E3.Tree参考手册(v0.1)
简介
E3.Tree是E3平台下一个用于构造树型UI(menu,tree,outlookbar等)的的组件,开发这个组件的主要目的有两点：
1. 重用树型UI的构造过程，简化树型UI的开发
2. 建立起一致的树型UI开发模式
系统要求
JDK1.4X
TOMCAT5.X (其他未测试)
样例部署
示例组图:
使用
Lib文件清单
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文件名
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版本
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说明
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E3-Tree.jar
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1.0
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E3平台的树
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E3-TemplateEngine.ja
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1.0
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E3平台的模板引擎Adapter
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commons-logging.jar
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1.04
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Apache的commons log,
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log4j-1.2.14.jar
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1.2.14
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Apache的log4j
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velocity-1.4.jar
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1.4
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Apache的模板引擎
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添加JAR到classpath中
把Lib文件清单中的jar全部添加到classpath中
web.xml配置
添加导入js 等UI资源的监听器
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<listener></listener>
<listener-class></listener-class>
net.jcreate.e3.tree.loader.LoadResourcesListener
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控制器Servlet
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protected void service(HttpServletRequest pRequest, HttpServletResponse pResponse) throws ServletException, IOException {
//业务数据
List orgs = new ArrayList();
Org jcjtOrg = new Org("001",null,"进创集团", 1);
Org jcrjOrg = new Org("001001","001","进创软件", 1);
Org xrjOrg = new Org("0010010011","001001","X软件公司", 1);
Org yrjOrg = new Org("0010010012","001001","Y软件公司", 2);
Org zrjOrg = new Org("0010010013","001001","Z软件公司", 3);
orgs.add(jcjtOrg);
orgs.add(jcrjOrg);
orgs.add(xrjOrg);
orgs.add(yrjOrg);
orgs.add(zrjOrg);
//业务数据解码器，从业务数据中分解出id和parentid
UserDataUncoder orgUncoder = new UserDataUncoder(){
public Object getID(Object pUserData) throws UncodeException {
Org org = (Org)pUserData;
return org.getId();
}
public Object getParentID(Object pUserData) throws UncodeException {
Org org = (Org)pUserData;
return org.getParentId();
}
};
//Tree模型构造器，用于生成树模型
AbstractWebTreeModelCreator treeModelCreator =
new AbstractWebTreeModelCreator(){
//该方法负责将业务数据映射到树型节点
protected Node createNode(Object pUserData, UserDataUncoder pUncoder) {
Org org = (Org)pUserData;
WebTreeNode result = new WebTreeNode(org.getName(), "org" + org.getId());
//action是点击按纽执行的方法.可以是url,或者javascript函数
result.setAction("javascript:alert(' " + org.getName() + "')");
return result;
}
};
treeModelCreator.init(pRequest);
TreeModel treeModel = treeModelCreator.create(orgs,orgUncoder);
TreeDirector director = new DefaultTreeDirector();//构造树导向器
WebTreeBuilder treeBuilder = new XTreeBuilder();//构造树Builder
treeBuilder.init(pRequest);
director.build(treeModel, treeBuilder);//执行构造
String treeScript = treeBuilder.getTreeScript();//获取构造树的脚本
pRequest.setAttribute("treeScript", treeScript);//保存到request,以便页面使用
pRequest.getRequestDispatcher("/e3/samples/tree/XTree.jsp").forward(pRequest,pResponse);
}
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这里我们构造是普通树，如果要构造带checkbox/radiobox的树,只需要将
WebTreeBuilder treeBuilder = new XTreeBuilder()
这行代码换成
WebTreeBuilder treeBuilder = new CheckXTreeBuilder ()
或
WebTreeBuilder treeBuilder = new RadioXTreeBuilder ()
即可
JSP页面
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%@ page contentType="text/html; charset=utf-8"%>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
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