stringutil.java

hibernate+spring的相片上传项目

  }

  /**
   *指定字符串替换
   * @param line  串值字符
   * @param oldStr 要替换的串值
   * @param newStr 目标串值
   * @return 返回替换后的字符串
   * @throws java.lang.Exception
   */
  public static String replace(
      String mainString,
      String oldString,
      String newString)
  {
    if (mainString == null)
    {
      return null;
    }
    int i = mainString.lastIndexOf(oldString);
    if (i < 0)
    {
      return mainString;
    }
    StringBuffer mainSb = new StringBuffer(mainString);
    while (i >= 0)
    {
      mainSb.replace(i, i + oldString.length(), newString);
      i = mainString.lastIndexOf(oldString, i - 1);
    }
    return mainSb.toString();
  }

  /**
   *指定字符串替换 [张科专用..倒哟]
   * @param line  串值字符
   * @param oldStr 要替换的串值
   * @param newStr 目标串值
   * @return 返回替换后的字符串
   * @throws java.lang.Exception
   */
  public static String replace1(
      String mainString,
      String oldString,
      String newString)
  {
    if (mainString == null)
    {
      return null;
    }
    int i = mainString.lastIndexOf(oldString);
    if (i < 0)
    {
      return mainString;
    }
    StringBuffer mainSb = new StringBuffer(mainString);
    while (i >= 0)
    {
      mainSb.replace(i, i + oldString.length(), newString);
      i = mainString.lastIndexOf(oldString, i - 1);
    }
    return mainSb.toString();
  }

  /**
   * Check a string null or blank.
   * @param param string to check
   * @return boolean
   */
  public static boolean nullOrBlank(String param)
  {
    return (param == null || param.trim().equals("")) ? true : false;
  }

  public static String notNull(String param)
  {
    return param == null ? "" : param.trim();
  }

  /**
   * Parse a string to int.
   * @param param string to parse
   * @return int value, on exception return 0.
   */
  public static int parseInt(String param)
  {
    int i = 0;
    try
    {
      i = Integer.parseInt(param);
    }
    catch (Exception e)
    {
      i = (int) parseFloat(param);
      e.printStackTrace();
    }
    return i;
  }

  public static long parseLong(String param)
  {
    long l = 0;
    try
    {
      l = Long.parseLong(param);
    }
    catch (Exception e)
    {
      l = (long) parseDouble(param);
    }
    return l;
  }

  public static float parseFloat(String param)
  {
    float f = 0;
    try
    {
      f = Float.parseFloat(param);
    }
    catch (Exception e)
    {
      //
    }
    return f;
  }

  public static double parseDouble(String param)
  {
    double d = 0;
    try
    {
      d = Double.parseDouble(param);
    }
    catch (Exception e)
    {
      //
    }
    return d;
  }

  /**
   * Parse a string to boolean.
   * @param param string to parse
   * @return boolean value, if param begin with(1,y,Y,t,T) return true,
   * on exception return false.
   */
  public static boolean parseBoolean(String param)
  {
    if (nullOrBlank(param))
    {
      return false;
    }
    switch (param.charAt(0))
    {
      case '1':
      case 'y':
      case 'Y':
      case 't':
      case 'T':
        return true;
    }
    return false;
  }

  /**
   * Convert URL .
   * @param input string to convert
   * @return string
   */
  public static String convertURL(String input)
  {
    if (input == null || input.length() == 0)
    {
      return input;
    }
    StringBuffer buf = new StringBuffer(input.length() + 25);
    char chars[] = input.toCharArray();
    int len = input.length();
    int index = -1;
    int i = 0;
    int j = 0;
    int oldend = 0;
    while (++index < len)
    {
      char cur = chars[i = index];
      j = -1;
      if ( (cur == 'f'
            && index < len - 6
            && chars[++i] == 't'
            && chars[++i] == 'p'
            || cur == 'h'
            && (i = index) < len - 7
            && chars[++i] == 't'
            && chars[++i] == 't'
            && chars[++i] == 'p'
            && (chars[++i] == 's' || chars[--i] == 'p'))
          && i < len - 4
          && chars[++i] == ':'
          && chars[++i] == '/'
          && chars[++i] == '/')
      {
        j = ++i;
      }
      if (j > 0)
      {
        if (index == 0
            || (cur = chars[index - 1]) != '\''
            && cur != '"'
            && cur != '<'
            && cur != '=')
        {
          cur = chars[j];
          while (j < len)
          {
            if (cur == ' '
                || cur == '\t'
                || cur == '\''
                || cur == '"'
                || cur == '<'
                || cur == '['
                || cur == '\n'
                || cur == '\r'
                && j < len - 1
                && chars[j + 1] == '\n')
            {
              break;
            }
            if (++j < len)
            {
              cur = chars[j];
            }
          }
          cur = chars[j - 1];
          if (cur == '.' || cur == ',' || cur == ')' || cur == ']')
          {
            j--;
          }
          buf.append(chars, oldend, index - oldend);
          buf.append("<a href=\"");
          buf.append(chars, index, j - index);
          buf.append('"');
          buf.append(" target=\"_blank\"");
          buf.append('>');
          buf.append(chars, index, j - index);
          buf.append("</a>");
        }
        else
        {
          buf.append(chars, oldend, j - oldend);
        }
        oldend = index = j;
      }
      else
      if (cur == '[' && index < len - 6 && chars[i =
          index + 1] == 'u'
          && chars[++i] == 'r'
          && chars[++i] == 'l'
          && (chars[++i] == '=' || chars[i] == ' '))
      {
        j = ++i;
        int u2;
        int u1 = u2 = input.indexOf("]", j);
        if (u1 > 0)
        {
          u2 = input.indexOf("[/url]", u1 + 1);
        }
        if (u2 < 0)
        {
          buf.append(chars, oldend, j - oldend);
          oldend = j;
        }
        else
        {
          buf.append(chars, oldend, index - oldend);
          buf.append("<a href =\"");
          String href = input.substring(j, u1).trim();
          if (href.indexOf("javascript:") == -1
              && href.indexOf("file:") == -1)
          {
            buf.append(href);
          }
          buf.append("\" target=\"_blank");
          buf.append("\">");
          buf.append(input.substring(u1 + 1, u2).trim());
          buf.append("</a>");
          oldend = u2 + 6;
        }
        index = oldend;
      }
    }
    if (oldend < len)
    {
      buf.append(chars, oldend, len - oldend);
    }
    return buf.toString();
  }

  /**
   * Display a string in html page, call methods: escapeHTMLTags, convertURL,
   *  convertNewlines.
   * @param input string to display
   * @return string
   */
  public static String dspHtml(String input)
  {
    String str = input;
    if (str == null)
    {
      return "&nbsp";
    }
    str = createBreaks(str, 80);
    str = escapeHTMLTags(str);
    str = convertURL(str);
    str = convertNewlines(str);
    return str;
  }

  /**
   *
   * @param c
   * @return is letter
   */
  public static boolean isLeter(char c)
  {
    return Character.isLetter(c);
  }

  /**
   *
   * @param c
   * @return is digit
   */
  public static boolean isDigit(char c)
  {
    return Character.isDigit(c);
  }

  public static String getMD5(String text)
  {
    String key = "0123456789";
    try
    {
      MessageDigest md = MessageDigest.getInstance("MD5");
      md.update(text.getBytes());
      md.update(key.getBytes());
      ByteArrayInputStream bs = new ByteArrayInputStream(md.digest());
      StringWriter sw = new StringWriter();
      for (int i = 0; i < 16; i++)
      {
        String bt = Integer.toHexString(bs.read());
        if (bt.length() < 2)
        {
          sw.write("0" + bt);
        }
        else
        {
          sw.write(bt);
        }
      }
      String r = sw.toString();
      bs.close();
      sw.close();
      return r;
    }
    catch (Exception e)
    {
      return "";
    }
  }

  public static String replaceAll(String src, String str)
  {
    StringBuffer s = new StringBuffer(src);
    for (int i = 0; i < s.length(); i++)
    {
      if (s.charAt(i) == '\'')
      {
        s.replace(i, i + 1, str);
        i += str.length() - 1;
      }
    }
    return s.toString();
  }

  /**
   * 对要写入数据库的字符串内容进行安全替换（字符串内容可还原）
   * @param line 要进行安全替换的字符串
   * @return 返回安全的字符串
   * @throws java.lang.Exception
   */
  public String str2db(String line)   //写入
      throws Exception
  {
    line = replace(line, "'", "THE_POINT");
    line = replace(line, "，", "THE_COMMA1");
    line = replace(line, ",", "THE_COMMA2");
    line = replace(line, ";", "THE_FH1");
    line = replace(line, "(", "THE_ZK");
    line = replace(line, ")", "THE_YK");
    line = replace(line, "「", "THE_FZ");
    line = replace(line, "」", "THE_FY");
//    db db=new db();
//    line = db.sword(line);
//    this.toUnicode(line,"gbk");
    return line;
  }

  /**
   * 把从数据库内要输出到页面的字符串进行安全还原
   * @param line 要进行还原的字符串
   * @return 返回原始字符串
   * @throws java.lang.Exception
   */
  public static String db2str(String line) //读取
      throws Exception
  {
    line = replace(line, "THE_POINT", "'");
    line = replace(line, "THE_COMMA1", ",");
    line = replace(line, "THE_COMMA2", "，");
    line = replace(line, "THE_FH1", ";");
    line = replace(line, "THE_ZK", "(");
    line = replace(line, "THE_YK", ")");
    line = replace(line, "THE_FZ", "「");