AnsjStringUtil去除html标记(非严格)

gistfile1.txt

public class AnsjStringUtil {

  private static int[] filter = new int[128];
	private static int[] filterEnd = new int[128];

	static {
		filter['<'] = Integer.MAX_VALUE/2;
		filterEnd['<'] = '>';
		
		filter['&'] = 10;
		filterEnd['&'] = ';';

		filter[';'] = -1;
		filter['\n'] = -1;
		
		filter['\r'] = -1;
		filter['\t'] = -1;
		filter[' '] = 1;
		filter['*'] = 1;
		filter['+'] = 1;
		filter['-'] = 1;
		filter['.'] = 1;
	}

	/**
	 * 去除html标签
	 * 
	 * @param input
	 * @return
	 */
	public static String rmHtmlTag(String input) {
		if (isBlank(input)) {
			return "";
		}
		int length = input.length();
		int tl = 0 ;
		StringBuilder sb = new StringBuilder();
		char c = 0 ; 
		for (int i = 0; i < length; i++) {
			c = input.charAt(i) ;
			
			if(c>127){
				sb.append(c) ;
				continue ;
			}
			
			switch (filter[c]) {
			case -1:
				break;
			case 0:
				sb.append(c) ;
				break;
			case 1:
				if(sb.length()>0&&sb.charAt(sb.length()-1)!=c)
					sb.append(c) ;
				do{
					i++ ;
				}while(i<length&&input.charAt(i)==c) ;
				
				if(i<length||input.charAt(length-1)!=c) 
					i-- ;
				break;
			default:
				tl = filter[c]+i ;
				int tempOff = i ;
				boolean flag = false ;
				char end = (char) filterEnd[c] ;
				for (i++; i<length&&i <tl; i++) {
					c = input.charAt(i) ;
					if(c>127)continue ;
					if(c==end){
						flag = true ;
						break ;
					}
				}
				if(!flag){
					i = tempOff ;
					sb.append(input.charAt(i)) ;
				}
				break;
			}
		}
		return sb.toString() ;
	}
	
	public static String replacetHtml(String input){
		return input.replaceAll("<[\\W\\w]*?>", "").replaceAll("(&nbsp;)|(")|(&)|(<)|(>)", "").replaceAll("(\\n)|(\\r\\n)"," ");

	}
	

	/**
	 * 判断字符串是否为空
	 * 
	 * @param cs
	 * @return
	 */
	public static boolean isBlank(CharSequence cs) {
		int strLen;
		if (cs == null || (strLen = cs.length()) == 0) {
			return true;
		}
		for (int i = 0; i < strLen; i++) {
			if (Character.isWhitespace(cs.charAt(i)) == false) {
				return false;
			}
		}
		return true;
	}

	/**
	 * 判断字符串是否不为空
	 * 
	 * @param cs
	 * @return
	 */
	public static boolean isNotBlank(CharSequence cs) {
		return !isBlank(cs);
		
	}
}