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README
Apache-2.0

1.简介

上图为导出pdf的几种方式,有基于工具的,代码实现主要是JAVA。

  • flying-saucer:对html,xhtml等做渲染,个人理解就是相当于浏览器对css/html的展示一样,导成pdf的功能是靠iText等实现的
    • flying-saucer-pdf:基于iText 2.x的实现
    • flying-saucer-pdf-openpdf:基于openpdf实现
    • flying-saucer-pdf-iText5:基于iText5实现
  • openpdf:基于iText的开源版本,可免费使用,目前一直有人维护。功能上比iText少,比如电子签名(个人认知,虽然提供了PdfSignature,PdfSignatureAppearance 等,但个人从源码的test中也没有感觉适用生成电子签名的方式,知道的朋友交流一下)
  • iText:传说是adobe公司的,而pdf又以adobe pdf市场占用率最高,可想而知对pdf的支持是最好的。iText有3个大版本,iText 2.x可以免费使用, iText 5.x部分商用,iText 7.x全商用,所以到用iText得摸着腰包来选择。iText 7说是性能比5有55%的提升,后期有时间测一把。

2.使用

分支:

  • master:基于openpdf实现(可商用,所以定为主分支)
  • iText-5:基于iText 5实现(尚未开始) pdf生成组件,支持以下无参、有参方式生成pdf:
  1. 无参:静态文件,比如静态html(css最高支持css 2.1,不支持css3)
  2. 有参:pdf表单域,可通过Acrobat或者福昕等工具制作
  3. 有参:模板引擎动态生成,thymeleaf和Freemarker

2.1 依赖

依赖版本

<flying-saucer.version>9.1.22</flying-saucer.version>
<itext-asian.version>5.2.0</itext-asian.version>
<thymeleaf.version>2.6.10</thymeleaf.version>
<freemarker.version>2.3.31</freemarker.version>
<ognl.version>3.1.20</ognl.version>

公共依赖

<dependency>
    <groupId>org.xhtmlrenderer</groupId>
    <artifactId>flying-saucer-pdf-openpdf</artifactId>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext-asian</artifactId>
</dependency>

2.1.1 thymeleaf模板引擎依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
    <groupId>ognl</groupId>
    <artifactId>ognl</artifactId>
</dependency>

2.1.2 Freemarker模板引擎依赖

<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
</dependency>

2.详细介绍

2.1 工具类

各工具类demo见*Test.java
PdfTextUtils: 把静态html、xhtml转成pdf
PdfAcroUtils: 把pdf表单域的模板转成pdf工具类
PdfFreemarkerUtils: 把freemarker模板赋值后转成pdf
PdfThymeleafUtils: 把thymeleaf模板赋值后转后pdf

3.2 使用方法

3.2.1 带模板引擎的模板路径

  • 配置模板默认放在resources/templates目录下,需要自定义的可以通过*Utils的setTemplateDirPath变更存放目录

3.2.2 字体及中文

  • 表单域用模板中定义好的字体
  • 其他生成工具类中默认为resources下的simsun.ttc,在html中需要同时指定字体为SimSun,比如css通用指定
body{font-family: 'SimSun'}

可通过setFontPath自定义字体路径

  • 转换的方法是通过export()转换成byte[]数组,如果需要生成文件,可自行转换
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简介

通过JAVA实现pdf导出的几种实现 展开 收起
Java 等 3 种语言
Apache-2.0
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