问题

我有一个页面，页面上有一个按钮，用于以CSV文件格式下载信息。单击该按钮会打开一个确认对话框以下载文件。我需要将该文件存储到临时位置（无论是存储在内存中还是保存到实际文件，然后在删除之后），然后将CSV中的数据读取到一个数组中。

我尝试过以下问题中的代码（[问题1](https://stackoverflow.com/questions/12997871/download-file-using-htmlunit)，[问题2](https://stackoverflow.com/questions/8049947/htmlunit-cant-retrieve-page-after-downloading-a-file?rq=1)，[问题3](https://stackoverflow.com/questions/25136439/htmlunit-download-file)和[问题4](https://stackoverflow.com/questions/46058444/htmlunit-set-download-location)），但这并不完全符合我的需求 - 主要是因为它们没有下载CSV文件并使用其中的数据。

我不确定确认对话框是否已被打开，但我确实添加了一个返回`true`的`ConfirmHandler`来尝试下载文件。然而，如果文件被下载了，我不知道它下载到哪里。

以下是我的操作步骤以及遇到问题的地方：

我可以成功登录。我进入一个报表生成器。我生成一个在新窗口中打开的报表。新窗口成功打开，并且我使用`WebWindowListener`捕获它。然后，我在新窗口中搜索“另存为CSV”按钮。我可以找到该按钮，并且可以单击它，但是通过`System.out.print`的调用显示`ConfirmHandler`没有触发。

```java
for (DomElement e : newPage.getElementsByTagName("button")) {
	int i = 0;
	webClient.setConfirmHandler(new ConfirmHandler() {
		private static final long serialVersionUID = 1L;
		@Override
		public boolean handleConfirm(Page arg0, String arg1) {
			System.out.println("Test"); //未触发
			return false;
		}
	});
	if (((HtmlButton) e).getAttribute("onclick").contains("CSV")) {
		((HtmlButton) e).click();
	} else {
		if (i++ == (newPage.getElementsByTagName("button").size() - 1)) throw new AssertionError("CSV按钮未找到");
	}
}

<details>
<summary>英文:</summary>
I have a page that has a button to download information in the format of a CSV file. The button opens a confirm dialog to download the file. I need to store that file to a temporary location (whether that be memory or saving to an actual file and then deleting it after) and then read the data in the CSV to an array.
I&#39;ve tried the code in these questions ([question 1](https://stackoverflow.com/questions/12997871/download-file-using-htmlunit), [question 2](https://stackoverflow.com/questions/8049947/htmlunit-cant-retrieve-page-after-downloading-a-file?rq=1), [question 3](https://stackoverflow.com/questions/25136439/htmlunit-download-file), and [question 4](https://stackoverflow.com/questions/46058444/htmlunit-set-download-location)), and it&#39;s not quite what I need - mostly because they weren&#39;t downloading a CSV and using the data in it.
I&#39;m not sure that the ConfirmDialog is being opened, but I did add a `ConfirmHandler` returning `true` to attempt to download the file. However, I don&#39;t know where the file is downloading if it is at all.
Here&#39;s what I have happening and where I get stuck:
I log in just fine. I go to a report generator. I generate a report that opens in a new window. The new window opens fine and I catch it with a `WebWindowListener`. I then search for the &quot;save as CSV&quot; button on the new window. I can find that, and I can click on it, but a `System.out.print` call shows that the `ConfirmHandler` isn&#39;t firing.

for (DomElement e : newPage.getElementsByTagName("button")) {
int i = 0;
webClient.setConfirmHandler(new ConfirmHandler() {
private static final long serialVersionUID = 1L;
@Override
public boolean handleConfirm(Page arg0, String arg1) {
System.out.println("Test"); //isn't firing
return false;
}
});
if (((HtmlButton) e).getAttribute("onclick").contains("CSV")) {
((HtmlButton) e).click();
}else {
if (i++ == (newPage.getElementsByTagName("button").size() - 1)) throw new AssertionError("CSV button not found");
}
}

</details>
# 答案1
**得分**: 0
以下是翻译好的部分：
这个答案的灵感来自于[这个答案](https://stackoverflow.com/a/13021720/5900977)。
我真的想要获取CSV文件的信息，而不需要下载文件，所以我在我的`webWindowListener`的`webWindowContentChanged(arg0)`方法中，只是使用了`arg0.getWebWindow().getEnclosingPage().getWebResponse().getContentAsString()`，然后使用了`String.split()`几次以获取我想要的信息。
以下是代码示例，以便更清晰一些：
```java
webClient.addWebWindowListener(new WebWindowListener() {
@Override
public void webWindowContentChanged(WebWindowEvent arg0) {
if (CSVclicked) { // 当我点击下载按钮时设置为true...
String CSV = arg0.getWebWindow().getEnclosedPage().getWebResponse().getContentAsString();
// 进行一些操作...
CSVclicked = false; // 下次调用该方法时不要使用相同的行为...
}
}
});

webClient.addWebWindowListener(new WebWindowListener() {
@Override
public void webWindowContentChanged(WebWindowEvent arg0) {
if (CSVclicked) {			//boolean that is set true when I click the download button...
String CSV = arg0.getWebWindow().getEnclosedPage().getWebResponse().getContentAsString();
//do things...
CSVclicked = false; //don't use the same behavior next time the method is called...
}
}
});