java操作pdf的工具类itext的处理方法-亚博电竞手机版

目录

• 一、什么是itext？
• 二、引入jar
• 三、itext常用类
• 四、生成pdf步骤
• 五、java操作pdf的工具类itext
• 六、更多的java代码实例

一、什么是itext？

在企业的信息系统中，报表处理一直占比较重要的作用，itext是一种生成pdf报表的java组件。通过在服务器端使用jsp或javabean生成pdf报表，客户端采用超链接显示或下载得到生成的报表，这样就很好的解决了b/s系统的报表处理问题。

二、引入jar

1、项目要使用itext，必须引入jar包

com.itextpdf itextpdf 5.5.6

2、输出中文，还要引入下面itext-asian.jar包

com.itextpdf itext-asian 5.2.0

3、设置pdf文件密码，还要引入下面bcprov-jdk15on.jar包

org.bouncycastle bcprov-jdk15on 1.47

三、itext常用类

• com.itextpdf.text.document：这是itext库中最常用的类，它代表了一个 pdf 实例。如果你需要从零开始生成一个pdf文件，你需要使用这个document类。首先创建该实例，然后打开它，并添加内容，最后关闭该实例，即可生成一个pdf文件。
• com.itextpdf.text.paragraph：表示一个缩进的文本段落，在段落中，你可以设置对齐方式，缩进，段落前后间隔等
• com.itextpdf.text.chapter：表示 pdf 的一个章节，他通过一个paragraph类型的标题和整形章数创建
• com.itextpdf.text.font：这个类包含了所有规范好的字体，包括family of font，大小，样式和颜色，所有这些字体都被声明为静态常量
• com.itextpdf.text.list：表示一个列表；com.itextpdf.text.anchor：表示一个锚，类似于html页面的链接。
• com.itextpdf.text.pdf.pdfwriter：当这个pdfwriter被添加到pdfdocument后，所有添加到document的内容将会写入到与文件或网络关联的输出流中。
• com.itextpdf.text.pdf.pdfreader：用于读取 pdf 文件；

四、生成pdf步骤

1、创建文档

document document = new document();

2、通过书写器将文档写入磁盘

pdfwriter writer = pdfwriter.getinstance(document, new fileoutputstream(file_dir "createpdfwithcolor.pdf"));

3、打开文档

document.open();

4、向文档中添加内容

document.add(new paragraph("i love csdn"));

5、关闭文档

document.close();

五、java操作pdf的工具类itext

package com.neusoft.guor.itext; import java.io.file; import java.io.filenotfoundexception; import java.io.fileoutputstream; import java.io.ioexception; import java.net.malformedurlexception; import java.util.arraylist; import java.util.iterator; import java.util.zip.zipentry; import java.util.zip.zipoutputstream; import com.itextpdf.text.*; import com.itextpdf.text.pdf.basefont; import com.itextpdf.text.pdf.columntext; import com.itextpdf.text.pdf.pdfaction; import com.itextpdf.text.pdf.pdfannotation; import com.itextpdf.text.pdf.pdfcontentbyte; import com.itextpdf.text.pdf.pdfimportedpage; import com.itextpdf.text.pdf.pdfname; import com.itextpdf.text.pdf.pdfoutline; import com.itextpdf.text.pdf.pdfpageeventhelper; import com.itextpdf.text.pdf.pdfreader; import com.itextpdf.text.pdf.pdfstamper; import com.itextpdf.text.pdf.pdfstring; import com.itextpdf.text.pdf.pdftransition; import com.itextpdf.text.pdf.pdfwriter; import com.itextpdf.text.pdf.draw.dottedlineseparator; import com.itextpdf.text.pdf.draw.lineseparator; import com.itextpdf.text.pdf.draw.verticalpositionmark; /** * itext pdf操作 */ public class pdfinit { public static final string file_dir = "e:\\guor\\itext\\"; public static final string const_jpg_java = file_dir "java.jpg"; public static final string const_jpg_nginx = file_dir "nginx.jpg"; private static final string const_nezha = "哪吒编程"; private static final string const_nezha_program = "获取java学习资料请关注公众号：哪吒编程"; private static final string const_bibidong = "比比东"; private static final string const_yunyun = "云韵"; private static final string const_baidu = "百度一下 你就知道"; private static final string const_baidu_url = "https://www.baidu.com"; private static final string const_page_first = "第一页"; private static final string const_page_second = "第二页"; private static final string const_page_third = "第三页"; private static final string const_page_four = "第四页"; private static final string const_page_five = "第五页"; private static final string const_title_first = "一级标题"; private static final string const_title_second = "二级标题"; private static final string const_content = "内容"; // 普通中文字体 public static font static_font_chinese = null; // 超链字体 public static font static_font_link = null; private static void pdffontinit() throws ioexception, documentexception { // 微软雅黑 basefont chinese = basefont.createfont("stsong-light", "unigb-ucs2-h", basefont.not_embedded); // 普通中文字体 static_font_chinese = new font(chinese, 12, font.normal);// font.bold为加粗 // 超链字体 static_font_link = new font(chinese, 12, font.normal, basecolor.blue); } public static document document; public static void main(string[] args) throws exception { pdffontinit(); //createpdf();// 生成一个 pdf 文件 //createpdfwithcolor();// 设置pdf的页面大小和背景颜色 //createpdfwithpassword();// 创建带密码的pdf //createpdfwithnewpages();// 为pdf添加页 //createpdfwithwatermark();// 为pdf文件添加水印，背景图 //createpdfwithcontent();//插入块chunk, 内容phrase, 段落paragraph, list //createpdfwithextracontent();//插入anchor, image, chapter, section //draw();//画图 //createpdfwithalignment();//设置段落 //createpdftodeletepage();//删除 page //insertpage();// 插入 page //splitpdf();//分割 page //mergepdf();// 合并 pdf 文件 //sortpage();// 排序page //setheaderfooter();// 页眉，页脚 //addcolumntext();// 左右文字 //setview();// 文档视图 //pdftozip();// 压缩pdf到zip addannotation();// 注释 /** * 创建一个 pdf 文件，并添加文本 */ public static void createpdf() throws ioexception, documentexception { // 实例化 document document = new document(); // 生成文件 string path = file_dir "createpdf.pdf"; file file = new file(path); if(!file.exists()){ file.createnewfile(); } pdfwriter.getinstance(document, new fileoutputstream(file_dir "createpdf.pdf")); // 打开 document document.open(); // 添加文本 此处无法写入中文 todo document.add(new paragraph(const_nezha)); document.add(new paragraph(const_nezha, static_font_chinese)); // 关闭 document document.close(); * 创建pdf文件，修改文件的属性 public static void createpdfwithcolor() throws filenotfoundexception, documentexception { // 页面大小 rectangle rect = new rectangle(pagesize.a5.rotate()); // 页面背景色 rect.setbackgroundcolor(basecolor.yellow); document = new document(rect); pdfwriter writer = pdfwriter.getinstance(document, new fileoutputstream(file_dir "createpdfwithcolor.pdf")); // pdf版本(默认1.4) writer.setpdfversion(pdfwriter.version_1_6); // 文档属性 document.addauthor(const_nezha); document.addtitle("我的第一个pdf"); // 页边空白 document.setmargins(10, 10, 10, 10); // 打开 // 关闭 * 创建带密码的pdf public static void createpdfwithpassword() throws filenotfoundexception, documentexception { pdfwriter writer = pdfwriter.getinstance(document, new fileoutputstream(file_dir "createpdfwithpassword.pdf")); // userpassword打开密码："123" // ownerpassword编辑密码: "123456" writer.setencryption("123".getbytes(), "123456".getbytes(), pdfwriter.allow_screenreaders, pdfwriter.standard_encryption_128); * 为pdf添加页 public static void createpdfwithnewpages() throws filenotfoundexception, documentexception { pdfwriter writer = pdfwriter.getinstance(document, new fileoutputstream(file_dir "createpdfaddnewpages.pdf")); document.add(new paragraph(const_page_first, static_font_chinese)); document.newpage(); document.add(new paragraph(const_page_second, static_font_chinese)); writer.setpageempty(true); document.add(new paragraph(const_page_third, static_font_chinese)); * 为pdf文件添加水印，背景图 public static void createpdfwithwatermark() throws ioexception, documentexception { fileoutputstream out = new fileoutputstream(file_dir "createpdfwithwatermark.pdf"); pdfwriter.getinstance(document, out); // 图片水印 pdfreader reader = new pdfreader(file_dir "createpdfwithwatermark.pdf"); pdfstamper stamp = new pdfstamper(reader, new fileoutputstream(file_dir "createpdfwithwatermark2.pdf")); image img = image.getinstance(const_jpg_java); img.setabsoluteposition(200, 200); pdfcontentbyte under = stamp.getundercontent(1); under.addimage(img); // 文字水印 pdfcontentbyte over = stamp.getovercontent(2); // 加载字库来完成对字体的创建 basefont bf = basefont.createfont(basefont.helvetica, basefont.winansi, basefont.embedded); over.begintext(); // 设置颜色 默认为蓝色 over.setcolorfill(basecolor.red); // 设置字体字号 over.setfontandsize(bf, 50); // 设置起始位置 over.settextmatrix(30, 30); // 开始写入水印 左-下-倾斜度 over.showtextaligned(element.align_left, "nezha", 245, 400, 30); over.endtext(); // 背景图 image img2 = image.getinstance(const_jpg_nginx); img2.setabsoluteposition(0, 0); pdfcontentbyte under2 = stamp.getundercontent(3); under2.addimage(img2); stamp.close(); reader.close(); * 插入chunk, phrase, paragraph, list * chunk : 块，pdf文档中描述的最小原子元素 * phrase : 短语，chunk的集合 * paragraph : 段落，一个有序的phrase集合 public static void createpdfwithcontent() throws documentexception, filenotfoundexception { fileoutputstream out = new fileoutputstream(file_dir "createpdfwithcontent.pdf"); // 添加块 document.add(new chunk(const_nezha, static_font_chinese)); font font = new font(font.fontfamily.helvetica, 8, font.bold, basecolor.white); chunk id = new chunk("springboot", font); id.setbackground(basecolor.black, 1f, 0.5f, 1f, 1.5f); id.settextrise(7); document.add(id); font font2 = new font(font.fontfamily.helvetica, 6, font.bold, basecolor.white); chunk id2 = new chunk("springcloud", font2); id2.setbackground(basecolor.black, 1f, 0.5f, 1f, 1.5f); id2.settextrise(3); id2.setunderline(0.2f, -2f); document.add(id2); document.add(chunk.newline); // 添加一页，添加短语 document.add(new phrase("phrase page")); // 添加短语 phrase director = new phrase(); chunk name = new chunk(const_bibidong, static_font_chinese); // 添加下划线（thickness:下划线的粗细，yposition:下划线离字的距离） name.setunderline(0.5f, -1f); director.add(name); director.add(new chunk(",")); director.add(new chunk(" ")); director.add(new chunk(const_yunyun, static_font_chinese)); director.setleading(24); document.add(director); // 添加一页 phrase director2 = new phrase(); chunk name2 = new chunk(const_bibidong, static_font_chinese); name2.setunderline(0.2f, -2f); director2.add(name2); director2.add(new chunk(",")); director2.add(new chunk(" ")); director2.add(new chunk(const_yunyun, static_font_chinese)); director2.setleading(24); document.add(director2); // 添加段落 document.add(new paragraph("paragraph page")); paragraph info = new paragraph(); info.add(new chunk(const_nezha)); info.add(new chunk(const_bibidong)); info.add(chunk.newline); info.add(new phrase(const_nezha)); document.add(info); // 通过循环添加段落信息 list list = new list(list.ordered); for (int i = 0; i < 5; i ) { listitem item = new listitem(string.format("%s: %d " const_nezha, const_yunyun (i 1), (i 1) * 100), new font(font.fontfamily.helvetica, 6, font.bold, basecolor.white)); list girllist = new list(list.ordered, list.alphabetical); girllist.setlowercase(list.lowercase); for (int j = 0; j < 3; j ) { listitem girlitem = new listitem("girls" (j 1)); list rolelist = new list(list.unordered); for (int k = 0; k < 2; k ) { rolelist.add(string.format("%s, %s", const_nezha (k 1), const_bibidong (k 1))); } girlitem.add(rolelist); girllist.add(girlitem); } item.add(girllist); list.add(item); document.add(list); * 插入锚anchor, image, 章节chapter, 子列表section public static void createpdfwithextracontent() throws documentexception, malformedurlexception, ioexception { fileoutputstream out = new fileoutputstream(file_dir "createpdfwithextracontent.pdf"); string content = "you can get anything from : "; paragraph paragraph = new paragraph(content); // 创建一个链接到外部网站的新锚点 // 并将此锚点添加到段落中。 anchor anchor = new anchor(const_baidu, stmlayicatic_font_link); anchor.setreference(const_baidu_url); paragraph.add(anchor); document.add(paragraph); // image对象 image img = image.getinstance(const_jpg_nginx); img.setalignment(image.left | image.textwrap); img.setborder(image.box); img.setborderwidth(10); img.setbordercolor(basecolor.white); img.scaleto恰卡编程网fit(800, 50);// 大小 img.setrotationdegrees(-50);// 旋转 document.add(img); // 章节chapter -- 目录 paragraph title = new paragraph(const_title_first,static_font_chinese); // 标题和序号 chapter chapter = new chapter(title, 1); // 子列表section title = new paragraph(const_title_second,static_font_chinese); section section = chapter.addsection(title); section.setbookmarktitle(const_nezha); section.setindentation(10); section.setbookmarkopen(false); section.setnumberstyle(section.numberstyle_dotted_without_final_dot); section subsection1 = section.addsection(new paragraph(const_content,static_font_chinese)); subsection1.setindentationleft(10); subsection1.setnumberdepth(1); document.add(chapter); * 画图 public static void draw() throws exception { fileoutputstream out = new fileoutputstream(file_dir "draw.pdf"); // 左右箭头 document.add(new verticalpositionmark() { public void draw(pdfcontentbyte canvas, float llx, float lly, float urx, float ury, float y) { canvas.begintext(); basefont bf = null; try { bf = basefont.createfont(basefont.zapfdingbats, "", basefont.embedded); } catch (exception e) { e.printstacktrace(); canvas.setfontandsize(bf, 12); // left canvas.showtextaligned(element.align_center, string.valueof((char) 220), llx - 10, y, 0); // right canvas.showtextaligned(element.align_center, string.valueof((char) 220), urx 10, y 8, 180); canvas.endtext(); }); // 直线 paragraph p1 = new paragraph(const_nezha ,static_font_chinese); p1.add(new chunk(new lineseparator())); p1.add(const_bibidong); document.add(p1); // 点线 paragraph p2 = new paragraph(const_nezha ,static_font_chinese); p2.add(new chunk(new dottedlineseparator())); p2.add(const_bibidong); document.add(p2); // 下滑线 lineseparator underline = new lineseparator(1, 100, null, element.align_center, -2); paragraph p3 = new paragraph(const_nezha_program ,static_font_chinese); p3.add(underline); document.add(p3); * 设置段落 public static void createpdfwithalignment() throws exception { fileoutputstream out = new fileoutputstream(file_dir "createpdfwithalignment.pdf"); paragraph p = new paragraph("never frown, even when you are sad, because you never know who is falling in love with your smile;" "you will see exactly what life is worth, when all the rest has gone;" "it is very simple to be happy, but it is very difficult to be simple.恰卡编程网"); // 默认 p.setalignment(element.align_justified); document.add(p); // 慢慢的向右移动 p.setindentationleft(1 * 15f); p.setindentationright((5 - 1) * 15f); // 居右 p.setalignment(element.align_right); p.setspacingafter(15f); // 居左 p.setalignment(element.align_left); p.setspacingbefore(15f); // 居中 p.setalignment(element.align_center); * 删除页 public static void createpdftodeletepage() throws exception { fileoutputstream out = new fileoutputstream(file_dir "createpdftodeletepage.pdf"); pdfwriter writer = pdfwriter.getinstance(document, out); pdfreader reader = new pdfreader(file_dir "createpdftodeletepage.pdf"); reader.selectpages("1,3"); pdfstamper stamp = new pdfstamper(reader, new fileoutputstream(file_dir "createpdftodeletepage2.pdf")); * 插入 page public static void insertpage() throws exception { fileoutputstream out = new fileoutputstream(file_dir "insertpage.pdf"); pdfreader reader = new pdfreader(file_dir "insertpage.pdf"); pdfstamper stamp = new pdfstamper(reader, new fileoutputstream(file_dir "insertpage2.pdf")); stamp.insertpage(2, reader.getpagesize(1)); columntext ct = new columntext(null); ct.addelement(new paragraph(24, new chunk("insert page"))); ct.setcanvas(stamp.getovercontent(2)); ct.setsimplecolumn(36, 36, 559, 770); * 分割 page public static void splitpdf() throws exception { fileoutputstream out = new fileoutputstream(file_dir "splitpdf.pdf"); document.add(new paragraph(const_page_four, static_font_chinese)); pdfreader reader = new pdfreader(file_dir "splitpdf.pdf"); document dd = new document(); pdfwriter writer = pdfwriter.getinstance(dd, new fileoutputstream(file_dir "splitpdf1.pdf")); dd.open(); pdfcontentbyte cb = writer.getdirectcontent(); dd.newpage(); cb.addtemplate(writer.getimportedpage(reader, 1), 0, 0); cb.addtemplate(writer.getimportedpage(reader, 2), 0, 0); dd.close(); writer.close(); document dd2 = new document(); pdfwriter writer2 = pdfwriter.getinstance(dd2, new fileoutputstream(file_dir "splitpdf2.pdf")); dd2.open(); pdfcontentbyte cb2 = writer2.getdirectcontent(); dd2.newpage(); cb2.addtemplate(writer2.getimportedpage(reader, 3), 0, 0); cb2.addtemplate(writer2.getimportedpage(reader, 4), 0, 0); dd2.close(); writer2.close(); * 合并 pdf 文件 public static void mergepdf() throws exception { pdfreader reader1 = new pdfreader(file_dir "splitpdf1.pdf"); pdfreader reader2 = new pdfreader(file_dir "splitpdf2.pdf"); fileoutputstream out = new fileoutputstream(file_dir "mergepdf.pdf"); document document = new document(); java.util.list readers = new arraylist(); readers.add(reader1); readers.add(reader2); int pageofcurrentreaderpdf = 0; iterator iteratorpdfreader = readers.iterator(); while (iteratorpdfreader.hasnext()) { pdfreader pdfreader = iteratorpdfreader.next(); // 在目标中为每个源页面创建一个新页面 while (pageofcurrentreaderpdf < pdfreader.getnumberofpages()) { document.newpage(); pageofcurrentreaderpdf ; pdfimportedpage page = writer.getimportedpage(pdfreader, pageofcurrentreaderpdf); cb.addtemplate(page, 0, 0); pageofcurrentreaderpdf = 0; out.flush(); out.close(); * 排序page public static void sortpage() throws exception { fileoutputstream out = new fileoutputstream(file_dir "sortpage.pdf"); writer.setlinearpagemode(); document.add(new paragraph(const_page_five, static_font_chinese)); int[] order = { 4, 3, 2, 1 }; writer.reorderpages(order); * 页眉页脚 public static void setheaderfooter() throws exception { pdfwriter writer = pdfwriter.getinstance(document, new fileoutputstream(file_dir "setheaderfooter.pdf")); writer.setpageevent(new pdfpageeventhelper() { public void onendpage(pdfwriter writer, document document) { pdfcontentbyte cb = writer.getdirectcontent(); cb.savestate(); cb.begintext(); basefont bf = null; try { bf = basefont.createfont(basefont.helvetica, basefont.winansi, basefont.embedded); } catch (exception e) { e.printstacktrace(); cb.setfontandsize(bf, 10); // header float x = document.top(-20); // 左 cb.showtextaligned(pdfcontentbyte.align_left, "h-left", document.left(), x, 0); // 中 cb.showtextaligned(pdfcontentbyte.align_center, writer.getpagenumber() " page", (document.right() document.left()) / 2, x, 0); // 右 cb.showtextaligned(pdfcontentbyte.align_right, "h-right", document.right(), x, 0); // footer float y = document.bottom(-20); cb.showtextaligned(pdfcontentbyte.align_left, "f-left", document.left(), y, 0); cb.showtextaligned(pdfcontentbyte.align_center, writer.getpagenumber() " page", (document.right() document.left()) / 2, y, 0); cb.showtextaligned(pdfcontentbyte.align_right, "f-right", document.right(), y, 0); cb.endtext(); cb.restorestate(); document.add(new paragraph("1 page")); document.add(new paragraph("2 page")); document.add(new paragraph("3 page")); document.add(new paragraph("4 page")); public static void addcolumntext() throws exception { fileoutputstream out = new fileoutputstream(file_dir "addcolumntext.pdf"); pdfcontentbyte canvas = writer.getdirectcontent(); phrase phrase1 = new phrase(const_bibidong " is a beauty!left", static_font_chinese); phrase phrase2 = new phrase(const_bibidong " is a beauty!right", static_font_chinese); phrase phrase3 = new phrase(const_bibidong " is a beauty!center", static_font_chinese); columntext.showtextaligned(canvas, element.align_left, phrase1, 200, 700, 0); columntext.showtextaligned(canvas, element.align_right, phrase2, 200, 600, 0); columntext.showtextaligned(canvas, element.align_center, phrase3, 200, 500, 0); * 文档视图 public static void setview() throws exception { fileoutputstream out = new fileoutputstream(file_dir "setview.pdf"); writer.setpdfversion(pdfwriter.version_1_5); writer.setviewerpreferences(pdfwriter.pagemodefullscreen);// 全屏 public void onstartpage(pdfwriter writer, document document) { writer.settransition(new pdftransition(pdftransition.dissolve, 3)); writer.setduration(5);// 间隔时间 * 压缩pdf到zip public static void pdftozip() throws exception { zipoutputstream zip = new zipoutputstream(new fileoutputstream(file_dir "pdftozip.zip")); for (int i = 1; i <= 3; i ) { zipentry entry = new zipentry(const_nezha i ".pdf"); zip.putnextentry(entry); document = new document(); pdfwriter writer = pdfwriter.getinstance(document, zip); writer.setclosestream(false); document.open(); document.add(new paragraph(const_nezha i, static_font_chinese)); document.close(); zip.closeentry(); zip.close(); * 添加注释 public static void addannotation() throws exception { fileoutputstream out = new fileoutputstream(file_dir "addannotation.pdf"); document doc = new document(); pdfwriter writer = pdfwriter.getinstance(doc, out); doc.open(); doc.add(new paragraph(const_page_first, static_font_chinese)); doc.add(new annotation("title", "this is a annotation!")); doc.newpage(); doc.add(new paragraph(const_page_second, static_font_chinese)); chunk chunk = new chunk(const_nezha); chunk.setannotation(pdfannotation.createtext(writer, null, "title", "this is a another annotation!", false, "comment")); doc.add(chunk); // 添加附件 //doc.newpage(); //doc.add(new paragraph(const_page_third, static_font_chinese)); //chunk chunk2 = new chunk(const_bibidong, static_font_chinese); //pdfannotation annotation = pdfannotation.createfileattachment(writer, null, "title", null, const_jpg_java, const_jpg_nginx); //annotation.put(pdfname.name, new pdfstring("paperclip")); //chunk2.setannotation(annotation); //doc.add(chunk2); doc.close(); }

六、更多的java代码实例

【java 代码实例 1】java反射三种方法

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【java 代码实例 4】javacompiler编译多java文件

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【java 代码实例 6】fileutils、stringutil、collectionutils、arrayutils（附代码示例）

【java 代码实例 7】jsoup解析html

【java 代码实例 8】qrcode生成二维码

【java 代码实例 9】java通过process执行c# exe程序

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