struts开发实践―分页的实现

2.分页逻辑方法代码节选：

public void setPageInfo(PaginationInfo paginationInfo) {

    //跳转页

    if (paginationInfo.getJumpState() == 1) { //首页

      paginationInfo.setCurrentPageNumber(1);

    }

    if (paginationInfo.getJumpState() == 2) {

      paginationInfo.setCurrentPageNumber(paginationInfo.getCurrentPageNumber() -

                                          1);

    }

    if (paginationInfo.getJumpState() == 3) {

      paginationInfo.setCurrentPageNumber(paginationInfo.getCurrentPageNumber() +

                                          1);

    }

    if (paginationInfo.getJumpState() == 4) {

      paginationInfo.setCurrentPageNumber(paginationInfo.getTotalPage());

    }

    int totalPage = total / paginationInfo.getPageSize();

    if (total % paginationInfo.getPageSize() > 0) {

      paginationInfo.setTotalPage(totalPage + 1);

    }

    else {

      paginationInfo.setTotalPage(totalPage);

    }

    if (paginationInfo.getCurrentPageNumber() <= 1) {

      paginationInfo.setCurrentPageNumber(1);

      paginationInfo.setHasPrevious(false);

      paginationInfo.setHasNext(true);

    }

    else if (paginationInfo.getCurrentPageNumber() >=

             paginationInfo.getTotalPage()) {

      paginationInfo.setCurrentPageNumber(paginationInfo.getTotalPage());

      paginationInfo.setHasNext(false);

      paginationInfo.setHasPrevious(true);

    }

    else {

      paginationInfo.setHasPrevious(true);

      paginationInfo.setHasNext(true);

    }

  }

3。jsp页面的分页显示代码节选：

<logic:equal name="testForm" property="paginationInfo.currentPageNumber" value="1">

   <td align="right" width="30" height="22"><img src="images/pages/distop.gif" alt="首页" border="0"></td>

   <td align="right" width="30" height="22"><img src="images/pages/disprevious.gif" alt="上一页" border="0" ></td>

</logic:equal>

<logic:greaterThan name="testForm" property="paginationInfo.currentPageNumber" value="1">

   <td align="right" width="30" height="22"><a href="javascript:gotoPage(1)"><img src="images/pages/top.gif" alt="首页" border="0" ></a></td>

   <td align="right" width="30" height="22"><a href="javascript:gotoPage(2)"><img src="images/pages/previous.gif" alt="上一页" border="0"></a></td>

</logic:greaterThan>

<logic:equal name="testForm" property="paginationInfo.hasNext" value="false">

      <td align="right" width="30" height="22"><img src="images/pages/disnext.gif" alt="下一页" border="0" ></td>

      <td align="right" width="30" height="22"><img src="images/pages/disbottom.gif" alt="末页" border="0" ></td>

</logic:equal>

<logic:equal name="testForm" property="paginationInfo.hasNext" value="true">

       <td align="right" width="30" height="22"><a href="javascript:gotoPage(3)"><img src="images/pages/next.gif" alt="下一页" border="0" ></a></td>

       <td align="right" width="30" height="22"><a href="javascript:gotoPage(4)"><img src="images/pages/bottom.gif" alt="末页" border="0"></a></td>

</logic:equal>

<html:hidden name="testForm" property="paginationInfo.jumpState">

...//省略

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