Java HTML to String htmlToText(String input)

Description

Converts HTML to plain text, according to the following rules:

• Replaces any newlines or carriage returns in the source text with single spaces.

  License

  Apache License

  Declaration

  public static String htmlToText(String input) 
  

  Method Source Code

  //package com.java2s;
  // Licensed under the Apache License, Version 2.0 (the "License");
  
  public class Main {
      /**/*from  w  w w  . j a  v a 2s  . c  o m*/
       *  Converts HTML to plain text, according to the following rules:
       *  <ul>
       *  <li> Replaces any newlines or carriage returns in the source text with single spaces.
       *  <li> Replaces <code>&lt;P&gt;</code> and <code>&lt;BR&gt;</code> with newlines.
       *  <li> Replaces <code>&lt;LI&gt;</code> with newline followed by "* ".
       *  <li> Removes all other tags, including their attributes.
       *  <li> Leaves text behind.
       *  </ul>
       *
       *  @since 1.0.2
       */
      public static String htmlToText(String input) {
          if (input == null)
              input = "";
  
          input = input.replaceAll("[\r\n]+", " ");
  
          StringBuilder buf = new StringBuilder(input.trim());
          int openIdx = 0;
          while ((openIdx = buf.indexOf("<", openIdx)) >= 0) {
              int closeIdx = buf.indexOf(">", openIdx);
              if (closeIdx < 0) {
                  // punt on unclosed tag
                  buf.delete(openIdx, buf.length());
                  break;
              }
              String tag = buf.substring(openIdx + 1, closeIdx).trim().toUpperCase();
              buf.delete(openIdx, closeIdx + 1);
              tag = tag.replaceAll("\\s+.*", "");
              if (tag.equals("P") || tag.startsWith("BR"))
                  buf.insert(openIdx, "\n");
              else if (tag.equals("LI"))
                  buf.insert(openIdx, "\n* ");
          }
          return buf.toString();
      }
  }
  

  Related

  1. htmlToString(String aS_Text)
  2. htmlToString(String s)
  3. htmlToString(String string)
  4. htmlToText(String html)
  5. htmlToText(String html)
  6. htmlToText(String sHTML)
  7. toText(String html)
  8. toText(String html)
  9. toText(String text)