lyyb2001

package net.skycity.util;
public class StringUtils extends org.apache.commons.lang.StringUtils{

    public static String test(String str,int num){
     char[] cs = str.toCharArray();
     int count=0;
     int last = cs.length;
     for(int i=0;i<cs.length;i++){
      if(cs[i]>255)
       count+=2;
      else
       count++;
      if(count>num){
       last=i+1;
       break;
      }
     }
     if(count<num)
      return str;
     num -= 3;
        for(int i=last-1; i>=0; i--) {
            if(cs[i]>255)
                count-=2;
            else
                count--;
            if(count<=num) {
                return str.substring(0, i) + "...";
            }
        }
     return "...";
    }
}
jsp调用如下:
%@page import="net.skycity.util.StringUtils"%
<%=StringUtils.test("截取指定字符串长度测试",10)%>

Lyyb2001