1、添加maven依赖
<!-- itext -->
<dependency>
<groupId>com.lowagie</groupId>
<artifactId>itext</artifactId>
<version>2.1.0</version>
</dependency>
<!-- renderer -->
<dependency>
<groupId>org.xhtmlrenderer</groupId>
<artifactId>core-renderer</artifactId>
<version>R8</version>
</dependency>
<!--freemarker-->
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.28</version>
</dependency>
<!-- hutool 用到了模板引擎和工具类 -->
<!-- 官方文档:https://www.javajike.com/book/hutool/chapter13/8601729e6eee0c3a901fc95a303d639d.html -->
<!-- 官方API文档:https://apidoc.gitee.com/loolly/hutool/ -->
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>4.1.0</version>
</dependency>
<!-- commons-text 用到反转义-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-text</artifactId>
<version>1.8</version>
</dependency>
<!-- guava 用了一些工具方法-->
<dependency>