初入easyui
easyui就是一个前端框架，JQuery EasyUI是一组基于jQuery的UI插件集合体,而jQuery EasyUI的目标就是帮助web开发者更轻松的打造出功能丰富并且美观的UI界面.开发者不需要编写复杂的javascript,也不需要对css样式有深入的了解,开发者需要了解的只有一些简单的html标签，一大段废话，通俗一点，就是简化开发，它是一个框架，和jQuery只是一个js类库。
首先我们要先引入easyui：
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/easyui5/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/easyui5/themes/icon.css">
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/easyui5/jquery.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/easyui5/jquery.easyui.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/index.js"></script>
引入的顺序一定不能乱，最后一个是我自己写的一个js文件：
咱们写一下tabs和tree两者相结合的：
$(function(){
$('#tt').tree({
url:'MenuAction.action?methodName=treeMenu' ,
onClick:function(node){
var content = '<iframe scrolling="no" frameborder="0" src="'+node.attributes.menuURL+'" width="99%" height="99%"></iframe>';
if($('#menuTabs').tabs('exists',node.text)){
$('#menuTabs').tabs('select',node.text)
}
else{
$('#menuTabs').tabs('add',{
title:node.text,
content:content,
closable:true,
tools:[{
iconCls:'icon-mini-refresh',
handler:function(){
alert('refresh');
}
}]
});
}
}
});
})
在jsp界面是这样子
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/easyui5/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/easyui5/themes/icon.css">
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/easyui5/jquery.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/easyui5/jquery.easyui.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/index.js"></script>
</head>
<body class="easyui-layout">
<div data-options="region:'north',border:false" style="height:60px;background:#B3DFDA;padding:10px">
</div>
<div data-options="region:'west',split:true,title:'West'" style="width:150px;padding:10px;">
后台管理菜单
<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>
</html>
又因为这些数据是死的，所以我们要查询数据库里面的：
我们先看实体类：
package com.wt.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 List<TreeNode> children = new ArrayList<>();
private Map<String , Object> attributes = new HashMap<>();
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 List<TreeNode> getChildren() {
return children;
}
public void setChildren(List<TreeNode> children) {
this.children = children;
}
public Map<String, Object> getAttributes() {
return attributes;
}
public void setAttributes(Map<String, Object> attributes) {
this.attributes = attributes;
}
}
其次咱们开始写dao方法：
package com.wt.dao;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.wt.entity.TreeNode;
import com.wt.util.JsonBaseDao;
import com.wt.util.JsonUtils;
import com.wt.util.PageBean;
import com.wt.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;
}
/**
* 查询menu表的子节点数据
* @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");
if(StringUtils.isNotBlank(id)) {
sql = sql+ " and parentid="+id;
}
else {
sql = sql+ " and parentid= -1" ;
}
return super.executeQuery(sql, pageBean);
}
/**
* 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
*/
private 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);
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);
}
private 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);
}
}
}
然后去子控制器调用方法
package com.wt.web;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.wt.dao.MenuDao;
import com.wt.util.ResponseUtil;
import com.zking.framework.ActionSupport;
public class MenuAction extends ActionSupport{
private MenuDao menuDao = new MenuDao();
public String treeMenu(HttpServletRequest req,HttpServletResponse resp) throws Exception {
List<Map<String, Object>> listMenu = this.menuDao.listMenu(req.getParameterMap(), null);
ObjectMapper om = new ObjectMapper();
//将list集合转换成json串
String jsonStr = om.writeValueAsString(listMenu);
ResponseUtil.write(resp, jsonStr);
return null;
}
}
结果：
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