/*  *    Copyright 2012-2013 The Haohui Network Corporation  */ package com.haohui.common.utils; /**  * <pre>  * 字符串辅助工具  * </pre>  *  * @project baidamei  * @author cevencheng <cevencheng@gmail.com>  * @create 2012-11-30 下午2:42:56  */ public class StringTool {  /**   *<b>截取指定字节长度的字符串，不能返回半个汉字</b>   * 例如：   * 如果网页最多能显示17个汉字，那么 length 则为 34   * StringTool.getSubString(str, 34);   *   * @param str   * @param length   * @return   */  public static String getSubString(String str, int length) {   int count = 0;   int offset = 0;   char[] c = str.toCharArray();   for (int i = 0; i < c.length; i++) {    if (c[i] > 256) {     offset = 2;     count += 2;    } else {     offset = 1;     count++;    }    if (count == length) {     return str.substring(0, i + 1);    }    if ((count == length + 1 && offset == 2)) {     return str.substring(0, i);    }   }   return "";  } }