我正在使用PDF渲染来阅读和更新PDF。我想在那个PDF中添加书签并使用相同的API更新它。有可能这样做与PDF渲染?下面是一些代码片段，用于更新PDF中不工作的书签
File file = new File("C:\test.pdf");
RandomAccessFile raf = new RandomAccessFile(file, "rw");
FileChannel channel = raf.getChannel();
ByteBuffer buf = channel.map(FileChannel.MapMode.READ_WRITE, 0, channel.size());
PDFFile pdffile = new PDFFile(buf);
OutlineNode rootNode = new OutlineNode("New Bookmark");
PDFPage page = pdffile.getPage(0);
OutlineNode node = pdffile.getOutline();
OutlineNode node2 = (OutlineNode)node.getNextNode();
node2.add(rootNode);
我在上面的例子中使用PDFRenderer-0.9.0.jar lib。如果有人做过PDF Renderer，请推荐我。
您可以使用这个添加书签。有关完整代码和实现，请点击链接。
如果你以后想要访问书签，可以使用follow the link。
import pdftron.Common.PDFNetException;
import pdftron.PDF.*;
import pdftron.SDF.Obj;
import pdftron.SDF.SDFDoc;
public class BookmarkTest {
public static void main(String[] args)
{
PDFNet.initialize();
// Relative path to the folder containing test files.
String input_path = "../../TestFiles/";
String output_path = "../../TestFiles/Output/";
// The following example illustrates how to create and edit the outline tree
// using high-level Bookmark methods.
try
{
PDFDoc doc=new PDFDoc((input_path + "numbered.pdf"));
doc.initSecurityHandler();
// Lets first create the root bookmark items.
Bookmark red = Bookmark.create(doc, "Red");
Bookmark green = Bookmark.create(doc, "Green");
Bookmark blue = Bookmark.create(doc, "Blue");
doc.addRootBookmark(red);
doc.addRootBookmark(green);
doc.addRootBookmark(blue);
// You can also add new root bookmarks using Bookmark.AddNext("...")
blue.addNext("foo");
blue.addNext("bar");
// We can now associate new bookmarks with page destinations:
// The following example creates an 'explicit' destination (see
// section '8.2.1 Destinations' in PDF Reference for more details)
Destination red_dest = Destination.createFit((Page)(doc.getPageIterator().next()));
red.setAction(Action.createGoto(red_dest));
// Create an explicit destination to the first green page in the document
green.setAction(Action.createGoto(
Destination.createFit((Page)(doc.getPage(10))) ));
// The following example creates a 'named' destination (see
// section '8.2.1 Destinations' in PDF Reference for more details)
// Named destinations have certain advantages over explicit destinations.
byte[] key={'b','l','u','e','1'};
Action blue_action = Action.createGoto(key,
Destination.createFit((Page)(doc.getPage(19))) );
blue.setAction(blue_action);
// We can now add children Bookmarks
Bookmark sub_red1 = red.addChild("Red - Page 1");
sub_red1.setAction(Action.createGoto(Destination.createFit((Page)(doc.getPage(1)))));
Bookmark sub_red2 = red.addChild("Red - Page 2");
sub_red2.setAction(Action.createGoto(Destination.createFit((Page)(doc.getPage(2)))));
Bookmark sub_red3 = red.addChild("Red - Page 3");
sub_red3.setAction(Action.createGoto(Destination.createFit((Page)(doc.getPage(3)))));
Bookmark sub_red4 = sub_red3.addChild("Red - Page 4");
sub_red4.setAction(Action.createGoto(Destination.createFit((Page)(doc.getPage(4)))));
Bookmark sub_red5 = sub_red3.addChild("Red - Page 5");
sub_red5.setAction(Action.createGoto(Destination.createFit((Page)(doc.getPage(5)))));
Bookmark sub_red6 = sub_red3.addChild("Red - Page 6");
sub_red6.setAction(Action.createGoto(Destination.createFit((Page)(doc.getPage(6)))));
// Example of how to find and delete a bookmark by title text.
Bookmark foo = doc.getFirstBookmark().find("foo");
if (foo.isValid())
{
foo.delete();
}
else
{
throw new Exception("Foo is not Valid");
}
Bookmark bar = doc.getFirstBookmark().find("bar");
if (bar.isValid())
{
bar.delete();
}
else
{
throw new Exception("Bar is not Valid");
}
// Adding color to Bookmarks. Color and other formatting can help readers
// get around more easily in large PDF documents.
red.setColor(1, 0, 0);
green.setColor(0, 1, 0);
green.setFlags(2); // set bold font
blue.setColor(0, 0, 1);
blue.setFlags(3); // set bold and itallic
doc.save((output_path + "bookmark.pdf"), 0, null);
doc.close();
}
catch(Exception e)
{
System.out.println(e);
}
// The following example illustrates how to traverse the outline tree using
// Bookmark navigation methods: Bookmark.GetNext(), Bookmark.GetPrev(),
// Bookmark.GetFirstChild () and Bookmark.GetLastChild ().
try
{
// Open the document that was saved in the previous code sample
PDFDoc doc=new PDFDoc((output_path + "bookmark.pdf"));
doc.initSecurityHandler();
Bookmark root = doc.getFirstBookmark();
PrintOutlineTree(root);
doc.close();
System.out.println("Done.");
}
catch(Exception e)
{
System.out.println(e);
}
// The following example illustrates how to create a Bookmark to a page
// in a remote document. A remote go-to action is similar to an ordinary
// go-to action, but jumps to a destination in another PDF file instead
// of the current file. See Section 8.5.3 'Remote Go-To Actions' in PDF
// Reference Manual for details.
try
{
// Open the document that was saved in the previous code sample
PDFDoc doc=new PDFDoc((output_path + "bookmark.pdf"));
doc.initSecurityHandler();
// Create file specification (the file reffered to by the remote bookmark)
Obj file_spec = doc.createIndirectDict();
file_spec.putName("Type", "Filespec");
file_spec.putString("F", "bookmark.pdf");
FileSpec spec=new FileSpec(file_spec);
Action goto_remote = Action.createGotoRemote(spec, 5, true);
Bookmark remoteBookmark1 = Bookmark.create(doc, "REMOTE BOOKMARK 1");
remoteBookmark1.setAction(goto_remote);
doc.addRootBookmark(remoteBookmark1);
// Create another remote bootmark, but this time using the low-level SDF/Cos API.
// Create a remote action
Bookmark remoteBookmark2 = Bookmark.create(doc, "REMOTE BOOKMARK 2");
doc.addRootBookmark(remoteBookmark2);
Obj gotoR = remoteBookmark2.getSDFObj().putDict("A");
{
gotoR.putName("S","GoToR"); // Set action type
gotoR.putBool("NewWindow", true);
// Set the file specification
gotoR.put("F", file_spec);
// jump to the first page. Note that pages are indexed from 0.
Obj dest = gotoR.putArray("D"); // Set the destination
dest.pushBackNumber(9);
dest.pushBackName("Fit");
}
doc.save((output_path + "bookmark_remote.pdf"), SDFDoc.e_linearized, null);
doc.close();
}
catch(Exception e)
{
System.out.println(e);
}
PDFNet.terminate();
}
static void PrintIndent(Bookmark item) throws PDFNetException
{
int ident = item.getIndent() - 1;
for (int i=0; i<ident; ++i) System.out.print( " ");
}
// Prints out the outline tree to the standard output
static void PrintOutlineTree(Bookmark item) throws PDFNetException
{
for (; item.isValid(); item=item.getNext())
{
PrintIndent(item);
System.out.print((item.isOpen() ? "- " : "+ ") + item.getTitle() + " ACTION -> ");
// Print Action
Action action = item.getAction();
if (action.isValid())
{
if (action.getType() == Action.e_GoTo)
{
Destination dest = action.getDest();
if (dest.isValid())
{
Page page = dest.getPage();
System.out.println("GoTo Page #" + page.getIndex());
}
}
else
{
System.out.println("Not a 'GoTo' action");
}
}
else
{
System.out.println("NULL");
}
if (item.hasChildren()) // Recursively print children sub-trees
{
PrintOutlineTree(item.getFirstChild());
}
}
}
}