import java.io.File;

import com.aspose.words.Document;

import com.aspose.words.ImportFormatMode;

public class DocMerge {

    public static void main(String[] args) throws Exception {

        Document docAll=new Document("e:/a.doc");

        String tmp_path="e:/b.doc";

        File file=new File(tmp_path);

        if(!file.exists())

            return;

        Document doc=new Document(tmp_path);

        docAll.appendDocument(doc, ImportFormatMode.USE_DESTINATION_STYLES);

        String targetPath = "e:/ab.doc";

        docAll.save(targetPath);

    }