Java HTML Encode HTMLEncode(String string)

Description

Encode a string to be displayed in HTML

If fullHTML encode, then all unicode characters above 7 bits are converted into HTML entitites

License

Apache License

Declaration

public static String HTMLEncode(String string) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    /**// w  ww . jav  a2  s.c om
     * Encode a string to be displayed in HTML
     * <p/>
     * If fullHTML encode, then all unicode characters above 7 bits are converted into
     * HTML entitites
     */
    public static String HTMLEncode(String string) {
        return HTMLEncode(string, false);
    }

    public static String HTMLEncode(String string, boolean fullHTML) {
        if (string == null)
            return null;
        if (string.length() == 0)
            return string;
        StringBuffer sb = new StringBuffer(string.length());
        // true if last char was blank
        boolean lastWasBlankChar = false;
        int len = string.length();
        char c;

        for (int i = 0; i < len; i++) {
            c = string.charAt(i);
            if (c == ' ') {
                // blank gets extra work,
                // this solves the problem you get if you replace all
                // blanks with &nbsp;, if you do that you loss
                // word breaking
                if (lastWasBlankChar) {
                    lastWasBlankChar = false;
                    //sb.append("&nbsp;");
                } else {
                    lastWasBlankChar = true;
                    sb.append(' ');
                }
            } else {
                lastWasBlankChar = false;
                //
                // HTML Special Chars
                if (c == '"')
                    sb.append("&quot;");
                else if (c == '\'')
                    sb.append("&apos;");
                else if (c == '&') {
                    boolean skip = false;
                    // we don't want to recode an existing hmlt entity
                    if (string.length() > i + 3) {
                        char c2 = string.charAt(i + 1);
                        char c3 = string.charAt(i + 2);
                        char c4 = string.charAt(i + 3);
                        if (c2 == 'a') {
                            if (c3 == 'm') {
                                if (c4 == 'p') {
                                    if (string.length() > i + 4) {
                                        char c5 = string.charAt(i + 4);
                                        if (c5 == ';') {
                                            skip = true;
                                        }
                                    }
                                }
                            }
                        } else if (c2 == 'q') {
                            if (c3 == 'u') {
                                if (c4 == 'o') {
                                    if (string.length() > i + 5) {
                                        char c5 = string.charAt(i + 4);
                                        char c6 = string.charAt(i + 5);
                                        if (c5 == 't') {
                                            if (c6 == ';') {
                                                skip = true;
                                            }
                                        }
                                    }
                                }
                            }
                        } else if (c2 == 'l' || c2 == 'g') {
                            if (c3 == 't') {
                                if (c4 == ';') {
                                    skip = true;
                                }
                            }
                        }
                    }
                    if (!skip) {
                        sb.append("&amp;");
                    } else {
                        sb.append("&");
                    }
                } else if (c == '<')
                    sb.append("&lt;");
                else if (c == '>')
                    sb.append("&gt;");
                /*else if (c == '\n') {
                 // warning: this can be too much html!
                 sb.append("&lt;br/&gt;");
                 }*/
                else {
                    int ci = 0xffff & c;
                    if (ci < 160) {
                        // nothing special only 7 Bit
                        sb.append(c);
                    } else {
                        if (fullHTML) {
                            // Not 7 Bit use the unicode system
                            sb.append("&#");
                            sb.append(new Integer(ci).toString());
                            sb.append(';');
                        } else
                            sb.append(c);
                    }
                }
            }
        }
        return sb.toString();
    }
}

Related

1. htmlEncode(String str)
2. htmlEncode(String str)
3. htmlEncode(String str)
4. htmlEncode(String str)
5. htmlEncode(String string)
6. htmlEncode(String string)
7. HtmlEncode(String strInput)
8. htmlEncode(String strSrc)
9. htmlEncode(String strSrc)