Java实现合并多个PDF的示例代码

这里合并用到了一个itext的包。使用maven直接导入依赖即可。

<dependency>    <groupid>com.lowagie</groupid>    <artifactid>itext</artifactid>    <version>2.1.7</version></dependency>

这个是我写的一个utl工具类，里面还写了一个main方法，如果你有两个pdf，可以直接用main方法跑一下。

import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {    /**     * 合并pdf     * @param files 需要合并的pdf路径     * @param newfile 合并成新的文件的路径     * @return     */    public static boolean mergepdffiles(string[] files, string newfile) {        boolean retvalue = fal;        document document = null;        pdfcopy copy = null;        pdfreader reader = null;        try {            document = new document(new pdfreader(files[0]).getpagesize(1));            copy = new pdfcopy(document, new fileoutputstream(newfile));            document.open();            for (int i = 0; i < files.length; i++) {                reader = new pdfreader(files[i]);                int n = reader.getnumberofpages();                for (int j = 1; j <= n; j++) {                    document.newpage();                    pdfimportedpage page = copy.getimportedpage(reader, j);                    copy.addpage(page);                }            }            retvalue = true;        } catch (exception e) {            e.printstacktrace();        } finally {            if (reader != null) {                reader.clo();            }            if (copy != null) {                copy.clo();            }            if (document != null) {                document.clo();            }        }        return retvalue;    }    public static void main(string[] args) {        string[] files = { "d:\\ca\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
00001\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
001\\abistatistic.pdf", "d:\\ca\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
00001\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
001\\abitable.pdf",                "d:\\ca\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document docu建行金卡有什么用ment = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} sin60度等于多少啊catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
00001\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b初刻拍案惊奇读后感 = mergepdffiles(files, savepath);system.out.println(b);}}
001\\cvrr.pdf" };        string savepath = "d:\\ca\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.get四书五经是什么importedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if 杞人忧天文言文(reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
00001\
import com.lowagie.text.document;import com.lowagie.text.pdf.pdfcopy;import com.lowagie.text.pdf.pdfimportedpage;import com.lowagie.text.pdf.pdfreader;import java.io.fileoutputstream;public class pdfutil {/*** 合并pdf* @param files 需要合并的pdf路径* @param newfile 合并成新的文件的路径* @return*/public static boolean mergepdffiles(string[] files, string newfile) {boolean retvalue = fal;document document = null;pdfcopy copy = null;pdfreader reader = null;try {document = new document(new pdfreader(files[0]).getpagesize(1));copy = new pdfcopy(document, new fileoutputstream(newfile));document.open();for (int i = 0; i < files.length; i++) {reader = new pdfreader(files[i]);int n = reader.getnumberofpages();for (int j = 1; j <= n; j++) {document.newpage();pdfimportedpage page = copy.getimportedpage(reader, j);copy.addpage(page);}}retvalue = true;} catch (exception e) {e.printstacktrace();} finally {if (reader != null) {reader.clo();}if (copy != null) {copy.clo();}if (document != null) {document.clo();}}return retvalue;}public static void main(string[] args) {string[] files = { "d:\\ca\\0000001\\00001\\abistatistic.pdf", "d:\\ca\\0000001\\00001\\abitable.pdf","d:\\ca\\0000001\\00001\\cvrr.pdf" };string savepath = "d:\\ca\\0000001\\00001\\temp.pdf";boolean b = mergepdffiles(files, savepath);system.out.println(b);}}
001\\temp.pdf";        boolean b = mergepdffiles(files, savepath);        system.out.println(b);    }}

补充

通过java还能实现pdf的拆分

1.按每页单独拆分

import com.spire.pdf.*;public class splitpdf1 {public static void main(string[] args){//加载需要拆分的pdf文档  pdfdocument doc = new pdfdocument();  doc.loadfromfile("test.pdf");  //调用方法split()将pdf文档按每一页拆分为单独的文档  doc.split("output/splitdocument-{0}.pdf", 0);  doc.clo();}}

2.按指定页数范围拆分

import com.spire.pdf.*; import com.spire.pdf.graphics.pdfmargins;  import java.awt.geom.point2d;  public class splitpdf2 {   public static void main(string[] args)   {      //加载需要拆分的pdf文档     pdfdocument doc = new pdfdocument();     doc.loadfromfile("test.pdf");      //新建第1个pdf文档1     pdfdocument newpdf1 = new pdfdocument();     pdfpageba page;      //将原pdf文档的第1、2页拆分，并保存到newpdf1     for(int i = 0;i<2;i++)     {       page = newpdf1.getpages().add(doc.getpages().get(i).getsize(), new pdfmargins(0));       doc.getpages().get(i).createtemplate().draw(page, new point2d.float(0,0));     }     newpdf1.savetofile("split/result1.pdf");      //新建第2个pdf文档     pdfdocument newpdf2 = new pdfdocument();      //将原pdf文档的第3、4页拆分，并保存到newpdf2     for(int i = 2;i<4;i++)     {       page = newpdf2.getpages().add(doc.getpages().get(i).getsize(), new pdfmargins(0));       doc.getpages().get(i).createtemplate().draw(page, new point2d.float(0,0));     }     newpdf2.savetofile("split/result2.pdf");   } } 

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