@RequestMapping(value = "/image.action") public String upload( @RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/"; String fileName = file.getOriginalFilename(); int i = fileName.lastIndexOf("."); String name = String.valueOf(VeDate.getStringDatex()); String type = fileName.substring(i + 1); fileName = name + "." + type; File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } // 保存第一张图片 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } // 保存第二张图片 String fileName1 = file1.getOriginalFilename(); int j = fileName1.lastIndexOf("."); String name1 = String.valueOf(VeDate.getStringDatex()); String type1 = fileName1.substring(j + 1); fileName1 = name1 + "." + type1; File targetFile1 = new File(path, fileName1); if (!targetFile1.exists()) { targetFile1.mkdirs(); } try { file1.transferTo(targetFile1); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("imageFileName", fileName); model.addAttribute("image1FileName", fileName1); return "page/saveimage"; }在上传第一张图片时会因为第二张图片为空报空指针异常错误

在上传第一张图片时，代码并没有判断第二张图片是否为空，所以当第二张图片为空时，会导致 `file1` 变量为空，从而导致空指针异常错误。为了解决这个问题，你可以在上传第二张图片之前，先判断一下第二张图片是否为空，如果为空，则跳过第二张图片的上传操作。你可以尝试修改代码如下：

@RequestMapping(value = "/image.action")
public String upload(@RequestParam(value ="image", required = false) MultipartFile file, 
                     @RequestParam(value ="image1", required = false) MultipartFile file1, 
                     HttpServletRequest request, ModelMap model) {
    String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/";
    String fileName = file.getOriginalFilename();
    int i = fileName.lastIndexOf(".");
    String name = String.valueOf(VeDate.getStringDatex());
    String type = fileName.substring(i + 1);
    fileName = name + "." + type;
    File targetFile = new File(path, fileName);
    if (!targetFile.exists()) {
        targetFile.mkdirs();
    }
    // 保存第一张图片
    try {
        file.transferTo(targetFile);
    } catch (Exception e) {
        e.printStackTrace();
    }
    // 判断第二张图片是否为空
    if (file1 != null && !file1.isEmpty()) {
        String fileName1 = file1.getOriginalFilename();
        int j = fileName1.lastIndexOf(".");
        String name1 = String.valueOf(VeDate.getStringDatex());
        String type1 = fileName1.substring(j + 1);
        fileName1 = name1 + "." + type1;
        File targetFile1 = new File(path, fileName1);
        if (!targetFile1.exists()) {
            targetFile1.mkdirs();
        }
        try {
            file1.transferTo(targetFile1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        model.addAttribute("image1FileName", fileName1);
    }
    model.addAttribute("imageFileName", fileName);
    return "page/saveimage";
}