长的字符串变成短的字符串

jiang — Sun, 04 May 2008 07:41:00 GMT

把一个长的字符串变成短的字符串,并且在每一行末尾加入 \n

/**
     * 计算字符串的 ascii 码长度
     *
     * @param s
     * @return
     */
    public int strLength(String s) {
        int result = 0;
        for (int i = 0; i < s.length(); i++) {
            if (isDoublebyteWord(s.substring(i, i + 1))) {
                result += 2;
            } else {
                result += 1;
            }
        }
        return result;
    }

    /**
     * 判断是否双字节字符
     *
     * @param str
     * @return
     */
    public boolean isDoublebyteWord(String str) {
        System.out.println(str);
        byte[] b;
        int temp;
        for (int i = 0; i < str.length(); i++) {
            b = str.substring(i, i + 1).getBytes();
            temp = b[0];
            if (temp > 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * 公割字符串
     * @param s 字符串
     * @param len 一小段的长度
     * @return
     */
    public static String changeString(String s, int len) {

        LongStringToShort lts=new LongStringToShort();

        String result = "";
        len = (int) len / 8;
        int totalLen = lts.strLength(s);
        // 错误调用
        if (s.length() < 1 || len < 1)
            return "";
        // 只有一小段,不分割
        if (totalLen < len)
            return s;

        // 计算该字符串应该分几段
        int num = (int) totalLen / len;
        if (((float) totalLen / len) > num)
            num++;
        System.out.println("应该分" + num + "段" + len);
        int sl = 0;
        for (int i = 0; i < s.length(); i++) {
            String temp = s.substring(i, i + 1);
            if (lts.isDoublebyteWord(temp)) {
                sl += 2;
            } else {
                sl += 1;
            }
            result += temp;

            if (sl > (len - 1)) {
                System.out.println("hello");
                sl = 0;
                result += "\n";
                continue;
            }
        }
        return result;
    }

jiang 2008-05-04 15:41 发表评论

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长的字符串变成短的字符串