修复多个头的情况下会读取数据为空

pom.xml

@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.alibaba</groupId>
     <artifactId>easyexcel</artifactId>
-    <version>2.1.0-beta3</version>
+    <version>2.1.0-beta4</version>
     <packaging>jar</packaging>
     <name>easyexcel</name>
 
@@ -132,11 +132,11 @@
 
     <build>
         <plugins>
-            <!-- 用pmd校验阿里的p3c规范 -->
+            <!-- code style -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-pmd-plugin</artifactId>
-                <version>3.12.0</version>
+                <version>3.8</version>
                 <configuration>
                     <printFailingErrors>true</printFailingErrors>
                     <verbose>true</verbose>
@@ -157,7 +157,6 @@
                     </excludes>
                 </configuration>
                 <executions>
-                    <!-- 绑定pmd:check到verify生命周期 -->
                     <execution>
                         <id>pmd-check-verify</id>
                         <phase>validate</phase>
@@ -170,7 +169,7 @@
                     <dependency>
                         <groupId>com.alibaba.p3c</groupId>
                         <artifactId>p3c-pmd</artifactId>
-                        <version>2.0.0</version>
+                        <version>1.3.6</version>
                     </dependency>
                 </dependencies>
             </plugin>

src/main/java/com/alibaba/excel/context/WriteContextImpl.java

@@ -1,27 +1,17 @@
 package com.alibaba.excel.context;
 
-import com.alibaba.excel.support.ExcelTypeEnum;
-import com.alibaba.excel.util.FileUtils;
-import com.alibaba.excel.util.StringUtils;
-
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.FileOutputStream;
-import java.io.InputStream;
 import java.io.OutputStream;
-import java.security.GeneralSecurityException;
 import java.util.Map;
 import java.util.UUID;
 
 import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey;
-import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.openxml4j.opc.OPCPackage;
 import org.apache.poi.openxml4j.opc.PackageAccess;
-import org.apache.poi.poifs.crypt.Decryptor;
 import org.apache.poi.poifs.crypt.EncryptionInfo;
 import org.apache.poi.poifs.crypt.EncryptionMode;
 import org.apache.poi.poifs.crypt.Encryptor;
-import org.apache.poi.poifs.filesystem.DocumentOutputStream;
 import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.Row;
@@ -36,6 +26,9 @@ import com.alibaba.excel.enums.WriteTypeEnum;
 import com.alibaba.excel.exception.ExcelGenerateException;
 import com.alibaba.excel.metadata.CellData;
 import com.alibaba.excel.metadata.Head;
+import com.alibaba.excel.support.ExcelTypeEnum;
+import com.alibaba.excel.util.FileUtils;
+import com.alibaba.excel.util.StringUtils;
 import com.alibaba.excel.util.WorkBookUtil;
 import com.alibaba.excel.util.WriteHandlerUtils;
 import com.alibaba.excel.write.metadata.WriteSheet;
@@ -179,7 +172,7 @@ public class WriteContextImpl implements WriteContext {
             Row row = WorkBookUtil.createRow(writeSheetHolder.getSheet(), i);
             WriteHandlerUtils.afterRowCreate(this, row, relativeRowIndex, Boolean.TRUE);
             addOneRowOfHeadDataToExcel(row, excelWriteHeadProperty.getHeadMap(), relativeRowIndex);
-            WriteHandlerUtils.afterRowDispose(this, row, relativeRowIndex, Boolean.FALSE);
+            WriteHandlerUtils.afterRowDispose(this, row, relativeRowIndex, Boolean.TRUE);
         }
     }
 

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

@@ -202,6 +202,9 @@ public class CellData<T> {
      * Ensure that the object does not appear null
      */
     public void checkEmpty() {
+        if (type == null) {
+            type = CellDataTypeEnum.EMPTY;
+        }
         switch (type) {
             case STRING:
             case ERROR:
@@ -225,6 +228,9 @@ public class CellData<T> {
 
     @Override
     public String toString() {
+        if (type == null) {
+            return "empty";
+        }
         switch (type) {
             case NUMBER:
                 return numberValue.toString();

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

@@ -158,7 +158,6 @@ public abstract class AbstractReadHolder extends AbstractHolder implements ReadH
             if (currentheadRowNumber == rowIndex + 1) {
                 buildHead(analysisContext, cellDataMap);
             }
-
             // Now is header
             for (ReadListener readListener : analysisContext.currentReadHolder().readListenerList()) {
                 try {
@@ -206,8 +205,8 @@ public abstract class AbstractReadHolder extends AbstractHolder implements ReadH
                 tmpContentPropertyMap.put(entry.getKey(), contentPropertyMapData.get(entry.getKey()));
                 continue;
             }
-            String headName = headData.getHeadNameList().get(0);
+            List<String> headNameList = headData.getHeadNameList();
-
+            String headName = headNameList.get(headNameList.size() - 1);
             for (Map.Entry<Integer, String> stringEntry : dataMap.entrySet()) {
                 String headString = stringEntry.getValue();
                 Integer stringKey = stringEntry.getKey();

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

@@ -31,7 +31,7 @@ public abstract class AbstractExcelWriteExecutor implements ExcelWriteExecutor {
     protected CellData converterAndSet(WriteHolder currentWriteHolder, Class clazz, Cell cell, Object value,
         ExcelContentProperty excelContentProperty) {
         if (value == null) {
-            return new CellData();
+            return new CellData(CellDataTypeEnum.EMPTY);
         }
         if (value instanceof String && currentWriteHolder.globalConfiguration().getAutoTrim()) {
             value = ((String)value).trim();
@@ -40,6 +40,9 @@ public abstract class AbstractExcelWriteExecutor implements ExcelWriteExecutor {
         if (cellData.getFormula() != null && cellData.getFormula()) {
             cell.setCellFormula(cellData.getFormulaValue());
         }
+        if (cellData.getType() == null) {
+            cellData.setType(CellDataTypeEnum.EMPTY);
+        }
         switch (cellData.getType()) {
             case STRING:
                 cell.setCellValue(cellData.getStringValue());
@@ -64,7 +67,7 @@ public abstract class AbstractExcelWriteExecutor implements ExcelWriteExecutor {
     protected CellData convert(WriteHolder currentWriteHolder, Class clazz, Cell cell, Object value,
         ExcelContentProperty excelContentProperty) {
         if (value == null) {
-            return new CellData();
+            return new CellData(CellDataTypeEnum.EMPTY);
         }
         // This means that the user has defined the data.
         if (value instanceof CellData) {

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

@@ -14,6 +14,7 @@ import org.apache.poi.ss.usermodel.Row;
 import org.apache.poi.ss.usermodel.Sheet;
 
 import com.alibaba.excel.context.WriteContext;
+import com.alibaba.excel.enums.CellDataTypeEnum;
 import com.alibaba.excel.enums.WriteDirectionEnum;
 import com.alibaba.excel.enums.WriteTemplateAnalysisCellTypeEnum;
 import com.alibaba.excel.exception.ExcelGenerateException;
@@ -168,7 +169,9 @@ public class ExcelWriteFillExecutor extends AbstractExcelWriteExecutor {
                     CellData cellData = convert(writeSheetHolder, value == null ? null : value.getClass(), cell, value,
                         fieldNameContentPropertyMap.get(variable));
                     cellDataList.add(cellData);
-                    switch (cellData.getType()) {
+                    CellDataTypeEnum type = cellData.getType();
+                    if (type != null) {
+                        switch (type) {
                             case STRING:
                                 cellValueBuild.append(cellData.getStringValue());
                                 break;
@@ -182,6 +185,7 @@ public class ExcelWriteFillExecutor extends AbstractExcelWriteExecutor {
                                 break;
                         }
                     }
+                }
                 cellValueBuild.append(analysisCell.getPrepareDataList().get(index));
                 cell.setCellValue(cellValueBuild.toString());
                 WriteHandlerUtils.afterCellDispose(writeContext, cellDataList, cell, null, null, Boolean.FALSE);

src/main/java/com/alibaba/excel/write/style/column/LongestMatchColumnWidthStyleStrategy.java

@@ -6,6 +6,7 @@ import java.util.Map;
 
 import org.apache.poi.ss.usermodel.Cell;
 
+import com.alibaba.excel.enums.CellDataTypeEnum;
 import com.alibaba.excel.metadata.CellData;
 import com.alibaba.excel.metadata.Head;
 import com.alibaba.excel.util.CollectionUtils;
@@ -56,7 +57,11 @@ public class LongestMatchColumnWidthStyleStrategy extends AbstractColumnWidthSty
             return cell.getStringCellValue().getBytes().length;
         }
         CellData cellData = cellDataList.get(0);
-        switch (cellData.getType()) {
+        CellDataTypeEnum type = cellData.getType();
+        if (type == null) {
+            return -1;
+        }
+        switch (type) {
             case STRING:
                 return cellData.getStringValue().getBytes().length;
             case BOOLEAN:

src/test/java/com/alibaba/easyexcel/test/temp/simple/Wirte.java

@@ -1,7 +1,5 @@
 package com.alibaba.easyexcel.test.temp.simple;
 
-import java.io.FileInputStream;
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
@@ -13,14 +11,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import com.alibaba.easyexcel.test.core.large.LargeData;
-import com.alibaba.easyexcel.test.core.simple.SimpleData;
 import com.alibaba.easyexcel.test.demo.write.DemoData;
 import com.alibaba.easyexcel.test.util.TestFileUtil;
 import com.alibaba.excel.EasyExcel;
-import com.alibaba.excel.ExcelWriter;
-import com.alibaba.excel.write.metadata.WriteSheet;
-import com.alibaba.excel.write.style.row.SimpleRowHeightStyleStrategy;
-import com.alibaba.fastjson.JSON;
 
 import net.sf.cglib.beans.BeanMap;
 
@@ -50,8 +43,7 @@ public class Wirte {
         String fileName = TestFileUtil.getPath() + "t22" + System.currentTimeMillis() + ".xlsx";
         // 这里 需要指定写用哪个class去读，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, DemoData.class)
+        EasyExcel.write(fileName, DemoData.class).sheet("模板").doWrite(data());
-            .registerWriteHandler(new SimpleRowHeightStyleStrategy((short)150, (short)120)).sheet("模板").doWrite(data());
     }
 
     private List<List<String>> head() {
@@ -74,7 +66,7 @@ public class Wirte {
             DemoData data = new DemoData();
             data.setString("字符串" + i);
             data.setDate(new Date());
-            data.setDoubleData(0.56);
+            data.setDoubleData(null);
             list.add(data);
         }
         return list;

update.md

@@ -1,3 +1,8 @@
+# 2.1.0-beta4
+* 修改最长匹配策略会空指针的bug [Issue #747](https://github.com/alibaba/easyexcel/issues/747)
+* 修改afterRowDispose错误 [Issue #751](https://github.com/alibaba/easyexcel/issues/751)
+* 修复多个头的情况下会读取数据为空
+
 # 2.1.0-beta3
 * 支持强行指定在内存处理，以支持备注、RichTextString等的写入
 * 修复关闭流失败，可能会不删除临时文件的问题