1. 程式人生 > >ssm框架實現分頁(limit)

ssm框架實現分頁(limit)

pojo層新建類PageBean

package com.qut.pojo;

import java.util.List;

public class PageBean<T>{
    private int pageNumber; //總記錄
    private int pageCount; //總頁數
    private Integer pageIndex; //當前頁
    private int pageSize; //每頁幾條資料
    private List<T>list; //當前頁的資料
    public int getPageNumber() {
        return
pageNumber; } public void setPageNumber(int pageNumber) { this.pageNumber = pageNumber; } public int getPageCount() { return pageCount; } public void setPageCount(int pageCount) { this.pageCount = pageCount; } public Integer getPageIndex() { return
pageIndex; } public void setPageIndex(Integer pageIndex) { this.pageIndex = pageIndex; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } public List<T> getList() { return
list; } public void setList(List<T> list) { this.list = list; } }

實體類Dao層新增兩個方法

    //分頁顯示所有崗位
    public List<Position> showlist(int index);

    //計算資料總數
    public int pagecount();

xml新增兩條語句

  <select id="countIndex" parameterType="com.qut.pojo.Position" resultType="int">
        select count(*) from Position where 1=1
        <if test='p_name!=null and p_name!=""'>
            and p_name = #{p_name}
        </if>
        <if test='p_no!=0'>
            and p_no = #{p_no}
        </if>
        <if test='p_type!=null and p_type!=""'>
            and p_type = #{p_type}
        </if>
    </select>

    <select id="showlist" parameterType="int" resultType="com.qut.pojo.Position">
        select *
        from Position limit #{index},10
    </select>

Service層

    public List<Position> showlist(int index);

    public int pagecount();

ServiceImpl層

        public List<Position> showlist(int index) {
            // TODO Auto-generated method stub
            return poMapper.showlist(index);
        }

        public int pagecount() {
            // TODO Auto-generated method stub
            return poMapper.pagecount();
        }

Controller層

    @RequestMapping("/page")
    public ModelAndView showlist(HttpServletRequest request){

            ModelAndView view = new ModelAndView(); 

            Integer pageIndex = 1;
            int pageSize = 4;
            PageBean<Position> pageUtil = new PageBean<Position>();
            List<Position> list = new ArrayList<Position>();
            if(request.getParameter("pageIndex")!=null){
                pageIndex = Integer.parseInt((String)request.getParameter("pageIndex"));
            }
            pageUtil.setPageIndex(pageIndex);
            int number = ps.pagecount();
            pageUtil.setPageNumber(number);
            pageUtil.setPageSize(pageSize);
            if((int)pageUtil.getPageNumber() % (int)pageUtil.getPageSize() ==0){
                pageUtil.setPageCount((int) Math.ceil((double) (pageUtil
                        .getPageNumber() / pageUtil.getPageSize())));
            }else{
                pageUtil.setPageCount((int) Math.ceil((double) (pageUtil
                        .getPageNumber() / pageUtil.getPageSize()))+1);
            }

            int index = (pageIndex-1)*pageSize;
            list = ps.showlist(index);
            pageUtil.setList(list);

            view.addObject("pageUtil",pageUtil);
            view.setViewName("show");
            return view;
        }

jsp遍歷程式碼

<c:forEach items="${pageUtil.list}" var="c" begin="0" end="4">
<!--顯示四條,這裡要與controller中的pageSize以及xml中sql查詢的條數對應-->
    <span class="STYLE1">${c.p_name}</span>
    <span class="STYLE1">${c.p_type}</span>
    <span class="STYLE1">${c.p_num}</span> 
</c:forEach>

jsp顯示共多少頁,現在在第幾頁,首頁,上一頁,下一頁以及下一頁程式碼

      <font size="2">共 ${pageUtil.pageCount} 頁</font> <font size="2">第  
            ${pageUtil.pageIndex} 頁</font> <a href="page.action?pageIndex=1&doaction=woaiyuxue">首頁</a>  
        <c:choose>  
            <c:when test="${pageUtil.pageIndex - 1 > 0}">  
                <a href="page.action?pageIndex=${pageUtil.pageIndex - 1}&doaction=woaiyuxue">上一頁</a>  
            </c:when>  

        </c:choose>  
        <c:choose>  
            <c:when test="${pageUtil.pageCount==0}">  
                <a href="page.action?pageIndex=${pageUtil.pageIndex }&doaction=woaiyuxue">下一頁</a>  
            </c:when>  
            <c:when test="${pageUtil.pageIndex + 1 <= pageUtil.pageCount}">  
                <a href="page.action?pageIndex=${pageUtil.pageIndex+1}&doaction=woaiyuxue">下一頁</a>  
            </c:when>  

        </c:choose>  
        <c:choose>  
            <c:when test="${page.pageCount==0}">  
                <a href="page.action?pageIndex=${pageUtil.pageIndex}&doaction=woaiyuxue">尾頁</a>  
            </c:when>  
            <c:otherwise>  
                <a href="page.action?pageIndex=${pageUtil.pageCount}&doaction=woaiyuxue">尾頁</a>  
            </c:otherwise>  
        </c:choose>  

相關推薦

no