/** * 截取字符串 len为字节长度 * @param str * @param len * @return * @throws UnsupportedEncodingException */ public static String getLimitLengthString( String str,int len){ try{ int counterOfDoubleByte = 0; byte[] b = str.getBytes("gb2312"); if(b.length <= len) return str; for(int i = 0; i < len; i++){ if(b[i] < 0) counterOfDoubleByte++; } if(counterOfDoubleByte % 2 == 0) return new String(b, 0, len, "gb2312"); else return new String(b, 0, len - 1, "gb2312"); }catch(Exception ex){ DBTools.error(ex); return ""; } }