init

.gitignore

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+*.pdf
+target
+out
+.idea
+*.iml

fonts/OFL.txt

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+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <packaging>jar</packaging>
+
+    <name>JavaMarkdownToPdf</name>
+    <groupId>soselab.stanley</groupId>
+    <artifactId>JavaMarkdownToPdf</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/com.itextpdf/itext7-core -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>itext7-core</artifactId>
+            <version>7.1.12</version>
+            <type>pom</type>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.itextpdf/html2pdf -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>html2pdf</artifactId>
+            <version>3.0.1</version>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/org.commonjava.googlecode.markdown4j/markdown4j -->
+        <dependency>
+            <groupId>org.commonjava.googlecode.markdown4j</groupId>
+            <artifactId>markdown4j</artifactId>
+            <version>2.2-cj-1.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <release>11</release>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>soselab.stanley.JavaMarkdownToPdf.JavaMarkdownToPdf</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/main/java/soselab/stanley/JavaMarkdownToPdf/JavaMarkdownToPdf.java

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+package soselab.stanley.JavaMarkdownToPdf;
+
+import com.itextpdf.html2pdf.ConverterProperties;
+import com.itextpdf.html2pdf.HtmlConverter;
+import com.itextpdf.layout.font.FontProvider;
+import org.markdown4j.Markdown4jProcessor;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public class JavaMarkdownToPdf {
+    private final Markdown4jProcessor markdown4jProcessor;
+    private String title;
+
+    public JavaMarkdownToPdf() {
+        markdown4jProcessor = new Markdown4jProcessor();
+    }
+
+    public byte[] convert(String markdown) {
+        try {
+            return getPdf(fixHtml(markdown4jProcessor.process(markdown).trim()));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public JavaMarkdownToPdf setTitle(String title) {
+        this.title = title;
+        return this;
+    }
+
+    private byte[] getPdf(String html) {
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        try {
+            InputStream input = new ByteArrayInputStream(html.getBytes(StandardCharsets.UTF_8));
+            ConverterProperties converterProperties = new ConverterProperties();
+            converterProperties.setFontProvider(new FontProvider());
+            converterProperties.getFontProvider().addFont("fonts/NotoSansCJKtc-Regular.otf");
+            converterProperties.getFontProvider().addFont("fonts/NotoSansCJKtc-Bold.otf");
+            HtmlConverter.convertToPdf(input, os, converterProperties);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return os.toByteArray();
+    }
+
+    private String fixHtml(String html) {
+        return
+            "<!DOCTYPE html>\n<html>\n" +
+            "<head><title>" +
+            title +
+            "</title></head>" +
+            "<body>\n" + html + "\n</body></html>";
+    }
+
+    private static String getMarkDownString(String dr, String dh, String ou) {
+        String markdown =
+                "# PDAS 個人資料授權系統\n" +
+                        "\n---\n\n" +
+                        "\n- 簽署人 (資料請求者)：" + dr +
+                        "\n- 簽署人 (資料保管者)：" + dh +
+                        (ou != null ? "\n- 簽署人 (授權人)：" + ou : "") +
+                        "\n\n---\n\n"
+                ;
+
+        final String contractBody =
+                "# 資料授權同意書\n" +
+                        "\n" +
+                        "### 契約簽署人\n" +
+                        "- 資料請求者 (甲方)：SOSELab Co.\n" +
+                        "- 資料保管者 (乙方)：台灣電力公司\n" +
+                        "- 授權人 (丙方)\n" +
+                        "\n" +
+                        "### 資料授權範圍\n" +
+                        "- 目的：分析用電量，建立用電預測模型。\n" +
+                        "- 期間：不限。\n" +
+                        "- 地區：不限。\n" +
+                        "- 對象：SOSELab Co.\n" +
+                        "- 方式：自動化機器或非自動方式。\n" +
+                        "\n" +
+                        "*依個資法第三條規定，當事人可以行使以下權利，請求閱覽、副本、更正、停止處理利用、刪除。*\n" +
+                        "\n" +
+                        "### 權利以及關係\n" +
+                        "1. 甲方須提供權利金給資料所有人丙方以及資料保管人乙方。\n" +
+                        "2. 丙方同意授權上方載述之資料範圍給甲方利用。";
+
+
+        return markdown + contractBody;
+    }
+    public static void main(String[] args) {
+        final String str = getMarkDownString("SOSELab Co.", "台灣電力公司", "Stanley");
+        try {
+            Files.write(Paths.get("test.pdf"), new JavaMarkdownToPdf().convert(str));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}