Finally, I am able to copy images between Excel file (preserve size and
location), but for some Excel files it prompts data lost during open, I am
still investigating it.
My codes are not well designed, the modification to POI just only serve for
its purpose, it should have a better way to implement.
Really thanks for MSB helps.
--
Copy image function (reuse some MSB contributed codes):
public void copyImages(HSSFSheet sourceSheet, HSSFSheet targetSheet)
{
List lst = sourceSheet.getWorkbook().getAllPictures();
Hashtable<String, HSSFPicture> picTbl = new Hashtable<String,
HSSFPicture>();
findShapeInfo(sourceSheet);
CreationHelper helper =
targetSheet.getWorkbook().getCreationHelper();
HSSFPatriarch drawing = null;
try
{
drawing = targetSheet.getDrawingPatriarch();
}
catch (Exception ex)
{
logger.warn("targetSheet.getDrawingPatriarch()
failed. ", ex);
}
if (drawing == null)
drawing = targetSheet.createDrawingPatriarch();
for (ShapeInfo shape : shapes.values())
{
if (shape.getPictureFilename() == null)
continue;
HSSFPictureData picData = (HSSFPictureData)
lst.get(shape.getPicIndex());
shape.setPictureData(picData);
byte[] data = shape.getPictureData().getData();
HSSFClientAnchor anchor = (HSSFClientAnchor)
helper.createClientAnchor();
anchor.setCol1(shape.getCol1());
anchor.setCol2(shape.getCol2());
anchor.setRow1(shape.getRow1());
anchor.setRow2(shape.getRow2());
anchor.setDx1(shape.getOffsetCol1());
anchor.setDx2(shape.getOffsetCol2());
anchor.setDy1(shape.getOffsetRow1());
anchor.setDy2(shape.getOffsetRow2());
// The pictureIdx is wrong
int pictureIdx =
targetSheet.getWorkbook().addPicture(String.valueOf(anchor.hashCode()),
data, shape.getPictureData().getFormat());
HSSFPicture pic = drawing.createPicture(anchor,
pictureIdx);
picTbl.put(String.valueOf(anchor.hashCode()), pic);
}
int index = 1;
lst = targetSheet.getWorkbook().getAllPictures();
for (int i = 0; i < lst.size(); i++)
{
index++;
HSSFPictureData picData = (HSSFPictureData)
lst.get(i);
if (picData.getCustomId() == null)
continue;
HSSFPicture pic = picTbl.get(picData.getCustomId());
if (pic == null)
continue;
pic.setPictureIndex(index);
}
}
private void findShapeInfo(HSSFSheet sheet)
{
try
{
EscherAggregate escherAggregate =
sheet.getDrawingEscherAggregate();
if (escherAggregate != null)
{
EscherContainerRecord escherContainer =
escherAggregate.getEscherContainer();
iterateContainer(escherContainer, 1);
}
}
catch (Exception ex)
{
logger.error(ex, ex);
}
}
private void iterateContainer(EscherContainerRecord
escherContainer, int
level)
{
if (escherContainer == null)
return;
List childRecords = escherContainer.getChildRecords();
Iterator listIterator = null;
org.apache.poi.ddf.EscherSpgrRecord sprgRecord = null;
org.apache.poi.ddf.EscherSpRecord spRecord = null;
org.apache.poi.ddf.EscherOptRecord optRecord = null;
org.apache.poi.ddf.EscherClientAnchorRecord anchrRecord
= null;
org.apache.poi.ddf.EscherClientDataRecord dataRecord =
null;
org.apache.poi.ddf.EscherDgRecord dgRecord = null;
Object next = null;
listIterator = childRecords.iterator();
while (listIterator.hasNext())
{
next = listIterator.next();
// logger.debug("next: " + next);
if (next instanceof
org.apache.poi.ddf.EscherContainerRecord)
iterateContainer((org.apache.poi.ddf.EscherContainerRecord) next,
++level);
else if (next instanceof
org.apache.poi.ddf.EscherSpgrRecord)
sprgRecord =
(org.apache.poi.ddf.EscherSpgrRecord) next;
else if (next instanceof
org.apache.poi.ddf.EscherSpRecord)
spRecord =
(org.apache.poi.ddf.EscherSpRecord) next;
else if (next instanceof
org.apache.poi.ddf.EscherOptRecord)
{
optRecord =
(org.apache.poi.ddf.EscherOptRecord) next;
String key = String.valueOf(level);
if (shapes.containsKey(key))
shapes.get(key).setOptRecord(optRecord);
else
{
ShapeInfo shape = new
ShapeInfo(level);
shape.setOptRecord(optRecord);
shapes.put(key, shape);
}
}
else if (next instanceof
org.apache.poi.ddf.EscherClientAnchorRecord)
{
anchrRecord =
(org.apache.poi.ddf.EscherClientAnchorRecord) next;
String key = String.valueOf(level);
if (shapes.containsKey(key))
shapes.get(key).setAnchorRecord(anchrRecord);
else
{
ShapeInfo shape = new
ShapeInfo(level);
shape.setAnchorRecord(anchrRecord);
shapes.put(key, shape);
}
}
else if (next instanceof
org.apache.poi.ddf.EscherClientDataRecord)
dataRecord =
(org.apache.poi.ddf.EscherClientDataRecord) next;
else if (next instanceof
org.apache.poi.ddf.EscherDgRecord)
dgRecord =
(org.apache.poi.ddf.EscherDgRecord) next;
}
}
--
Modification of POI source codes (add CustomId field in HSSFPictureData to
link with HSSFPicture):
Index: src/java/org/apache/poi/ddf/EscherBitmapBlip.java
===================================================================
--- src/java/org/apache/poi/ddf/EscherBitmapBlip.java (revision 773443)
+++ src/java/org/apache/poi/ddf/EscherBitmapBlip.java (working copy)
@@ -141,5 +141,17 @@
" Marker: 0x" + HexDump.toHex( field_2_marker ) + nl +
" Extra Data:" + nl + extraData;
}
+
+ private String customId = null;
+ public void setCustomId(String value)
+ {
+ this.customId = value;
+ }
+
+ public String getCustomId()
+ {
+ return this.customId;
+ }
+
}
Index: src/java/org/apache/poi/hssf/model/DrawingManager2.java
===================================================================
--- src/java/org/apache/poi/hssf/model/DrawingManager2.java (revision
773443)
+++ src/java/org/apache/poi/hssf/model/DrawingManager2.java (working
copy)
@@ -122,7 +122,10 @@
EscherDgRecord getDrawingGroup(int drawingGroupId)
{
- return (EscherDgRecord) drawingGroups.get(drawingGroupId-1);
+ if(drawingGroupId > drawingGroups.size())
+ return (EscherDgRecord)
drawingGroups.get(drawingGroups.size() - 1);
+ else
+ return (EscherDgRecord) drawingGroups.get(drawingGroupId-1);
}
boolean drawingGroupExists( short dgId )
Index: src/java/org/apache/poi/hssf/usermodel/HSSFPictureData.java
===================================================================
--- src/java/org/apache/poi/hssf/usermodel/HSSFPictureData.java (revision
773443)
+++ src/java/org/apache/poi/hssf/usermodel/HSSFPictureData.java (working
copy)
@@ -100,5 +100,13 @@
return "";
}
}
+
+ public String getCustomId()
+ {
+ if(blip instanceof EscherBitmapBlip)
+ return ((EscherBitmapBlip)blip).getCustomId();
+ else
+ return null;
+ }
}
Index: src/java/org/apache/poi/hssf/usermodel/HSSFWorkbook.java
===================================================================
--- src/java/org/apache/poi/hssf/usermodel/HSSFWorkbook.java (revision
773443)
+++ src/java/org/apache/poi/hssf/usermodel/HSSFWorkbook.java (working
copy)
@@ -1562,7 +1562,54 @@
return workbook.addBSERecord( r );
}
+
+ public int addPicture(String customId, byte[] pictureData, int format)
+ {
+ byte[] uid = newUID();
+ EscherBitmapBlip blipRecord = new EscherBitmapBlip();
+ blipRecord.setRecordId( (short) ( EscherBitmapBlip.RECORD_ID_START
+ format ) );
+ switch (format)
+ {
+ case PICTURE_TYPE_EMF:
+ blipRecord.setOptions(HSSFPictureData.MSOBI_EMF);
+ break;
+ case PICTURE_TYPE_WMF:
+ blipRecord.setOptions(HSSFPictureData.MSOBI_WMF);
+ break;
+ case PICTURE_TYPE_PICT:
+ blipRecord.setOptions(HSSFPictureData.MSOBI_PICT);
+ break;
+ case PICTURE_TYPE_PNG:
+ blipRecord.setOptions(HSSFPictureData.MSOBI_PNG);
+ break;
+ case HSSFWorkbook.PICTURE_TYPE_JPEG:
+ blipRecord.setOptions(HSSFPictureData.MSOBI_JPEG);
+ break;
+ case HSSFWorkbook.PICTURE_TYPE_DIB:
+ blipRecord.setOptions(HSSFPictureData.MSOBI_DIB);
+ break;
+ }
+ blipRecord.setUID( uid );
+ blipRecord.setMarker( (byte) 0xFF );
+ blipRecord.setPictureData( pictureData );
+ blipRecord.setCustomId(customId);
+
+ EscherBSERecord r = new EscherBSERecord();
+ r.setRecordId( EscherBSERecord.RECORD_ID );
+ r.setOptions( (short) ( 0x0002 | ( format << 4 ) ) );
+ r.setBlipTypeMacOS( (byte) format );
+ r.setBlipTypeWin32( (byte) format );
+ r.setUid( uid );
+ r.setTag( (short) 0xFF );
+ r.setSize( pictureData.length + 25 );
+ r.setRef( 1 );
+ r.setOffset( 0 );
+ r.setBlipRecord( blipRecord );
+
+ return workbook.addBSERecord( r );
+ }
+
/**
* Gets all pictures from the Workbook.
*
--
--
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