如何将 FileUploadInterceptor 与 struts2 约定插件一起使用

Question

我试图通过注释在操作上设置 FileUploadInterceptor ：

@Namespace("/")
@ParentPackage("my-package")
@Result(name = "success", location = "/WEB-INF/jsp/result.jsp")
@InterceptorRef("fileUpload")
public class UploadAction extends ActionSupport {

  private File upload;
  private String uploadContentType;
  private String uploadFileName;

  public void setUpload(File upload) {
    this.upload = upload;
  }
  public void setUploadContentType(String uploadContentType) {
    this.uploadContentType = uploadContentType;
  }
  public void setUploadFileName(String uploadFileName) {
    this.uploadFileName = uploadFileName;
  }
  public File getUpload() {
    return this.upload;
  }
  public String getUploadContentType() {
    return this.uploadContentType;
  }
  public String getUploadFileName() {
    return this.uploadFileName;
  }
  @Override
  @Action("doUpload")
  public String execute()
  {
    System.out.println("Upload ok : " + (this.upload != null));
    return SUCCESS;
  }
}

我的问题是，只有当我不在操作类上设置任何拦截器时，它才有效。一旦我设置了拦截器，即使是像上面这样的 FileUploadInterceptor，该属性也不会被填充。

基本上，这有效：

public class UploadAction extends ActionSupport {...

但这不起作用：

@InterceptorRefs({
  @InterceptorRef("fileUpload")
})
public class UploadAction extends ActionSupport {...

或者

@InterceptorRefs({
  @InterceptorRef("fileUpload"),
  @InterceptorRef("myOtherinterceptor")
})
public class UploadAction extends ActionSupport {...

我发现！解决方案是：

@InterceptorRefs({
  @InterceptorRef("fileUpload"),
  @InterceptorRef("basicStack")
})
public class UploadAction extends ActionSupport {...

Answer 1

如果设置任何拦截器，则必须设置所有拦截器。基本上，您关闭了除上传拦截器之外的所有内容，这不是您想要的。

如果您要手动配置拦截器，并且需要引用多个拦截器，请按照@InterceptorRefs“wrapper”注释2.x/docs/convention-plugin.html#ConventionPlugin-InterceptorRefannotation" rel="nofollow">InterceptorRef 文档。