簡單的分頁

1.jsp頁面：

<%
int currentPage = Integer.parseInt(request.getAttribute("currentPage").toString());
int totalPage = Integer.parseInt(request.getAttribute("totalPage").toString());
%>
<div align="center">
     <a href="Query.servlet?currentPage=1">
        <font color='#0000ff'>首頁</font>
     </a>
     <a href="Query.servlet?currentPage=<%=(currentPage-1)%>">
        <font color='#0000ff'>上一頁</font>
     </a>
     <a href="Query.servlet?currentPage=<%=(currentPage+1)%>">
        <font color='#0000ff'>下一頁</font>
     </a>
     <a href="Query.servlet?currentPage=<%=totalPage%>">
        <font color='#0000ff'>尾頁</font>
     </a>
</div>

2.web.xml配置：

<servlet>
    <servlet-name>Query</servlet-name>
    <servlet-class>com.servlet.QueryServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>Query</servlet-name>
    <url-pattern>/Query.servlet</url-pattern>
</servlet-mapping>

3.QueryServlet類：

package com.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.bean.CourseInfo;
import com.service.CourseService;

public class QueryServlet extends HttpServlet
{

    /**
     * {序列號}
     */
    private static final long serialVersionUID = -6413058086073194500L;
    /**
     *
     * {查詢所有課程}
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     * @author:LJ
     */
    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException,
            IOException
    {
        CourseService courseService = new CourseService();
        //查詢總記錄數
        int totalRows = courseService.queryCount();
        CourseInfo courseInfo = new CourseInfo();
        courseInfo.setTotalRows(totalRows);
        //獲取頁面當前頁
        String currentPage = request.getParameter("currentPage");
        if(currentPage != null)
        {
            courseInfo.setCurrentPage(Integer.parseInt(currentPage));
        }
        int page = courseInfo.getCurrentPage();
        int pageSize = courseInfo.getPageSize();
        List<CourseInfo> courseList = new ArrayList<CourseInfo>();
        courseList = courseService.queryAll(page,pageSize);
        request.setAttribute("currentPage", page);
        request.setAttribute("totalPage", courseInfo.getTotalPage());
        request.setAttribute("courseList", courseList);
        request.getRequestDispatcher("main.jsp").forward(request, response);
    }
}

4.分頁bean：PageInfo.java

package com.bean;

public class PageInfo
{
    private int currentPage = 1;//當前頁
    private int totalPage ;     //總頁數
    private int pageSize = 2;   //每頁顯示記錄數
    private int totalRows ;     //總記錄數
    /**
     *
     * {當前頁set方法}
     *
     * @param currentPage
     * @author:LJ
     */
    public void setCurrentPage(int currentPage)
    {
        if(currentPage >= this.totalPage)
        {
            this.currentPage = this.totalPage;
        }
        else if(currentPage <= 1)
        {
            this.currentPage = 1;
        }
        else
        {
            this.currentPage = currentPage;
        }
    }
    /**
     *
     * {當前頁get方法}
     *
     * @return
     * @author:LJ
     */
    public int getCurrentPage()
    {
        return currentPage;
    }
    /**
     *
     * {總頁數set方法}
     *
     * @param totalPage
     * @author:LJ
     */
    public void setTotalPage()
    {
        this.totalPage = (totalRows%pageSize==0)?(totalRows/pageSize):(totalRows/pageSize+1);
        //this.totalPage = (totalRows + pageSize - 1)/pageSize;
        //this.totalPage = (totalRows - 1)/pageSize + 1;
    }
    /**
     *
     * {總頁數get方法}
     *
     * @return
     * @author:LJ
     */
    public int getTotalPage()
    {
        return totalPage;
    }
    /**
     *
     * {每頁顯示記錄數set方法}
     *
     * @param pageSize
     * @author:LJ
     */
    public void setPageSize(int pageSize)
    {
        this.pageSize = pageSize;
    }
    /**
     *
     * {每頁顯示記錄數get方法}
     *
     * @return
     * @author:LJ
     */
    public int getPageSize()
    {
        return pageSize;
    }
    /**
     *
     * {總記錄數set方法}
     *
     * @param totalRows
     * @author:LJ
     */
    public void setTotalRows(int totalRows)
    {
        this.totalRows = totalRows;
        this.setTotalPage();
    }
    /**
     *
     * {總記錄數get方法}
     *
     * @return
     * @author:LJ
     */
    public int getTotalRows()
    {
        return totalRows;
    }
}