bootstrap與pagehelper實(shí)現(xiàn)分頁(yè)效果

更新時(shí)間：2018年12月29日 14:21:26 作者：yuruixin_china

這篇文章主要為大家詳細(xì)介紹了bootstrap與pagehelper實(shí)現(xiàn)分頁(yè)效果，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

最近做的一些小項(xiàng)目中，都有用到分頁(yè)，需要自己去搞。就把整個(gè)分頁(yè)實(shí)現(xiàn)整理下吧，方便自己也方便他人。

前臺(tái)

1.引入paging.js

//分頁(yè)，頁(yè)碼導(dǎo)航,要求參數(shù)為一個(gè)對(duì)象
function createPageNav(opt) {
  opt= opt || {};
  var $container  = opt.$container     || null, //必需，頁(yè)碼容器，請(qǐng)確保這個(gè)容器只用來(lái)存放頁(yè)碼導(dǎo)航
    pageCount  = Number(opt.pageCount)  || 0,  //必需，頁(yè)碼總數(shù)
    currentNum  = Number(opt.currentNum) || 1,  //選填，當(dāng)前頁(yè)碼
    maxCommonLen = Number(opt.maxCommonLen)|| 10,  //選填，普通頁(yè)碼的最大個(gè)數(shù)

    className = opt.className || "pagination",//選填，分頁(yè)類型：pagination或pager等
    preText  = opt.preText  || "上一頁(yè)",   //選填，上一頁(yè)文字顯示，適用于只有前后頁(yè)按鈕的情況
    nextText = opt.nextText  || "下一頁(yè)",   //選填，下一頁(yè)文字，同上
    firstText = opt.firstText || "首頁(yè)",
  lastText = opt.lastText  || "末頁(yè)",

    hasFirstBtn = opt.hasFirstBtn  === false ? false : true,
    hasLastBtn  = opt.hasLastBtn  === false ? false : true,
    hasPreBtn  = opt.hasPreBtn   === false ? false : true,
    hasNextBtn  = opt.hasNextBtn  === false ? false : true,
    hasInput   = opt.hasInput   === false ? false : true,
    hasCommonPage= opt.hasCommonPage === false ? false : true,//選填，是否存在普通頁(yè)

    beforeFun = opt.beforeFun || null, //選填，頁(yè)碼跳轉(zhuǎn)前調(diào)用的函數(shù)，可通過返回false來(lái)阻止跳轉(zhuǎn)，可接收目標(biāo)頁(yè)碼參數(shù)
    afterFun = opt.afterFun || null, //選填，頁(yè)碼跳轉(zhuǎn)后調(diào)用的函數(shù)，可接收目標(biāo)頁(yè)碼參數(shù)
    noPageFun = opt.noPageFun || null; //選填，頁(yè)碼總數(shù)為0時(shí)調(diào)用的函數(shù)

  //當(dāng)前顯示的最小頁(yè)碼，用于計(jì)算起始頁(yè)碼，直接容器,當(dāng)前頁(yè)，前，后，首，末，輸入框
  var minNum=1,changeLen,$parent,$currentPage,$preBtn,$nextBtn,$firstBtn,$lastBtn,$input;

  //容器
  if (!$container || $container.length != 1){
    console.log("分頁(yè)容器不存在或不正確");
    return false;
  }
  //總頁(yè)數(shù)
  if(pageCount <= 0){
    if(noPageFun) noPageFun();
    return false;
  }
  //當(dāng)前頁(yè)
  if (currentNum < 1) currentNum = 1;
  else if (currentNum > pageCount) currentNum = pageCount;
  //普通頁(yè)碼的最大個(gè)數(shù)，起始頁(yè)算法限制，不能小于3
  if(maxCommonLen<3) maxCommonLen=3;
  //跳轉(zhuǎn)頁(yè)響應(yīng)長(zhǎng)度，用于計(jì)算起始頁(yè)碼
  if(maxCommonLen>=8) changeLen=3;
  else if(maxCommonLen>=5) changeLen=2;
  else changeLen=1;

  $container.hide();
  _initPageNav();
  $container.show();

  function _initPageNav(){
    var initStr = [];
    initStr.push('<nav><ul class="'+ className +'" onselectstart="return false">');
    if(hasFirstBtn)initStr.push('<li class="first-page" value="1"><span>'+ firstText +'</span></li>');
    if(hasPreBtn) initStr.push('<li class="pre-page" value="' + (currentNum - 1) + '"><span>'+ preText +'</span></li>');
    if(hasNextBtn) initStr.push('<li class="next-page" value="' + (currentNum + 1) + '"><span>'+ nextText +'</span></li>');
    if(hasLastBtn) initStr.push('<li class="last-page" value="' + pageCount + '"><span>'+ lastText +'</span></li>');
    if(hasInput)  
      initStr.push('<div class="input-page-div">當(dāng)前第<input type="text" maxlength="6" value="' + currentNum + '" />頁(yè)，共<span>'
        + pageCount
        + '</span>頁(yè)<button type="button" class="btn btn-xs input-btn-xs">確定</button></div>');
    initStr.push('</ul></nav>');

    $container.html(initStr.join(""));
    //初始化變量
    $parent=$container.children().children();
    if(hasFirstBtn) $firstBtn = $parent.children("li.first-page");
    if(hasPreBtn)  $preBtn  = $parent.children("li.pre-page");
    if(hasNextBtn) $nextBtn = $parent.children("li.next-page");
    if(hasLastBtn) $lastBtn = $parent.children("li.last-page");
    if(hasInput){
      $input = $parent.find("div.input-page-div>input");
      $parent.find("div.input-page-div>button").click(function(){
        _gotoPage($input.val());
      });
    }  
    //初始化功能按鈕
    _buttonToggle(currentNum);
    //生成普通頁(yè)碼
    if(hasCommonPage) {
      _createCommonPage(_computeStartNum(currentNum), currentNum);
    }
    //綁定點(diǎn)擊事件
    $parent.on("click", "li",function () {
      var $this=$(this);
      if ($this.is("li") && $this.attr("value")){
        if(!$this.hasClass("disabled") && !$this.hasClass("active")){
          _gotoPage($this.attr("value"));
        }
      }
    });
  }
  //跳轉(zhuǎn)到頁(yè)碼
  function _gotoPage(targetNum) {
    targetNum=_formatNum(targetNum);
    if (targetNum == 0 || targetNum == currentNum) return false;
    // 跳轉(zhuǎn)前回調(diào)函數(shù)
    if (beforeFun && beforeFun(targetNum) === false) return false;
    //修改值
    currentNum=targetNum;
    if(hasInput)  $input.val(targetNum);
    if(hasPreBtn) $preBtn.attr("value", targetNum - 1);
    if(hasNextBtn) $nextBtn.attr("value", targetNum + 1);
    //修改功能按鈕的狀態(tài)
    _buttonToggle(targetNum);
    // 計(jì)算起始頁(yè)碼
    if(hasCommonPage) {
      var starNum = _computeStartNum(targetNum);
      if (starNum == minNum) {// 要顯示的頁(yè)碼是相同的
        $currentPage.removeClass("active");
        $currentPage = $parent.children("li.commonPage").eq(targetNum - minNum).addClass("active");
      } 
      else {// 需要刷新頁(yè)碼
        _createCommonPage(starNum, targetNum);
      }
    }
    // 跳轉(zhuǎn)后回調(diào)函數(shù)
    if (afterFun) afterFun(targetNum);
  }
  //整理目標(biāo)頁(yè)碼的值
  function _formatNum(num){
    num = Number(num);
    if(isNaN(num)) num=0;
    else if (num <= 0) num = 1;
    else if (num > pageCount) num = pageCount;
    return num;
  }
  //功能按鈕的開啟與關(guān)閉
  function _buttonToggle(current){
    if (current == 1) {
      if(hasFirstBtn) $firstBtn.addClass("disabled");
      if(hasPreBtn)  $preBtn.addClass("disabled");
    } 
    else {
      if(hasFirstBtn) $firstBtn.removeClass("disabled");
      if(hasPreBtn)  $preBtn.removeClass("disabled");
    }

    if (current == pageCount) {
      if(hasNextBtn) $nextBtn.addClass("disabled");
      if(hasLastBtn) $lastBtn.addClass("disabled");
    }
    else {
      if(hasNextBtn) $nextBtn.removeClass("disabled");
      if(hasLastBtn) $lastBtn.removeClass("disabled");
    }
  }
  //計(jì)算當(dāng)前顯示的起始頁(yè)碼
  function _computeStartNum(targetNum) {
    var startNum;
    if (pageCount <= maxCommonLen)
      startNum = 1;
    else {
      if ((targetNum - minNum) >= (maxCommonLen-changeLen)) {//跳轉(zhuǎn)到靠后的頁(yè)碼
        startNum = targetNum - changeLen;
        if ((startNum + maxCommonLen-1) > pageCount) startNum = pageCount - (maxCommonLen-1);// 邊界修正
      } 
      else if ((targetNum - minNum) <= (changeLen-1)) {//跳轉(zhuǎn)到靠前的頁(yè)碼
        startNum = targetNum - (maxCommonLen-changeLen-1);
        if (startNum <= 0) startNum = 1;// 邊界修正
      } 
      else {// 不用改變頁(yè)碼
        startNum = minNum;
      }
    }
    return startNum;
  }
  //生成普通頁(yè)碼
  function _createCommonPage(startNum, activeNum) {
    var initStr = [];
    for (var i = 1,pageNum=startNum; i <= pageCount && i <= maxCommonLen; i++ , pageNum++) {
      initStr.push('<li class="commonPage" value="' + pageNum + '"><a href="javascript:" rel="external nofollow" >' + pageNum + '</a></li>');
    }

    $parent.hide();
    $parent.children("li.commonPage").remove();
    if(hasPreBtn) $preBtn.after(initStr.join(""));
    else if(hasFirstBtn) $firstBtn.after(initStr.join(""));
    else $parent.prepend(initStr.join(""));
    minNum = startNum;
    $currentPage = $parent.children("li.commonPage").eq(activeNum-startNum).addClass("active");
    $parent.show();
  }
}

2.引入paging.css

ul.pagination>li>span,ul.pagination>li>a,ul.pagination>li.active>a,ul.pager>li>span{
cursor: pointer;
}
.input-page-div>input{
width:5em;
height:1.8em;
margin:0.4em 0.2em 0.2em 0.2em;
text-align: center;
}
.input-page-div>.input-btn-xs{
margin-left:1em;
font-size: 1em;
width:3em;
background-color: #337ab7;
color:#fff;
}
.input-page-div{
display: inline-block;
margin-left:1em;
}

3.頁(yè)面中添加一個(gè)div容器

<div id="paging"></div>

4.js中添加一段代碼

createPageNav({
   $container : $("#paging"),
   pageCount : data.pages,
   currentNum : data.pageNum,
   afterFun : function(num){
     getResult(num,10);
   }
 });

例：

function getResult(pageNum,pageSize){
   $.ajax({
     type: "GET",
     url: "../../metrics.do?type=8&pageNum="+pageNum+"&pageSize="+pageSize,
     data: {},
     dataType: "json",
     success: function(data){
       list = data.data;
       createPageNav({
          $container : $("#paging"),
          pageCount : data.pages,
          currentNum : data.pageNum,
          afterFun : function(num){
            getResult(num,10);
          }
       });
       createList(data.data);
//      createSelect(data);
       console.info(data);
     }
   });
}

后臺(tái)

5.引入pagehelper依賴

<!-- yuruixin add mybatis paging -->
  <dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper</artifactId>
    <version>4.1.6</version>
  </dependency>

6.service層添加如下代碼

//pageSize=0時(shí)，查詢所有
PageHelper.startPage(pageNum, pageSize);
Page<ExtractMetrics> extractMetrics = extractMetricsMapper.selectByCondition(extractMetric,pageNum,pageSize);

7.controller層添加如下代碼

Map<String,Object> map = new HashMap<String,Object>();
//查詢頁(yè)數(shù)
map.put("pageNum", extractMetrics.getPageNum());
 //每頁(yè)條數(shù)
map.put("pageSize", extractMetrics.getPageSize());
 //總條數(shù)
map.put("total", extractMetrics.getTotal());
 //總頁(yè)數(shù)
map.put("pages", extractMetrics.getPages());
map.put("data", extractMetrics.getResult());

至此，bootstrap與pagehelper實(shí)現(xiàn)分頁(yè)流程完畢

效果如下：