使用DigitMap进行字符串匹配-优快云博客

该博客介绍了一个名为DigitMap的类，用于处理特定格式的字符串匹配问题。它通过检查字符集、范围和特殊字符来判断目标字符串是否符合规则。示例中，DigitMap根据给定的规则对字符串'8234'进行匹配，返回匹配结果。

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public class DigitMap
{
	
	
	public String getDigitMapResult(String sdm, String destString){
		int startparenthesis = sdm.indexOf("(");
		int endparenthesis = sdm.indexOf(")");
		String sdms = sdm.substring(startparenthesis+1, endparenthesis);
		String[] sArr = sdms.split("\\|");
		char[] tb = destString.toCharArray();
		int tblength = tb.length;
		int matchCountPM = 0;
		int matchCountUM = 0;
		for (String string : sArr)
		{
			char[] carr = string.toCharArray();
			int clength = carr.length;
			int i,j;
			char[] preChar = new char[2];
			for(i = 0, j = 0; i < clength && j<tblength; i++,j++){
				if((carr[i]>='0'&&carr[i]<='9')||(carr[i]>='A'&&carr[i]<='K')){
					preChar[0] = preChar[1] = carr[i];
					if(!check(carr[i],tb[j])){
						break;
					}
				}else if (carr[i]=='[') {
					preChar[0] = carr[i+1];
					preChar[1] = carr[i+3];
					if(!check(carr[i+1], carr[i+3],tb[j])){
						break;
					}
					i+=4;
				}else if (carr[i]=='x') {
					preChar[0] = '0';
					preChar[1] = '9';
					if(!isDigit(tb[j])){
						break;
					}
				}else if (carr[i]=='.') {
					if(!check(preChar[0], preChar[1], tb[j])){
						break;
					}
				}else {
					break;
				}
			}
			
			if(j==tblength){
				if(clength!=j){
					matchCountPM++;
				}else if (clength==j) {
					matchCountUM++;
				}
			}else if (i==clength && j < tblength) {
				matchCountPM++;
			}
		}
		
		if((matchCountPM+matchCountUM)>1){
			return("{\""+destString+"\",\"FM\"}");
		}else if (matchCountUM==1) {
			return("{\""+destString+"\",\"UM\"}");
		}else if (matchCountPM==1) {
			return("{\""+destString+"\",\"PM\"}");
		}else{
			return("有错");
		}
	}


	//是否是数字
	private boolean isDigit(char c)
	{
		return (c>='0'&&c<='9')?true:false;
	}

	//后者介于前两者之间
	private boolean check(char c, char d, char e)
	{
		return (e>=c&&e<=d)?true:false;
	}

	//两个字符是否相等
	private boolean check(char c, char d)
	{
		return c==d;
	}

	public static void main(String[] args)
	{
		DigitMap dm = new DigitMap();
		String sdm = "{ (0|00|[1-7]xxx|8xxx|8xxxxxxx|Fxxxxxxx|Exx|91xxxxxxxxxx|9011x.)}";
		System.out.println(dm.getDigitMapResult(sdm,"8234"));
	}