Escape HTML Characters in Groovy

To escape HTML characters in Groovy, you can use the StringEscapeUtils.escapeHtml() method from the org.apache.commons.lang3 library. Here's an example:

Escape HTML Characters in Groovy using StringEscapeUtils Example

import org.apache.commons.lang3.StringEscapeUtils

def str = "<p>Hello world!</p>"
def escapedStr = StringEscapeUtils.escapeHtml(str)
println escapedStr

This code escapes the HTML characters in the string str. The output will be:

<p>Hello world!</p>

Here's another example that shows how to escape multiple HTML characters in a string:

import org.apache.commons.lang3.StringEscapeUtils

def str = "<p>Hello world!</p> <a href='https://example.com'>Visit example.com</a>"
def escapedStr = StringEscapeUtils.escapeHtml(str)
println escapedStr

In this code, we escape all the HTML characters in the string str, including the <p>, </p>, <a>, and </a> tags, as well as the ' character in the URL. The output will be:

<p>Hello world!</p> <a href='https://example.com'>Visit example.com</a>

Note that the ' character in the URL is escaped as '. This is because the escapeHtml() method uses the XML entities for escaping HTML characters.

Escaping HTML Characters using replaceAll Function in Groovy

To escape a string in Groovy without using StringEscapeUtils, you can use the replaceAll() method and specify the characters you want to escape. Here's an example that shows how to escape HTML characters:

def str = "<p>Hello world!</p>"
def escapedStr = str.replaceAll("<", "&lt;").replaceAll(">", "&gt;")
println escapedStr

This code replaces the < and > characters with the corresponding XML entities < and >, respectively. The output will be:

<p>Hello world!</p>

Here's another example that shows how to escape multiple HTML characters in a string:

def str = "<p>Hello world!</p> <a href='https://example.com'>Visit example.com</a>"
def escapedStr = str
  .replaceAll("<", "&lt;")
  .replaceAll(">", "&gt;")
  .replaceAll("'", "&apos;")
  .replaceAll('"', "&quot;")
println escapedStr

In this code, we replace the <, >, ', and " characters with the corresponding XML entities <, >, ', and ", respectively. The output will be:

<p>Hello world!</p> <a href='https://example.com'>Visit example.com</a>

To escape HTML characters online, use this tool.

Related:

1. Check if String is Empty in Groovy
2. Check if Variable is Null in Groovy
3. Check if String Contains a Substring in Groovy