春天文件上传 - 获得期望MultipartHttpServletRequest：是一个MultipartResolver配置？错误 [英] Spring file upload - getting Expected MultipartHttpServletRequest: is a MultipartResolver configured? error

问题描述

我正在尝试使用 angular-file-upload 将Angular Web应用程序中的多个文件上传功能。目前，前端功能可以正常工作，但是每次上传都会抛出一个

  java.lang.IllegalStateException，java.io.IOException] ：
 java.lang.IllegalArgumentException：期望MultipartHttpServletRequest：
是一个MultipartResolver配置？ 
  

例外。

上传控制器定义为

  @Controller 
 @PropertySource（classpath：application.properties）
 public class FileUploadController {
 
 @Resource 
 private环境env; 
 
 @RequestMapping（value =/ fileupload，method = RequestMethod.POST）
 @ResponseBody 
 public List< String> fileUpload（@RequestParam（file）MultipartFile [] uploadFiles）抛出IllegalStateException，IOException {
 //文件处理逻辑
} 
} 
  

在我的 AppConfig.java 类中，我声明了bean

pre
$ b $ public CommonsMultipartResolver commonsMultipartResolver（）{
CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver（）;
commonsMultipartResolver.setDefaultEncoding（utf-8）;
commonsMultipartResolver.setMaxUploadSize（50000000）;
返回commonsMultipartResolver;

$ / code>

然后用
$ b启动web应用程序$ b

  @Override 
 public void onStartup（ServletContext servletContext）throws ServletException {
 
 AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext（）; 
 ctx.register（AppConfig.class）; 
 servletContext.addListener（new ContextLoaderListener（ctx））; 
 
 ctx.setServletContext（servletContext）; 
 ctx.refresh（）; 
 
动态servlet = servletContext.addServlet（SERVLET_NAME，新的DispatcherServlet（ctx））; 
 servlet.addMapping（/）; 
 servlet.setLoadOnStartup（1）; 
 //servlet.setMultipartConfig(ctx.getBean(MultipartConfigElement.class））; 
 
 
 
 $ b我不认为这是由于缺少< form> 元素，因为我可以看到 Content-Tyle 是 multipart / form -data ，请求有效负载设置得当。
 远程地址：192.168.33.10：80 
请求URL：http：//dev.jason.com/rest/fileupload 
请求方法：POST 
状态码：500内部服务器错误
请求标题
接受：* / * 
 Accept-Encoding：gzip，deflate 
 Accept-Language：zh-CN，en; q = 0.8 
 Cache-Control：no-cache 
连接：keep -alive 
 Content-Length：415235 
 Content-Type：multipart / form-data; border = ---- WebKitFormBoundaryBHlsldPQysTVpvwZ 
 Host：dev.jason.com 
 Origin：http：//dev.jason.com 
 Pragma：no-cache 
 Referer：http： //dev.jason.com/ 
用户代理：Mozilla / 5.0（Macintosh; Intel Mac OS X 10_10_1）AppleWebKit / 537.36（KHTML，如Gecko）Chrome / 38.0.2125.122 Safari / 537.36 
 Payload 
 ------ WebKitFormBoundaryBHlsldPQysTVpvwZ 
 Content-Disposition：form-data; NAME = 文件; filename =IMG_5072.jpg
 Content-Type：image / jpeg 
 
 ------ WebKitFormBoundaryBHlsldPQysTVpvwZ-- 
  
请注意，包含 
 
 
  @Bean 
 public MultipartConfigElement multipartConfigElement（）{
 MultipartConfigFactory multipartConfigFactory = new MultipartConfigFactory（）; 
 multipartConfigFactory.setMaxFileSize（10MB）; 
 multipartConfigFactory.setMaxRequestSize（50MB）; 
返回multipartConfigFactory.createMultipartConfig（）; 
 
 $ / code> 
在 AppConfig.java  
 
 
  servlet.setMultipartConfig（ctx.getBean（MultipartConfigElement.class））;在我的servlet初始化类中，
  
。
 
 
任何帮助的赞赏！
 
解决方案
 
 
 Spring的MVC堆栈要求 MultipartResolver  bean被称为 multipartResolver 。将您的 @Bean 方法更改为 
 
 
  @Bean 
 public CommonsMultipartResolver multipartResolver（）{
  
或
 
 
 <$ p 
 $ public $ CommonsMultipartResolver commonsMultipartResolver（）{
  


（$ name =multipartResolver

I'm trying to incorporate multiple file upload functionality in my Angular web application using angular-file-upload. Currently, the front end functionality works, but each upload attempt throws a

java.lang.IllegalStateException,java.io.IOException]: 
    java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: 
        is a MultipartResolver configured?

exception.

The Upload Controller is defined as

@Controller
@PropertySource("classpath:application.properties")
public class FileUploadController {

    @Resource
    private Environment env;

    @RequestMapping(value = "/fileupload", method = RequestMethod.POST)
    @ResponseBody
    public List<String> fileUpload(@RequestParam("file") MultipartFile[] uploadFiles) throws IllegalStateException, IOException {
        //file processing logic
    }
 }

In my AppConfig.java class, I declare the bean

@Bean
public CommonsMultipartResolver commonsMultipartResolver(){
    CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
    commonsMultipartResolver.setDefaultEncoding("utf-8");
    commonsMultipartResolver.setMaxUploadSize(50000000);
    return commonsMultipartResolver;
}

and start the web application with

@Override
public void onStartup(ServletContext servletContext) throws ServletException {

    AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
    ctx.register(AppConfig.class);
    servletContext.addListener(new ContextLoaderListener(ctx));

    ctx.setServletContext(servletContext);
    ctx.refresh();

    Dynamic servlet = servletContext.addServlet(SERVLET_NAME, new DispatcherServlet(ctx));
    servlet.addMapping("/");
    servlet.setLoadOnStartup(1);
    //servlet.setMultipartConfig(ctx.getBean(MultipartConfigElement.class));
}

I do not think it is due to the lack of a <form> element in my Angular view, because I can see that Content-Tyle is multipart/form-data and that the Request Payload is set appropriately.

Remote Address:192.168.33.10:80
Request URL:http://dev.jason.com/rest/fileupload
Request Method:POST
Status Code:500 Internal Server Error
Request Headers
  Accept:*/*
  Accept-Encoding:gzip,deflate
  Accept-Language:en-US,en;q=0.8
  Cache-Control:no-cache
  Connection:keep-alive
  Content-Length:415235
  Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryBHlsldPQysTVpvwZ
  Host:dev.jason.com
  Origin:http://dev.jason.com
  Pragma:no-cache
  Referer:http://dev.jason.com/
  User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.122 Safari/537.36
Request Payload
   ------WebKitFormBoundaryBHlsldPQysTVpvwZ
   Content-Disposition: form-data; name="file"; filename="IMG_5072.jpg"
   Content-Type: image/jpeg

   ------WebKitFormBoundaryBHlsldPQysTVpvwZ--

Note that this issue still occurs when including

@Bean
public MultipartConfigElement multipartConfigElement(){
    MultipartConfigFactory multipartConfigFactory = new MultipartConfigFactory();
    multipartConfigFactory.setMaxFileSize("10MB");
    multipartConfigFactory.setMaxRequestSize("50MB");
    return multipartConfigFactory.createMultipartConfig();
}

in AppConfig.java and uncommenting the command

servlet.setMultipartConfig(ctx.getBean(MultipartConfigElement.class));

in my servlet initializer class.

Any help is appreciated!

解决方案

Spring's MVC stack requires that the MultipartResolver bean be called multipartResolver. Change your @Bean method to

@Bean
public CommonsMultipartResolver multipartResolver(){

or

@Bean(name = "multipartResolver")
public CommonsMultipartResolver commonsMultipartResolver(){

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