乱码解决

public static String replaceCharacter (String str) {
  if(str == null){
         return "";
     }
  Matcher m  = Pattern.compile("<a\\s?[^>]+>", Pattern.CASE_INSENSITIVE).matcher(str);
  if(m.find()){
   str = m.replaceAll("<a>");
  }
     StringBuffer unicodeStr = new StringBuffer("");
     for(int i = 0; i < str.length(); i++){
         char uni = str.charAt(i);
         unicodeStr.append("&#").append((int)uni).append(";");
     }
     String result = unicodeStr.toString();
     result = result.replaceAll("&#60;&#98;&#114;&#62;", "<br>");
     result = result.replaceAll("&#60;&#98;&#114;&#47;&#62;", "<br/>");
     result = result.replaceAll("&#60;&#105;&#62;", "<i>");
     result = result.replaceAll("&#60;&#47;&#105;&#62;", "</i>");
     result = result.replaceAll("&#60;&#98;&#62;", "<b>");
     result = result.replaceAll("&#60;&#47;&#98;&#62;", "</b>");
     result = result.replaceAll("&#60;&#115;&#117;&#98;&#62;", "_{");
     result = result.replaceAll("&#60;&#47;&#115;&#117;&#98;&#62;", "}");
     result = result.replaceAll("&#60;&#115;&#117;&#112;&#62;", "^{");
     result = result.replaceAll("&#60;&#47;&#115;&#117;&#112;&#62;", "}");
     result = result.replaceAll("&#60;&#117;&#108;&#62;", "<ul>");
     result = result.replaceAll("&#60;&#47;&#117;&#108;&#62;", "</ul>");
     result = result.replaceAll("&#60;&#108;&#105;&#62;", "<li>");
     result = result.replaceAll("&#60;&#47;&#108;&#105;&#62;", "</li>");
     result = result.replaceAll("&#60;&#104;&#53;&#62;", "<h5>");
     result = result.replaceAll("&#60;&#47;&#104;&#53;&#62;", "</h5>");
     result = result.replaceAll("&#60;&#47;&#97;&#62;", "</a>");
     result = result.replaceAll("&#60;&#97;&#62;", "<a>");
  return result;
 }