diff --git a/src/main/java/com/alibaba/excel/analysis/v07/XlsxRowHandler.java b/src/main/java/com/alibaba/excel/analysis/v07/XlsxRowHandler.java
index abc309d..2431e9a 100644
--- a/src/main/java/com/alibaba/excel/analysis/v07/XlsxRowHandler.java
+++ b/src/main/java/com/alibaba/excel/analysis/v07/XlsxRowHandler.java
@@ -19,7 +19,6 @@ import static com.alibaba.excel.constant.ExcelXmlConstants.*;
 /**
  *
  * @author jipengfei
- * @date 2017/08/23
  */
 public class XlsxRowHandler extends DefaultHandler {
 
diff --git a/src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java b/src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java
index 0579a0a..34f2480 100644
--- a/src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java
+++ b/src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java
@@ -26,7 +26,6 @@ import java.util.List;
 /**
  *
  * @author jipengfei
- * @date 2017/08/27
  */
 public class XlsxSaxAnalyser extends BaseSaxAnalyser {
 
diff --git a/src/main/java/com/alibaba/excel/annotation/ExcelColumnNum.java b/src/main/java/com/alibaba/excel/annotation/ExcelColumnNum.java
index d682830..eb56fe3 100644
--- a/src/main/java/com/alibaba/excel/annotation/ExcelColumnNum.java
+++ b/src/main/java/com/alibaba/excel/annotation/ExcelColumnNum.java
@@ -11,7 +11,6 @@ import java.lang.annotation.Target;
  * Field column num at excel head
  *
  * @author jipengfei
- * @date 2017/03/19
  */
 @Target(ElementType.FIELD)
 @Retention(RetentionPolicy.RUNTIME)
diff --git a/src/main/java/com/alibaba/excel/annotation/FieldType.java b/src/main/java/com/alibaba/excel/annotation/FieldType.java
index e5dc48d..7372995 100644
--- a/src/main/java/com/alibaba/excel/annotation/FieldType.java
+++ b/src/main/java/com/alibaba/excel/annotation/FieldType.java
@@ -3,7 +3,6 @@ package com.alibaba.excel.annotation;
 /**
  *
  * @author jipengfei
- * @date 2017/03/15
  */
 public enum FieldType {
 
diff --git a/src/main/java/com/alibaba/excel/constant/ExcelXmlConstants.java b/src/main/java/com/alibaba/excel/constant/ExcelXmlConstants.java
index 8403f9e..dcd2d5a 100644
--- a/src/main/java/com/alibaba/excel/constant/ExcelXmlConstants.java
+++ b/src/main/java/com/alibaba/excel/constant/ExcelXmlConstants.java
@@ -2,7 +2,6 @@ package com.alibaba.excel.constant;
 
 /**
  * @author jipengfei
- * @date 2017/08/24
  */
 public class ExcelXmlConstants {
     public static final String DIMENSION = "dimension";
diff --git a/src/main/java/com/alibaba/excel/event/OneRowAnalysisFinishEvent.java b/src/main/java/com/alibaba/excel/event/OneRowAnalysisFinishEvent.java
index 9cdc87f..048e9d6 100644
--- a/src/main/java/com/alibaba/excel/event/OneRowAnalysisFinishEvent.java
+++ b/src/main/java/com/alibaba/excel/event/OneRowAnalysisFinishEvent.java
@@ -5,7 +5,6 @@ import java.util.List;
 
 /**
  * @author jipengfei
- * @date 2017/07/21
  */
 public class OneRowAnalysisFinishEvent {
 
diff --git a/src/main/java/com/alibaba/excel/metadata/CellRange.java b/src/main/java/com/alibaba/excel/metadata/CellRange.java
index 7fac539..6805526 100644
--- a/src/main/java/com/alibaba/excel/metadata/CellRange.java
+++ b/src/main/java/com/alibaba/excel/metadata/CellRange.java
@@ -2,7 +2,6 @@ package com.alibaba.excel.metadata;
 
 /**
  * @author jipengfei
- * @date 2017/06/02
  */
 public class CellRange {
 
diff --git a/src/main/java/com/alibaba/excel/metadata/ExcelColumnProperty.java b/src/main/java/com/alibaba/excel/metadata/ExcelColumnProperty.java
index 8b3ed71..cc6442f 100644
--- a/src/main/java/com/alibaba/excel/metadata/ExcelColumnProperty.java
+++ b/src/main/java/com/alibaba/excel/metadata/ExcelColumnProperty.java
@@ -6,7 +6,6 @@ import java.util.List;
 
 /**
  * @author jipengfei
- * @date 2017/05/31
  */
 public class ExcelColumnProperty implements Comparable<ExcelColumnProperty> {
 
diff --git a/src/main/java/com/alibaba/excel/metadata/ExcelHeadProperty.java b/src/main/java/com/alibaba/excel/metadata/ExcelHeadProperty.java
index 628039f..0c77327 100644
--- a/src/main/java/com/alibaba/excel/metadata/ExcelHeadProperty.java
+++ b/src/main/java/com/alibaba/excel/metadata/ExcelHeadProperty.java
@@ -11,7 +11,6 @@ import java.util.*;
  * Define the header attribute of excel
  *
  * @author jipengfei
- * @date 2017/05/31
  */
 public class ExcelHeadProperty {
 
diff --git a/src/main/java/com/alibaba/excel/metadata/Font.java b/src/main/java/com/alibaba/excel/metadata/Font.java
index 3eea50b..4533011 100644
--- a/src/main/java/com/alibaba/excel/metadata/Font.java
+++ b/src/main/java/com/alibaba/excel/metadata/Font.java
@@ -3,7 +3,6 @@ package com.alibaba.excel.metadata;
 /**
  *
  * @author jipengfei
- * @date 2017/05/24
  */
 public class Font {
 
diff --git a/src/main/java/com/alibaba/excel/metadata/Table.java b/src/main/java/com/alibaba/excel/metadata/Table.java
index ac9400a..6643c46 100644
--- a/src/main/java/com/alibaba/excel/metadata/Table.java
+++ b/src/main/java/com/alibaba/excel/metadata/Table.java
@@ -4,7 +4,6 @@ import java.util.List;
 
 /**
  * @author jipengfei
- * @date 2017/05/16
  */
 public class Table {
     /**
diff --git a/src/main/java/com/alibaba/excel/metadata/TableStyle.java b/src/main/java/com/alibaba/excel/metadata/TableStyle.java
index 6618197..228019c 100644
--- a/src/main/java/com/alibaba/excel/metadata/TableStyle.java
+++ b/src/main/java/com/alibaba/excel/metadata/TableStyle.java
@@ -4,7 +4,6 @@ import org.apache.poi.ss.usermodel.IndexedColors;
 
 /**
  * @author jipengfei
- * @date 2017/05/24
  */
 public class TableStyle {
 
diff --git a/src/main/java/com/alibaba/excel/parameter/ExcelWriteParam.java b/src/main/java/com/alibaba/excel/parameter/ExcelWriteParam.java
index 9f5a57f..9104e83 100644
--- a/src/main/java/com/alibaba/excel/parameter/ExcelWriteParam.java
+++ b/src/main/java/com/alibaba/excel/parameter/ExcelWriteParam.java
@@ -8,7 +8,6 @@ import com.alibaba.excel.support.ExcelTypeEnum;
  * {@link com.alibaba.excel.ExcelWriter}
  *
  * @author jipengfei
- * @date 2017/05/15
  */
 @Deprecated
 public class ExcelWriteParam {
diff --git a/src/main/java/com/alibaba/excel/util/IndexValueConverter.java b/src/main/java/com/alibaba/excel/util/IndexValueConverter.java
index af8ac7e..a0c1529 100644
--- a/src/main/java/com/alibaba/excel/util/IndexValueConverter.java
+++ b/src/main/java/com/alibaba/excel/util/IndexValueConverter.java
@@ -9,7 +9,6 @@ import com.alibaba.excel.metadata.IndexValue;
 /**
  * 去除空Cell
  * @author jipengfei
- * @date 2017/04/13
  */
 public class IndexValueConverter {
     public static List<String> converter(List<IndexValue> i_list) {
diff --git a/src/main/java/com/alibaba/excel/util/POITempFile.java b/src/main/java/com/alibaba/excel/util/POITempFile.java
index c342968..6382255 100644
--- a/src/main/java/com/alibaba/excel/util/POITempFile.java
+++ b/src/main/java/com/alibaba/excel/util/POITempFile.java
@@ -5,7 +5,6 @@ import java.io.File;
 /**
  *
  * @author jipengfei
- * @date 2017/06/22
  */
 public class POITempFile {
 
diff --git a/src/main/java/com/alibaba/excel/util/PositionUtils.java b/src/main/java/com/alibaba/excel/util/PositionUtils.java
index f5f084a..37a87dd 100644
--- a/src/main/java/com/alibaba/excel/util/PositionUtils.java
+++ b/src/main/java/com/alibaba/excel/util/PositionUtils.java
@@ -2,7 +2,6 @@ package com.alibaba.excel.util;
 
 /**
  * @author jipengfei
- * @date 2017/08/27
  */
 public class PositionUtils {
 
diff --git a/src/main/java/com/alibaba/excel/util/StyleUtil.java b/src/main/java/com/alibaba/excel/util/StyleUtil.java
index 6fa311c..cfb9c12 100644
--- a/src/main/java/com/alibaba/excel/util/StyleUtil.java
+++ b/src/main/java/com/alibaba/excel/util/StyleUtil.java
@@ -6,7 +6,6 @@ import java.util.Map;
 
 /**
  * @author jipengfei
- * @date 2017/03/15
  */
 public class StyleUtil {
 
diff --git a/src/main/java/com/alibaba/excel/util/TypeUtil.java b/src/main/java/com/alibaba/excel/util/TypeUtil.java
index a04e874..b79d623 100644
--- a/src/main/java/com/alibaba/excel/util/TypeUtil.java
+++ b/src/main/java/com/alibaba/excel/util/TypeUtil.java
@@ -15,7 +15,6 @@ import java.util.regex.Pattern;
 
 /**
  * @author jipengfei
- * @date 2017/03/15
  */
 public class TypeUtil {
 
diff --git a/src/main/java/com/alibaba/excel/write/ExcelBuilderImpl.java b/src/main/java/com/alibaba/excel/write/ExcelBuilderImpl.java
index fd993aa..bb362e9 100644
--- a/src/main/java/com/alibaba/excel/write/ExcelBuilderImpl.java
+++ b/src/main/java/com/alibaba/excel/write/ExcelBuilderImpl.java
@@ -23,7 +23,6 @@ import java.util.List;
 
 /**
  * @author jipengfei
- * @date 2017/05/27
  */
 public class ExcelBuilderImpl implements ExcelBuilder {