Tell me how to make an HTML parser of tables with output to a TXT file in JAVA.

Here is what I could do myself:

public class HTMLParser { public static void main(String[] args) throws IOException { File input = new File("d:/1/example.html"); org.jsoup.nodes.Document doc = Jsoup.parse(input, "UTF-8"); String file = doc.html(); String trLine = file.substring(file.indexOf("<tr>"),file.indexOf("</tr>")); int countTd = 2; int countTr = 0; String[] str = trLine.split(">*<"); for (String string : str){ if(string.contains("/td>")){ countTd++; } if(string.contains("colspan")){ countTd += Integer.parseInt(string.substring(string.indexOf("\"") +1, string.lastIndexOf("\""))) - 1; } } String[] str2 = file.split("<tr>"); for(String string : str2){ if(string.contains("</tr>")){ countTr++; } } countTr = countTr * 2 +1; String[][] table = new String[countTr][countTd]; for (int i = 0; i < countTr; i++){ table[i][0] = "*"; table[i][countTd-1] = "*"; } String[] lines = file.split("\n"); int y = 1; int x = 1; for(int i = 0; i < lines.length; i++){ if(lines[i].contains("<td>")){ for(int a = 0; a <countTd; a++ ){ if(table[y][x + a] == null ){ table[y][x] = lines[i].substring((lines[i].indexOf('>') + 1), lines[i].lastIndexOf("</td>") ); x++; a = countTd; } } } else if(lines[i].contains("colspan")){ int colspan = Integer.parseInt(lines[i].substring((lines[i].indexOf('\"') + 1),lines[i].lastIndexOf('\"'))); table[y][x] = lines[i].substring((lines[i].indexOf('>') + 1 ), lines[i].lastIndexOf('<') ); x+=colspan; } else if(lines[i].contains("</tr>")){ x = 1; y++; } else if(lines[i].contains("rowspan")){ int rowspan = Integer.parseInt(lines[i].substring((lines[i].indexOf('\"') + 1),lines[i].lastIndexOf('\"'))); table[y][x] = lines[i].substring((lines[i].indexOf('>') + 1 ), lines[i].lastIndexOf('<') ); for(int j = 1; j != rowspan; j++){ table[y+j][x] = " "; } x++; } } for(int i = 0; i<countTr; i++){ String s = ""; for(int j =0; j< countTd; j++){ s+=table[i][j]; } ConsoleHelper.println(s); } } }
  • and what does not work in your program? - Russtam
  • Incorrectly displayed table and nested problem. - user215185

1 answer 1

You are very strange to solve the problem. You used Jsoup only to get the same string that you passed to it. Then pull out the data with simple string methods, while it was necessary to continue using Jsoup.

You need to do something like this, fetching HTML code elements by the names of their tags:

 File input = new File("d:/1/example.html"); Document doc = Jsoup.parse(input, "UTF-8"); Elements trs = doc.getElementsByTag("tr"); for(Element tr : trs) { Elements tds = tr.getElementsByTag("td"); for(Element td : tds ) { String strInTd = td.text(); System.out.println(strInTd); } }
  • Thanks for the reply, Yuri. - user215185
  • But the problem is not even how to read the file, but how to display it in text format with the format preserved. - user215185
  • yadi.sk/i/Iu2Pi64ctJVP9 - user215185
  • @ user215185, no viewing rights. And explain about the "отобразить в текстовом виде с сохранением формата" - YuriySPb ♦
  • corrected the link - user215185