初识EasyUI

Easy UI

首先我们先了解easyui是什么 >>>
easyui是一种基于jQuery的用户界面插件集合

easyui能带给我们什么好处?
1)easyui是个完美支持HTML5网页的完整框架
2)easyui节省网页开发的时间和规模
3)easyui很简单但功能强大

本章节主要讲述以下组件的使用:
1)layout(布局组件)
2)tree(树形组件)
3)tabs(选项卡组件)

功能实现流程
1)使用layout完成后台管理界面布局;
2)通过动态事件绑定Tree组件数据;
3)选中Tree组件中的子节点动态创建Tab页签;

首先我们先进入easyui的在线API下载程序库并导入EasyUI的CSS和Javascript文件到页面。

<link rel="stylesheet" type="text/css" href="easyui/themes/default/easyui.css">   
<link rel="stylesheet" type="text/css" href="easyui/themes/icon.css">   
<script type="text/javascript" src="easyui/jquery-1.7.2.min.js"></script>   
<script type="text/javascript" src="easyui/jquery.easyui.min.js"></script>  

我们导入到页面上后在包的路径前加上全路径名,用全路径名的好处是以防找不到包,导包的顺序必须按上面的导包顺序来,否则就会出现不了本来该有的效果。
${pageContext.request.contextPath }
初识EasyUI_第1张图片
layout 里找到 full copy body部分

<body class="easyui-layout">
	<div data-options="region:'north',border:false" style="height:60px;background:#B3DFDA;padding:10px">north region</div>
	<div data-options="region:'west',split:true,title:'West'" style="width:150px;padding:10px;">
		后台管理界面的菜单
		<ul id="tt"></ul></div>
	<div data-options="region:'east',split:true,collapsed:true,title:'East'" style="width:100px;padding:10px;">east region</div>
	<div data-options="region:'south',border:false" style="height:50px;background:#A9FACD;padding:10px;">south region</div>
	<div data-options="region:'center',title:'Center'"></div>
</body>

导入工具包初识EasyUI_第2张图片
在xml.web进行配置,如果你导的是别人的包记得不要改的路径名

 <filter>
  	<filter-name>encodingFiter</filter-name>
  	<filter-class>com.chen.util.EncodingFiter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>encodingFiter</filter-name>
  	<url-pattern>/*
  
  
  
  	actionServlet
  	com.chen.framework.ActionServlet
  
  
  	actionServlet
  	*.action
  

这样基本的管理界面布局就出来了

Tree-树

TreeNode进行描述创类

package com.chen.entity;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class TreeNode {
	private String id;
	private String text;
	private Map<String, Object> attributes = new HashMap<>();
	private List<TreeNode> children = new ArrayList<>();

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getText() {
		return text;
	}

	public void setText(String text) {
		this.text = text;
	}

	public Map<String, Object> getAttributes() {
		return attributes;
	}

	public void setAttributes(Map<String, Object> attributes) {
		this.attributes = attributes;
	}

	public List<TreeNode> getChildren() {
		return children;
	}

	public void setChildren(List<TreeNode> children) {
		this.children = children;
	}

	public TreeNode(String id, String text, Map<String, Object> attributes, List<TreeNode> children) {
		super();
		this.id = id;
		this.text = text;
		this.attributes = attributes;
		this.children = children;
	}

	public TreeNode() {
		super();
	}

	@Override
	public String toString() {
		return "TreeNode [id=" + id + ", text=" + text + ", attributes=" + attributes + ", children=" + children + "]";
	}

}

MenuDao
继承JsonBaseDao

package com.chen.dao;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.chen.entity.TreeNode;
import com.chen.util.JsonBaseDao;
import com.chen.util.JsonUtils;
import com.chen.util.PageBean;
import com.chen.util.StringUtils;

public class MenuDao extends JsonBaseDao {

	/**
	 * 
	 * @param map
	 *            req.getParameterMap
	 * @param pageBean
	 *            分页
	 * @return
	 * @throws SQLException 
	 * @throws IllegalAccessException 
	 * @throws InstantiationException 
	 */
	public List<TreeNode> list(Map<String, String[]> map, PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException {
		List<Map<String,Object>> ListMenu = this.listMenu(map, pageBean);
		List<TreeNode> treeNodeList = new ArrayList<>();
		menuList2TreeNodeList(ListMenu, treeNodeList);
		
		return treeNodeList;
	}

	/**
	 * 查詢meun表單子节点数据
	 * 
	 * @param map
	 * @param pageBean
	 * @return
	 * @throws SQLException 
	 * @throws IllegalAccessException 
	 * @throws InstantiationException 
	 */
	public List<Map<String, Object>> listMenu(Map<String, String[]> map, PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException {
		String sql = "select * from t_easyui_menu where true";
		String id = JsonUtils.getParamVal(map, "id"); // 获得当前节点的id
		if (StringUtils.isNotBlank(id)) {
			sql = sql + " and parentid = " + id;
		} else {
			sql = sql + " and parentid = -1";// 没有数据则返回根节点
		}

		return super.executeQuery(sql, pageBean);
	}
	
	/**
	 * [{Menuid:1,....[]},{Menuid:2,....[]}]
	 * ->[{id:1,....[]},{id:2,....[]}]
	 * menu表的数据不符合easyui树形展示的数据格式
	 * 需要转换成easyui所能识别的数据格式
	 * @param map
	 * @param treeNode
	 * @throws SQLException 
	 * @throws IllegalAccessException 
	 * @throws InstantiationException 
	 */
	public void menu2TreeNode(Map<String, Object> map,TreeNode treeNode) throws InstantiationException, IllegalAccessException, SQLException {
		treeNode.setId(map.get("Menuid").toString());
		treeNode.setText(map.get("Menuname").toString());
		treeNode.setAttributes(map);
		
//		treeNode.setChildren(children);
		Map<String, String[]> jspMap = new HashMap<>();
		jspMap.put("id", new String[] {treeNode.getId()});
		List<Map<String, Object>> listMenu = this.listMenu(jspMap, null);
		List<TreeNode> treeNodeList = new ArrayList<>();
		menuList2TreeNodeList(listMenu, treeNodeList);
		treeNode.setChildren(treeNodeList);
	} 
	
	public void menuList2TreeNodeList(List<Map<String, Object>>  mapList,List<TreeNode> treeNodeList) throws InstantiationException, IllegalAccessException, SQLException {
		TreeNode treeNode = null;
		for (Map<String, Object> map : mapList) {
			treeNode = new TreeNode();
			menu2TreeNode(map, treeNode);
			treeNodeList.add(treeNode);
		}
	} 
	

}

MenuAction
子控制器

package com.chen.web;

import java.sql.SQLException;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.chen.dao.MenuDao;
import com.chen.entity.TreeNode;
import com.chen.util.ResponseUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zking.framework.ActionSupport;

public class MenuAction extends ActionSupport{

	private MenuDao  menuDao = new MenuDao();
	public String treeMenu(HttpServletRequest req,HttpServletResponse resp) throws Exception {
		
		try {
			List<TreeNode> list = this.menuDao.list(req.getParameterMap(), null);
			ObjectMapper om = new ObjectMapper();
			//将listjihe 转换成json串
			String jsonStr = om.writeValueAsString(list);
			ResponseUtil.write(resp, jsonStr);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		
		return null;
	}
	
	
}

去EasyUI 1.5 版 API 中文版 中导入tree_data1.json
初识EasyUI_第3张图片
写入index.js里的代码

$(function(){
	$("#tt").tree({
		url:'menuAction.action?methodName=treeMenu',
	})
})

效果图
初识EasyUI_第4张图片

Tab页

index.js重写

$(function(){
	$('#tt').tree({    
	    url:'menuAction.action?methodName=treeMenu'  , 
	    onClick:function(node){
	    	var content = '';
	    	if ($('#menuTabs').tabs('exists',node.text)) {
	    		$('#menuTabs').tabs('select',node.text)
			} else {
				$('#menuTabs').tabs('add',{    
		    	    title:node.text,    
		    	    content:content,    
		    	    closable:true,    
		    	    tools:[{    
		    	        iconCls:'icon-mini-refresh',    
		    	        handler:function(){    
		    	            alert('refresh');    
		    	        }    
		    	    }]    
		    	});  
			}

	    }
	});  

})

index.jsp加入tab样式

<body class="easyui-layout">
	<div data-options="region:'north',border:false"
		style="height: 60px; background: #B3DFDA; padding: 10px">north
		region</div>
	<div data-options="region:'west',split:true,title:'West'"
		style="width: 150px; padding: 10px;">
		后台管理界面的菜单
		<ul id="tt"></ul>
	</div>
	<div
		data-options="region:'east',split:true,collapsed:true,title:'East'"
		style="width: 100px; padding: 10px;">east region</div>
	<div data-options="region:'south',border:false"
		style="height: 50px; background: #A9FACD; padding: 10px;">south
		region</div>
	<div data-options="region:'center',title:'Center'">
		<div id="menuTabs" class="easyui-tabs" style="">
			<div title="Tab1" style="padding: 20px; display: none;">
			欢迎使用</div>

		</div>

	</div>
</body>

初识EasyUI_第5张图片
思路:
导航面板——-》分类容器(控件)——-》小面板——-》树(tree)——-》叶节点

欧克,这样我们就完成了

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