layui--02

简介: layui--02

1.什么是layui:

Layui是一个简单、易用且功能强大的前端UI框架,专注于提升开发者的开发效率。它基于HTML、CSS和JavaScript,并提供了一套丰富的UI组件、动态模块加载、模板引擎、弹窗组件、表单验证等等功能,可以帮助开发者快速构建漂亮、响应式的Web界面。

Layui的设计理念是"经典易用,显而易见",具有简洁、直观的API,可以很容易地理解和使用。它提供了灵活的扩展机制和丰富的文档,能够满足各种项目的需求,并且可以与主流的JavaScript库和框架(如jQuery、AngularJS等)无缝集成。

通过使用Layui,开发者可以快速搭建出结构清晰、交互友好、美观大方的Web界面,提高开发效率,节省开发时间。无论是个人项目还是企业级应用,Layui都是一个不错的选择。

2.原始数据获取:

1.需要什么样的数据格式:

oneitems=[
       {name:'group1',id=1,haschild:true,child=flase}
           {name:'menu1',id=1},
           {name:'menu2',id=2},
           {name:'menu3',id=3},
       ]},
       {name:'group2',id=2},
       {name:'group3',id=3},
       {name:'group',id=4},

2.能够拿到什么样的数据:

建立实体类:

package com.zking.entity;
public class Permission {
  private long id;
  private String name;
  private String description;
  private String url;
  private long pid;
  private int ismenu;//控制当前系统的权限是菜单还是按钮
  private long displayno;//菜单排序字段
  public long getId() {
    return id;
  }
  public void setId(long id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getDescription() {
    return description;
  }
  public void setDescription(String description) {
    this.description = description;
  }
  public String getUrl() {
    return url;
  }
  public void setUrl(String url) {
    this.url = url;
  }
  public long getPid() {
    return pid;
  }
  public void setPid(long pid) {
    this.pid = pid;
  }
  public int getIsmenu() {
    return ismenu;
  }
  public void setIsmenu(int ismenu) {
    this.ismenu = ismenu;
  }
  public long getDisplayno() {
    return displayno;
  }
  public void setDisplayno(long displayno) {
    this.displayno = displayno;
  }
  public Permission(long id, String name, String description, String url, long pid, int ismenu, long displayno) {
    super();
    this.id = id;
    this.name = name;
    this.description = description;
    this.url = url;
    this.pid = pid;
    this.ismenu = ismenu;
    this.displayno = displayno;
  }
  public Permission() {
    super();
  }
  @Override
  public String toString() {
    return "Permission [id=" + id + ", name=" + name + ", description=" + description + ", url=" + url + ", pid="
        + pid + ", ismenu=" + ismenu + ", displayno=" + displayno + "]";
  }
}

建立dao方法:

package com.zking.dao;
import java.util.List;
import com.zking.entity.Permission;
import com.zking.util.BaseDao;
import com.zking.util.PageBean;
public class PermissionDao extends BaseDao<Permission> {
      public List<Permission> list(Permission permission, PageBean pageBean) throws Exception {
      String sql="select * from t_oa_permission";
      return super.executeQuery(sql, Permission.class, pageBean);
    }
}

使用junit4来看获取什么:

package com.zking.dao;
import static org.junit.Assert.*;
import java.util.List;
import org.junit.Test;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zking.entity.Permission;
public class PermissionDaoTest {
     private PermissionDao permissionDao =new PermissionDao(); 
  @Test
  public void testList() throws Exception {
    List<Permission> list = permissionDao.list(null, null);
    ObjectMapper om=new ObjectMapper();
    System.out.println(om.writeValueAsString(list));
  }
}

最后输出结果:

[{
  "id": 10,
  "name": "会议管理",
  "description": null,
  "url": null,
  "pid": -1,
  "ismenu": 1,
  "displayno": 1
}, {
  "id": 11,
  "name": "投票管理",
  "description": null,
  "url": null,
  "pid": -1,
  "ismenu": 1,
  "displayno": 9
}, {
  "id": 12,
  "name": "会议室管理",
  "description": null,
  "url": "jsp/meeting/meetingRoom.jsp",
  "pid": -1,
  "ismenu": 1,
  "displayno": 14
}, {
  "id": 13,
  "name": "系统管理",
  "description": null,
  "url": null,
  "pid": -1,
  "ismenu": 1,
  "displayno": 15
}, {
  "id": 1001,
  "name": "会议发布",
  "description": "发起会议",
  "url": "jsp/meeting/addMeeting.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 2
}, {
  "id": 1002,
  "name": "会议通知",
  "description": "别人发起的会议,需要你确认是否参加",
  "url": "jsp/meeting/meetingNotify.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 3
}, {
  "id": 1003,
  "name": "我的会议",
  "description": "我发起的,未审核->已审核",
  "url": "jsp/meeting/myMeeting.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 4
}, {
  "id": 1004,
  "name": "我的审批",
  "description": "我审批的会议",
  "url": "jsp/meeting/myAudit.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 5
}, {
  "id": 1005,
  "name": "待开会议",
  "description": "我参与的,但是还未开始的",
  "url": "jsp/meeting/meetingWaiting.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 6
}, {
  "id": 1006,
  "name": "历史会议",
  "description": "已经参与的",
  "url": "jsp/meeting/meetingHistory.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 7
}, {
  "id": 1007,
  "name": "所有会议",
  "description": "对所有会议进行汇总",
  "url": "jsp/meeting/meetingAll.jsp",
  "pid": 10,
  "ismenu": 1,
  "displayno": 8
}, {
  "id": 1101,
  "name": "投票标题",
  "description": "需要关联到会议标题(议题)",
  "url": null,
  "pid": 11,
  "ismenu": 1,
  "displayno": 10
}, {
  "id": 1102,
  "name": "投票选项",
  "description": "需要关联到投票标题",
  "url": null,
  "pid": 11,
  "ismenu": 1,
  "displayno": 11
}, {
  "id": 1103,
  "name": "投票结果",
  "description": "需要保留数据,可以看到谁投了什么票",
  "url": null,
  "pid": 11,
  "ismenu": 1,
  "displayno": 12
}, {
  "id": 1104,
  "name": "投票报表",
  "description": "哪标题的哪个选项共投了多少票",
  "url": null,
  "pid": 11,
  "ismenu": 1,
  "displayno": 13
}, {
  "id": 1301,
  "name": "用户管理",
  "description": null,
  "url": "jsp/system/userManage.jsp",
  "pid": 13,
  "ismenu": 1,
  "displayno": 16
}, {
  "id": 1302,
  "name": "角色管理",
  "description": null,
  "url": null,
  "pid": 13,
  "ismenu": 1,
  "displayno": 17
}, {
  "id": 1303,
  "name": "权限管理",
  "description": null,
  "url": null,
  "pid": 13,
  "ismenu": 1,
  "displayno": 18
}, {
  "id": 1304,
  "name": "数据字典",
  "description": null,
  "url": null,
  "pid": 13,
  "ismenu": 1,
  "displayno": 19
}]

3.layui父子数据的转换:

树型菜单展示 泛型  帮助形成父子关系的一个类:建立TreeVo

package com.zking.util;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
//树型菜单展示 泛型  帮助形成父子关系的一个类
public class TreeVo<T> {
  /**
   * 节点ID
   */
  private String id;
  /**
   * 显示节点文本
   */
  private String text;
  /**
   * 节点状态,open closed
   */
  private Map<String, Object> state;
  /**
   * 节点是否被选中 true false
   */
  private boolean checked = false;
  /**
   * 节点属性
   */
  private Map<String, Object> attributes;
  /**
   * 节点的子节点
   */
  private List<TreeVo<T>> children = new ArrayList<TreeVo<T>>();
  /**
   * 父ID
   */
  private String parentId;
  /**
   * 是否有父节点
   */
  private boolean hasParent = false;
  /**
   * 是否有子节点
   */
  private boolean hasChildren = false;
  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> getState() {
    return state;
  }
  public void setState(Map<String, Object> state) {
    this.state = state;
  }
  public boolean isChecked() {
    return checked;
  }
  public void setChecked(boolean checked) {
    this.checked = checked;
  }
  public Map<String, Object> getAttributes() {
    return attributes;
  }
  public void setAttributes(Map<String, Object> attributes) {
    this.attributes = attributes;
  }
  public List<TreeVo<T>> getChildren() {
    return children;
  }
  public void setChildren(List<TreeVo<T>> children) {
    this.children = children;
  }
  public boolean isHasParent() {
    return hasParent;
  }
  public void setHasParent(boolean isParent) {
    this.hasParent = isParent;
  }
  public boolean isHasChildren() {
    return hasChildren;
  }
  public void setChildren(boolean isChildren) {
    this.hasChildren = isChildren;
  }
  public String getParentId() {
    return parentId;
  }
  public void setParentId(String parentId) {
    this.parentId = parentId;
  }
  public TreeVo(String id, String text, Map<String, Object> state, boolean checked, Map<String, Object> attributes,
                  List<TreeVo<T>> children, boolean isParent, boolean isChildren, String parentID) {
    super();
    this.id = id;
    this.text = text;
    this.state = state;
    this.checked = checked;
    this.attributes = attributes;
    this.children = children;
    this.hasParent = isParent;
    this.hasChildren = isChildren;
    this.parentId = parentID;
  }
  public TreeVo() {
    super();
  }
}

将数据库查询出来的平级数据,转换成有父子关系的数据:

package com.zking.dao;
import java.util.ArrayList;
import java.util.List;
import com.zking.entity.Permission;
import com.zking.util.BaseDao;
import com.zking.util.BuildTree;
import com.zking.util.PageBean;
import com.zking.util.TreeVo;
public class PermissionDao extends BaseDao<Permission> {
      public List<Permission> list(Permission permission, PageBean pageBean) throws Exception {
      String sql="select * from t_oa_permission";
      return super.executeQuery(sql, Permission.class, pageBean);
    }
      //将数据库查询出来的平级数据,转换成有父子关系的数据
      public List<TreeVo<Permission>> menus(Permission permission, PageBean pageBean) throws Exception{
        List<TreeVo<Permission>> l=new ArrayList<TreeVo<Permission>>();
        List<Permission> list = this.list(permission, pageBean);
        for (Permission p : list) {
      TreeVo<Permission> vo = new TreeVo<>();
      vo.setId(p.getId()+"");
      vo.setText(p.getName());
      vo.setParentId(p.getPid()+"");
      l.add(vo);
    }
        return BuildTree.buildList(l, "-1");
      }
}

使用junit4来获取父子关系:

package com.zking.dao;
import static org.junit.Assert.*;
import java.util.List;
import org.junit.Test;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zking.entity.Permission;
import com.zking.util.TreeVo;
public class PermissionDaoTest {
     private PermissionDao permissionDao =new PermissionDao(); 
  @Test
  public void testList() throws Exception {
    List<Permission> list = permissionDao.list(null, null);
    ObjectMapper om=new ObjectMapper();
    System.out.println(om.writeValueAsString(list));
  }
  @Test
  public void menus() throws Exception {
     List<TreeVo<Permission>> menus = permissionDao.menus(null, null);
    ObjectMapper om=new ObjectMapper();
    System.out.println(om.writeValueAsString(menus));
}
}

输出结果:

[{
  "id": "10",
  "text": "会议管理",
  "state": null,
  "checked": false,
  "attributes": null,
  "children": [{
    "id": "1001",
    "text": "会议发布",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1002",
    "text": "会议通知",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1003",
    "text": "我的会议",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1004",
    "text": "我的审批",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1005",
    "text": "待开会议",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1006",
    "text": "历史会议",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1007",
    "text": "所有会议",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "10",
    "hasParent": true,
    "hasChildren": false
  }],
  "parentId": "-1",
  "hasParent": false,
  "hasChildren": true
}, {
  "id": "11",
  "text": "投票管理",
  "state": null,
  "checked": false,
  "attributes": null,
  "children": [{
    "id": "1101",
    "text": "投票标题",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "11",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1102",
    "text": "投票选项",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "11",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1103",
    "text": "投票结果",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "11",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1104",
    "text": "投票报表",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "11",
    "hasParent": true,
    "hasChildren": false
  }],
  "parentId": "-1",
  "hasParent": false,
  "hasChildren": true
}, {
  "id": "12",
  "text": "会议室管理",
  "state": null,
  "checked": false,
  "attributes": null,
  "children": [],
  "parentId": "-1",
  "hasParent": false,
  "hasChildren": false
}, {
  "id": "13",
  "text": "系统管理",
  "state": null,
  "checked": false,
  "attributes": null,
  "children": [{
    "id": "1301",
    "text": "用户管理",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "13",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1302",
    "text": "角色管理",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "13",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1303",
    "text": "权限管理",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "13",
    "hasParent": true,
    "hasChildren": false
  }, {
    "id": "1304",
    "text": "数据字典",
    "state": null,
    "checked": false,
    "attributes": null,
    "children": [],
    "parentId": "13",
    "hasParent": true,
    "hasChildren": false
  }],
  "parentId": "-1",
  "hasParent": false,
  "hasChildren": true
}]

 

4.layui功能实现:

配置mvc.xml:

<?xml version="1.0" encoding="UTF-8"?>
<config>
  <action path="/blog" type="com.zking.web.BlogAction">
    <forward name="list" path="/blogList.jsp" redirect="false" />
    <forward name="toList" path="/blog.action?methodName=list"
      redirect="true" />
    <forward name="toEdit" path="/blogEdit.jsp" redirect="false" />
  </action>
    <action path="/user" type="com.zking.web.UserAction">
  </action>
  <action path="/permission" type="com.zking.web.PermissionAction">
  </action>
<!--  <action path="/meetingInfo" type="com.zking.web.MeetingInfoAction"> -->
<!--    <forward name="list" path="/meetingInfoList.jsp" redirect="false" /> -->
<!--    <forward name="toList" path="/meetingInfo.action?methodName=list" -->
<!--      redirect="true" /> -->
<!--    <forward name="toEdit" path="/meetingInfoEdit.jsp" redirect="false" /> -->
<!--  </action> -->
<!--  <action path="/solrBlog" type="com.test.web.SolrBlogAction"> -->
<!--    <forward name="list" path="/solrBlogList.jsp" redirect="false" /> -->
<!--    <forward name="toList" path="/solrBlog.action?methodName=list" -->
<!--      redirect="true" /> -->
<!--    <forward name="toEdit" path="/solrBlogEdit.jsp" redirect="false" /> -->
<!--  </action> -->
  <action path="/studentBlog" type="com.test.web.StudentBlogAction">
    <forward name="list" path="/studentBlogList.jsp" redirect="false" />
    <forward name="toList" path="/studentBlog.action?methodName=list" redirect="true" />
    <forward name="toEdit" path="/studentBlogEdit.jsp" redirect="false" />
  </action>
  <action path="/solrBlog" type="com.xiaoli.web.SolrBlogAction">
    <forward name="list" path="/solrBlogList.jsp" redirect="false" />
    <forward name="toList" path="/solrBlog.action?methodName=list" redirect="true" />
    <forward name="toEdit" path="/solrBlogEdit.jsp" redirect="false" />
  </action>
</config>

前台:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
      <%@include file="common/header.jsp" %>
<!DOCTYPE html >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>后台主页</title>
</head>
<body>
<div class="layui-layout layui-layout-admin">
  <div class="layui-header">
    <div class="layui-logo layui-hide-xs layui-bg-black">layout demo</div>
    <!-- 头部区域(可配合layui 已有的水平导航) -->
    <ul class="layui-nav layui-layout-left">
      <!-- 移动端显示 -->
      <li class="layui-nav-item layui-show-xs-inline-block layui-hide-sm" lay-header-event="menuLeft">
        <i class="layui-icon layui-icon-spread-left"></i>
      </li>
      <!-- Top导航栏 -->
      <li class="layui-nav-item layui-hide-xs"><a href="">nav 1</a></li>
      <li class="layui-nav-item layui-hide-xs"><a href="">nav 2</a></li>
      <li class="layui-nav-item layui-hide-xs"><a href="">nav 3</a></li>
      <li class="layui-nav-item">
        <a href="javascript:;">nav groups</a>
        <dl class="layui-nav-child">
          <dd><a href="">menu 11</a></dd>
          <dd><a href="">menu 22</a></dd>
          <dd><a href="">menu 33</a></dd>
        </dl>
      </li>
    </ul>
    <!-- 个人头像及账号操作 -->
    <ul class="layui-nav layui-layout-right">
      <li class="layui-nav-item layui-hide layui-show-md-inline-block">
        <a href="javascript:;">
          <img src="//tva1.sinaimg.cn/crop.0.0.118.118.180/5db11ff4gw1e77d3nqrv8j203b03cweg.jpg" class="layui-nav-img">
          tester
        </a>
        <dl class="layui-nav-child">
          <dd><a href="">Your Profile</a></dd>
          <dd><a href="">Settings</a></dd>
          <dd><a href="login.jsp">Sign out</a></dd>
        </dl>
      </li>
      <li class="layui-nav-item" lay-header-event="menuRight" lay-unselect>
        <a href="javascript:;">
          <i class="layui-icon layui-icon-more-vertical"></i>
        </a>
      </li>
    </ul>
  </div>
  <div class="layui-side layui-bg-black">
    <div class="layui-side-scroll">
      <!-- 左侧导航区域(可配合layui已有的垂直导航) -->
      <ul id="menu" class="layui-nav layui-nav-tree" lay-filter="menu">
         <li class="layui-nav-item layui-nav-itemed">
          <a class="" href="javascript:;">menu group 1</a>
          <dl class="layui-nav-child">
            <dd><a href="javascript:;">menu 1</a></dd>
            <dd><a href="javascript:;">menu 2</a></dd>
            <dd><a href="javascript:;">menu 3</a></dd>
            <dd><a href="">the links</a></dd>
          </dl>
        </li>
        <li class="layui-nav-item">
          <a href="javascript:;">menu group 2</a>
          <dl class="layui-nav-child">
            <dd><a href="javascript:;">list 1</a></dd>
            <dd><a href="javascript:;">list 2</a></dd>
            <dd><a href="">超链接</a></dd>
          </dl>
        </li>
        <li class="layui-nav-item"><a href="javascript:;">click menu item</a></li>
        <li class="layui-nav-item"><a href="">the links</a></li> 
      </ul>
    </div>
  </div>
  <div class="layui-body">
    <!-- 内容主体区域 -->
    <div style="padding: 15px;">内容主体区域。记得修改 layui.css 和 js 的路径</div>
  </div>
  <div class="layui-footer">
    <!-- 底部固定区域 -->
            底部固定区域
  </div>
</div>
<script>
//JS 
layui.use(['element', 'layer', 'util'], function(){
  var element = layui.element
  ,layer = layui.layer
  ,util = layui.util
  ,$ = layui.$;
  $.ajax({
   url:"${pageContext.request.contextPath }/permission.action?methodName=menus",
       dataType:'json',
       success:function(data){
         console.log(data);
         var htmlStr='';
         $.each(data,function(i,n){
           htmlStr +='  <li class="layui-nav-item layui-nav-itemed">';
           htmlStr +='<a class="" href="javascript:;">'+n.text+'</a>';
           if(n.hasChildren){
            var children= n.children;
             htmlStr +=' <dl class="layui-nav-child">';
             $.each(children,function(idx,node){
                 htmlStr +='  <dd><a href="javascript:;">'+node.text+'</a></dd>';
             })
             htmlStr +='  </dl>';
           }
           htmlStr +=' </li>';
         })
         $("#menu").html(htmlStr);
         element.render('menu');
       }
  });
});
</script>
</body>
</html>

最后一定要:

加 element.render('menu')要不然会报错

输出结果:

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