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itext7でPDFを作成する~HelloWorld~

Last updated at Posted at 2018-12-30

#itext7でPDFを作成
itext7というPDFを作成するライブラリがあるのですが、日本語のドキュメントが少ないので、まとめていこうと思います。
eclipse+gradleでやっていこうと思います。

#build.gradleの設定

build.gradle
dependencies {
~略~
    // itext7を追加
    implementation 'com.github.itext.itext7:layout:7.1.4'
    // itext7用日本語フォントを追加
    implementation 'com.github.itext.itext7:font-asian:7.1.4'
    // slf4jを追加
    implementation 'org.slf4j:slf4j-log4j12:1.7.21'
}
allprojects {
    repositories {
        maven { url 'https://jitpack.io' }
    }
}

「slf4j」も読み込んでおかないと以下のようなエラーが出ます。

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

#HelloWorldを実行

HelloWorld.java
import java.io.File;

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;

public class HelloWorld {
    public static void main(String[] args) throws Exception {
        //Initialize PDF writer
        PdfWriter writer = new PdfWriter(new File("HelloWorld.pdf"));
 

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(writer);
 
        // Initialize document
        Document document = new Document(pdf);
 
        //Add paragraph to the document
        document.add(new Paragraph("Hello World!"));
 
        //Close document
        document.close();
   }
}

#次回:日本語を出そう
さて、チュートリアルの"Hello World!"部分を日本語に置き換えてみると・・・
あれ?真っ白け?
次回はその辺りから!

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