java合并PDF

1.import java.io.FileOutputStream; 
2.import java.io.IOException; 
3.import com.lowagie.text.Document; 
4.import com.lowagie.text.DocumentException; 
5.import com.lowagie.text.pdf.PdfCopy; 
6.import com.lowagie.text.pdf.PdfImportedPage; 
7.import com.lowagie.text.pdf.PdfReader; 
8. 
9.public class MergeFile { 
10.    public static void main(String[] args) { 
11.        String[] files = { "e:\\1.pdf", "e:\\2.pdf", "e:\\3.pdf" }; 
12.        String savepath = "e:\\temp.pdf"; 
13.        mergePdfFiles(files, savepath); 
14.    } /*
15.         * * 合並pdf文件 * * @param files 要合並文件數組(絕對路徑如{ "e:\\1.pdf", "e:\\2.pdf" ,
16.         * "e:\\3.pdf"}) * @param newfile
17.         * 合並後新產生的文件絕對路徑如e:\\temp.pdf,請自己刪除用過後不再用的文件請 * @return boolean
18.         * 產生成功返回true, 否則返回false
19.         */ 
20. 
21.    public static boolean mergePdfFiles(String[] files, String newfile) { 
22.        boolean retValue = false; 
23.        Document document = null; 
24.        try { 
25.            document = new Document(new PdfReader(files[0]).getPageSize(1)); 
26.            PdfCopy copy = new PdfCopy(document, new FileOutputStream(newfile)); 
27.            document.open(); 
28.            for (int i = 0; i < files.length; i++) { 
29.                PdfReader reader = new PdfReader(files[i]); 
30.                int n = reader.getNumberOfPages(); 
31.                for (int j = 1; j <= n; j++) { 
32.                    document.newPage(); 
33.                    PdfImportedPage page = copy.getImportedPage(reader, j); 
34.                    copy.addPage(page); 
35.                } 
36.            } 
37.            retValue = true; 
38.        } catch (Exception e) { 
39.            e.printStackTrace(); 
40.        } finally { 
41.            document.close(); 
42.        } 
43.        return retValue; 
44.    } 
45.}