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详解velocity模板使javaWeb的html+js实现模块化
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DDR爱好者之家 Design By 杰米

详解velocity模板使javaWeb的html+js实现模块化

页面上一些基础数据或者其他页面经常用到部分，可以独立出来做成小组件，组件预留调用入口，需要的页面直接调用即可。
如图，页面中的展示分类和搜索标签在多个页面重复使用，可以将这部分内容独立出来，做成组件，供后续开发调用：

详解velocity模板使javaWeb的html+js实现模块化

classify_search_tag.html文件如下，其中包含HTML节点和jQuery代码；

<!-- 
展示分类与搜索标签组件使用说明： 
  1.新增时父页面调用方法：页面加载时调用 goodsClassifyAndSearchTag.getFirstLevelClassify();/** 初始化一级展示分类 **/ 
  2.编辑时父页面调用方法：页面加载时调用 goodsClassifyAndSearchTag.getClassifyAndSearchTag(String classifys); 
    ShowClassifyList类型json串，可参考 \js\standard_v2\group\group_edit.js 该方法 groupGoodsObj.getEditClassify(); 
  3.返回页面选中的展示分类和搜索标签，调用 goodsClassifyAndSearchTag.returnSelectedClassifyAndTag(); 
  注意事项：可能会出现js冲突问题，父页面的js最好在文件顶部加载 
--> 
<!--展示分类--> 
<div class="row form-horizontal"> 
  <div class="col-md-12"> 
    <div class="form-group"> 
      <label class="col-md-1 control-label pr0">展示分类</label> 
      <div class="col-md-1"> 
        <select class="form-control" id="first_classify" onchange="goodsClassifyAndSearchTag.getSecondClassify(this)"> 
          <option value="0">请选择</option> 
        </select> 
      </div> 
      <div class="col-md-1"> 
        <select class="form-control" id="second_classify" onchange="goodsClassifyAndSearchTag.getThirdClassify(this)"> 
          <option value="0">请选择</option> 
        </select> 
      </div> 
      <div class="col-md-1"> 
        <select class="form-control" id="third_classify" onchange="goodsClassifyAndSearchTag.getSearchTag(this)"> 
          <option value="0">请选择</option> 
        </select> 
      </div> 
    </div> 
  </div> 
</div> 
<!--搜索标签--> 
<div class="row mb15"> 
  <div class="col-md-12"> 
    <h2><small>搜索标签：</small></h2> 
  </div> 
</div> 
<div class="row form-horizontal" id="classify_template"> 
  <div class="col-md-12" name="tag_original"> 
    <div name="selectTagDom" id="selectTagDom"></div> 
    <div name="commonTagDom" id="commonTagDom"></div> 
  </div> 
</div> 
<!-- 展示分类模板 --> 
<script id="classifyTemplate" type="text/x-jsrender"> 
  <option value="{{:id}}">{{:classilyName}}</option> 
</script> 
<!-- 普通标签模板 --> 
<script id="commonTagTemplate" type="text/x-jsrender"> 
  <div class="form-group"> 
    <label class="col-md-1 control-label pr0">{{:optionName}}</label> 
    <div class="col-md-9"> 
      {{for optionValues}} 
        <label class="checkbox-inline"> 
          {{if checked==true}} 
            <input type="checkbox" checked name='{{: #data.optionId}}' optionid='{{: #data.optionId}}' valueid='{{: #data.id}}'> 
          {{else}} 
            <input type="checkbox" name='{{: #data.optionId}}' optionid='{{: #data.optionId}}' valueid='{{: #data.id}}'/> 
          {{/if}} 
          <span>{{: #data.value}}</span> 
        </label> 
      {{/for}} 
    </div> 
  </div> 
</script> 
<!-- 级联标签模板 --> 
<script id="selectTagTemplate" type="text/x-jsrender"> 
  <div class="form-group" id='label_{{:optionId}}' valueid='{{:valueId}}'> 
    <label class="col-md-1 control-label pr0">{{:optionName}}</label> 
    <div class="col-md-9"> 
      {{for optionValues}} 
        <label class="checkbox-inline"> 
          {{if checked==true}} 
            <input type="checkbox" checked name='{{: #data.optionId}}' optionid='{{: #data.optionId}}' valueid='{{: #data.id}}' onclick='goodsClassifyAndSearchTag.getChildSelectOption({{: #data.optionId}}, {{: #data.id}}, this)'> 
          {{else}} 
            <input type="checkbox" name='{{: #data.optionId}}' optionid='{{: #data.optionId}}' valueid='{{: #data.id}}' onclick='goodsClassifyAndSearchTag.getChildSelectOption({{: #data.optionId}}, {{: #data.id}}, this)'/> 
          {{/if}} 
          <span>{{: #data.value}}</span> 
        </label> 
      {{/for}} 
    </div> 
  </div> 
</script> 
<!-- 级联子标签模板 --> 
<script id="childOptionTemplate" type="text/x-jsrender"> 
  <div class="form-group" name='label_{{:optionId}}' valueId='{{:valueId}}'> 
    <lable class="col-md-1 control-label pr0">{{:optionName}}</lable> 
    <div class="col-md-9"> 
      {{for optionValues}} 
        <label class="checkbox-inline"> 
          <input type="checkbox" name='{{:#parent.parent.data.optionId}}' optionid='{{: #data.optionId}}' valueid='{{: #data.id}}' onclick='goodsClassifyAndSearchTag.getChildSelectOption({{: #data.optionId}}, {{: #data.id}}, this)'/> 
          <span>{{: #data.value}}</span> 
        </label> 
      {{/for}} 
    </div> 
  </div> 
</script> 
<!--展示分类和搜索标签相关处理js代码开始--> 
<script> 
 
  /** 
   * 展示分类和搜索标签对象 
   * @type {{index: {index: number}, getEditClassify: goodsClassifyAndSearchTag."getEditClassify"}} 
   */ 
  var goodsClassifyAndSearchTag = { 
    "index": 1, 
    "getFirstLevelClassify": function () { /** 获取一级展示类目,新增时父页面调用入口 **/ 
    var url = '/showClassify/getClassifyByPid"GET"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
        $("#first_classify").append($("#classifyTemplate").render(value)); 
      }); 
      commonJS.loading("close"); 
    }, 
    "getSecondClassify": function (e) { /** 获取二级展示类型 **/ 
    $("#second_classify").html("<option value='0'>请选择</option>"); 
      $("#third_classify").html("<option value='0'>请选择</option>"); 
      $("#commonTagDom").html(""); 
      $("#selectTagDom").html(""); 
      if($(e).val() == 0){ 
        return; 
      } 
      var url = '/showClassify/getClassifyByPid"GET"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
        $("#second_classify").append($("#classifyTemplate").render(value)); 
      }); 
      commonJS.loading("close"); 
      goodsClassifyAndSearchTag.getSearchTag(e); 
    }, 
    "getThirdClassify": function (e) { 
      $("#third_classify").html("<option value='0'>请选择</option>"); 
      $("#commonTagDom").html(""); 
      $("#selectTagDom").html(""); 
      if($(e).val() == 0){ 
        return; 
      } 
      var url = '/showClassify/getClassifyByPid"GET"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
        $("#third_classify").append($("#classifyTemplate").render(value)); 
      }); 
      commonJS.loading("close"); 
      goodsClassifyAndSearchTag.getSearchTag(e); 
    }, 
    "getSearchTag": function (e) { 
      $("#commonTagDom").html(""); 
      $("#selectTagDom").html(""); 
      var classifyId = $(e).val(); 
      if(0 == classifyId){ 
        return; 
      } 
      goodsClassifyAndSearchTag.getClassifyCommonSearchOption(e); 
      goodsClassifyAndSearchTag.getClassifySelectedSearchOption(e); 
    }, 
    "getClassifyCommonSearchOption": function (e) { /** 查询当前分类的所有普通标签 **/ 
    var classifyId = $(e).val(); 
      var url = '/searchTag/getCommonOptionByClassifyId"GET"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
 
        $("div[name='commonTagDom']").html($("#commonTagTemplate").render(value)); 
        var commonRadios = $("div[name='commonTagDom']").find("input[type='checkbox']"); 
        $.each(commonRadios, function (n, commonRadio) { 
          var newName = goodsClassifyAndSearchTag.index + "_" + $(commonRadio).attr("name"); 
          $(commonRadio).attr("name", newName); 
        }); 
      }); 
      commonJS.loading("close"); 
    }, 
    "getClassifySelectedSearchOption": function (e) { /** 查询当前分类的所有一级级联搜索标签 **/ 
    var classifyId = $(e).val(); 
      var url = '/searchTag/getSelectedOptionByClassifyId"&pid=0"; 
      var ajaxObj = {url: configJS.hostUrl() + url, async: true, method: "GET"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
        $("div[name='selectTagDom']").html($("#childOptionTemplate").render(value)); 
        var selectRadios = $("div[name='selectTagDom']").find("input[type='checkbox']"); 
        $.each(selectRadios, function (n, selectRadio) { 
          var newName = goodsClassifyAndSearchTag.index + "_" + $(selectRadio).attr("name"); 
          $(selectRadio).attr("name", newName); 
        }); 
 
      }); 
      commonJS.loading("close"); 
    }, 
    "getChildSelectOption": function (parentOptionId, valueId, e) { /** 根据标签值id获取下级标签 **/ 
    var url = '/searchTag/getChildSelectedOptionByValueId"GET"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
        if(value==null||value.length==0){ 
          return; 
        } 
        var parent = $($(e).parents().parents()[1]); 
        if(e.checked){ 
          value[0]['valueId']=valueId; 
          var childHtml = $("#childOptionTemplate").render(value); 
          parent.after(childHtml); 
        }else{ 
          // 先删除所有后面的兄弟节点 
          var divs=parent.nextAll('div'); 
          goodsClassifyAndSearchTag.deleteOptionDiv(divs,valueId); 
        } 
      }); 
      commonJS.loading("close"); 
    }, 
    "deleteOptionDiv":function(divs,valueId){ 
      $.each(divs,function(key,obj){ 
        if($(obj).attr("valueid")==valueId){ 
          var inputs=$(obj).find('input'); 
          $.each(inputs,function(key1,obj1){ 
            if(obj1.checked){ 
              goodsClassifyAndSearchTag.deleteOptionDiv(divs,$(obj1).attr('valueid')); 
            } 
          }); 
          $(obj).remove(); 
        } 
      }); 
    }, 
    "getClassifyAndSearchTag": function (showClassifys) {//编辑时回写搜索标签，父页面调用入口 
      var url = "/standardGroupV2/getClassifyAndSearchTag"; 
      var param = {}; 
      param["showClassifyList"] = showClassifys.showClassifyList; 
      var ajaxObj = {url: configJS.hostUrl() + url, async: true, param: {"showClassifys": JSON.stringify(param)}, method: "POST"}; 
      commonJS.loading("open"); 
      commonJS.sendAjaxRequest(ajaxObj, function (value) { 
        $.each(value, function (n, obj) { 
          var html = $($("#classify_template").html()); 
 
          var firstLevelHtml = ''; 
          var secondLevelHtml = ''; 
          var thirdLevelHtml = ''; 
 
          $.each(obj.showClassifyJsons, function (n, val) { 
            if(val.level == 1){ 
              if(val.checked == true){ 
                firstLevelHtml += "<option selected value='"+val.id+"'>"+val.classilyName+"</option>"; 
              }else{ 
                firstLevelHtml += "<option value='"+val.id+"'>"+val.classilyName+"</option>"; 
              } 
 
            }else if(val.level == 2){ 
              if(val.checked == true){ 
                secondLevelHtml += "<option selected value='"+val.id+"'>"+val.classilyName+"</option>"; 
              }else{ 
                secondLevelHtml += "<option value='"+val.id+"'>"+val.classilyName+"</option>"; 
              } 
            }else if(val.level == 3){ 
              if(val.checked == true){ 
                thirdLevelHtml += "<option selected value='"+val.id+"'>"+val.classilyName+"</option>"; 
              }else{ 
                thirdLevelHtml += "<option value='"+val.id+"'>"+val.classilyName+"</option>"; 
              } 
            } 
          }); 
          $("#first_classify").append(firstLevelHtml); 
          $("#second_classify").append(secondLevelHtml); 
          $("#third_classify").append(thirdLevelHtml); 
 
          // 加载普通标签 
          $("div[name='commonTagDom']").html($("#commonTagTemplate").render(obj.commonTagOptionJsons)); 
          // 加载级联标签 
          $("div[name='selectTagDom']").html($("#selectTagTemplate").render(obj.selectTagOptionJsons)); 
        }); 
      }); 
      commonJS.loading("close"); 
    }, 
    "returnSelectedClassifyAndTag":function () { 
      // 获取展示分类ID和搜索标签 
      var classifyName = ''; 
      var classifyId = $("#third_classify").val(); 
      $.each($("#third_classify").find("option"), function (n, val) { 
        if (val.selected) { 
          classifyName = $(val).html(); 
        } 
      }); 
      if (0 == classifyId) { 
        classifyId = $("#second_classify").val(); 
        $.each($("#second_classify").find("option"), function (n, val) { 
          if (val.selected) { 
            classifyName = $(val).html(); 
          } 
        }); 
      } 
      if (0 == classifyId) { 
        classifyId = $("#first_classify").val(); 
        $.each($("#first_classify").find("option"), function (n, val) { 
          if (val.selected) { 
            classifyName = $(val).html(); 
          } 
        }); 
      } 
 
      if (0 != classifyId) { 
        var classify = { 
          "classifyId": 0, 
          'classifyName': '', 
          "searchTags": [] 
        } 
        classify.classifyId = classifyId; 
        classify.classifyName = classifyName; 
        var selectTagDom = $("#selectTagDom"); 
        var commonTagDom = $("#commonTagDom"); 
        var selectTagsEle = selectTagDom.find("input[type='checkbox']"); 
        var commonTagsEle = commonTagDom.find("input[type='checkbox']"); 
        for (var i = 0; i < selectTagsEle.length; i++) { 
          if (selectTagsEle[i].checked) { 
            var searchTag = {}; 
            var optionId = $(selectTagsEle[i]).attr("optionid"); 
            var optionValueId = $(selectTagsEle[i]).attr("valueid"); 
            searchTag.optionId = optionId; 
            searchTag.optionValueId = optionValueId; 
            classify.searchTags.push(searchTag); 
          } 
        } 
        for (var i = 0; i < commonTagsEle.length; i++) { 
          if (commonTagsEle[i].checked) { 
            var searchTag = {}; 
            var optionId = $(commonTagsEle[i]).attr("optionid"); 
            var optionValueId = $(commonTagsEle[i]).attr("valueid"); 
            searchTag.optionId = optionId; 
            searchTag.optionValueId = optionValueId; 
            classify.searchTags.push(searchTag); 
          } 
        } 
        return classify; 
      } 
    } 
  } 
</script>

调用页面的HTML文件中该模块的位置用velocity引用该组件：

#parse("/classify_search_tag.html")

调用页面的js文件中，调用入口方法即可：

新增调用

$(function () {
  goodsClassifyAndSearchTag.getFirstLevelClassify();/** 初始化一级展示分类 **/
});

编辑调用：

$(function () {
  goodsClassifyAndSearchTag.getClassifyAndSearchTag("需要的参数");/** 回显展示类目以及搜索标签 **/
});

获取选中的返回值：

goodsClassifyAndSearchTag.returnSelectedClassifyAndTag()

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