Fix StackOverflow when exporting POJOs with custom converters

fesod-sheet/src/main/java/org/apache/fesod/sheet/write/metadata/holder/WriteSheetHolder.java

@@ -47,7 +47,7 @@
  */
 @Getter
 @Setter
-@EqualsAndHashCode
+@EqualsAndHashCode(exclude = {"parentWriteWorkbookHolder", "hasBeenInitializedTable"})
 @NoArgsConstructor
 public class WriteSheetHolder extends AbstractWriteHolder {
     /**

fesod-sheet/src/main/java/org/apache/fesod/sheet/write/metadata/holder/WriteTableHolder.java

@@ -38,7 +38,7 @@
  */
 @Getter
 @Setter
-@EqualsAndHashCode
+@EqualsAndHashCode(exclude = {"parentWriteSheetHolder"})
 public class WriteTableHolder extends AbstractWriteHolder {
     /***
      * poi sheet

fesod-sheet/src/test/java/org/apache/fesod/sheet/converter/ZonedDateTimeConverterTest.java

@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.fesod.sheet.converter;
+
+import java.io.ByteArrayOutputStream;
+import java.math.BigDecimal;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import lombok.Getter;
+import lombok.Setter;
+import org.apache.fesod.sheet.FesodSheet;
+import org.apache.fesod.sheet.annotation.ExcelProperty;
+import org.apache.fesod.sheet.annotation.format.DateTimeFormat;
+import org.apache.fesod.sheet.annotation.format.NumberFormat;
+import org.apache.fesod.sheet.converters.Converter;
+import org.apache.fesod.sheet.enums.CellDataTypeEnum;
+import org.apache.fesod.sheet.metadata.GlobalConfiguration;
+import org.apache.fesod.sheet.metadata.data.WriteCellData;
+import org.apache.fesod.sheet.metadata.property.ExcelContentProperty;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class ZonedDateTimeConverterTest {
+
+    @Test
+    void writePojoWithZonedDateTimeAndCustomConverter() {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        MixedMetadataRow row = new MixedMetadataRow();
+        row.setStatus("ACTIVE");
+        row.setAmount(new BigDecimal("1234.5"));
+        row.setCreatedAt(ZonedDateTime.of(2026, 3, 24, 15, 30, 45, 0, ZoneId.of("Asia/Shanghai")));
+
+        Assertions.assertDoesNotThrow(() -> FesodSheet.write(out, MixedMetadataRow.class)
+                .registerConverter(new ZonedDateStringConverter())
+                .sheet("Sheet1")
+                .doWrite(List.of(row)));
+    }
+
+    @Getter
+    @Setter
+    public static class MixedMetadataRow {
+        @ExcelProperty(value = "Status", converter = StatusLabelConverter.class)
+        private String status;
+
+        @ExcelProperty("Amount")
+        @NumberFormat("¥#,##0.00")
+        private BigDecimal amount;
+
+        @ExcelProperty("Created At")
+        @DateTimeFormat("yyyy-MM-dd HH:mm:ss")
+        private ZonedDateTime createdAt;
+    }
+
+    public static class StatusLabelConverter implements Converter<String> {
+        @Override
+        public Class<?> supportJavaTypeKey() {
+            return String.class;
+        }
+
+        @Override
+        public CellDataTypeEnum supportExcelTypeKey() {
+            return CellDataTypeEnum.STRING;
+        }
+
+        @Override
+        public WriteCellData<?> convertToExcelData(
+                String value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
+            return new WriteCellData<>("STATUS:" + value);
+        }
+    }
+
+    public static class ZonedDateStringConverter implements Converter<ZonedDateTime> {
+        @Override
+        public Class<?> supportJavaTypeKey() {
+            return ZonedDateTime.class;
+        }
+
+        @Override
+        public CellDataTypeEnum supportExcelTypeKey() {
+            return CellDataTypeEnum.STRING;
+        }
+
+        @Override
+        public WriteCellData<?> convertToExcelData(
+                ZonedDateTime value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
+            String fmt = contentProperty != null && contentProperty.getDateTimeFormatProperty() != null
+                    ? contentProperty.getDateTimeFormatProperty().getFormat()
+                    : "yyyy-MM-dd HH:mm:ss";
+            return new WriteCellData<>(value.toLocalDateTime().format(DateTimeFormatter.ofPattern(fmt)));
+        }
+    }
+}