https://github.com/itext/itextpdf

您可以在此处找到最新版本：

http://github.com/itext/itextpdf/releases/latest

依赖加入：

properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <itext.version>5.5.1</itext.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>${itext.version}</version>
        </dependency>

        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-pdfa</artifactId>
            <version>${itext.version}</version>
        </dependency>

        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-xtra</artifactId>
            <version>${itext.version}</version>
        </dependency>

        <dependency>
            <groupId>com.itextpdf.tool</groupId>
            <artifactId>xmlworker</artifactId>
            <version>${itext.version}</version>
        </dependency>
    </dependencies>