* 修复在某些情况下可能出现不必要的`warn`日志

src/main/java/com/alibaba/excel/ExcelReader.java

@@ -274,7 +274,9 @@ public class ExcelReader {
      * Complete the entire read file.Release the cache and close stream.
      */
     public void finish() {
-        excelAnalyser.finish();
+        if (excelAnalyser != null) {
+            excelAnalyser.finish();
+        }
     }
 
     /**

src/main/java/com/alibaba/excel/ExcelWriter.java

@@ -325,7 +325,9 @@ public class ExcelWriter {
      * Close IO
      */
     public void finish() {
-        excelBuilder.finish(false);
+        if (excelBuilder != null) {
+            excelBuilder.finish(false);
+        }
     }
 
     /**

src/test/java/com/alibaba/easyexcel/test/demo/write/CommentWriteHandler.java

@@ -0,0 +1,37 @@
+package com.alibaba.easyexcel.test.demo.write;
+
+import org.apache.poi.ss.usermodel.Comment;
+import org.apache.poi.ss.usermodel.Drawing;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
+import org.apache.poi.xssf.usermodel.XSSFRichTextString;
+
+import com.alibaba.excel.write.handler.AbstractRowWriteHandler;
+import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
+import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
+
+/**
+ * 自定义拦截器.新增注释,第一行头加批注
+ *
+ * @author Jiaju Zhuang
+ */
+public class CommentWriteHandler extends AbstractRowWriteHandler {
+
+    @Override
+    public void afterRowDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row,
+        Integer relativeRowIndex, Boolean isHead) {
+        if (isHead) {
+            Sheet sheet = writeSheetHolder.getSheet();
+            Drawing<?> drawingPatriarch = sheet.createDrawingPatriarch();
+            // 在第一行 第二列创建一个批注
+            Comment comment =
+                drawingPatriarch.createCellComment(new XSSFClientAnchor(0, 0, 0, 0, (short)1, 0, (short)2, 1));
+            // 输入批注信息
+            comment.setString(new XSSFRichTextString("创建批注!"));
+            // 将批注添加到单元格对象中
+            sheet.getRow(0).getCell(1).setCellComment(comment);
+        }
+    }
+
+}

src/test/java/com/alibaba/easyexcel/test/demo/write/WriteTest.java

@@ -439,6 +439,24 @@ public class WriteTest {
             .registerWriteHandler(new CustomCellWriteHandler()).sheet("模板").doWrite(data());
     }
 
+    /**
+     * 插入批注
+     * <p>
+     * 1. 创建excel对应的实体对象 参照{@link DemoData}
+     * <p>
+     * 2. 注册拦截器 {@link CommentWriteHandler}
+     * <p>
+     * 2. 直接写即可
+     */
+    @Test
+    public void commentWrite() {
+        String fileName = TestFileUtil.getPath() + "commentWrite" + System.currentTimeMillis() + ".xlsx";
+        // 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
+        // 这里要注意inMemory 要设置为true，才能支持批注。目前没有好的办法解决 不在内存处理批注。这个需要自己选择。
+        EasyExcel.write(fileName, DemoData.class).inMemory(Boolean.TRUE).registerWriteHandler(new CommentWriteHandler())
+            .sheet("模板").doWrite(data());
+    }
+
     /**
      * 可变标题处理(包括标题国际化等)
      * <p>

update.md

@@ -1,6 +1,7 @@
-# 2.2.0-beta1
+# 2.2.0-beta2
 * 修复最长匹配策略不同表格会有影响的bug [Issue #1010](https://github.com/alibaba/easyexcel/issues/1010)
 * `LinkedList`写入的性能问题 #1121
+* 修复在某些情况下可能出现不必要的`warn`日志
 
 # 2.2.0-beta1
 * 重写主流程，代码更加优雅