HTML to Text Converter. - Utility Tools / Softwares Source Code in Java

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Home » Java Home » Utility Tools / Softwares Home » HTML to Text Converter.

A D V E R T I S E M E N T

Title	HTML to Text Converter.
Author	Omindra Kumar Rana
Author Email	rana_omindra [at] yahoo.co.in
Description	This utility convert HTML code to text code.
Category	Java » Utility Tools / Softwares
Hits	410249
Code	Select and Copy the Code
import java.io.File; import java.io.FileInputStream; import java.io.Reader; import java.io.StringReader; import java.io.IOException; /** * Convert text/html into text/plain * * Auther: Omindra Kumar Rana * Email: [email protected] * * @version 1.0 $Date: May 10, 2005 $ / public class HTML2Text { boolean body_found = false; boolean in_body = false; boolean center = false; boolean pre = false; String href = ""; public String convert(String source) throws Exception { StringBuffer result = new StringBuffer(); StringBuffer result2 = new StringBuffer(); StringReader input = new StringReader(source); try { String text = null; int c = input.read(); while (c != -1) // Convert until EOF { text = ""; if (c == '<') // It's a tag!! { String CurrentTag = getTag(input); // Get the rest of the tag text = convertTag(CurrentTag); } else if (c == '&') { String specialchar = getSpecial(input); if (specialchar.equals("lt;") \|\| specialchar.equals("#60")) text = "<"; else if (specialchar.equals("gt;") \|\| specialchar.equals("#62")) text = ">"; else if (specialchar.equals("amp;") \|\| specialchar.equals("#38")) text = "&"; else if (specialchar.equals("nbsp;")) text = " "; else if (specialchar.equals("quot;") \|\| specialchar.equals("#34")) text = """; else if (specialchar.equals("copy;") \|\| specialchar.equals("#169")) text = "[Copyright]"; else if (specialchar.equals("reg;") \|\| specialchar.equals("#174")) text = "[Registered]"; else if (specialchar.equals("trade;") \|\| specialchar.equals("#153")) text = "[Trademark]"; else text = "&" + specialchar; } else if (!pre && Character.isWhitespace((char)c)) { StringBuffer s = in_body ? result : result2; if (s.length() > 0 && Character.isWhitespace(s.charAt(s.length()-1))) text = ""; else text = " "; } else { text = "" + (char)c; } StringBuffer s = in_body ? result : result2; s.append(text); c = input.read(); } } catch (Exception e) { input.close(); throw e; } StringBuffer s = body_found ? result : result2; return s.toString().trim(); } String getTag(Reader r) throws IOException { StringBuffer result = new StringBuffer(); int level = 1; result.append('<'); while (level > 0) { int c = r.read(); if (c == -1) break; // EOF result.append((char)c); if (c == '<') level++; else if (c == '>') level--; } return result.toString(); } String getSpecial(Reader r) throws IOException { StringBuffer result = new StringBuffer(); r.mark(1);//Mark the present position in the stream int c = r.read(); while (Character.isLetter((char)c)) { result.append((char)c); r.mark(1); c = r.read(); } if (c == ';') result.append(';'); else r.reset(); return result.toString(); } boolean isTag(String s1, String s2) { s1 = s1.toLowerCase(); String t1 = "<" + s2.toLowerCase() + ">"; String t2 = "<" + s2.toLowerCase() + " "; return s1.startsWith(t1) \|\| s1.startsWith(t2); } String convertTag(String t) throws IOException { String result = ""; if (isTag(t,"body")) { in_body = true; body_found = true; } else if (isTag(t,"/body")) { in_body = false; result = " "; } else if (isTag(t,"center")) { result = " "; center = true; } else if (isTag(t,"/center")) { result = " "; center = false; } else if (isTag(t,"pre")) { result = " "; pre = true; } else if (isTag(t,"/pre")) { result = " "; pre = false; } else if (isTag(t,"p")) result = " "; else if (isTag(t,"br")) result = " "; else if (isTag(t,"h1") \|\| isTag(t,"h2") \|\| isTag(t,"h3") \|\|isTag(t,"h4") \|\| isTag(t,"h5") \|\| isTag(t,"h6") \|\| isTag(t,"h7")) result = " "; else if (isTag(t,"/h1") \|\| isTag(t,"/h2") \|\| isTag(t,"/h3") \|\|isTag(t,"/h4") \|\| isTag(t,"/h5") \|\| isTag(t,"/h6") \|\| isTag(t,"/h7")) result = " "; else if (isTag(t,"/dl")) result = " "; else if (isTag(t,"dd")) result = " "; else if (isTag(t,"dt")) result = " "; else if (isTag(t,"li")) result = " * "; else if (isTag(t,"/ul")) result = " "; else if (isTag(t,"/ol")) result = " "; else if (isTag(t,"hr")) result = "_________________________________________ "; else if (isTag(t,"table")) result = " "; else if (isTag(t,"/table")) result = " "; else if (isTag(t,"form")) result = " "; else if (isTag(t,"/form")) result = " "; else if (isTag(t,"b")) result = ""; else if (isTag(t,"/b")) result = ""; else if (isTag(t,"i")) result = """; else if (isTag(t,"/i")) result = """; else if (isTag(t,"img")) { int idx = t.indexOf("alt=""); if (idx != -1) { idx += 5; int idx2 = t.indexOf(""",idx); result = t.substring(idx,idx2); } } else if (isTag(t,"a")) { int idx = t.indexOf("href=""); if (idx != -1) { idx += 6; int idx2 = t.indexOf(""",idx); href = t.substring(idx,idx2); } else { href = ""; } } else if (isTag(t,"/a")) { if (href.length() > 0) { result = " [ " + href + " ]"; href = ""; } } return result; } public static void main(String argv[]) throws Exception { FileInputStream fis = null; String s = null; try { File file; if (argv[0] != null) file = new File(argv[0]); else file = new File("html_test_file.html"); fis = new FileInputStream(file); byte buf[] = new byte[fis.available()]; //bytes that can be read from this file input stream without blocking fis.read(buf); fis.close(); fis = null; s = new String(buf); HTML2Text h = new HTML2Text(); System.out.println(h.convert(s)); } catch (Exception e) { if (fis != null) fis.close(); throw e; } } }

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