修改合并异常

src/main/java/com/alibaba/excel/converters/DefaultConverterLoader.java

@@ -117,7 +117,6 @@ public class DefaultConverterLoader {
         putWriteConverter(new ByteArrayImageConverter());
         putWriteConverter(new BoxingByteArrayImageConverter());
         putWriteConverter(new UrlImageConverter());
-        putWriteConverter(new BigIntegerStringConverter());
 
         // In some cases, it must be converted to string
         putWriteStringConverter(new BigDecimalStringConverter());
@@ -130,6 +129,7 @@ public class DefaultConverterLoader {
         putWriteStringConverter(new LongStringConverter());
         putWriteStringConverter(new ShortStringConverter());
         putWriteStringConverter(new StringStringConverter());
+        putWriteStringConverter(new BigIntegerStringConverter());
     }
 
     /**

src/main/java/com/alibaba/excel/converters/biginteger/BigIntegerStringConverter.java

@@ -1,13 +1,13 @@
 package com.alibaba.excel.converters.biginteger;
 
-import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.text.ParseException;
 
 import com.alibaba.excel.converters.Converter;
 import com.alibaba.excel.enums.CellDataTypeEnum;
-import com.alibaba.excel.metadata.CellData;
 import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
 import com.alibaba.excel.metadata.property.ExcelContentProperty;
 import com.alibaba.excel.util.NumberUtils;
 
@@ -19,7 +19,7 @@ import com.alibaba.excel.util.NumberUtils;
 public class BigIntegerStringConverter implements Converter<BigInteger> {
 
     @Override
-    public Class supportJavaTypeKey() {
+    public Class<BigInteger> supportJavaTypeKey() {
         return BigInteger.class;
     }
 
@@ -29,14 +29,14 @@ public class BigIntegerStringConverter implements Converter<BigInteger> {
     }
 
     @Override
-    public BigInteger convertToJavaData(CellData cellData, ExcelContentProperty contentProperty,
-                                        GlobalConfiguration globalConfiguration) throws ParseException {
+    public BigInteger convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) throws ParseException {
         return NumberUtils.parseBigDecimal(cellData.getStringValue(), contentProperty).toBigInteger();
     }
 
     @Override
-    public CellData convertToExcelData(BigInteger value, ExcelContentProperty contentProperty,
-                                       GlobalConfiguration globalConfiguration) {
+    public WriteCellData<?> convertToExcelData(BigInteger value, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) {
         return NumberUtils.formatToCellData(value, contentProperty);
     }
 }