用Java写一个docx文件的下载接口

可以使用Apache POI库来生成并下载docx文件。以下是一个简单的Java代码示例：

@RequestMapping(value = "/download/docx", method = RequestMethod.GET)
public void downloadDocx(HttpServletResponse response) throws IOException {
    XWPFDocument document = new XWPFDocument();
    XWPFParagraph paragraph = document.createParagraph();
    XWPFRun run = paragraph.createRun();
    run.setText("Hello, World!");

    // 设置响应头
    response.setHeader("Content-Disposition", "attachment;filename=test.docx");
    response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");

    // 将文档写入响应体
    OutputStream out = response.getOutputStream();
    document.write(out);
    out.flush();
    out.close();
}

这个接口将生成一个包含"Hello, World!"文本的docx文件并下载到客户端。