dateFormat.format(value);
         }
-        return formatter.formatCellValue(cell).trim();
+        return normalizeTextDate(formatter.formatCellValue(cell));
+    }
+
+    /**
+     * DateUtil.isCellDateFormatted 会对 STRING 单元格读取数值，导致 POI 抛出类型不匹配异常。
+     * 只有数值型或数值结果公式才允许进入 Excel 日期格式判断。
+     */
+    private boolean isNumericDateCell(Cell cell) {
+        CellType type = cell.getCellType();
+        if (type == CellType.NUMERIC) {
+            return DateUtil.isCellDateFormatted(cell);
+        }
+        return type == CellType.FORMULA
+                && cell.getCachedFormulaResultType() == CellType.NUMERIC
+                && DateUtil.isCellDateFormatted(cell);
+    }
+
+    /** 将 2026-07-14 00:00:00、2026/7/14、2026年7月14日 等文本统一为 ISO 日期。 */
+    private String normalizeTextDate(String value) {
+        String text = value == null ? "" : value.trim();
+        Matcher matcher = TEXT_DATE_PATTERN.matcher(text);
+        if (!matcher.matches()) {
+            return text;
+        }
+        try {
+            return LocalDate.of(Integer.parseInt(matcher.group(1)), Integer.parseInt(matcher.group(2)), Integer.parseInt(matcher.group(3))).toString();
+        } catch (Exception ex) {
+            return text;
+        }
     }
 
     private boolean isBlank(Row row) {

ruoyi-bussiness/src/test/java/com/ruoyi/cms/externalimport/ExternalJobExcelParserTest.java

@@ -16,7 +16,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 class ExternalJobExcelParserTest {
     @Test
     void parsesExcelDatesAndLocationFallback() throws Exception {
-        byte[] data = workbookBytes();
+        byte[] data = workbookBytes(false);
         List<ExternalJobCandidate> rows = new ExternalJobExcelParser().parse(new ByteArrayInputStream(data));
 
         assertEquals(1, rows.size());
@@ -27,7 +27,16 @@ class ExternalJobExcelParserTest {
         assertEquals("Java 工程师", row.getJobTitle());
     }
 
-    private byte[] workbookBytes() throws Exception {
+    @Test
+    void parsesStringDateTimeCellsWithoutTreatingThemAsNumericDates() throws Exception {
+        List<ExternalJobCandidate> rows = new ExternalJobExcelParser().parse(new ByteArrayInputStream(workbookBytes(true)));
+
+        assertEquals(1, rows.size());
+        assertEquals("2026-07-14", rows.get(0).getPostingDate());
+        assertEquals("2026-07-20", rows.get(0).getCollectDate());
+    }
+
+    private byte[] workbookBytes(boolean useStringDateTimes) throws Exception {
         String[] headers = {"Aca112", "Acb22a", "SalaryLow", "SalaryHight", "Aae397", "AAB004", "ORG", "ACE760", "Collect_time", "City"};
         try (XSSFWorkbook workbook = new XSSFWorkbook(); ByteArrayOutputStream output = new ByteArrayOutputStream()) {
             Row header = workbook.createSheet("合并数据").createRow(0);
@@ -41,13 +50,21 @@ class ExternalJobExcelParserTest {
             data.createCell(1).setCellValue("负责平台开发");
             data.createCell(2).setCellValue(5000);
             data.createCell(3).setCellValue(10000);
+            if (useStringDateTimes) {
+                data.createCell(4).setCellValue("2026-07-14 00:00:00");
+            } else {
                 data.createCell(4).setCellValue(Date.from(LocalDate.of(2026, 7, 14).atStartOfDay(java.time.ZoneId.systemDefault()).toInstant()));
                 data.getCell(4).setCellStyle(dateStyle);
+            }
             data.createCell(5).setCellValue("示例企业");
             data.createCell(6).setCellValue("智联招聘");
             data.createCell(7).setCellValue("https://www.zhaopin.com/job/42");
+            if (useStringDateTimes) {
+                data.createCell(8).setCellValue("2026-07-20 00:00:00");
+            } else {
                 data.createCell(8).setCellValue(Date.from(LocalDate.of(2026, 7, 20).atStartOfDay(java.time.ZoneId.systemDefault()).toInstant()));
                 data.getCell(8).setCellStyle(dateStyle);
+            }
             data.createCell(9).setCellValue("石河子市");
             workbook.write(output);
             return output.toByteArray();