去哪儿网2015校招软件研发笔试题（杭州站）

 minLength可能是负数

	public static void main(String[] args) {
		System.out.println(padString("7", 3, '0'));
		System.out.println(padString("2012", 3, '0'));
	}
	
	
	static String padString(String string,int minLength,char padChar){
		int len = string.length();
		if(minLength<0 || minLength<len){
			return string;
		}
		StringBuffer sb = new StringBuffer();
		int pads = minLength - len;
		while(pads-->0){
			sb.append(padChar);
		}
		sb.append(string);
		return sb.toString();
	}

public static void main(String[] args) {
		System.out.println(parser("-name jack -age 20 -address \"HangZhou ZheDa Road\""));
		System.out.println(parser("    -name jack -age 20 -address \"HangZhou ZheDa Road\""));
		System.out.println(parser("-name    jack -age 20    -address \"HangZhou ZheDa Road\""));
		System.out.println(parser("-name jack -age 20 -address \"HangZhou ZheDa Road   \"   "));
	}
	
	static String parser(String str){
		String params[] = str.split("-");
		for(int i=0;i<params.length;i++){
			params[i]=params[i].trim();//去掉前后空格
			params[i]=params[i].replaceAll("\\s+", " ");//去掉中间空格
		}
		StringBuffer sb = new StringBuffer();
		sb.append("[");
		for(int i=0;i<params.length;i++){
			if(params[i].length()!=0 && !params[i].equals("")){
				sb.append("-");
				sb.append(params[i]);
				if(i!=params.length-1){
					sb.append(", ");
				}
			}
		}
		sb.append("]");
		return sb.toString();
	}

public static void main(String[] args) {
		System.out.println(dif("abcde","bcde"));
		System.out.println(dif("dabc","aabcef"));
		System.out.println(dif("abcdefe","aabcadef"));
	}

	static String dif(String str1, String str2) {
		int flag[] = new int[26];
		StringBuffer sb = new StringBuffer();
		str1 = str1.toLowerCase().trim();
		str2 = str2.toLowerCase().trim();
		for(int i=0;i<str1.length();i++){
			flag[str1.charAt(i)-'a']--;
		}
		for(int i=0;i<str2.length();i++){
			flag[str2.charAt(i)-'a']++;
		}
		for(int i=0;i<flag.length;i++){
//			System.out.println("flag["+i+"]="+flag[i]);
			if(flag[i]<0){
				int count = Math.abs(flag[i]);
				for(int j=0;j<count;j++){
					sb.append("-");
					sb.append((char)(i+'a'));
					sb.append(",");
				}
			}else if(flag[i]>0){
				for(int j=0;j<flag[i];j++){
					sb.append("+");
					sb.append((char)(i+'a'));
					sb.append(",");
				}
			}
		}
		if(sb.lastIndexOf(",")==sb.length()-1)
			sb.deleteCharAt(sb.length()-1);
		return sb.toString();
	}

去哪儿网2015校招软件研发笔试题（杭州站）

原文：http://blog.csdn.net/zheng0518/article/details/39529181