完成2个测试案例

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

@@ -728,8 +728,12 @@ public class CsvSheet implements Sheet, Closeable {
         try {
             for (CsvRow row : rowCache) {
                 Iterator<Cell> cellIterator = row.cellIterator();
+                int columnIndex = 0;
                 while (cellIterator.hasNext()) {
                     CsvCell csvCell = (CsvCell)cellIterator.next();
+                    while (csvCell.getColumnIndex() > columnIndex++) {
+                        csvPrinter.print(null);
+                    }
                     csvPrinter.print(buildCellValue(csvCell));
                 }
                 csvPrinter.println();

src/test/java/com/alibaba/easyexcel/test/core/annotation/AnnotationDataTest.java

@@ -24,7 +24,7 @@ public class AnnotationDataTest {
     public static void init() {
         file07 = TestFileUtil.createNewFile("annotation07.xlsx");
         file03 = TestFileUtil.createNewFile("annotation03.xls");
-        fileCsv = TestFileUtil.createNewFile("annotation.csv");
+        fileCsv = TestFileUtil.createNewFile("annotationCsv.csv");
     }
 
     @Test
@@ -38,8 +38,8 @@ public class AnnotationDataTest {
     }
 
     @Test
-    public void t02ReadAndWriteCsv() throws Exception {
+    public void t03ReadAndWriteCsv() throws Exception {
-        //readAndWrite(fileCsv);
+        readAndWrite(fileCsv);
     }
 
     private void readAndWrite(File file) throws Exception {

src/test/java/com/alibaba/easyexcel/test/core/annotation/AnnotationIndexAndNameDataTest.java

@@ -4,12 +4,12 @@ import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.junit.BeforeClass;
-import org.junit.Test;
-
 import com.alibaba.easyexcel.test.util.TestFileUtil;
 import com.alibaba.excel.EasyExcel;
 
+import org.junit.BeforeClass;
+import org.junit.Test;
+
 /**
  * Annotation data test
  *
@@ -19,11 +19,13 @@ public class AnnotationIndexAndNameDataTest {
 
     private static File file07;
     private static File file03;
+    private static File fileCsv;
 
     @BeforeClass
     public static void init() {
         file07 = TestFileUtil.createNewFile("annotationIndexAndName07.xlsx");
         file03 = TestFileUtil.createNewFile("annotationIndexAndName03.xls");
+        fileCsv = TestFileUtil.createNewFile("annotationIndexAndNameCsv.csv");
     }
 
     @Test
@@ -36,6 +38,11 @@ public class AnnotationIndexAndNameDataTest {
         readAndWrite(file03);
     }
 
+    @Test
+    public void t03ReadAndWrite03() {
+        readAndWrite(fileCsv);
+    }
+
     private void readAndWrite(File file) {
         EasyExcel.write(file, AnnotationIndexAndNameData.class).sheet().doWrite(data());
         EasyExcel.read(file, AnnotationIndexAndNameData.class, new AnnotationIndexAndNameDataListener()).sheet()