修改空数据的时候异常

src/main/java/com/alibaba/excel/analysis/csv/CsvExcelReadExecutor.java

@@ -20,6 +20,7 @@ import com.alibaba.excel.read.metadata.ReadSheet;
 import com.alibaba.excel.read.metadata.holder.ReadRowHolder;
 import com.alibaba.excel.read.metadata.holder.csv.CsvReadWorkbookHolder;
 import com.alibaba.excel.util.SheetUtils;
+import com.alibaba.excel.util.StringUtils;
 
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.collections4.MapUtils;
@@ -27,7 +28,7 @@ import org.apache.commons.csv.CSVFormat;
 import org.apache.commons.csv.CSVRecord;
 
 /**
- * azz
+ * read executor
  *
  * @author zhuangjiaju
  */
@@ -66,10 +67,11 @@ public class CsvExcelReadExecutor implements ExcelReadExecutor {
             csvReadContext.currentSheet(readSheet);
 
             int rowIndex = 0;
-            for (CSVRecord record : parseRecords) {
 
+            for (CSVRecord record : parseRecords) {
                 dealRecord(record, rowIndex++);
             }
+
             // The last sheet is read
             csvReadContext.analysisEventProcessor().endSheet(csvReadContext);
         }
@@ -95,8 +97,14 @@ public class CsvExcelReadExecutor implements ExcelReadExecutor {
         while (cellIterator.hasNext()) {
             String cellString = cellIterator.next();
             ReadCellData<String> readCellData = new ReadCellData<>();
+
+            // csv is an empty string of whether <code>,,</code> is read or <code>,"",</code>
+            if (StringUtils.isNotBlank(cellString)) {
                 readCellData.setType(CellDataTypeEnum.STRING);
                 readCellData.setStringValue(cellString);
+            } else {
+                readCellData.setType(CellDataTypeEnum.EMPTY);
+            }
             cellMap.put(cellIndex++, readCellData);
         }
 

src/main/java/com/alibaba/excel/metadata/AbstractHolder.java

@@ -61,6 +61,14 @@ public abstract class AbstractHolder implements ConfigurationHolder {
             globalConfiguration.setAutoTrim(basicParameter.getAutoTrim());
         }
 
+        if (basicParameter.getUse1904windowing() == null) {
+            if (prentAbstractHolder != null) {
+                globalConfiguration.setUse1904windowing(
+                    prentAbstractHolder.getGlobalConfiguration().getUse1904windowing());
+            }
+        } else {
+            globalConfiguration.setUse1904windowing(basicParameter.getUse1904windowing());
+        }
 
         if (basicParameter.getLocale() == null) {
             if (prentAbstractHolder != null) {

src/main/java/com/alibaba/excel/metadata/csv/CsvDataFormat.java

@@ -45,8 +45,8 @@ public class CsvDataFormat implements DataFormat {
         if (index != null) {
             return index;
         }
+        index = (short)(formatList.size() + BuiltinFormats.MIN_CUSTOM_DATA_FORMAT_INDEX);
         formatList.add(format);
-        index = (short)formatList.size();
         formatMap.put(format, index);
         return index;
     }
@@ -57,7 +57,7 @@ public class CsvDataFormat implements DataFormat {
             return builtinFormats[index];
         }
         int actualIndex = index - BuiltinFormats.MIN_CUSTOM_DATA_FORMAT_INDEX;
-        if (actualIndex >= 0 && actualIndex < formatList.size()) {
+        if (actualIndex < formatList.size()) {
             return formatList.get(actualIndex);
         }
         return null;

src/main/java/com/alibaba/excel/metadata/csv/CsvSheet.java

@@ -748,7 +748,6 @@ public class CsvSheet implements Sheet, Closeable {
         switch (csvCell.getCellType()) {
             case STRING:
             case ERROR:
-            case FORMULA:
                 return csvCell.getStringCellValue();
             case NUMERIC:
                 Short dataFormat = null;
@@ -782,6 +781,9 @@ public class CsvSheet implements Sheet, Closeable {
                         dataFormat = BuiltinFormats.GENERAL;
                         dataFormatString = csvWorkbook.createDataFormat().getFormat(dataFormat);
                     }
+                    if (dataFormatString == null) {
+                        dataFormatString = csvWorkbook.createDataFormat().getFormat(dataFormat);
+                    }
                     return NumberDataFormatterUtils.format(csvCell.getNumericCellValue(), dataFormat, dataFormatString,
                         csvWorkbook.getUse1904windowing(), csvWorkbook.getLocale(),
                         csvWorkbook.getUseScientificFormat());

src/main/java/com/alibaba/excel/read/metadata/holder/AbstractReadHolder.java

@@ -50,15 +50,6 @@ public abstract class AbstractReadHolder extends AbstractHolder implements ReadH
         Boolean convertAllFiled) {
         super(readBasicParameter, parentAbstractReadHolder);
 
-        if (readBasicParameter.getUse1904windowing() == null) {
-            if (parentAbstractReadHolder != null) {
-                getGlobalConfiguration()
-                    .setUse1904windowing(parentAbstractReadHolder.getGlobalConfiguration().getUse1904windowing());
-            }
-        } else {
-            getGlobalConfiguration().setUse1904windowing(readBasicParameter.getUse1904windowing());
-        }
-
         if (readBasicParameter.getUseScientificFormat() == null) {
             if (parentAbstractReadHolder != null) {
                 getGlobalConfiguration().setUseScientificFormat(

src/main/java/com/alibaba/excel/read/metadata/holder/csv/CsvReadWorkbookHolder.java

@@ -20,6 +20,6 @@ public class CsvReadWorkbookHolder extends ReadWorkbookHolder {
     public CsvReadWorkbookHolder(ReadWorkbook readWorkbook) {
         super(readWorkbook);
         setExcelType(ExcelTypeEnum.CSV);
-        csvFormat = CSVFormat.DEFAULT;
+        this.csvFormat = CSVFormat.DEFAULT;
     }
 }

src/main/java/com/alibaba/excel/util/DateUtils.java

@@ -133,7 +133,7 @@ public class DateUtils {
      */
     public static String format(Date date, String dateFormat) {
         if (date == null) {
-            return "";
+            return null;
         }
         if (StringUtils.isEmpty(dateFormat)) {
             dateFormat = defaultDateFormat;

src/main/java/com/alibaba/excel/write/executor/AbstractExcelWriteExecutor.java

@@ -17,8 +17,10 @@ import com.alibaba.excel.metadata.data.ImageData;
 import com.alibaba.excel.metadata.data.WriteCellData;
 import com.alibaba.excel.metadata.property.ExcelContentProperty;
 import com.alibaba.excel.support.ExcelTypeEnum;
+import com.alibaba.excel.util.DateUtils;
 import com.alibaba.excel.util.FileTypeUtils;
 import com.alibaba.excel.util.StyleUtil;
+import com.alibaba.excel.util.WorkBookUtil;
 import com.alibaba.excel.util.WriteHandlerUtils;
 import com.alibaba.excel.write.metadata.holder.WriteHolder;
 import com.alibaba.excel.write.metadata.style.WriteCellStyle;
@@ -231,6 +233,9 @@ public abstract class AbstractExcelWriteExecutor implements ExcelWriteExecutor {
             }
             WriteCellData<?> cellDataValue = (WriteCellData<?>)value;
             if (cellDataValue.getType() != null) {
+                // Configuration information may not be read here
+                fillProperty(cellDataValue, excelContentProperty);
+
                 return cellDataValue;
             } else {
                 if (cellDataValue.getData() == null) {
@@ -262,6 +267,27 @@ public abstract class AbstractExcelWriteExecutor implements ExcelWriteExecutor {
         return doConvert(currentWriteHolder, clazz, targetType, cell, value, excelContentProperty);
     }
 
+    private void fillProperty(WriteCellData<?> cellDataValue, ExcelContentProperty excelContentProperty) {
+        switch (cellDataValue.getType()) {
+            case DATE:
+                String dateFormat = null;
+                if (excelContentProperty != null && excelContentProperty.getDateTimeFormatProperty() != null) {
+                    dateFormat = excelContentProperty.getDateTimeFormatProperty().getFormat();
+                }
+                WorkBookUtil.fillDataFormat(cellDataValue, dateFormat, DateUtils.defaultDateFormat);
+                return;
+            case NUMBER:
+                String numberFormat = null;
+                if (excelContentProperty != null && excelContentProperty.getNumberFormatProperty() != null) {
+                    numberFormat = excelContentProperty.getNumberFormatProperty().getFormat();
+                }
+                WorkBookUtil.fillDataFormat(cellDataValue, numberFormat, null);
+                return;
+            default:
+                return;
+        }
+    }
+
     private WriteCellData<?> doConvert(WriteHolder currentWriteHolder, Class<?> clazz, CellDataTypeEnum targetType,
         Cell cell, Object value, ExcelContentProperty excelContentProperty) {
         Converter<?> converter = null;

src/main/java/com/alibaba/excel/write/metadata/holder/AbstractWriteHolder.java

@@ -97,14 +97,6 @@ public abstract class AbstractWriteHolder extends AbstractHolder implements Writ
         Boolean convertAllField) {
         super(writeBasicParameter, parentAbstractWriteHolder);
 
-        if (writeBasicParameter.getUse1904windowing() == null) {
-            if (parentAbstractWriteHolder != null) {
-                getGlobalConfiguration()
-                    .setUse1904windowing(parentAbstractWriteHolder.getGlobalConfiguration().getUse1904windowing());
-            }
-        } else {
-            getGlobalConfiguration().setUse1904windowing(writeBasicParameter.getUse1904windowing());
-        }
 
         if (writeBasicParameter.getUseScientificFormat() != null) {
             throw new UnsupportedOperationException("Currently does not support setting useScientificFormat.");

src/test/java/com/alibaba/easyexcel/test/core/celldata/CellDataDataListener.java

@@ -5,6 +5,7 @@ import java.util.List;
 
 import com.alibaba.excel.context.AnalysisContext;
 import com.alibaba.excel.event.AnalysisEventListener;
+import com.alibaba.excel.support.ExcelTypeEnum;
 import com.alibaba.fastjson.JSON;
 
 import org.junit.Assert;
@@ -28,10 +29,14 @@ public class CellDataDataListener extends AnalysisEventListener<CellDataReadData
         Assert.assertEquals(list.size(), 1);
         CellDataReadData cellDataData = list.get(0);
 
-        Assert.assertEquals(cellDataData.getDate().getData(), "2020年01月01日");
+        Assert.assertEquals("2020年01月01日", cellDataData.getDate().getData());
         Assert.assertEquals((long)cellDataData.getInteger1().getData(), 2L);
         Assert.assertEquals((long)cellDataData.getInteger2(), 2L);
+        if (context.readWorkbookHolder().getExcelType() != ExcelTypeEnum.CSV) {
             Assert.assertEquals(cellDataData.getFormulaValue().getFormulaData().getFormulaValue(), "B2+C2");
+        } else {
+            Assert.assertEquals(cellDataData.getFormulaValue().getData(), "");
+        }
         LOGGER.debug("First row:{}", JSON.toJSONString(list.get(0)));
     }
 }

src/test/java/com/alibaba/easyexcel/test/temp/csv/CsvDataListeer.java

@@ -0,0 +1,20 @@
+package com.alibaba.easyexcel.test.temp.csv;
+
+import com.alibaba.excel.context.AnalysisContext;
+import com.alibaba.excel.event.AnalysisEventListener;
+import com.alibaba.fastjson.JSON;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class CsvDataListeer extends AnalysisEventListener<CsvData> {
+    @Override
+    public void invoke(CsvData data, AnalysisContext context) {
+        log.info("data:{}", JSON.toJSONString(data));
+    }
+
+    @Override
+    public void doAfterAllAnalysed(AnalysisContext context) {
+
+    }
+}

src/test/java/com/alibaba/easyexcel/test/temp/csv/CsvReadTest.java

@@ -5,7 +5,6 @@ import java.io.FileInputStream;
 import java.io.FileReader;
 import java.io.PrintWriter;
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.List;
 
 import com.alibaba.easyexcel.test.util.TestFileUtil;
@@ -38,8 +37,8 @@ public class CsvReadTest {
 
     @Test
     public void read1() throws Exception {
-        Iterable<CSVRecord> records = CSVFormat.DEFAULT.parse(
-            new FileReader("/Users/zhuangjiaju/IdeaProjects/easyexcel/target/test-classes/csvWrite1.csv"));
+        Iterable<CSVRecord> records = CSVFormat.DEFAULT.withNullString("").parse(
+            new FileReader("/Users/zhuangjiaju/IdeaProjects/easyexcel/target/test-classes/t1.csv"));
         for (CSVRecord record : records) {
             String lastName = record.get(0);
             String firstName = record.get(1);
@@ -71,6 +70,8 @@ public class CsvReadTest {
         // 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭
         // 如果这里想使用03 则 传入excelType参数即可
         EasyExcel.write(fileName, CsvData.class).sheet().doWrite(data());
+
+        EasyExcel.read(fileName, CsvData.class, new CsvDataListeer()).sheet().doRead();
     }
 
     @Test
@@ -85,7 +86,7 @@ public class CsvReadTest {
         for (int i = 0; i < 10; i++) {
             CsvData data = new CsvData();
             data.setString("字符,串" + i);
-            data.setDate(new Date());
+            //data.setDate(new Date());
             data.setDoubleData(0.56);
             data.setIgnore("忽略" + i);
             list.add(data);