在 spring mvc 中上传多个文件

Question

我正在尝试使用 spring mvc 和 commons-fileupload*.jar 上传多个文件。我正在使用 HttpServletRequest 获取请求对象，然后使用 request.getPart() 获取文件部分。但是当我运行我发现下面的代码错误。

java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided

代码如下：

public ModelAndView uploadCon(@RequestParam Map<String,String> map, HttpServletRequest request)
{
    Part part1=request.getPart("wallpaper0");
    Part part2=request.getPart("wallpaperx");
    //then write these files 
}

spring-servlet.xml 文件的 bean 定义如下：

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

Answer 1

这是示例

@RequestMapping(value = "/upload", method = RequestMethod.POST)
public @ResponseBody
ResponseEntity<Map<String, Object>> handleFileUpload(
        @RequestParam("file1") MultipartFile file1,
        @RequestParam("file2") MultipartFile file2) {
    Map<String, Object> map = new HashMap<String, Object>();
    map.put("status", "failure");
    try {
        if (!file1.isEmpty() && !file2.isEmpty()) {

            // get the files here

            map.put("status", "success");
        }
    } catch (Exception e) {
        LOGGER.severe(e.toString());
    }

    ResponseEntity<Map<String, Object>> responseEntity = new ResponseEntity<Map<String, Object>>(
            map, HttpStatus.OK);

    return responseEntity;
}

并确保您已添加

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="maxUploadSize" value="50000000"/>
</bean>

在您的 spring.xml 文件中。

或者 refer this sample 如果你想得到文件列表 List<MultipartFile>.

在 spring mvc 中上传多个文件

Multiple Files upload in spring mvc

java

file

spring-mvc

apache-commons-fileupload