java上载文件失败，原因是Vaadin Spring PlupLocaddon

Question

如果我想上传一个带有Vaadin特定小部件/插件的文件，我会收到一些警告，文件不会被上传

我不知道为什么会出现这种警告。我检查了整个插件，看到了一些JavaScript的用法，它们使用了那篇文章，但我不明白为什么它会抛出一些警告，根本不起作用

我在没有Spring集成的情况下检查了插件，一切正常

以下是警告：

2015-08-16_15:44:53.777 WARN  o.s.web.servlet.PageNotFound - Request method 'POST' not supported
2015-08-16_15:44:53.777 WARN  o.s.w.s.m.s.DefaultHandlerExceptionResolver - Handler execution resulted in exception: Request method 'POST' not supported
2015-08-16_15:44:54.937 WARN  o.s.web.servlet.PageNotFound - Request method 'POST' not supported
2015-08-16_15:44:54.938 WARN  o.s.w.s.m.s.DefaultHandlerExceptionResolver - Handler execution resulted in exception: Request method 'POST' not supported
2015-08-16_15:44:55.977 WARN  o.s.web.servlet.PageNotFound - Request method 'POST' not supported
2015-08-16_15:44:55.977 WARN  o.s.w.s.m.s.DefaultHandlerExceptionResolver - Handler execution resulted in exception: Request method 'POST' not supported
2015-08-16_15:44:57.019 WARN  o.s.web.servlet.PageNotFound - Request method 'POST' not supported
2015-08-16_15:44:57.020 WARN  o.s.w.s.m.s.DefaultHandlerExceptionResolver - Handler execution resulted in exception: Request method 'POST' not supported

我的代码如下所示，是一个功能性最小的简单init（）：

protected void init (VaadinRequest request){
    HorizontalLayout root = new HorizontalLayout();
    root.setSizeFull();
    setContent(root);
    setSizeFull();

    PluploadManager manager = new PluploadManager();
    manager.getUploader().setMaxFileSize("10mb");
    manager.getUploader().addFileUploadedListener(new Plupload.FileUploadedListener() {
        public void onFileUploaded(PluploadFile file) {
            Notification.show("I've just uploaded file: " + file.getName());
        }
    });

    manager.getUploader().addErrorListener(new Plupload.ErrorListener() {
        public void onError(PluploadError error) {
            Notification.show("There was an error: " + error.getMessage() + " (" + error.getType() + ")",
                    Notification.Type.ERROR_MESSAGE);
        }
    });

    root.addComponent(manager);
}

以下是我在POM中的依赖项：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-spring-boot-starter</artifactId>
    <version>1.0.0.beta3</version>
</dependency>
<dependency>
    <groupId>pl.exsio</groupId>
    <artifactId>plupload-vaadin</artifactId>
    <version>2.0.0</version>
</dependency>

当前技术：

• Java 1.8
• 瓦丁7.5.3
• 弹簧靴1.3.0。M3（https://start.spring.io/）
• 马文波姆
• Vaadin小部件/加载项：PLupload包装：（https://vaadin.com/directory#!addon/plupload-wrapper-for-vaadin-7x）

Answer 1

这是不支持开箱即用的

原因是，URL /pluploader-upload-action没有被Vaadin的servlet处理。Vaadin的servlet的真正URL是/vaadinServlet。Vaadin使用根URL上的ServletForwardingController和/Vaadin注册一个SimpleUrlHandlerMapping。 对于其他URL，您需要自己注册

试试这个解决方法

在应用中。特性：

multipart.enabled=false

添加以下配置

@Configuration
public class VaadinPluploadConfiguration {
  private static final String PLUPLOADER_URL = "/pluploader-upload-action";
  @Inject
  private Controller vaadinUiForwardingController;

  @Bean
  public SimpleUrlHandlerMapping vaadinForwardingHandlerMapping() {
    SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();
    mapping.setOrder(Integer.MIN_VALUE + 1);
    Map<String, Object> urlMappings = new HashMap<String, Object>();
    urlMappings.put(PLUPLOADER_URL, vaadinUiForwardingController);
    mapping.setUrlMap(urlMappings);
    return mapping;
  }
}

禁用multipart是为了允许Plupload加载项处理multipart部分，否则该部分将由Spring处理，并将破坏加载项