ofbiz学习—

这篇文章介绍主页中左边的分类树是如何实现的。

1. 首先打开主页，https://localhost:8443/ecommerce/control/main

2.找到上面分类树界面对应的html源码。可以看到开始是以 component://ecommerce/widget/CatalogScreens.xml#productCategories 开始的。

3.打开component://ecommerce/widget/CatalogScreens.xml#productCategories

    <screen name="productCategories"><section><actions><set field="tabButtonItem" value="LookupProductCategories"/><script location="component://ecommerce/groovyScripts/catalog/ProductCategories.groovy"/></actions><widgets><platform-specific><html><html-template location="component://ecommerce/template/catalog/ProductCategories.ftl"/></html></platform-specific></widgets></section></screen>

打开component://ecommerce/groovyScripts/catalog/ProductCategories.groovy

/** This script is also referenced by the ecommerce's screens and* should not contain order component's specific code.*/
import org.apache.ofbiz.entity.util.EntityUtilimport org.apache.ofbiz.base.util.*
import org.apache.ofbiz.product.catalog.*
import org.apache.ofbiz.product.category.*
import org.apache.ofbiz.entity.*List fillTree(rootCat ,CatLvl, parentCategoryId) {if(rootCat) {rootCat.sort{ it.productCategoryId }def listTree = []for(root in rootCat) {preCatChilds = from("ProductCategoryRollup").where("parentProductCategoryId", root.productCategoryId).queryList()catChilds = EntityUtil.getRelated("CurrentProductCategory",null,preCatChilds,false)def childList = []// CatLvl uses for identify the Category level for display different css classif(catChilds) {if(CatLvl==2)childList = fillTree(catChilds,CatLvl+1, parentCategoryId.replaceAll("/", "")+'/'+root.productCategoryId)// replaceAll and '/' uses for fix bug in the breadcrum for href of categoryelse if(CatLvl==1)childList = fillTree(catChilds,CatLvl+1, parentCategoryId.replaceAll("/", "")+root.productCategoryId)elsechildList = fillTree(catChilds,CatLvl+1, parentCategoryId+'/'+root.productCategoryId)}productsInCat  = from("ProductCategoryAndMember").where("productCategoryId", root.productCategoryId).queryList()// Display the category if this category containing products or contain the category that's containing productsif(productsInCat || childList) {def rootMap = [:]category = from("ProductCategory").where("productCategoryId", root.productCategoryId).queryOne()categoryContentWrapper = new CategoryContentWrapper(category, request)context.title = categoryContentWrapper.get("CATEGORY_NAME", "html")categoryDescription = categoryContentWrapper.get("DESCRIPTION", "html")if(categoryContentWrapper.get("CATEGORY_NAME", "html").toString())rootMap["categoryName"] = categoryContentWrapper.get("CATEGORY_NAME", "html")elserootMap["categoryName"] = root.categoryNameif(categoryContentWrapper.get("DESCRIPTION", "html").toString())rootMap["categoryDescription"] = categoryContentWrapper.get("DESCRIPTION", "html")elserootMap["categoryDescription"] = root.descriptionrootMap["productCategoryId"] = root.productCategoryIdrootMap["parentCategoryId"] = parentCategoryIdrootMap["child"] = childListlistTree.add(rootMap)}}return listTree}
}CategoryWorker.getRelatedCategories(request, "topLevelList", CatalogWorker.getCatalogTopCategoryId(request, CatalogWorker.getCurrentCatalogId(request)), true)
curCategoryId = parameters.category_id ?: parameters.CATEGORY_ID ?: ""
request.setAttribute("curCategoryId", curCategoryId)
CategoryWorker.setTrail(request, curCategoryId)categoryList = request.getAttribute("topLevelList")
if (categoryList) {catContentWrappers = [:]CategoryWorker.getCategoryContentWrappers(catContentWrappers, categoryList, request)context.catContentWrappers = catContentWrapperscompletedTree = fillTree(categoryList, 1, "")context.completedTree = completedTree
}

打开component://ecommerce/template/catalog/ProductCategories.ftl

<script language="javascript" type="text/javascript"src="<@ofbizContentUrl>/images/jquery/plugins/jsTree/jquery.jstree.js</@ofbizContentUrl>"></script>
<script type="text/javascript"src="<@ofbizContentUrl>/images/jquery/ui/js/jquery.cookie-1.4.0.js</@ofbizContentUrl>"></script><script type="text/javascript"><#-- some labels are not unescaped in the JSON object so we have to do this manuely -->function unescapeHtmlText(text) {return jQuery('<div />').html(text).text()}jQuery(window).load(createTree());<#-- creating the JSON Data -->var rawdata = [<#if (requestAttributes.topLevelList)??><#assign topLevelList = requestAttributes.topLevelList></#if><#if (topLevelList?has_content)><@fillTree rootCat=completedTree/></#if><#macro fillTree rootCat><#if (rootCat?has_content)><#list rootCat?sort_by("productCategoryId") as root>{"data": {"title": unescapeHtmlText("<#if root.categoryName??>${root.categoryName?js_string}<#elseif root.categoryDescription??>${root.categoryDescription?js_string}<#else>${root.productCategoryId?js_string}</#if>"),"attr": {"href": "javascript: void(0);","onClick": "callDocument('${root.productCategoryId}', '${root.parentCategoryId}')","class": "${root.cssClass!}"}},"attr": {"id": "${root.productCategoryId}"}<#if root.child?has_content>, "children": [<@fillTree rootCat=root.child/>]</#if><#if root_has_next>},<#else>}</#if></#list></#if></#macro>];<#-------------------------------------------------------------------------------------define Requests-->var editDocumentTreeUrl = '<@ofbizUrl>/views/EditDocumentTree</@ofbizUrl>';var listDocument = '<@ofbizUrl>/views/ListDocument</@ofbizUrl>';var editDocumentUrl = '<@ofbizUrl>/views/EditDocument</@ofbizUrl>';var deleteDocumentUrl = '<@ofbizUrl>removeDocumentFromTree</@ofbizUrl>';<#-------------------------------------------------------------------------------------create Tree-->function createTree() {jQuery(function () {jQuery("#tree").jstree({"themes": {"theme": "classic","icons": false},"cookies": {"cookie_options": {path: '/'}},"plugins": ["themes", "json_data", "cookies"],"json_data": {"data": rawdata}});});}<#-------------------------------------------------------------------------------------callDocument function-->function callDocument(id, parentCategoryStr) {var checkUrl = '<@ofbizUrl>productCategoryList</@ofbizUrl>';if (checkUrl.search("http"))var ajaxUrl = '<@ofbizUrl>productCategoryList</@ofbizUrl>';elsevar ajaxUrl = '<@ofbizUrl>productCategoryListSecure</@ofbizUrl>';//jQuerry Ajax RequestjQuery.ajax({url: ajaxUrl,type: 'POST',data: {"category_id": id, "parentCategoryStr": parentCategoryStr},error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {jQuery('#div3').html(msg);}});}<#-------------------------------------------------------------------------------------callCreateDocumentTree function-->function callCreateDocumentTree(contentId) {jQuery.ajax({url: editDocumentTreeUrl,type: 'POST',data: {contentId: contentId,contentAssocTypeId: 'TREE_CHILD'},error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {jQuery('#Document').html(msg);}});}<#-------------------------------------------------------------------------------------callCreateSection function-->function callCreateDocument(contentId) {jQuery.ajax({url: editDocumentUrl,type: 'POST',data: {contentId: contentId},error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {jQuery('#Document').html(msg);}});}<#-------------------------------------------------------------------------------------callEditSection function-->function callEditDocument(contentIdTo) {jQuery.ajax({url: editDocumentUrl,type: 'POST',data: {contentIdTo: contentIdTo},error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {jQuery('#Document').html(msg);}});}<#-------------------------------------------------------------------------------------callDeleteItem function-->function callDeleteDocument(contentId, contentIdTo, contentAssocTypeId, fromDate) {jQuery.ajax({url: deleteDocumentUrl,type: 'POST',data: {contentId: contentId,contentIdTo: contentIdTo,contentAssocTypeId: contentAssocTypeId,fromDate: fromDate},error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {location.reload();}});}<#-------------------------------------------------------------------------------------callRename function-->function callRenameDocumentTree(contentId) {jQuery.ajax({url: editDocumentTreeUrl,type: 'POST',data: {contentId: contentId,contentAssocTypeId: 'TREE_CHILD',rename: 'Y'},error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {jQuery('#Document').html(msg);}});}<#------------------------------------------------------pagination function -->function nextPrevDocumentList(url) {url = '<@ofbizUrl>'+ url+'</@ofbizUrl>';jQuery.ajax({url: url,type: 'POST',error: function (msg) {alert("An error occurred loading content! : " + msg);},success: function (msg) {jQuery('#Document').html(msg);}});}</script><div id="quickadd" class="screenlet"><div class="screenlet-title-bar"><ul><li class="h3">${uiLabelMap.ProductCategories}</li></ul></div><div class="screenlet-body" id="tree"></div>
</div>

数据填充部分主要看<#-- creating the JSON Data -->那一块。看rawdata是如何组织的。

分析ProductCategories.groovy代码：

1. CatalogWorker.getCurrentCatalogId(request)

这个应该是获取当前目录id。默认是DemoCatalog

2. CategoryWorker.getRelatedCategories(request, "topLevelList", CatalogWorker.getCatalogTopCategoryId(request, CatalogWorker.getCurrentCatalogId(request)), true)

查看源码CategoryWorker.getRelatedCategories

public static String getCatalogTopCategoryId(ServletRequest request, String prodCatalogId) {if (UtilValidate.isEmpty(prodCatalogId)) return null;List<GenericValue> prodCatalogCategories = getProdCatalogCategories(request, prodCatalogId, "PCCT_BROWSE_ROOT");if (UtilValidate.isNotEmpty(prodCatalogCategories)) {GenericValue prodCatalogCategory = EntityUtil.getFirst(prodCatalogCategories);return prodCatalogCategory.getString("productCategoryId");} else {return null;}}

可以知道实际执行的sql语句是：

SELECT * FROM Prod_Catalog_Category t WHERE t.prod_catalog_id='DemoCatalog' AND t.prod_catalog_category_type_id='PCCT_BROWSE_ROOT'

结果如下：

查询结果会放入request的topLevelList属性里。即categoryList就是上面的查询结果。这个例子的查询结果只有一条记录。

3.接下来重点看fillTree方法。

3.1 for(root in rootCat) { //由于categoryList结果只有一条记录，所以for只会循环一次。

3.2 preCatChilds = from("ProductCategoryRollup").where("parentProductCategoryId", root.productCategoryId).queryList() 等价于

SELECT * FROM Product_Category_Rollup WHERE parent_Product_Category_Id='CATALOG1'

root.productCategoryId的取值就是上面 categoryList结果的product_Category_Id字段的值。

结果显示：

3.3 catChilds = EntityUtil.getRelated("CurrentProductCategory",null,preCatChilds,false)

这行代码是根据preCatChilds关联对应的分类记录。等价于下面sql的查询结果：

SELECT t2.* FROM Product_Category_Rollup t1
INNER JOIN Product_Category t2 ON t1.Product_Category_id = t2.Product_Category_id
WHERE t1.parent_Product_Category_Id='CATALOG1'

结果显示：

3.4 递归调用获取分类的子分类。

// CatLvl uses for identify the Category level for display different css classif(catChilds) {if(CatLvl==2)childList = fillTree(catChilds,CatLvl+1, parentCategoryId.replaceAll("/", "")+'/'+root.productCategoryId)// replaceAll and '/' uses for fix bug in the breadcrum for href of categoryelse if(CatLvl==1)childList = fillTree(catChilds,CatLvl+1, parentCategoryId.replaceAll("/", "")+root.productCategoryId)elsechildList = fillTree(catChilds,CatLvl+1, parentCategoryId+'/'+root.productCategoryId)}

第一次执行时CatLvl是等于1.

SELECT t2.* FROM Product_Category_Rollup t1
INNER JOIN Product_Category t2 ON t1.Product_Category_id = t2.Product_Category_id
WHERE t1.parent_Product_Category_Id=?

上面的参数？表示catChilds列表每条记录的产品分类id即Product_Category_id，取值有：100，200，dropShip，FA-100，FOOD-001，GC-100，PC-100，SERV-001 八条记录循环遍历。

3.5 构造rootMap。

rootMap的主要属性有：categoryName，categoryDescription，productCategoryId，parentCategoryId，child，cssClass

研究了很久，发现下面三条记录的category_name和description字段都为null，而分类树中确显示Configurables Foods，Gift Cards，Configurables PCs。不知道这些内容是哪里来的，找了好久也没找到，暂时先不管了。以后有时间再研究。

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