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https://issues.apache.org/jira/browse/PDFBOX-5173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17326651#comment-17326651
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Tilman Hausherr edited comment on PDFBOX-5173 at 4/21/21, 4:11 PM:
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That's because your name tree isn't properly sorted, something goes wrong
there. The easiest is to have a HashMap do it for you, here's the modified code
(only beginning and end are modified)
{code}
PDEmbeddedFilesNameTreeNode efTree = new PDEmbeddedFilesNameTreeNode();
Map<String, PDComplexFileSpecification> map = new HashMap<>();
// 创建表格属性
COSDictionary collectionDic = new COSDictionary();
COSDictionary schemaDict = new COSDictionary();
schemaDict.setItem(COSName.TYPE, COSName.COLLECTION_SCHEMA);
COSDictionary sortDic = new COSDictionary();
sortDic.setItem(COSName.TYPE, COSName.COLLECTION_SORT);
sortDic.setString(COSName.A, "true"); // sort ascending
sortDic.setItem(COSName.S, COSName.getPDFName("序号")); // "it identifies
a field described in the parent collection dictionary"
collectionDic.setItem(COSName.TYPE, COSName.COLLECTION);
collectionDic.setItem(COSName.SCHEMA, schemaDict);
collectionDic.setItem(COSName.SORT, sortDic);
collectionDic.setItem(COSName.VIEW, COSName.D); // Details mode
COSDictionary fieldDict1 = new COSDictionary();
fieldDict1.setItem(COSName.TYPE, COSName.COLLECTION_FIELD);
fieldDict1.setItem(COSName.SUBTYPE, COSName.N); // type: number类型 field
fieldDict1.setString(COSName.N, "序号"); // header text
fieldDict1.setInt(COSName.O, 1); // order on the screen
COSDictionary fieldDict2 = new COSDictionary();
fieldDict2.setItem(COSName.TYPE, COSName.COLLECTION_FIELD);
fieldDict2.setItem(COSName.SUBTYPE, COSName.S); // type: text field
fieldDict2.setString(COSName.N, "文件类型");
fieldDict2.setInt(COSName.O, 2);
COSDictionary fieldDict3 = new COSDictionary();
fieldDict3.setItem(COSName.TYPE, COSName.COLLECTION_FIELD);
fieldDict3.setItem(COSName.SUBTYPE, COSName.S); // type: String field
fieldDict3.setString(COSName.N, "文件名称");
fieldDict3.setInt(COSName.O, 3);
schemaDict.setItem("序号", fieldDict1); // field name (this is a key)
schemaDict.setItem("文件类型", fieldDict2);
schemaDict.setItem("文件名称", fieldDict3);
doc.getDocumentCatalog().getCOSObject().setItem(COSName.COLLECTION,
collectionDic);
doc.getDocumentCatalog().setVersion("1.7");
List<PDEmbeddedFilesNameTreeNode> kids = new
ArrayList<PDEmbeddedFilesNameTreeNode>();
int count = 0;
for (String childFile : childFiles) {
count++;
PDComplexFileSpecification fs = new PDComplexFileSpecification();
File attachment = new File(childFile);
PDEmbeddedFile ef = new PDEmbeddedFile(doc, new
FileInputStream(attachment));
COSDictionary ciDict1 = new COSDictionary();
ciDict1.setItem(COSName.TYPE, COSName.COLLECTION_ITEM);
// use the field names from earlier
ciDict1.setInt("序号", count);
ciDict1.setString("文件类型", "filetype");
ciDict1.setString("文件名称",attachment.getName() );
fs.getCOSObject().setItem(COSName.CI, ciDict1);
fs.setFileDescription(attachment.getName().replace(".pdf",""));
//文件描述
fs.setFileUnicode(attachment.getName()); //文件名
ef.setSubtype("application/pdf"); //参考mime文件类型
ef.setSize((int) attachment.length());
Calendar c=Calendar.getInstance();
c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
ef.setCreationDate(c);
ef.setModDate(c);
fs.setEmbeddedFile(ef);
map.put(attachment.getName(), fs);
// PDEmbeddedFilesNameTreeNode treeNode = new
PDEmbeddedFilesNameTreeNode();
// treeNode.setNames(Collections.singletonMap(attachment.getName(),
fs));
// kids.add(treeNode);
}
PDEmbeddedFilesNameTreeNode treeNode = new
PDEmbeddedFilesNameTreeNode();
treeNode.setNames(map);
kids.add(treeNode);
efTree.setKids(kids);
{code}
was (Author: tilman):
That's because your name tree isn't properly sorted, something goes wrong
there. The easiest is to have a TreeMap do it for you, here's the modified code
(only beginning and end are modified)
{code}
PDEmbeddedFilesNameTreeNode efTree = new PDEmbeddedFilesNameTreeNode();
Map<String, PDComplexFileSpecification> map = new TreeMap<>();
// 创建表格属性
COSDictionary collectionDic = new COSDictionary();
COSDictionary schemaDict = new COSDictionary();
schemaDict.setItem(COSName.TYPE, COSName.COLLECTION_SCHEMA);
COSDictionary sortDic = new COSDictionary();
sortDic.setItem(COSName.TYPE, COSName.COLLECTION_SORT);
sortDic.setString(COSName.A, "true"); // sort ascending
sortDic.setItem(COSName.S, COSName.getPDFName("序号")); // "it identifies
a field described in the parent collection dictionary"
collectionDic.setItem(COSName.TYPE, COSName.COLLECTION);
collectionDic.setItem(COSName.SCHEMA, schemaDict);
collectionDic.setItem(COSName.SORT, sortDic);
collectionDic.setItem(COSName.VIEW, COSName.D); // Details mode
COSDictionary fieldDict1 = new COSDictionary();
fieldDict1.setItem(COSName.TYPE, COSName.COLLECTION_FIELD);
fieldDict1.setItem(COSName.SUBTYPE, COSName.N); // type: number类型 field
fieldDict1.setString(COSName.N, "序号"); // header text
fieldDict1.setInt(COSName.O, 1); // order on the screen
COSDictionary fieldDict2 = new COSDictionary();
fieldDict2.setItem(COSName.TYPE, COSName.COLLECTION_FIELD);
fieldDict2.setItem(COSName.SUBTYPE, COSName.S); // type: text field
fieldDict2.setString(COSName.N, "文件类型");
fieldDict2.setInt(COSName.O, 2);
COSDictionary fieldDict3 = new COSDictionary();
fieldDict3.setItem(COSName.TYPE, COSName.COLLECTION_FIELD);
fieldDict3.setItem(COSName.SUBTYPE, COSName.S); // type: String field
fieldDict3.setString(COSName.N, "文件名称");
fieldDict3.setInt(COSName.O, 3);
schemaDict.setItem("序号", fieldDict1); // field name (this is a key)
schemaDict.setItem("文件类型", fieldDict2);
schemaDict.setItem("文件名称", fieldDict3);
doc.getDocumentCatalog().getCOSObject().setItem(COSName.COLLECTION,
collectionDic);
doc.getDocumentCatalog().setVersion("1.7");
List<PDEmbeddedFilesNameTreeNode> kids = new
ArrayList<PDEmbeddedFilesNameTreeNode>();
int count = 0;
for (String childFile : childFiles) {
count++;
PDComplexFileSpecification fs = new PDComplexFileSpecification();
File attachment = new File(childFile);
PDEmbeddedFile ef = new PDEmbeddedFile(doc, new
FileInputStream(attachment));
COSDictionary ciDict1 = new COSDictionary();
ciDict1.setItem(COSName.TYPE, COSName.COLLECTION_ITEM);
// use the field names from earlier
ciDict1.setInt("序号", count);
ciDict1.setString("文件类型", "filetype");
ciDict1.setString("文件名称",attachment.getName() );
fs.getCOSObject().setItem(COSName.CI, ciDict1);
fs.setFileDescription(attachment.getName().replace(".pdf",""));
//文件描述
fs.setFileUnicode(attachment.getName()); //文件名
ef.setSubtype("application/pdf"); //参考mime文件类型
ef.setSize((int) attachment.length());
Calendar c=Calendar.getInstance();
c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
ef.setCreationDate(c);
ef.setModDate(c);
fs.setEmbeddedFile(ef);
map.put(attachment.getName(), fs);
// PDEmbeddedFilesNameTreeNode treeNode = new
PDEmbeddedFilesNameTreeNode();
// treeNode.setNames(Collections.singletonMap(attachment.getName(),
fs));
// kids.add(treeNode);
}
PDEmbeddedFilesNameTreeNode treeNode = new
PDEmbeddedFilesNameTreeNode();
treeNode.setNames(map);
kids.add(treeNode);
efTree.setKids(kids);
{code}
> After Create portable collection PDF package and opening it with Acrobat
> Reader DC, some PDFs in the package will be blank pages after clicking open
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-5173
> URL: https://issues.apache.org/jira/browse/PDFBOX-5173
> Project: PDFBox
> Issue Type: Improvement
> Components: Documentation
> Environment: Java 1.8 pdfbox 2.0.24-snapshot
> Reporter: tanqichao
> Priority: Major
> Attachments: SortAttachments.java, create_reslut.pdf,
> image-2021-04-21-17-44-21-334.png, image-2021-04-21-17-44-46-925.png,
> 卷内目录.pdf, 备考表.pdf, 封面.pdf, 深高顾api.pdf
>
>
>
> !image-2021-04-21-17-44-46-925.png!
>
> !image-2021-04-21-17-44-21-334.png!
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