JAVA中按字节截取字符串

21
Sep

JAVA中按字节截取字符串

Java学习专题Sep 21st, 2008binyan17

/**
   * 按字节长度截取字符串
   * @param str 将要截取的字符串参数
   * @param toCount 截取的字节长度
   * @param more 字符串末尾补上的字符串
   * @return 返回截取后的字符串
   */
  public String substring(String str, int toCount, String more){
    int reInt = 0;
    String reStr = "";
    if (str == null)
      return "";
    char[] tempChar = str.toCharArray();
    for (int kk = 0; (kk < tempChar.length && toCount > reInt); kk++) {
      String s1 = str.valueOf(tempChar[kk]);
      byte[] b = s1.getBytes();
      reInt += b.length;
      reStr += tempChar[kk];
    }
    if (toCount == reInt || (toCount == reInt - 1))
      reStr += more;
    return reStr;
  }