将多个 docx 文件使用 POI 进行合并，生成单个文档，包含图片

1 添加 maven 依赖，需要使用 poi 的依赖项

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
        </dependency>
 
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
        </dependency>
 
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
        </dependency>
 
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
        </dependency>

• 对于对个文档合并中间需要添加分页符有两种方式：段前添加分页符、段后添加分页符

段后添加分页符示例代码

//段后添加分页符
XWPFDocument doc;
XWPFParagraph paragraph = doc.createParagraph();
paragraph.setPageBreak(true);

段前添加分页符示例

//段前添加分页符
XWPFDocument doc;
XWPFRun run = doc.getLastParagraph().createRun();
run.addBreak(BreakType.PAGE)