优化这段代码： File file = new File(firstDocPath); InputStream ins = new FileInputStream(file); //注册xdocreport实例并加载FreeMarker模板引擎 IXDocReport report = XDocReportRegistry.getRegistry().loadReport(ins, TemplateEngineKind.Freemarker); //创建xdocreport上下文对象 IContext context = report.createContext(); //创建要替换的文本变量 context.put("casePersons", casePersonList); context.put("bookResults", bookResultList);//创建字段元数据 FieldsMetadata fm = report.createFieldsMetadata();fm.load("shortVideoResults", ShortVideoAnalysisResultDto.class, true); fm.load("softwareResults", SoftwareAnalysisResultDto.class, true); report.setFieldsMetadata(fm);response.setCharacterEncoding("utf-8"); response.setContentType("application/vnd.msword"); //response.setContentType("application/octet-stream"); String fileName = reportName + ".docx"; response.setHeader("Content-Disposition", "attachment;filename=".concat(String.valueOf(URLEncoder.encode(fileName, "UTF-8")))); report.process(context, response.getOutputStream());

以下是对代码的优化建议：

1. 将文件操作的代码封装在一个方法中，以便复用和维护。

2. 使用try-with-resources自动关闭InputStream和OutputStream，可以避免手动关闭时出现的异常。

3. 使用常量或枚举类型代替魔法值，提高代码可读性。

4. 将重复的字符串拼接操作提取出来，避免在代码中重复出现。

5. 使用Lambda表达式简化代码，提高可读性。

下面是优化后的代码：

private void exportDocxFile(String firstDocPath, String reportName, List<CasePerson> casePersonList, List<BookResult> bookResultList) {
    try (InputStream ins = new FileInputStream(firstDocPath);
         OutputStream os = response.getOutputStream()) {

        IXDocReport report = XDocReportRegistry.getRegistry().loadReport(ins, TemplateEngineKind.Freemarker);
        IContext context = report.createContext();
        context.put("casePersons", casePersonList);
        context.put("bookResults", bookResultList);

        FieldsMetadata fm = report.createFieldsMetadata();
        fm.load("shortVideoResults", ShortVideoAnalysisResultDto.class, true);
        fm.load("softwareResults", SoftwareAnalysisResultDto.class, true);
        report.setFieldsMetadata(fm);

        response.setCharacterEncoding("utf-8");
        response.setContentType("application/vnd.msword");
        String fileName = reportName + ".docx";
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, StandardCharsets.UTF_8.toString()));

        report.process(context, os);

        logger.info("导出成功：" + fileName);
    } catch (Exception e) {
        logger.error("导出失败：" + e.getMessage());
    }
}