仿Javaeye分页

感觉javaeye的分页非常的好,所以就仿写了一个类似功能的分页组件
截图:


代码:

package com.yeyong.ah.util;

import com.yeyong.ah.model.PageInfo;

public class BuildPageInfo {
  private static final long serialVersionUID = -6177964015900139500L;

  public static String build(PageInfo pageInfo, boolean showTotal) {
    int recordCount = pageInfo.getRecordCount();
    int pageCount = pageInfo.getPageCount();
    int recordPerPage = pageInfo.getRecordPerPage();
    int curPage = pageInfo.getCurPage();
    String url = pageInfo.getUrl();
    String parmPrefix = pageInfo.getParmPrefix();
    
    StringBuilder sb = new StringBuilder(200);
    sb.append("<div class='page'>").append("<ul>");
    if(showTotal) {
      sb.append("<li><a href='javascript:void(0)' class='pagetotal'>&nbsp;共");
      sb.append(recordCount).append("条&nbsp;</a></li>");
    }
    char split = url.indexOf('?') == -1 ? '?': '&';

    StringBuilder prefix = new StringBuilder(200);
    prefix.append("<li><a href='javascript:void(0)' onclick=\"window.location.href='");
    prefix.append(url).append(split).append(parmPrefix).append("page=");
    
    StringBuilder sizeAndTotal = new StringBuilder(200);
    sizeAndTotal.append('&').append(parmPrefix).append("pagesize=").append(recordPerPage);
    sizeAndTotal.append('&').append(parmPrefix).append("total=").append(recordCount);
    
    String suffix = "</a></li>";

    if (curPage > 1) {
      //sb.append(prefix).append(1).append(sizeAndTotal).append("'\" class='pre'>&nbsp;首页&nbsp;").append(suffix);
      sb.append(prefix).append(curPage - 1).append(sizeAndTotal).append("'\" class='pre'>?&nbsp;上一页&nbsp;").append(suffix);
    } else {
      //sb.append("<li><span class='disable'>&nbsp;首页&nbsp;</span></li>");
      sb.append("<li><span class='disable'>?&nbsp;上一页&nbsp;</span></li>");
    }
    int size = 3;
    if (pageCount <= size) {
      for (int i = 1; i <= pageCount; i++) {
        if (i!=curPage ) {
          sb.append(prefix).append(i).append(sizeAndTotal).append("'\" class='pageNo'>").append(i).append(suffix);
        } else {
          sb.append("<li><span class='curpageno'>").append(i).append("</span></li>");
        }
      }
    } else {
      if (curPage != 1) {
        sb.append(prefix).append(1).append(sizeAndTotal).append("'\" class='pageNo'>").append(1).append(suffix);
      } else {
        sb.append("<li><span class='curpageno'>").append(1).append("</span></li>");
      }
      int start = (curPage - 1) / size * size + 1;
      int end = pageCount > (start + size - 1 ) ? (start + size - 1) : pageCount;
      start = (start==1) ? 2 : start;
      for (int i = start; i <= end ; i++) {
        if (i!=curPage ) {
          sb.append(prefix).append(i).append(sizeAndTotal).append("'\" class='pageNo'>").append(i).append(suffix);
        } else {
          sb.append("<li><span class='curpageno'>").append(i).append("</span></li>");
        }
      }
      if (end < pageCount) {
        boolean hasPutDot = false;
        hasPutDot = addQuickPage(sb, prefix, sizeAndTotal, suffix, curPage, pageCount, 0, 30, 70, 200000, 50, hasPutDot);
        hasPutDot = addQuickPage(sb, prefix, sizeAndTotal, suffix, curPage, pageCount, 0, 300, 700, 10000, 500, hasPutDot);
        hasPutDot = addQuickPage(sb, prefix, sizeAndTotal, suffix, curPage, pageCount, 200, 1000, 3000,20000, 2000, hasPutDot);
        hasPutDot = addQuickPage(sb, prefix, sizeAndTotal, suffix, curPage, pageCount, 1000, 3000, 7000, 30000, 5000, hasPutDot);
        hasPutDot = addQuickPage(sb, prefix, sizeAndTotal, suffix, curPage, pageCount, 3000, 7000, 20000, 100000, 50000, hasPutDot);
        sb.append("<li><a href='javascript:void(0)' class='pageNo'>..</a></li>");
        start = end < pageCount - 2 ? pageCount-1:pageCount;
        for (int j = start; j <= pageCount ; j++) {
          sb.append(prefix).append(j).append(sizeAndTotal).append("'\" class='pageNo'>").append(j).append(suffix);
        }        
      }
    }
    if (curPage < pageCount) {
      sb.append(prefix).append(curPage + 1).append(sizeAndTotal).append("'\" class='nxt'>&nbsp;下一页&nbsp;?").append(suffix);
      //sb.append(prefix).append(pageCount).append(sizeAndTotal).append("'\" class='nxt'>&nbsp;尾页&nbsp;").append(suffix);
    } else {
      sb.append("<li><span class='disable'>&nbsp;下一页&nbsp;?</span></li>");
      //sb.append("<li><span class='disable'>&nbsp;尾页&nbsp;</span></li>");
    }
    sb.append("<li><a href='javascript:void(0)' onclick=\"window.location.href='");
    sb.append(url).append(split).append(parmPrefix).append("refresh").append("'\" class='pagereload'>&nbsp;刷新&nbsp;").append(suffix);
    sb.append("</ul>").append("</div>");    
    return sb.toString();
  }
  
  private static boolean addQuickPage(StringBuilder sb, StringBuilder prefix, 
      StringBuilder sizeAndTotal, String suffix, int curPage, int pageCount,
      int minPage, int maxPage, int minPageCount, int maxPageCount, int quickPage, boolean hasPutDot) {
    if(curPage >= minPage && curPage <= maxPage && pageCount >= minPageCount  &&  pageCount <= maxPageCount) {
      if (!hasPutDot) {
        sb.append("<li><a href='javascript:void(0)' class='pageNo'>..</a></li>");
        hasPutDot = true;
      }
      sb.append(prefix).append(quickPage).append(sizeAndTotal).append("'\" class='pageNo'>").append(quickPage).append(suffix);  
    }
    return hasPutDot;
  }
}