weiweichen1985

 /**
  *
  * @param recordsCount int:总记录数
  * @param pageSize int:每页要显示的记录数
  * @param currentPage int:当前的页数
  * @param url String:链接的路径
  * @return String:导航条

 url还可能追加参数
示例调用:

--------------------------------------------------
String str = turnPage.printTurnPageBar(100, 35, 1,
                                        "searchshow.jsp?t=1&s1=N&s2=1&c=1");
 System.out.println("str=" + str);
--------------------------------------------------
*/

 public static String printTurnPageBar(int recordsCount, int pageSize,
                                       int currentPage, String url) {
     String barStr = "";
     int index = url.indexOf("?");
     if (recordsCount <= pageSize) {
         if (recordsCount == 0) {
             barStr = "没有相关记录";
         } else {
             barStr = "[1]";
         }
         return barStr;
     }
     int pageCount = recordsCount % pageSize == 0 ?
                     recordsCount / pageSize :
                     recordsCount / pageSize + 1;
     int begin = 0, end = 0;
     boolean b1 = false;
     /*
         当总页数小于10页时
      */
     if (pageCount <= 10) {
         begin = 1;
         end = pageCount;
     } else {
         if (currentPage == 1) {
             begin = 1;
             end = 10;
         } else {
             if (index == -1) {
                 barStr = "<a href=\"" + url + "?page=" +
                          (currentPage - 1) + "\">上一页</a> ";
             } else {
                 barStr = "<a href=\"" + url + "&page=" +
                          (currentPage - 1) + "\">上一页</a> ";
             }

             if (currentPage - 5 > 1) {
                 if (currentPage + 4 <= pageCount) {
                     begin = currentPage - 5;
                     end = currentPage + 4;
                     b1 = true;
                 } else {
                     end = pageCount;
                     begin = pageCount - 9;
                 }
             } else {
                 begin = 1;
                 end = 10;
             }
         }
     }
     for (int i = begin; i <= end; i++) {
         if (index == -1) {
             if (i == currentPage) {
                 barStr += "<a href=\"" + url + "?page=" + i +
                         "\">" + i + "</a> ";
             } else {
                 barStr += "<a href=\"" + url + "?page=" + i +
                         "\">[" + i + "]</a> ";
             }
         } else {
             if (i == currentPage) {
                 barStr += "<a href=\"" + url + "&page=" + i +
                         "\">" + i + "</a> ";
             } else {
                 barStr += "<a href=\"" + url + "&page=" + i +
                         "\">[" + i + "]</a> ";
             }
         }
     }
     if (b1) {
         if (index == -1) {
             barStr += "<a href=\"" + url + "?page=" +
                     (currentPage + 1) +
                     "\">下一页</a>";
         } else {
             barStr += "<a href=\"" + url + "&page=" +
                     (currentPage + 1) +
                     "\">下一页</a>";
         }
     }
     return barStr;
 }