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[jQuery] easyui高级控件(上)

开发技术 开发技术 发布于:2021-06-28 14:55 | 阅读数:533 | 评论:0

  
  easyui高级控件


  • 权限树


    • 1.一星权限设计(用户权限多对一)
    • 2.二星权限设计(用户权限多对多)

  • 权限功能
  • 二星权限代码演示


  权限树
1.一星权限设计(用户权限多对一)


  • 执行数据库脚本
  • 建立实体类
  • 创建dao
  • Web层创建
  • 更改展示的树形菜单
  看图分析,如下:
DSC0000.png
user
zhangsan
lisi
UserMenu
001 zhangsan
001lisi
......
menu
001zhangsan
002zhangsan
003
004
  上面是user与menu是一对多的关系
弊端:一个菜单不能对应多个用户
  思考:我们想一个用户对应多个菜单
然后一个菜单可以对应多个用户
其实这就是user与menu的多对多的关系
  思路

  • 菜单不同的原因在于,利用不同menuid进行查询,原本默认查询的是所有菜单,是通过-1去查的;
  • menuid由来:是登录用户id查询中间表数据所得来的

2.二星权限设计(用户权限多对多)


  • 执行数据库脚本
  • 修改原有的实体类
  • 建立实体类
  • 创建dao
  • 修改原有的dao
  • 新增web的方法
  • 新增登入界面,跳入前端树形菜单
  看图分析,如下:
DSC0001.png
权限功能

  • 用户的增删改查(datagrid组件)
  • 角色的增删改查(datagrid组件) 权限的集合
  • 权限菜单的增删改查(treegrid组件)
  • 角色授权(tree控件/ztree) 角色所对应权限,需要默认给指定的权限打勾
  • 给用户赋予角色(用到多层组嵌套)
二星权限代码演示  根据easyui入门代码基础下进行编程。
  dao层后台编写
  MenuDao
package com.myy.dao;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.myy.entity.TreeNode;
import com.myy.util.JsonBaseDao;
import com.myy.util.JsonUtils;
import com.myy.util.PageBean;
import com.myy.util.StringUtils;
/**
 * 1.查询数据库所有数据用于easyui的tree树形展示(但是直接得来的数据格式easyui不识别)
 * 2.递归查询节点集合,形成子父节点关系,具备层次结构
 * 3.转格式
 * @author myy
 *
 */
public class MenuDao extends JsonBaseDao{
 /**
  * List<TreeNode>加上ObjectMapper可以转换成easyui的tree控件识别的json串
 * @param map
 * @param pageBean
 * @return
 * @throws SQLException 
 * @throws IllegalAccessException 
 * @throws InstantiationException 
 */
public List<TreeNode> listTreeNode(Map<String, String[]> map,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
List<Map<String, Object>> listMenu = this.listMenuAuth(map, pageBean);
  List<TreeNode> listTreeNode = new ArrayList<TreeNode>();
  this.listMapToListTreeNode(listMenu, listTreeNode);
   return listTreeNode;
   }
/**
 *  按照不同用户登录能够访问不同的菜单
 * @param map
 * @param pageBean
 * @return
 * @throws InstantiationException
 * @throws IllegalAccessException
 * @throws SQLException
 */
public List<Map<String, Object>> listMenuAuth(Map<String, String[]> map,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql = "select * from t_easyui_menu where true";
String id = JsonUtils.getParamVal(map, "Menuid");
if(StringUtils.isNotBlank(id)) {
//当前节点的ID当作字节父ID进行查询
sql += " and menuid in ("+id+") ";
}else {
sql += " and menuid=000";
}
return super.executeQuery(sql, pageBean);
   }
/**
 * List<Map<String, Object>>
 * ->{Menuid:001.Menuname:学生管理,children:[]}
 * 接下来需要递归查询子节点的集合存入当前节点
 *  
 * @param map
 * @param pageBean
 * @return
 * @throws InstantiationException
 * @throws IllegalAccessException
 * @throws SQLException
 */
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, "Menuid");
if(StringUtils.isNotBlank(id)) {
//当前节点的ID当作字节父ID进行查询
sql += " and parentid="+id;
}else {
sql += " and parentid=-1";
}
return super.executeQuery(sql, pageBean);
   }

/**
 * 需要将后台数据库查出来的数据格式转换成前台easyui所识别的数据
 * 
 * @param map
 * @param treeNode
 * @throws SQLException 
 * @throws IllegalAccessException 
 * @throws InstantiationException 
 */
public void mapToTreeNode(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[]> childMap = new HashMap<String, String[]>();
childMap.put("Menuid", new String[] {treeNode.getId()});
//查询出当前节点所拥有的子节点的集合
List<Map<String, Object>> listMenu = this.listMenu(childMap, null);
  List<TreeNode> listTreeNode = new ArrayList<TreeNode>();
  this.listMapToListTreeNode(listMenu, listTreeNode);
  treeNode.setChildren(listTreeNode);
}
public void listMapToListTreeNode(List<Map<String, Object>> list,List<TreeNode> listTreeNode) throws InstantiationException, IllegalAccessException, SQLException{
   TreeNode treeNode = null;
for (Map<String, Object> map: list) {
     treeNode = new TreeNode();
     this.mapToTreeNode(map, treeNode);
     listTreeNode.add(treeNode);
     
}
}
   
}
  listMenuAuth方法记得在listTreeNode调用
  index.js
$(function(){
$('#tt').tree({  
  url:'menuAction.action?methodName=menuTree&&Menuid=001,002',
  onClick: function(node){
//  alert(node.attributes.menuURL);//在用户点击的时候显示
  var content = '<iframe scrolling="no" frameborder="0" src="'+node.attributes.menuURL+'" width="99%" height="99%"></iframe>';
  if($("#menuTab").tabs('exists',node.text)){
  $("#menuTab").tab('select',node.text)
  }else{
  $('#menuTab').tabs('add',{  
    title:node.text,  
    content:content,  
    closable:true 
  }); 
  }
  }
}); 
})
  写的死数据是001,002菜单。怎么写活数据?
  运行结果
DSC0002.png
简单的用户登录界面 login.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>用户登录界面</title>
</head>
<body>
<form
action="${pageContext.request.contextPath }/userAction.action?methodName=login"
method="post">
账号:<input type="text" name="uid"><br> 密码:<input
type="text" name="upwd"><br> <input type="submit"
value="登录">
</form>
</body>
</html>
  UserDao
package com.myy.dao;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import com.myy.util.JsonBaseDao;
import com.myy.util.JsonUtils;
import com.myy.util.PageBean;
import com.myy.util.StringUtils;
public class UserDao extends JsonBaseDao {
  /**
   * 用于查询用户分页列表所用
   * 用于用户登录所用
 * @param map
 * @param pageBean
 * @return
 * @throws SQLException 
 * @throws IllegalAccessException 
 * @throws InstantiationException 
 */
public List<Map<String, Object>> list(Map<String, String[]> map,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql="select * from t_easyui_user_version2 where true ";
String uid = JsonUtils.getParamVal(map, "uid");
String upwd = JsonUtils.getParamVal(map, "upwd");
if(StringUtils.isNotBlank(uid)) {
sql += " and uid = "+uid;
}
if(StringUtils.isNotBlank(upwd)) {
sql += " and upwd = "+upwd;
}
  return super.executeQuery(sql, pageBean);
  }

/**
 * 通过用户登录的唯一账号,在用户父权限中间表中获取菜单ID的集合
 * @param map
 * @param pageBean
 * @return
 * @throws SQLException 
 * @throws IllegalAccessException 
 * @throws InstantiationException 
 */
public List<Map<String, Object>> getMenuseByUser(Map<String, String[]> map,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql="select * from t_easyui_usermenu where true ";
String uid = JsonUtils.getParamVal(map, "uid");
if(StringUtils.isNotBlank(uid)) {
sql += " and uid = "+uid;
}
  return super.executeQuery(sql, pageBean);
  }
}
  UserAction
package com.myy.web;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.myy.dao.UserDao;
import com.myy.framework.ActionSupport;
public class UserAction extends ActionSupport {
  private UserDao userDao = new UserDao();
  
  public String login(HttpServletRequest req,HttpServletResponse resp) {
  String code="index";
//  登录
  try {
List<Map<String, Object>> list = this.userDao.list(req.getParameterMap(), null);
if(list.size()==1 && list != null) {
//用户存在
List<Map<String,Object>> menuList = this.userDao.getMenuseByUser(req.getParameterMap(), null);
StringBuilder sb = new StringBuilder();
for (Map<String, Object> map : menuList) {
sb.append(","+map.get("menuId"));
}
//,001,002 第一个下标开始截取
req.setAttribute("menuIds", sb.substring(1));
}else {
//用户不存在
req.setAttribute("msg", "用户不存在");
code = "login";
}
  
  } catch (InstantiationException | IllegalAccessException | SQLException e) {
e.printStackTrace();
code = "login";
}
return code;
  
  }
}
  配置mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<config>
<action path="/menuAction" type="com.myy.web.MenuAction">
</action>
<action path="/userAction" type="com.myy.web.UserAction">
<forward name="index" path="/index.jsp" redirect="false" />
  <forward name="login" path="/login.jsp" redirect="false" />
</action>
</config>
  index主页
<%@ 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">
<link rel="stylesheet" type="text/css"
href="${pageContext.request.contextPath }/static/easyui5/themes/default/easyui.css">
<link rel="stylesheet" type="text/css"
href="${pageContext.request.contextPath }/static/easyui5/themes/icon.css">
<script type="text/javascript"
src="${pageContext.request.contextPath }/static/easyui5/jquery.min.js"></script>
<script type="text/javascript"
src="${pageContext.request.contextPath }/static/easyui5/jquery.easyui.min.js"></script>
<script type="text/javascript"
src="${pageContext.request.contextPath }/static/js/index.js"></script>
<title>后台管理主界面</title>
</head>
<!--menuAction.action?methodName=menuTree  -->
<body class="easyui-layout">
  <input type="hidden" id="menuIds" value="${menuIds}">
<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;">
左侧菜单栏加载
<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="menuTab" class="easyui-tabs" style="height:800px;">   
  <div title="Tab1" style="padding:20px;display:none;">   
    默认首页展示内容  
  </div>   
   
</div>  
</div>
</body>
</html>
  index.js得到主页面的子菜单
$(function(){
$('#tt').tree({  
  url:'menuAction.action?methodName=menuTree&&Menuid='+$("#menuIds").val(),
  onClick: function(node){
//  alert(node.attributes.menuURL);//在用户点击的时候显示
  var content = '<iframe scrolling="no" frameborder="0" src="'+node.attributes.menuURL+'" width="99%" height="99%"></iframe>';
  if($("#menuTab").tabs('exists',node.text)){
  $("#menuTab").tab('select',node.text)
  }else{
  $('#menuTab').tabs('add',{  
    title:node.text,  
    content:content,  
    closable:true 
  }); 
  }
  }
}); 
})
  运行结果:
DSC0003.png
DSC0004.png

  
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