给定的字符串按着给定的截取长度截取

来源：互联网发布：金山软件电话会议编辑：程序博客网时间：2024/06/04 18:07

/**
     * 将给定的字符串按着给定的截取长度截取
     * <br>
     * 注意一个汉字占2个字节
     * @param str
     * @param subSLength
     * @return 截取后的字符串
     * @throws UnsupportedEncodingException
     */
    public static String subStr(String str, int subSLength)
    {
        if (str == null){
            return null;
        }else if(str.getBytes().length<=subSLength){
        return str;
        }else{
            int tempSubLength = subSLength;//截取字节数
            String subStr = str.substring(0, subSLength);//截取的子串
            int subStrByetsL;
   try {
    subStrByetsL = subStr.getBytes("GBK").length;
     // 说明截取的字符串中包含有汉字
             while (subStrByetsL > tempSubLength)
             {//截取子串的字节长度
                 subStr = str.substring(0, --subSLength);
                 subStrByetsL = subStr.getBytes("GBK").length;
             }
             return subStr;
   } catch (UnsupportedEncodingException e) {
    e.printStackTrace();
   }
        }
        return null;
    }

public static void main(String[] args){
System.out.println(subStr("ABC附近看到更多功夫",6));
}