Android密码强度监测工具类

import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class CheckPWD {
 
	public static Safelevel checkPasswordStrength(String c) {
		Safelevel d = Safelevel.WEAK;
		if (isEmptyPassword(c)) {
			return d;
		}
		if (isTooShort(c)) {
			d = Safelevel.WEAK;
		} else {
			if (hasNum(c) && hasLetter(c) && hasSymbol(c)) {
				d = Safelevel.SECURE;
			} else {
				if (hasNum(c) && hasLetter(c)) {
					d = Safelevel.STRONG;
				} else {
					if (hasNum(c) && hasSymbol(c)) {
						d = Safelevel.STRONG;
					} else {
						if (hasSymbol(c) && hasLetter(c)) {
							d = Safelevel.STRONG;
						} else {
							if (isAllNum(c) || isAllLetter(c) || isAllSymbol(c)) {
								d = Safelevel.WEAK;
							}
						}
					}
				}
			}
		}
		return d;
	}
 
	public enum Safelevel {
		WEAK, /* 弱 */
		STRONG, /* 强 */
		SECURE, /* 安全 */
	}
 
	public static boolean hasNum(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile(".*\\d+.*");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean hasSymbol(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile(".*[a-zA-Z0-9\\s<>;'\\\\]+.*");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean isAllSymbol(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile("^[a-zA-Z0-9\\s<>;'\\\\]+$");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean hasSpace(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile(".*\\s+.*");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean hasIllegalSymbol(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile(".*[\\s<>;'\\\\].*");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean hasLetter(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile(".*[a-zA-Z]+.*");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean isAllLetter(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile("^[a-zA-Z]+$");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	private static boolean isEmptyPassword(String b) {
		return (b == null || b.length() == 0);
	}
 
	private static boolean isTooShort(String b) {
		return b.length() < 6;
	}
 
	public static boolean isAllNum(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile("^\\d+$");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
	}

	public static boolean hasRepeat6Chars(String content) {
		boolean flag = false;
		Pattern p = Pattern.compile(".*([0-9a-zA-Z])\\1{5}.*");
		Matcher m = p.matcher(content);
		if (m.matches())
			flag = true;
		return flag;
 
	}
 
	public static boolean hasIncrease6Chars(String g) {
		if (g == null || g.length() < 6) {
			return false;
		}
		char h = g.charAt(0);
		char i = 1;
		char j = 1;
		for (j = 1; j < g.length(); j++) {
			char f = g.charAt(j);
			if (f == h + 1) {
				i++;
				if (i >= 6) {
					return true;
				}
			} else {
				i = 1;
			}
			h = f;
		}
		return false;
 
	}
 
	public static boolean hasDecrease6Chars(String g) {
		if (g == null || g.length() < 6) {
			return false;
		}
		char h = g.charAt(0);
		char i = 1;
		char j = 1;
		for (j = 1; j < g.length(); j++) {
			char f = g.charAt(j);
			if (f == h - 1) {
				i++;
				if (i >= 6) {
					return true;
				}
			} else {
				i = 1;
			}
			h = f;
		}
		return false;
	}
 
	public static boolean hasAllIncreaseChars(String g) {
		if (g == null) {
			return false;
		}
		int i = g.length();
		char h = g.charAt(0);
		char j = 1;
		char k = 1;
		for (k = 1; k < g.length(); k++) {
			char l = g.charAt(k);
			if (l == h + 1) {
				j++;
				if (j >= i) {
					return true;
				}
			} else {
				j = 1;
			}
			h = l;
		}
		return false;
 
	}
 
	public static boolean hasAllDecreaseChars(String g) {
		if (g == null) {
			return false;
		}
		int i = g.length();
		char h = g.charAt(0);
		char j = 1;
		char k = 1;
		for (k = 1; k < i; k++) {
			char l = g.charAt(k);
			if (l == h - 1) {
				j++;
				if (j >= i) {
					return true;
				}
			} else {
				j = 1;
			}
			h = l;
		}
		return false;
	}
	public static boolean isAllSameChars(String content) {
		if (content == null || content.length() < 2) {
			return false;
		}
		char h = content.charAt(0);
		char e = 1;
		for (e = 1; e < content.length(); e++) {
			char f = content.charAt(e);
			if (f != h) {
				return false;
			}
		}
		return true;
	}
}