小编Unk*_*ist的帖子

我正在尝试构建我的第一个用于生产的Angular 6应用程序,并且构建大小约为1 MB.

由于缺乏经验,我很难估计它应该是多大,但对于相对较小的应用来说,1 MB似乎很大.

如何检查这样的问题？

问题：

我有一个拦截器：

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

  constructor(private injector: Injector, private router: Router) {
  }


  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

    const auth = this.injector.get(AuthenticationService);
    const authHeaders = auth.getAuthHeader();
    const authReq = request.clone({headers: authHeaders});

     return next.handle(authReq).do((event: HttpEvent<any>) => {
       if (event instanceof HttpResponse) {

       }
     }, (err: any) => {
       if (err instanceof HttpErrorResponse) {
         if (err.status === 403) {
           this.router.navigate(['login']);
         }
       }
     });
  }
}

它在 Angular 5 中很旧，但现在我已经迁移到 6 并且这不再起作用了。

它说 Observable 类型上不存在属性“do”。

我也试图从这个线程实现解决方案：LINK 没有工作。 …

我正在尝试动态创建和显示组件，我需要将一些数据传递给它，以便它知道要显示什么。

这是我的代码：

html部分：

<div class="basicContainer">
  <div class="projectsTreeContainer">


    <input type="text" id="searchWord" placeholder="Search through projects"/>

    <button (click)="loadAddProject()">Add new Project</button>

    <app-projects-tree (onLoadProjectDetails)="loadProjectDetails($event)"
                       (onLoadWpDetails)="loadWpDetails($event)"
                       (onSelectAndLoadJobDetails)="loadJobDetails($event)"></app-projects-tree>
  </div>

  <div class="infoContainer">
    <ng-container *ngComponentOutlet="details"></ng-container>
  </div>

</div>

成分：

export class ProjectsComponent implements OnInit {

  details: Component;
  private showWp: boolean;

  constructor() {
  }


  loadProjectDetails(project: BasicProject): void {
     this.details = new ProjectComponent(project);
  }

以及我想要动态创建和显示的组件：

export class ProjectComponent implements OnInit {

  project: Project;

  constructor(basicProject: BasicProject) {
    this.project = new Project();
    this.project.name = basicProject.name ;
  }

Ng 模块：

@NgModule({
  declarations: [
    AppComponent,
    NavbarComponent, …

我正在尝试使用org.apache.poi进行xls/xlsx处理.(Springboot)

我得到一个例外:

Caused by: java.lang.NoClassDefFoundError: org/apache/poi/poifs/filesystem/FileMagic
    at org.apache.poi.openxml4j.opc.internal.ZipHelper.openZipStream(ZipHelper.java:208)
    at org.apache.poi.openxml4j.opc.ZipPackage.<init>(ZipPackage.java:98)
    at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:324)
    at org.apache.poi.util.PackageHelper.open(PackageHelper.java:37)
    at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:295)
    at ua.siemens.dbtool.service.impl.ExcelServiceImpl.getTemplate(ExcelServiceImpl.java:159)
    at ua.siemens.dbtool.service.impl.ExcelServiceImpl.exportTimesheet(ExcelServiceImpl.java:69)
    at ua.siemens.dbtool.controller.TimesheetController.exportTimesheet(TimesheetController.java:126)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
    ... 89 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.poi.poifs.filesystem.FileMagic
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 108 common frames omitted

方法:

private XSSFWorkbook getTemplate() throws IOException, InvalidFormatException {

    ClassLoader classLoader = …