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最近项目在做一个电商网站,网站涉及到前后台交互的多条件查询,类似于淘宝的多条件查询,图片如下
此类查询主要涉及到的问题有:
1.如何记忆查询参数
2.如何前后台传值
3.中文处理
。
解答:
1:通过从后台返回之前查询参数(网上有在session中记忆参数,也有用数组记忆,这里我选用了淘宝的方式:url返回参数记忆)
2:通过url方式传值,并且需要注意拼接格式
3:前台进行utf8编码,后台进行utf8解码(特别注意:之前记忆的参数通过后台再返回前台,一定要对参数进行解码在编码后进行返回,否则会出现乱码,不过也有可能是我代码的问题)
详细代码如下:
一、前台查询框展示代码:(查询条件都是从后台拉取的集合)
<div class = "category"> <div> <c:if test="${param.name ne null }">${param.name }</c:if> <a ><c:if test="${requestScope.content eq '' or requestScope.content eq null }"><h3> 全部商品 - 商品筛选</h3></c:if> <c:if test="${requestScope.content ne '' and requestScope.content ne null }"> <h3> ${requestScope.content } - 商品筛选</h3></c:if></a> </div> <!-- <dl style=" border-color: #E2E2E2; border-image: none; border- 0 1px 1px; 900px;padding-left: 10px; padding: 10px;" id="manyC" class="manyC"> --> <ul class="select"> <li class="select-list"> <c:forEach items="${typePropertys }" var="pro" varStatus="stat" begin="0" end="20"> <dl id="select${stat.index+1}"> <dt style="float:left;">${pro.propertyName }:</dt> <dd class="select-all selected"> <a href="javascript:void(0);" onclick="quanbu(${stat.index})">全部</a></dd> <c:forEach items="${fn:split(pro.content,",") }" var="proName" varStatus="stat2"> <dd> <a id="${stat.index}${stat2.index}" href="javascript:void(0);" onclick="bb(${stat.index},${stat2.index},'${proName }')">${proName }</a> </dd> </c:forEach> </dl> </c:forEach> </li> </ul> <%--通过记忆的property来刷新页面时显示之前已筛选的property --%> <script type="text/javascript"> var propertystring = '<%=request.getAttribute("property")%>'; <%--","拆分字符串,一级拆分 --%> var arg1 = propertystring.split(","); for(var i=0 ; i<arg1.length ; i++){ <%--":"拆分字符串,二级拆分 --%> var arg2 = arg1[i].split(":")[0]; $("#"+arg2).parent().addClass("selected").siblings().removeClass("selected"); } </script> </div>
二、涉及到的JS方法(重点)
显示之前记忆的查询条件
<script type="text/javascript"> var propertystring = '<%=request.getAttribute("property")%>'; <%--","拆分字符串,一级拆分 --%> var arg1 = propertystring.split(","); for(var i=0 ; i<arg1.length ; i++){ <%--":"拆分字符串,二级拆分 --%> var arg2 = arg1[i].split(":")[0]; $("#"+arg2).parent().addClass("selected").siblings().removeClass("selected"); } </script>
点击新的查询条件事件
<script type="text/javascript"> function bb(num,con,proname){ proname = encodeURI(proname); proname = encodeURI(proname); var propertystring = '<%=request.getAttribute("property")%>'; var newstring = ""; var notnullstring = ""; var flag = 0; if(propertystring != "null" && propertystring != ""){ var arg1 = propertystring.split(","); <%-- 当选择同行时,进行修改,当选择不同行时,先判断整个for循环中有无同行,循环完无同行添加--%> for(var i=0 ; i<arg1.length ; i++){ var arg2 = arg1[i].split(":")[0].split("")[0]; //在同一排时,替换同一排,标志位置为1,否则为添加,标志位为0 if(parseInt(arg2) == parseInt(num)){ var newId = num+''+con; arg1[i] = newId + '' + ":" + proname; flag = 1; } } for(var j=0 ; j<arg1.length ; j++){ if(j==0){ notnullstring += arg1[j]; } else{ notnullstring += ","+arg1[j]; } } if(flag == 0){ var newId = num+''+con; newstring = ","+newId + '' + ":" + proname; notnullstring += newstring ; } window.location.href = "<%=path %>/list/goodsList.html?sellType=1&order=0&pageNo=0&orderType=0&goodsCatId=<%=request.getAttribute("property")%>&property="+notnullstring; } else{ newstring = num+''+con+":"+proname; window.location.href = "<%=path %>/list/goodsList.html?sellType=1&order=0&pageNo=0&orderType=0&goodsCatId=<%=request.getAttribute("property")%>&property="+newstring; } } function quanbu(num){ var notnullstring = ""; var propertystring = '<%=request.getAttribute("property")%>'; var flag = 0; for(var i=0 ; i<arg1.length ; i++){ var arg2 = arg1[i].split(":")[0].split("")[0]; if(parseInt(arg2) == parseInt(num)){ arg1[i] = ""; } } for(var j=0 ; j<arg1.length ; j++){ if(j==0){ if(arg1[j] == ""){ notnullstring += ""; flag = 1; } else notnullstring += arg1[j]; } else{ if(arg1[j]=="") notnullstring += ""; else { if(flag == 0) notnullstring += ","+arg1[j]; else { notnullstring += arg1[j]; flag = 0; } } } } window.location.href = "<%=path %>/list/goodsList.html?sellType=1&order=0&pageNo=0&orderType=0&goodsCatId=<%=request.getAttribute("property")%>&property="+notnullstring; } </script>
这里href调用的事html页,而html页有<s:action>方法,所以直接可以访问方法
三、后台方法
</pre><pre name="code" class="java"> if (property != null && !(property.equals(""))) { String[] arg1 = property.split(","); for (int i = 0; i < arg1.length; i++) { String[] arg2 = arg1[i].split(":"); String beforeNum = arg2[0]; String afterText = URLDecoder.decode( URLDecoder.decode(arg2[1], "utf-8"), "utf-8"); if(i<arg1.length-1){ ex_property += afterText + ","; ex_propertyNum += beforeNum+","; } else { ex_property += afterText; ex_propertyNum += beforeNum; } } String[] ex_arg1 = ex_property.split(","); String[] ex_arg2 = ex_propertyNum.split(","); for (int j = 0; j < ex_arg1.length; j++) { if(j<ex_arg1.length-1) return_property += ex_arg2[j]+":"+URLEncoder.encode( URLEncoder.encode(ex_arg1[j], "utf-8"), "utf-8")+","; else return_property += ex_arg2[j]+":"+URLEncoder.encode( URLEncoder.encode(ex_arg1[j], "utf-8"), "utf-8"); } ServletActionContext.getRequest().setAttribute("property", return_property); }
这里return_property 为 需要重新返回到前台记忆的参数,ex_property为已解码的查询参数。
最后是CSS和相对不重要的JS
这里写死了点击样式条件数为7个....还不清楚如何动态确定点击样式
$(document).ready(function(){ $("#select1 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectA").remove(); } else { var copyThisA = $(this).clone(); if ($("#selectA").length > 0) { $("#selectA a").html($(this).text()); } else { $(".select-result dl").append(copyThisA.attr("id", "selectA")); } } }); $("#select2 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectB").remove(); } else { var copyThisB = $(this).clone(); if ($("#selectB").length > 0) { $("#selectB a").html($(this).text()); } else { $(".select-result dl").append(copyThisB.attr("id", "selectB")); } } }); $("#select3 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectC").remove(); } else { var copyThisC = $(this).clone(); if ($("#selectC").length > 0) { $("#selectC a").html($(this).text()); } else { $(".select-result dl").append(copyThisC.attr("id", "selectC")); } } }); $("#select4 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectD").remove(); } else { var copyThisD = $(this).clone(); if ($("#selectD").length > 0) { $("#selectD a").html($(this).text()); } else { $(".select-result dl").append(copyThisD.attr("id", "selectD")); } } }); $("#select5 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectE").remove(); } else { var copyThisE = $(this).clone(); if ($("#selectE").length > 0) { $("#selectE a").html($(this).text()); } else { $(".select-result dl").append(copyThisE.attr("id", "selectE")); } } }); $("#select6 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectF").remove(); } else { var copyThisF = $(this).clone(); if ($("#selectF").length > 0) { $("#selectF a").html($(this).text()); } else { $(".select-result dl").append(copyThisF.attr("id", "selectF")); } } }); $("#select7 dd").click(function () { $(this).addClass("selected").siblings().removeClass("selected"); if ($(this).hasClass("select-all")) { $("#selectG").remove(); } else { var copyThisF = $(this).clone(); if ($("#selectG").length > 0) { $("#selectG a").html($(this).text()); } else { $(".select-result dl").append(copyThisG.attr("id", "selectG")); } } }); $("#selectA").live("click", function () { $(this).remove(); $("#select1 .select-all").addClass("selected").siblings().removeClass("selected"); }); $("#selectB").live("click", function () { $(this).remove(); $("#select2 .select-all").addClass("selected").siblings().removeClass("selected"); }); $("#selectC").live("click", function () { $(this).remove(); $("#select3 .select-all").addClass("selected").siblings().removeClass("selected"); }); $("#selectD").live("click", function () { $(this).remove(); $("#select4 .select-all").addClass("selected").siblings().removeClass("selected"); }); $("#selectE").live("click", function () { $(this).remove(); $("#select5 .select-all").addClass("selected").siblings().removeClass("selected"); }); $("#selectF").live("click", function () { $(this).remove(); $("#select6 .select-all").addClass("selected").siblings().removeClass("selected"); }); $("#selectG").live("click", function () { $(this).remove(); $("#select7 .select-all").addClass("selected").siblings().removeClass("selected"); }); $(".select dd").live("click", function () { if ($(".select-result dd").length > 1) { $(".select-no").hide(); } else { $(".select-no").show(); } }); });
CSS样式
.select li{list-style:none;padding:10px 0 5px 0px} .select .select-list{border-bottom:#eee 1px dashed} .select dl{zoom:1;position:relative;line-height:24px;} .select dl:after{content:" ";display:block;clear:both;height:0;overflow:hidden} .select dd{float:left;display:inline;margin:0 0 5px 5px;} .select a{display:inline-block;white-space:nowrap;height:24px;padding:0 10px;text-decoration:none;color:#039;border-radius:2px;} .select a:hover{color:#f60;background-color:#f3edc2} .select .selected a{color:#fff;background-color:#CCCCCC} .select-result dt{font-weight:bold} .select-no{color:#999} .select .select-result a{padding-right:20px;background:#f60 url("../img/close.gif") right 9px no-repeat} .select .select-result a:hover{background-position:right -15px}
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