在Java中使用Jsoup在多个标签中替换HTML中的文本

Question

I am reading a HTML file line by line using java. Consider i am having a HTML line

<p> Hi everyone. This is a <em>dead end.</em> Do not go!</p>

I want to change the text in the line to

<p> Hi everyone. This is not a <em>dead end.</em>You may go!</p>

The Inputs will be given as

• Change From: This is a dead end. Do not go! This is a dead end. Do not go!
• Change To: This is not a dead end. You may go! This is not a dead end. You may go!

How can i do this without disturbing the HTML tags using Jsoup in Java or any other methods in java. Please help

Answer 1

As an alternative to MCL 's solution, here a fully Jsoup based one:

First, here's how Jsoup see's your html:

org.jsoup.nodes.TextNode:    Hi everyone. This is a 
org.jsoup.nodes.Element:    <em>dead end.</em>
org.jsoup.nodes.TextNode:    Do not go!

All three nodes are children of the <p>...</p> element.

And here's the (very verbose) code:

final String html = "<p> Hi everyone. This is a <em>dead end.</em> Do not go!</p>";

Document doc = Jsoup.parseBodyFragment(html); // Parse html into a document
Element pTag = doc.select("p").first(); // Select the p-element (there's just one)


// Text before 'em'-tag
TextNode preEM = (TextNode) pTag.childNode(0);
preEM.text(preEM.text().replace("This is a", "This is not a"));

// Text after 'em'-tag
TextNode postEM = (TextNode) pTag.childNode(2);
postEM.text("You may go!");


System.out.println(pTag); // Print result

Output:

<p> Hi everyone. This is not a <em>dead end.</em>You may go!</p>

This will keep all html formatting and / or will work in full documents.