检测密码强度工具类

package com.lxm.tools;

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;

}

}