小编Def*_*ine的帖子

我尝试使用 NEST.JS 和 MULTER 制作一个简单的文件上传 REST 接口 - 但它不起作用。我能够将二进制文件debug.log发布到 URL，并且看到“Hello undefined”消息，但上传的文件既不是在给定文件夹上传中创建的，也不是因为扩展名不正确而被拒绝 - 根据文件过滤器。但是，没有显示任何异常或错误。

为什么 multer 不工作？为什么@Uploadedfile() 文件显示为未定义？

谢谢

import { Controller, Post, Request, UseInterceptors, FileInterceptor, UploadedFile, HttpCode, HttpException, HttpStatus } from '@nestjs/common';
import { diskStorage, File } from 'multer';

const path = require('path');

const myStorage = diskStorage({
    destination: function (req, file, callback) {
        callback(null, './uploads/');
    },
    limits: { fileSize: 1000000 },
    fileFilter: function (req, file, cb) {
        const extension = path.extname(file.originalname).toLowerCase()
        const mimetyp = …

我正在尝试使用 JavaFX 标签和组，通过鼠标拖动将它们移动到屏幕上。新节点从某些线程添加到动画组中。然而，有时我会突然看到以下异常 - 我假设，当某些节点重叠时。但我不知道问题是什么......因为我的代码不涉及。有谁知道这个异常和根本原因（使用JDK 1.8.0.-112）？谢谢

'JavaFX Application Thread' lambda$main$68 - Thread[JavaFX Application Thread,5,main] threw an uncaught exception: java.lang.ArrayIndexOutOfBoundsException: -1
    at java.util.ArrayList.elementData(ArrayList.java:418) ~[?:1.8.0_112]
    at java.util.ArrayList.get(ArrayList.java:431) ~[?:1.8.0_112]
    at com.sun.javafx.collections.ObservableListWrapper.get(ObservableListWrapper.java:89) ~[jfxrt.jar:?]
    at com.sun.javafx.collections.VetoableListDecorator.get(VetoableListDecorator.java:306) ~[jfxrt.jar:?]
    at javafx.scene.Parent.updateCachedBounds(Parent.java:1591) ~[jfxrt.jar:?]
    at javafx.scene.Parent.recomputeBounds(Parent.java:1535) ~[jfxrt.jar:?]
    at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388) ~[jfxrt.jar:?]
    at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078) ~[jfxrt.jar:?]
    at javafx.scene.Node.updateGeomBounds(Node.java:3579) ~[jfxrt.jar:?]
    at javafx.scene.Node.getGeomBounds(Node.java:3532) ~[jfxrt.jar:?]
    at javafx.scene.Node.getLocalBounds(Node.java:3480) ~[jfxrt.jar:?]
    at javafx.scene.Node.updateTxBounds(Node.java:3643) ~[jfxrt.jar:?]
    at javafx.scene.Node.getTransformedBounds(Node.java:3426) ~[jfxrt.jar:?]
    at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732) ~[jfxrt.jar:?]
    at javafx.scene.Parent.updateCachedBounds(Parent.java:1596) ~[jfxrt.jar:?]
    at javafx.scene.Parent.recomputeBounds(Parent.java:1535) ~[jfxrt.jar:?]
    at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388) ~[jfxrt.jar:?]
    at javafx.scene.Node.updateGeomBounds(Node.java:3579) ~[jfxrt.jar:?]
    at javafx.scene.Node.getGeomBounds(Node.java:3532) ~[jfxrt.jar:?]
    at javafx.scene.Node.getLocalBounds(Node.java:3480) ~[jfxrt.jar:?] …

我想根据节点的宽度订购随机数量的节点。但是我无法计算宽度的总和（使用它们的属性），我有以下示例代码-我无法得知其中一个属性的变化：

@Override
public void start(Stage arg0) throws Exception {
    List<SimpleIntegerProperty> l = IntStream.range(0, 10)
            .mapToObj(SimpleIntegerProperty::new)
            .collect(Collectors.toList());
    ObservableList<IntegerProperty> widthAr = FXCollections.observableArrayList();
    widthAr.addAll(l);

    IntegerBinding nextheight = Bindings.createIntegerBinding(() -> widthAr.stream()
            .mapToInt(IntegerProperty::get)
            .sum(), widthAr);

    nextheight.addListener((v, o, n) -> System.out.println("New value: " + v.getValue()));

    //Now change randomly one of the IntegerProperties 
    ScheduledExecutorService tfsqueryScheduler = Executors.newScheduledThreadPool(1);

    tfsqueryScheduler.scheduleAtFixedRate(() -> {
        System.out.println("Changing");
        int i = (int) Math.round(Math.random() * 9.4);
        SimpleIntegerProperty v = l.get(i);
        v.set(0);
    }, 0, 3, TimeUnit.SECONDS);

    System.out.println("Start...");
}

再也不会调用nextheight.addListener :( ...有什么想法吗？谢谢！