spring ajax文件上传的问题

Question

我有一个简单的表单,可以选择上传图片,但上传文件,我没有使用此方法

<form:input path="logoData" id="image" type="file" />

相反,我使用的是ajax upload jquery pulgin.问题是upload.parseRequest(request)在下面的代码中返回null:

@RequestMapping(value = "/upload.htm", method = RequestMethod.POST)
public @ResponseBody String upload(HttpServletRequest request) throws FileUploadException{

    // Create a factory for disk-based file items
    FileItemFactory factory = new DiskFileItemFactory();

    // Create a new file upload handler
    ServletFileUpload upload = new ServletFileUpload(factory);

    // Parse the request
    List<FileItem> items = upload.parseRequest(request);
     System.out.println("====ITEMS====" + items.size());


     System.out.println("----REQUEST---" +request.getParameter("uploadImg"));
        System.out.println("-----SIZE----" +request.getParameterMap().size());
        Map<String, String> map = request.getParameterMap();

        for(Map.Entry<String, String> entry : map.entrySet()){
            System.out.println("----KEY---" + entry.getKey() + "----value---" + entry.getValue());
        }


 // Check that we have a file upload request
    boolean isMultipart = ServletFileUpload.isMultipartContent(request);

    System.out.println("----IS MULTIPART---" +isMultipart);
    return "hello";
}

日志输出是:

==== ITEMS ==== 0
---- REQUEST --- null
----- SIZE ---- 0
---- IS MULTIPART --- true

我的javascript代码是:

new AjaxUpload('#upload', {
action : my_url+ 'methodName/upload.htm',
name : 'uploadImg',
autoSubmit : true,
responseType: 'html',
onChange: function(file, extension){   },   
onSubmit: function(file, extension) {

},
onComplete: function(file, html) {
    alert(file);
    alert(html);

}

});

IS MULTIPART显示为true但如何获取文件名以及如何存储它.我尝试了一个没有ajax的例子,使用数据类型CommonsMultipartFile可以正常工作.此外,我在PHP中使用了ajaxupload,我得到的文件名为$ _FILES ['image'] ['name'],但在java中不知道,因为我是java的新手.我在这个网站上关注了我的类似问题,但没有成功.

谢谢.

Answer 1

你可以缩短它.你需要一个多部分解析器:

<bean id="multipartResolver"
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

    <!-- one of the properties available; the maximum file size in bytes -->
    <property name="maxUploadSize" value="100000"/>
</bean>

然后:

@Controller
public class FileUpoadController {

    @RequestMapping(value = "/form", method = RequestMethod.POST)
    public String handleFormUpload(@RequestParam("file") MultipartFile file) {

        if (!file.isEmpty()) {
            byte[] bytes = file.getBytes();
            // store the bytes somewhere
           return "redirect:uploadSuccess";
       } else {
           return "redirect:uploadFailure";
       }
    }

}