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作者：point
原文：一个简单的密码生成器！2006-09-15 09:05/*用于生成对密码要求比较高的场合*/(http://cnpoint.com/framwwork/2006/1205/content_4687.htm)
一个简单的密码生成器！ 2006-09-15 09:05

/*用于生成对密码要求比较高的场合*/
import java.util.Random;

public class PasswordCreator {

 private static final char[] sChars = { '!', '@', '#', '$', '%', '^', '&',
   '*', '(', ')', '+', '-', '+', '_', '=', '<', '>', '?', ';', ':' };

 private static final char[] aChars = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
   'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
   'u', 'v', 'w', 'x', 'y', 'z' };

 private static final char[] AChars = { 'A', 'B', 'C', 'D', 'E', 'F', 'G',
   'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
   'U', 'V', 'W', 'X', 'Y', 'Z' };

 private static final char[] nChars = { '0', '1', '2', '3', '4', '5', '6',
   '7', '8', '9' };

 private static final Random RANDOM = new Random();

 private static final int MIN = 7;

 private static final int MAX = 11;

 /**
  * @param args
  */
 public static void main(String[] args) {
  int minlength = MIN;
  int maxlength = MAX;

  try {
   minlength = Integer.parseInt(args[0]);
   maxlength = Integer.parseInt(args[1]);
  } catch (Exception e) {
   System.err.println("默认最大长度为10，最短长度为7，如果需要调整请输入："
     + " PasswordCreator 最短长度值  最长长度值+1");
  }
  String result = createPassword(minlength, maxlength);
  System.out.println("以下是否是您需要的PassWord:");
  System.out.println(result);

 }

 public static String createPassword(int minLength, int maxLength) {
  String sStr = random(maxLength, sChars);
  String aStr = random(maxLength, aChars);
  String AStr = random(maxLength, AChars);
  String nStr = random(maxLength, nChars);
  String str = sStr + aStr + AStr + nStr;
  char[] lastChar = str.toCharArray();
  str = random(maxLength - 1, lastChar);

  // 最后密码的长度
  int length = minLength
    + (int) (Math.random() * (maxLength - minLength));
  str = str.substring(maxLength - length);
  if (str.charAt(0) == '(') {
   str = str.substring(1);
   str = aChars[(int) (Math.random() * aChars.length)] + str;
  }
  str = str + sChars[(int) (Math.random() * sChars.length)];
  return str;
 }

 public static String random(int count, String set) {
  /* 243 */return random(count, set.toCharArray());
 }

 public static String random(int count, char set[]) {
  /* 256 */return random(count, 0, set.length - 1, false, false, set);
 }

 public static String random(int count, int start, int end, boolean letters,
   boolean numbers, char set[]) {
  /* 200 */if (start == 0 && end == 0) {
   /* 201 */end = 122;
   /* 202 */start = 32;
   /* 203 */if (!letters && !numbers) {
    /* 204 */start = 0;
    /* 205 */end = 2147483647;
   }
  }
  /* 209 */StringBuffer buffer = new StringBuffer();
  /* 210 */int gap = end - start;
  /* 214 */while (count-- != 0) {
   char ch;
   /* 214 */if (set == null)
    /* 215 */ch = (char) (RANDOM.nextInt(gap) + start);
   /* 217 */else
    /* 217 */ch = set[RANDOM.nextInt(gap) + start];
   /* 219 */if (letters && numbers && Character.isLetterOrDigit(ch)
     || letters && Character.isLetter(ch) || numbers
     && Character.isDigit(ch) || !letters && !numbers)
    /* 225 */buffer.append(ch);
   /* 227 */els

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