JSoup按ID提取文本

Question

I want to extract the text "Inbox (100)" html by id enclosed within tags. 我想通过标签内包含的ID提取文本“ Inbox（100）” html。 My test case looks like this: 我的测试用例如下所示：

    String html = "<td id=\"e-mailoutline-row\" title=\"Inbox\" class=\"outline-text\">Inbox (100)</td>";

    Document doc = Jsoup.parse(html);
    Element numberofEmails = doc.getElementById("e-mailoutline-row");

The issue is that numberofEmails is always null, so I can't even get the text, let alone work towards the actuall number in the brackets. 问题是numberofEmails始终为null，所以我什至无法获取文本，更不用说计算括号中的实际数字了。

I also tried : 我也尝试过：

        String html = "<head><body><td id=\"e-mailoutline-row\" title=\"Inbox\" class=\"outline-text\">Inbox (100)</td></body?</head>";

Once I get the test case working I will use it to extract this text from a much larger document. 一旦测试用例能够正常工作，我将使用它从更大的文档中提取文本。

This should be simple. 这应该很简单。 What am I missing? 我想念什么？

Answer 1

The syntax of the commands was correct, but it appears JSoup is picky about the html being correctly formed. 这些命令的语法是正确的，但是JSoup似乎对正确形成html感到挑剔。 The following html test case worked exactly as intended: 以下html测试用例完全按预期工作：

String html = "<head><body><table><tr><td id=\"e-mailoutline-row\">Inbox (100)</td></tr></table></body></head>";

Note I had to add not only and but and too. 请注意，我不仅必须添加，而且还必须添加。 It did not work with head and body only added to the original test case. 仅将头和身体添加到原始测试用例中时，该方法不起作用。

Thanks to @soorapadman and @Yaroslav for pointing me in the right direction. 感谢@soorapadman和@Yaroslav为我指出正确的方向。

Answer 2

Jsoup always follows hierarchy. Jsoup始终遵循层次结构。 In order parse from td tag it should come from table->tr-->td 为了从td标签解析，它应该来自table->tr-->td

 String html = "<head><body><table><tr><td id=\"e-mailoutline-row\">Inbox (100)</td></tr></table></body></head>";
    Document doc = Jsoup.parse(html);
    Element numberofEmails = doc.getElementById("e-mailoutline-row");
    System.out.println(numberofEmails.text());

Output: 输出：

Inbox (100)

JSoup按ID提取文本

问题描述

2 个解决方案

解决方案1
0 2019-03-05 08:53:07

解决方案2
-1 2019-03-05 08:14:42

JSoup按ID提取文本

问题描述

2 个解决方案

解决方案1 0 2019-03-05 08:53:07

解决方案2 -1 2019-03-05 08:14:42

解决方案1
0 2019-03-05 08:53:07

解决方案2
-1 2019-03-05 08:14:42