我用的dojo是1.9版本的,所以使用新的store。
创建一棵最简单的树需要如下几个环节:
1、创建一个store,并为其实现getChildren方法(获取指定节点的子节点,数据层面)。
2、使用创建的store创建一个Model,Model只能是ObjectStoreModel。创建Model的时候一定要指定一个query配置项,该配置项决定了树的根,根必须是唯一。
3、使用Model创建Tree。
4、调用Tree的startup方法, 这一步根据实际情况决定是否需要。
对应代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>测试用例</title> <style type="text/css"> @import "dojo/dojo/resources/dojo.css"; @import "dojo/dijit/themes/tundra/tundra.css"; *{margin:0;padding:0;font-family:微软雅黑;font-size:10pt;} .earth{border-right:4px solid #DFDFDF; border-bottom:4px solid #DFDFDF; height:100%;width:200px;} </style> <script type="text/javascript" djConfig=" isDebug: false" src="dojo/dojo/dojo.js"></script> </head> <script type="text/javascript"> require(["dijit/Tree","dojo/store/Memory","dijit/tree/ObjectStoreModel","dojo/dom","dojo/domReady!"],function(Tree,Memory,ObjectStoreModel,dom) { var treeData= [ {"id":"world","name":"地球","type":"planet","population":"6 billion"},{"id":"AS","name":"亚洲","type":"continent","parent":"world"},{"id":"OZ","name":"欧洲",{"id":"NA","name":"北美",{"id":"SA","name":"南美","parent":"world","checked":"true"},{"id":"HG","name":"韩国","type":"country","parent":"AS"},{"id":"JP","name":"日本",{"id":"CN","name":"中国",{"id":"YD","name":"印度",{"id":"JND","name":"俄罗斯",{"id":"HK","name":"香港","type":"city","parent":"CN"},{"id":"BJ","name":"北京",{"id":"FR","name":"广州",{"id":"HN","name":"湖南",{"id":"CS","name":"长沙","type":"tour","parent":"HN"},{"id":"YY","name":"岳阳","parent":"HN"} ]; var myStore = new Memory({ // 创建store data : treeData,getChildren: function(object){ // 实现getChildren方法 return this.query({parent: this.getIdentity(object)}); } }); var treeModel = new ObjectStoreModel({ // 使用store创建model store: myStore,query: {id: 'world'} }); var tree = new Tree({ // 创建树 id : "tree",// 树id,可以根据该id使用registry模块的byId方法获取组件对象。 model : treeModel,showRoot : true,// 是否显示树根 openOnClick : true,// 单击展开 persist: true,// 持久化到cookie,记住上次打开树时候的状态 autoExpand : false,// 自动展开所有层次的节点 openOnDblClick : true // 双击展开 },"countryData"); tree.startup(); }); </script> <body class="tundra"> <div class="earth"> <div id="countryData" ></div> </div> </body> </html>
本地文件目录显示:有点小bug,但是功能及泵实现了。最好利用Ajax,点击每一层目录的时候才去查询对应子目录,类似于城市级联。本程序没有使用。(dojo放在WebContent目录下)。
indexAction用于跳转index.jsp。
DirFile为领域模型层
package com.xuzengqiang.tree.domain; public class DirFile { private String fileName; //文件名称,name:fileName private String filepath; //文件路径,id:filePath private String parentFileName; //父文件路径: parent:parentFileName public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } public String getParentFileName() { return parentFileName; } public void setParentFileName(String parentFileName) { this.parentFileName = parentFileName; } public String getFilepath() { return filepath; } public void setFilepath(String filepath) { this.filepath = filepath; } }LoadAllFiles,用于读取某个文件下的所有文件。
package com.xuzengqiang.tree.utils; import java.io.File; import java.util.ArrayList; import java.util.List; import com.xuzengqiang.tree.domain.DirFile; public class LoadAllFiles { //获取某个盘下面的所有目录 public static List<DirFile> getAllFiles(String dir) { List<DirFile> dirFile=new ArrayList<DirFile>(); File parentFile=new File(dir); initFile(parentFile,dirFile ); return dirFile; } public static void initFile(File parentFile,List<DirFile> dirFile) { File[] subFiles=parentFile.listFiles(); if(subFiles!=null) { for (File subFile : subFiles) { DirFile file=new DirFile(); file.setFilepath(subFile.getAbsolutePath()); file.setFileName(subFile.getName()); file.setParentFileName(parentFile.getAbsolutePath()); dirFile.add(file); if(subFile.isDirectory()) { initFile(subFile,dirFile); } } } } }DirFileAction:用于Ajax
package com.xuzengqiang.tree.struts.action; import java.io.PrintWriter; import java.util.List; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ActionSupport; import com.xuzengqiang.tree.domain.DirFile; import com.xuzengqiang.tree.utils.LoadAllFiles; @SuppressWarnings("serial") public class DirFileAction extends ActionSupport { private String pathName; public String getPathName() { return pathName; } public void setPathName(String pathName) { this.pathName = pathName; } @Override public String execute() throws Exception { HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=UTF-8"); response.setHeader("Parma","0"); response.setHeader("Cache-Control","no-cache"); response.setDateHeader("Expiress",0); PrintWriter out = response.getWriter(); List<DirFile> dirFile = LoadAllFiles.getAllFiles(pathName); StringBuffer buffer = new StringBuffer(); for (int i = 0; i < dirFile.size(); i++) { buffer.append("["); buffer.append(dirFile.get(i).getFilepath()); buffer.append(","); buffer.append(dirFile.get(i).getFileName()); buffer.append(","); buffer.append(dirFile.get(i).getParentFileName()); buffer.append("]"); } String dirFiles = buffer.toString(); out.print(dirFiles); out.flush(); out.close(); return null; } }
index.jsp页面。主要是dojoAjax的实现,利用dojo.request,
参数:第一个、必需的参数是请求的URL。第二个参数是一个包含请求选项的对象(非必需)。常用的选项有下面几个:
method--代表HTTP方法的大写字符串。dojo提供了几个帮助函数来更方便的指定这个选项(request.get,request.post,request.put,request.del)。
sync--布尔值。true:同步请求方式,请求阻塞知道服务区返回响应或者超时;fasle:异步请求方式。
query--附加在URL后面的查询参数,可以是一个字符串或者键值对。
data--字符串或者键值对,或者FormData对象,它们包含要发送给服务器的数据。
handleAs--代表如何转化服务器响应中负载(或者叫响应数据)的字符串。经过转化的服务器响应数据才会传递给回调函数。可能的格式是“text"(默认值),"json","javascript"和”xml"。
headers--包含请求头的键值对。
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <html> <head> <title>测试用例</title> <style type="text/css"> @import "dojo/dojo/resources/dojo.css"; @import "dojo/dijit/themes/tundra/tundra.css"; *{margin:0;padding:0;font-family:微软雅黑;font-size:10pt;} .earth{border-right:4px solid #DFDFDF; border-bottom:4px solid #DFDFDF;width:900px;} </style> <script type="text/javascript" djConfig=" isDebug: false" src="dojo/dojo/dojo.js"></script> </head> <script type="text/javascript"> require([ "dijit/Tree","dojo/request","dojo/domReady!" ],request) { var pathName="D:\\Maven"; //同样做为根路径 request.post("${pageContext.request.contextPath}/dirFileAction",{ data: { pathName:pathName },handleAs:"text" }).then(function(text) { var treeData= [ {"id":pathName,"name":pathName} ]; var myStore = new Memory( { data : treeData,getChildren: function(object) { return this.query({parent: this.getIdentity(object)}); } }); var dirFiles=text.split("]"); for(var i=0;i<dirFiles.length-1;i++) { var dirFile=dirFiles[i].split(","); var filePath=dirFile[0].substr(1); //文件的绝对路径作为id var fileName=dirFile[1]; //文件名作为显示 var parentFileName=dirFile[2]; //父文件名,同样为绝对路径 myStore.add({"id":filePath,"name":fileName,"parent":parentFileName}); } var treeModel = new ObjectStoreModel( { store: myStore,query: {id:pathName} }); var tree = new Tree( { id : "tree",model : treeModel,openOnClick : true,persist: true,autoExpand : false,openOnDblClick : true },"fileTree"); tree.startup(); }); }); </script> <body class="tundra"> <div class="earth"> <div id="fileTree" ></div> </div> </body> </html>结果视图:
原文链接:https://www.f2er.com/dojo/291214.html