相关疑难解决方法(0)

我正在尝试使用Spring 3编写一个单元测试来处理文件上传控制器.现在,如果我通过控制器将图像发送到我的服务方法,一切正常.但是在进行直接单元测试时,我得到一个空指针异常.

DiskFilteItem当我手动实例化它时,它内部的属性"dfos"似乎是null,但是当MultipartFile从控制器检索a时它被填充.

    File file = new File("//Users//test//Downloads//testimage.jpg");
    log.info("found file: " +file.exists());
    log.info("file size: " +file.length());
    String fieldName = "field";
    String contentType = "image/jpeg";
    boolean isFormField = false;
    String fileName = "testimage.jpg";
    int sizeThreshold = 10240;

    DiskFileItemFactory factory = new DiskFileItemFactory();

    DiskFileItemFactory factory = new DiskFileItemFactory();
    // throws null pointer
    FileItem fi = factory.createItem(fieldName,contentType,isFormField,fileName);

    // so does this one
    DiskFileItem item = new DiskFileItem(fieldName, contentType, isFormField, fileName, sizeThreshold, file);
    MultipartFile f = new CommonsMultipartFile(item);

我觉得我在设置中遗漏了一些愚蠢的东西.我的pom文件包含以下依赖项.

    <dependency>
        <groupId>commons-fileupload</groupId> …