正文分页(中英文截字)问题

最近在做WAP项目,碰到需要对正文进行分页的情况,难点是中英文混排情况下的截字问题。中英文混排时,在GBK编码下,英文占一个字符,中文占两个字符,截的时候容易出现从中文字的第二个字符开始截的情况,截出来的字就会出现乱码。以下贴代码,代码是遍历正文的每个字,边遍历边收集当前页显示内容,同时统计字符数。如果哪位大虾有更好的写法,欢迎留言。

import java.io.Serializable;
import java.io.UnsupportedEncodingException;
/**
* 正文分页类
* @author Sophie_Lin
*
*/
public class ContentPage implements Serializable {
   private static final long serialVersionUID = 1L;
   protected int pageNo;
   protected int pageSize; //正文显示字数(按中文显示字数算)
   protected String content;
   protected String contentDisp;
   protected int totalCount;
   protected int totalPages;
  
   public ContentPage( int pageNo, int pageSize,String content){
     this.pageNo = pageNo;
     this.pageSize = pageSize;
     this.content = content;
    
     int start = (pageNo-1)*pageSize*2;
     int i=0;
    StringBuilder sb = new StringBuilder();
     for( char c : this.content.toCharArray()){
       try {
         if(String.valueOf(c).getBytes( "GBK").length>1){
           //中文字,+2
          i+=2;
        } else{
          i++;
        }
      } catch (UnsupportedEncodingException e) {
         // TODO Auto-generated catch block
        e.printStackTrace();
      }
       if(i>start && i<=start+pageSize*2){
        sb.append(c);
      }
    }
     int totalPages = 0;
     if(i%(pageSize*2)==0){
      totalPages = i/(pageSize*2);
    } else{
      totalPages = i/(pageSize*2)+1;
    }
     this.setContentDisp(sb.toString());
     this.setTotalCount(i);
     this.setTotalPages(totalPages);
  }
   public int getPageNo() {
     return pageNo;
  }
   public void setPageNo( int pageNo) {
     this.pageNo = pageNo;
  }
   public int getPageSize() {
     return pageSize;
  }
   public void setPageSize( int pageSize) {
     this.pageSize = pageSize;
  }
   public String getContent() {
     return content;
  }
   public void setContent(String content) {
     this.content = content;
  }
   public String getContentDisp() {
     return contentDisp;
  }
   public void setContentDisp(String contentDisp) {
     this.contentDisp = contentDisp;
  }
   public int getTotalCount(){
     return totalCount;
  }

   public int getTotalPages() {
     return totalPages;
  }
   public void setTotalPages( int totalPages) {
     this.totalPages = totalPages;
  }
   public void setTotalCount( int totalCount) {
     this.totalCount = totalCount;
  }
}

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