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easyUI--入门实例

ui框架

1、需要导入的所有jar包，以及外部的类或文件

1.1导入jar包

1.2导入WebContent外部资源

1.3导入所有需要的辅助类--Util包

2.实例代码

2.1创建TreeNode实体类

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

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

}

2.2dao层--MenuDao

 1 package com.yuan.dao;
 2 
 3 import java.sql.SQLException;
 4 import java.util.ArrayList;
 5 import java.util.HashMap;
 6 import java.util.List;
 7 import java.util.Map;
 8 
 9 import com.yuan.entity.TreeNode;
10 import com.yuan.util.JsonBaseDao;
11 import com.yuan.util.JsonUtils;
12 import com.yuan.util.PageBean;
13 import com.yuan.util.StringUtils;
14 
15 public class MenuDao extends JsonBaseDao {
16     
17     
18     /**
19      * 给前台tree_data1_json的字符串
20      * @param paMap 从前台jsp传递过来的参数集合
21      * @param pageBean
22      * @return
23      * @throws InstantiationException
24      * @throws IllegalAccessException
25      * @throws SQLException
26      */
27     public List<TreeNode> listTreeNode(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
28        List<Map<String, Object>> listMap = this.listMap(paMap, pageBean);
29        List<TreeNode> listTreeNode=new ArrayList<TreeNode>();
30        this.listMapToListTreeNode(listMap, listTreeNode);
31        return listTreeNode;
32     }
33     
34     public List<Map<String, Object>> listMap(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
35         String sql="SELECT * FROM t_easyui_menu WHERE TRUE";
36         String menuId=JsonUtils.getParamVal(paMap, "Menuid");
37         if(StringUtils.isNotBlank(menuId)) {
38             sql+=" AND parentid="+menuId;
39         }
40         else {
41             sql+=" AND parentid=-1";
42         }
43         
44         //这里面存放数据库中的菜单信息
45       List<Map<String, Object>> listMap = super.executeQuery(sql, pageBean);
46          return listMap;
47      }
48     
49     
50     /**
51      * {'Menuid':001,'Menuame':'学生管理'}
52      * {id:..,text:...}
53      * @param map
54      * @param treeNode
55      * @throws InstantiationException
56      * @throws IllegalAccessException
57      * @throws SQLException
58      */
59     private void MapToTreeNode(Map<String, Object> map,TreeNode treeNode) throws InstantiationException, IllegalAccessException, SQLException {
60         treeNode.setId(map.get("Menuid")+"");
61         treeNode.setText(map.get("Menuname")+"");
62         treeNode.setAttributes(map);
63          
64 //        将子节点添加到父节点当中，建立数据之间的父子关系
65 //        treeNode.setChildren(children);
66         Map<String, String[]> childrenMap=new HashMap<>();
67         childrenMap.put("Menuid", new String[]{treeNode.getId()});
68         List<Map<String, Object>> listMap = this.listMap(childrenMap, null);
69         List<TreeNode>listTreeNode=new ArrayList<>();
70         this.listMapToListTreeNode(listMap, listTreeNode);
71         treeNode.setChildren(listTreeNode);
72     }
73     
74     
75     /**
76      * [{'Menuid':001,'Menuame':'学生管理'}，{'Menuid':002,'Menuame':'后勤管理'}]
77      * @param listMap
78      *       tree_data1_json
79      * @param listTreeNode
80      * @throws SQLException 
81      * @throws IllegalAccessException 
82      * @throws InstantiationException 
83      */
84     private void listMapToListTreeNode (List<Map<String, Object>> listMap,List<TreeNode> listTreeNode) throws InstantiationException, IllegalAccessException, SQLException{
85         TreeNode treeNode=null;
86         for (Map<String, Object> map : listMap) {
87             treeNode=new TreeNode();
88             MapToTreeNode(map, treeNode);
89             listTreeNode.add(treeNode);
90         }
91   
92     }
93     
94     
95     
96     
97     
98 }

2.3web层--MenuAction

 1 package com.yuan.web;
 2 
 3 import java.util.List;
 4 
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpServletResponse;
 7 
 8 import com.fasterxml.jackson.databind.ObjectMapper;
 9 import com.yuan.dao.MenuDao;
10 import com.yuan.entity.TreeNode;
11 import com.yuan.util.ResponseUtil;
12 import com.***.framework.ActionSupport;
13                      
14 public class MenuAction extends ActionSupport{
15     
16     private MenuDao menuDao=new MenuDao();
17     
18     public String menuTree(HttpServletRequest request,HttpServletResponse response) throws Exception {
19         ObjectMapper om=new ObjectMapper();
20         //获取到 easyui所识别的json格式
21         List<TreeNode> listTreeNode = this.menuDao.listTreeNode(request.getParameterMap(), null);
22         ResponseUtil.write(response, om.writeValueAsString(listTreeNode));
23         
24          return null;
25     }              
26     
27     
28     
29 }

2.4 jsp页面代码

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>后台主界面</title>
 8 <!-- Ctrl+Shift+r -->
 9 <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/static/js/public/easyui5/themes/default/easyui.css">  <!-- 引入easyui样式文件-->  
10 <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/static/js/public/easyui5/themes/icon.css">  <!-- 引入easyui图标样式文件-->  
11 <script type="text/javascript" src="${pageContext.request.contextPath}/static/js/public/easyui5/jquery.min.js"></script>   <!-- 引入jQuery -->
12 <script type="text/javascript" src="${pageContext.request.contextPath}/static/js/public/easyui5/jquery.easyui.min.js"></script>  <!-- 引入easyui-->
13 <script type="text/javascript" src="${pageContext.request.contextPath}/static/js/index.js"></script>   
14 
15 </head>
16 <body class="easyui-layout">
17     <div data-options="region:'north',border:false" style="height:60px;background:#B3DFDA;padding:10px">north region</div>
18     <div data-options="region:'west',split:true,title:'West'" style="150px;padding:10px;">
19     <ul id="tt"></ul>  
20     </div>
21     <div data-options="region:'east',split:true,collapsed:true,title:'East'" style="100px;padding:10px;">east region</div>
22     <div data-options="region:'south',border:false" style="height:50px;background:#A9FACD;padding:10px;">south region</div>
23     <div data-options="region:'center',title:'Center'">
24     <div id="menuTab" class="easyui-tabs" style="">   
25     <div title="首页" style="padding:20px;display:none;">   
26        欢迎界面  
27     </div>   
28 </div>  
29     </div>
30 </body>
31 
32 </html>

2.5 xml配置

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>easyui01</display-name>
  <filter>
      <filter-name>encodingFiter</filter-name>
      <filter-class>com.yuan.util.EncodingFiter</filter-class>
  </filter>
  <filter-mapping>
      <filter-name>encodingFiter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <servlet>
      <servlet-name>actionServlet</servlet-name>
      <servlet-class>com.***.framework.ActionServlet</servlet-class>
  </servlet>
  <servlet-mapping>
      <servlet-name>actionServlet</servlet-name>
      <url-pattern>*.action</url-pattern>
  </servlet-mapping>
</web-app>

mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<config>

    <action path="/menuAction" type="com.yuan.web.MenuAction">
    </action>
    
</config>

2.6数据库信息（展示部分）

2.7显示结果

谢谢观看^-^ ！！！

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原文地址：https://www.cnblogs.com/ly-0919/p/11107884.html