layui的CRUD案例
Posted xiatian3452
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用layui来实现一个简单的二级权限和增删改查案列
利用layui提供的组件（table , layer , form，tree）来进行开发
写一个简单的登录界面 根据用户的ID来 获取用户所对应的权限
<%@ 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> </head> <body> <form action="$pageContext.request.contextPath /userAction.action?methodName=login" method="post"> <input type="text" name="uid" ><br> <input type="text" name="upwd" ><br> <input type="submit" ><br> </form> </body> </html>
Userdao
package com.liuwenwu.dao; import java.sql.SQLException; import java.util.List; import java.util.Map; import com.liuwenwu.util.JsonBaseDao; import com.liuwenwu.util.JsonUtils; import com.liuwenwu.util.PageBean; import com.liuwenwu.util.StringUtils; public class UserDao extends JsonBaseDao /** * 登录 查询用户表 * @return * @throws SQLException * @throws IllegalAccessException * @throws InstantiationException */ public List<Map<String, Object>> list(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException String sql="select * from t_easyui_user_version2 where true"; String uid=JsonUtils.getParamVal(paMap, "uid"); String upwd=JsonUtils.getParamVal(paMap, "upwd"); if(StringUtils.isNotBlank(uid)) sql=sql+" and uid="+uid; if(StringUtils.isNotBlank(upwd)) sql=sql+" and upwd="+upwd; return super.executeQuery(sql, pageBean); /** * 通过中间表查询登录用户所对应的权限 * @param paMap * @param pageBean * @return * @throws InstantiationException * @throws IllegalAccessException * @throws SQLException */ public List<Map<String, Object>> listMenu(String uid,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException String sql="select * from t_easyui_usermenu where true"; if(StringUtils.isNotBlank(uid)) sql=sql+" and uid="+uid; return super.executeQuery(sql, pageBean);
Mebudao 查询用户权限 并将数据转换成layui所识别的格式
package com.liuwenwu.dao; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.liuwenwu.entity.TreeNode; import com.liuwenwu.util.JsonBaseDao; import com.liuwenwu.util.JsonUtils; import com.liuwenwu.util.PageBean; import com.liuwenwu.util.StringUtils; public class MenuDao extends JsonBaseDao /** * @param map req.getParameterMap * @param pageBean 分页 * @return * @throws Exception */ public List<TreeNode> list(Map<String, String[]> map,PageBean pageBean) throws Exception List<Map<String, Object>> listMenu=this.listMenuSef(map, pageBean); List<TreeNode> treeNodeList=new ArrayList<>(); menuList2TreeNodeList(listMenu, treeNodeList); return treeNodeList; public List<Map<String, Object>> listMenuSef(Map<String, String[]> map,PageBean pageBean)throws Exception String sql=" select * from t_easyui_menu where true"; String id=JsonUtils.getParamVal(map, "menuHid"); if(StringUtils.isNotBlank(id)) sql=sql +" and menuid in("+id+")"; else sql=sql+" and menuid =-1"; return super.executeQuery(sql, pageBean); /** * 查询Menu表的数据 * @param map * @param pageBean * @return */ public List<Map<String, Object>> listMenu(Map<String, String[]> map,PageBean pageBean)throws Exception 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layui树形展示的数据格式 * 需要转换成layui所能识别的数据格式 * @param map * @param reTreeNode * @throws Exception */ private void menu2TreeNode(Map<String, Object> map, TreeNode treeNode) throws Exception treeNode.setId(map.get("Menuid").toString()); treeNode.setName(map.get("Menuname").toString()); treeNode.setAttributes(map); //转换格式 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); /** * @param mapList * @param treeNodeList * @throws Exception */ private void menuList2TreeNodeList(List<Map<String, Object>> mapList, List<TreeNode> treeNodeList)throws Exception TreeNode treeNode =null; for (Map<String, Object> map : mapList) treeNode =new TreeNode(); menu2TreeNode(map, treeNode); treeNodeList.add(treeNode);
index.jsp 树形菜单展示界面 注意layui css 和 js 文件的引用
<%@ 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/js/layui/css/layui.css"> <link rel="stylesheet" type="text/css" href="$pageContext.request.contextPath /static/js/layui/css/index.css"> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/layui.js"></script> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/layui.all.js"></script> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/jquery-3.3.1.js"></script> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/index.js"></script> <title>Insert title here</title> </head> <body > <div class="layui-layout layui-layout-admin " id="app"> <div class="layui-header"> <div class="layui-logo">后台管理界面</div> <!-- 头部区域（可配合layui已有的水平导航） --> <ul class="layui-nav layui-layout-right"> <li class="layui-nav-item"><a href="#" onclick="exit()">退出登录</a></li> </ul> </div> <!-- 左边tree页面 --> <input type="hidden" id="menuHid" value="$menuHid "> <div class="layui-side layui-bg-black"> <div class="layui-side-scroll "> <div id="demo" ></div> </div> </div> <!-- 选项卡要显示的地方 --> <div class="layui-body"> <div class="layui-tab" lay-filter="tabs" lay-allowClose="true"> <ul class="layui-tab-title"> </ul> <div class="layui-tab-content"> </div> </div> </div> <div class="layui-footer" align="center" > <!-- 底部固定区域 --> </div> </div>
UserAction
public class UserAction extends ActionSupport private UserDao userDao=new UserDao(); /** * 登录 * @param req * @param resp * @return */ public String login(HttpServletRequest req,HttpServletResponse resp) try List<Map<String, Object>> list=this.userDao.list(req.getParameterMap(), null); if(list!=null&&list.size()>0) List<Map<String, Object>> listMenu=this.userDao.listMenu(req.getParameter("uid"), null); StringBuilder sb=new StringBuilder(); for (Map<String, Object> map : listMenu) sb.append(","+map.get("menuId")); // ,001,002 req.setAttribute("menuHid", sb.substring(1)); else return"login"; catch (Exception e) // TODO Auto-generated catch block e.printStackTrace(); return "index";
MenuAction
package com.liuwenwu.web; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.fasterxml.jackson.databind.ObjectMapper; import com.liuwenwu.dao.MenuDao; import com.liuwenwu.entity.TreeNode; import com.liuwenwu.util.ResponseUtil; import com.zking.framework.ActionSupport; public class MenuAction extends ActionSupport private MenuDao menuDao =new MenuDao(); public String treeMenu(HttpServletRequest req,HttpServletResponse resp) try List<TreeNode> list=this.menuDao.list(req.getParameterMap(), null); ObjectMapper om=new ObjectMapper(); //将LIST集合转换为json串 String jsonStr=om.writeValueAsString(list); ResponseUtil.write(resp, jsonStr); catch (Exception e) // TODO Auto-generated catch block e.printStackTrace(); return null;
index.js
$(function () $.ajax( type: "post", url:‘menuAction.action?methodName=treeMenu&&menuHid=‘+$("#menuHid").val(), dataType: "json", success: function (data) console.info(data); layui.tree( elem: ‘#demo‘,// 传入元素选择器 nodes: data, click: function (node) // 点击tree菜单项的时候 var element = layui.element; var exist = $("li[lay-id=‘" + node.id + "‘]").length;//判断是不是用重复的选项卡 if (exist > 0) element.tabChange(‘tabs‘, node.id);// 切换到已有的选项卡 else if (node.attributes.menuURL != null && node.attributes.menuURL != "") // 判断是否需要新增选项卡 element.tabAdd( ‘tabs‘, title: node.name, content: ‘<iframe scrolling="yes" frameborder="0" src=" ‘ + node.attributes.menuURL + ‘ " width="100%" height="100%"></iframe>‘// 支持传入html , id: node.id ); element.tabChange(‘tabs‘, node.id); ); ); )
二级权限树形菜单写完以后 是对数据的展示和增删改查
book.jsp 展示界面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="$pageContext.request.contextPath /static/js/layui/css/layui.css"> <link rel="stylesheet" type="text/css" href="$pageContext.request.contextPath /static/js/layui/css/index.css"> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/layui.js"></script> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/layui.all.js"></script> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/jquery-3.3.1.js"></script> <title>Insert title here</title> </head> <input type="hidden" id="dz" value="$pageContext.request.contextPath" > <blockquote class="layui-elem-quote"> <!-- 搜索 --> <div class="layui-form"> <div class="layui-form-item"> <label class="layui-form-label">书籍名称</label> <div class="layui-input-inline"> <input type="text" id=‘book_name‘ name="book_name" lay-verify="required" placeholder="请输入书籍名" autocomplete="true" class="layui-input"> </div> <button class="layui-btn layui-btn-normal layui-btn-radius" data-type="reload"><i class="layui-icon"></i>查询</button> <button class="layui-btn layui-btn-normal" data-type="add">新建</button> </div> </div> </blockquote> <!-- 展示数据表格 --> <table class="layui-hide" id="test" lay-filter="test"></table> <!--行内样式按钮 --> <script type="text/html" id="lineBtns"> <a class="layui-btn layui-btn-xs" lay-event="edit"><i class="layui-icon"></i>编辑</a> <a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="del">删除</a> </script> <!--弹出层 --> <div class="site-text" style="margin: 5%; display: none" id="box1" target="test123"> <form class="layui-form layui-form-pane" onsubmit="return false" id="book"> <div class="layui-form-item"> <label class="layui-form-label"> 书本名</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="book_name2" name=book_name><br> </div> <label class="layui-form-label"> 书本拼音</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="book_name_pinyin" name=book_name_pinyin><br> </div> <label class="layui-form-label"> 书本类别ID</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="book_category_id" name=book_category_id><br> </div> <label class="layui-form-label"> 书本作者</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="book_author" name=book_author><br> </div> <label class="layui-form-label"> 书本价格</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="book_price" name=book_price><br> </div> <label class="layui-form-label"> 书本出版社</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="publishing" name=publishing><br> </div> <label class="layui-form-label"> 书本简介</label> <div class="layui-input-block"> <input type="text" class="layui-input" id="book_desc" name=book_desc><br> </div> </div> </form> </div> <script type="text/javascript" src="$pageContext.request.contextPath /static/js/layui/book.js"></script> </body> </html>
book.js
layui.use([‘table‘,‘layer‘,‘form‘],function() var data=document.getElementById("dz").value; var table =layui.table; var layer=layui.layer; var form = layui.form; table.render( elem:‘#test‘, url:data+‘/bookAction.action?methodName=query‘, method:‘post‘, cols:[[ field:‘book_id‘,title:‘书本ID‘,width:100,height:80, field:‘book_name‘,title:‘书本名称‘,width:100,height:80, field:‘book_name_pinyin‘,title:‘书本拼音‘,width:100,height:80, field:‘book_category_name‘,title:‘书本类型‘,width:100,height:80, field:‘book_author‘,title:‘书本作者‘,width:100,height:80, field:‘book_price‘,title:‘书本价格‘,width:100,height:80, field:‘book_image‘,title:‘书本图片‘,width:100,height:80, field:‘publishing‘,title:‘书本出版社‘,width:100,height:80, field:‘book_desc‘,title:‘书本简介‘,width:100,height:80, field:‘zt_name‘,title:‘书本状态‘,width:100,height:80, field:‘deploy_datetime‘,height:80, width:300, title: ‘上架时间‘,templet:"<div>layui.util.toDateString(d.deploy_datetime, ‘yyyy-MM-dd HH:mm:ss‘)</div>", field:‘sales_volume‘,title:‘书本销量‘,width:100,height:80, fixed: ‘right‘, title:‘操作‘, toolbar: ‘#lineBtns‘, width:150 ]], page:‘true‘, id: ‘testReload‘ ); //上方菜单操作栏(查询、以及 增加 按钮 ) var $ = layui.$, active = //查询 reload: function () var name = $(‘#book_name‘);//书籍名称 根据 id来取值 console.log(name.val()); // 执行重载 table.reload(‘testReload‘, page: curr: 1 // 重新从第 1 页开始 , where: key: ‘book_name‘, book_name: name.val(), ); , add: function () //添加 layer.open(//弹出框 type: 1, title: ‘添加书本‘, maxmin: true, shadeClose: true, //点击遮罩关闭层 area: [‘80%‘, ‘80%‘], content: $(‘#box1‘), btn: [‘确定‘, ‘取消‘], yes: function (index, layero) //确定执行函数 console.log(layero); //执行添加方法 $.getJSON(data+"/bookAction.action?methodName=addBook", book_name: $("#book_name2").val(), book_name_pinyin: $("#book_name_pinyin").val(), book_category_id: $("#book_category_id").val(), book_author: $("#book_author").val(), book_price: $("#book_price").val(), publishing: $("#publishing").val(), book_desc: $("#book_desc").val() , function (data) /*根据后台返回的参数来进行判断 */ if (data > 0) //弹出提示层 layer.alert(‘添加成功‘, icon: 1, title: ‘提示‘, function (i) layer.close(i); layer.close(index);//关闭弹出层 $("#book")[0].reset()//重置form ) //重载表格 table.reload(‘testReload‘, page: curr: 1// 重新从第 1 页开始 ) else //提示添加失败 layer.msg(‘添加失败‘) ) , cancel: function (index, layero) //取消 //当点击取消按钮 $("#book")[0].reset()//重置form 根据id layer.close(index) ); $(‘.layui-form .layui-btn‘).on(‘click‘, function () var type = $(this).data(‘type‘); active[type] ? active[type].call(this) : ‘‘; ); /*表格 行内操作(编辑 以及 删除 按钮操作) */ table.on(‘tool(test)‘, function(obj) var data = obj.data; //获得当前行数据 var urlex=document.getElementById("dz").value; var tr=obj.tr//活动当前行tr 的 DOM对象 console.log(data); var layEvent = obj.event; //获得 lay-event 对应的值（也可以是表头的 event 参数对应的值） if(layEvent === ‘del‘) //删除 layer.confirm(‘确定删除吗？‘,title:‘删除‘, function(index) //向服务端发送删除指令og $.getJSON(urlex+‘/bookAction.action?methodName=remove‘,book_id: data.book_id, function(ret) layer.close(index);//关闭弹窗 table.reload(‘testReload‘, //重载表格 page: curr: 1 // 重新从第 1 页开始 ) ); layer.close(index); ); else if(layEvent === ‘edit‘) //编辑 layer.open( type: 1 //Page层类型 ,skin: ‘layui-layer-molv‘ ,area: [‘380px‘, ‘270px‘] ,title: [‘编辑书本信息‘,‘font-size:18px‘] ,btn: [‘确定‘, ‘取消‘] ,shadeClose: true ,shade: 0 //遮罩透明度 ,maxmin: true //允许全屏最小化 ,content:$(‘#box1‘) //弹窗id ,success:function(layero,index) $(‘#book_name2‘).val(data.book_name); $(‘#book_name_pinyin‘).val(data.book_name_pinyin); $(‘#book_category_id‘).val(data.book_category_id); $(‘#book_author‘).val(data.book_author); $(‘#book_price‘).val(data.book_price); $(‘#publishing‘).val(data.publishing); $(‘#book_desc‘).val(data.book_desc); ,yes:function(index,layero) $.getJSON(urlex+‘/bookAction.action?methodName=edit‘, book_name: $(‘#book_name2‘).val(), book_name_pinyin: $(‘#book_name_pinyin‘).val(), book_category_id: $(‘#book_category_id‘).val(), book_author: $(‘#book_author‘).val(), book_price: $(‘#book_price‘).val(), publishing: $(‘#publishing‘).val(), book_desc: $(‘#book_desc‘).val(), book_id: data.book_id, ,function(data) //根据后台返回的参数，来进行判断 if(data>0) layer.alert(‘编辑成功‘,icon:1,title:‘提示‘,function(i) layer.close(i); layer.close(index);//关闭弹出层 $("#book")[0].reset()//重置form ) table.reload(‘testReload‘,//重载表格 page: curr:1 ) ); ); ); )
BookDao
package com.liuwenwu.dao; import java.sql.SQLException; import java.util.List; import java.util.Map; import com.liuwenwu.util.JsonBaseDao; import com.liuwenwu.util.JsonUtils; import com.liuwenwu.util.PageBean; import com.liuwenwu.util.StringUtils; public class BookDao extends JsonBaseDao /** * 查询未上架 * @param paMap * @param pageBean * @return * @throws SQLException * @throws IllegalAccessException * @throws InstantiationException */ public List<Map<String, Object>> query(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException String sql="SELECT * FROM (\\r\\n" + "SELECT a.`book_id`,a.`book_name`,a.`book_name_pinyin`,b.`book_category_name`,a.`book_author`,a.`book_price`,a.`book_image`,a.`publishing`,a.`book_desc`,c.`zt_name`,a.`deploy_datetime`,a.`sales_volume` FROM t_book a INNER JOIN t_book_category b INNER JOIN t_book_zt c ON a.book_category_id=b.book_category_id AND a.`book_state`=c.`zt_id`) a\\r\\n" + "WHERE a.zt_name=‘未上架‘"; String uname = JsonUtils.getParamVal(paMap, "book_name"); if(StringUtils.isNotBlank(uname)) sql = sql+" AND a.book_name LIKE ‘%"+uname+"%‘"; return super.executeQuery(sql, pageBean); /** * 新增书本方法 * @param paMap * @return * @throws NoSuchFieldException * @throws SecurityException * @throws IllegalArgumentException * @throws IllegalAccessException * @throws SQLException */ public int addBook(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException String sql="INSERT INTO t_book (book_name,book_name_pinyin,book_category_id,book_author,book_price,publishing,book_desc) VALUES (?,?,?,?,?,?,?)"; return super.executeUpdate(sql, new String[] "book_name","book_name_pinyin","book_category_id","book_author","book_price","publishing","book_desc", paMap); /** * 修改的方法 * @param paMap * @return * @throws NoSuchFieldException * @throws SecurityException * @throws IllegalArgumentException * @throws IllegalAccessException * @throws SQLException */ public int edit(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException String sql="update t_book set book_name=?,book_name_pinyin=?,book_category_id=?,book_author=?,book_price=?,publishing=?,book_desc=? where book_id=?"; return super.executeUpdate(sql, new String[] "book_name","book_name_pinyin","book_category_id","book_author","book_price","publishing","book_desc","book_id", paMap); /** * 删除方法 * @param paMap * @return * @throws NoSuchFieldException * @throws SecurityException * @throws IllegalArgumentException * @throws IllegalAccessException * @throws SQLException */ public int remove(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException String sql="delete from t_book where book_id=?"; return super.executeUpdate(sql, new String[] "book_id", paMap);
BookAction
package com.liuwenwu.web; import java.util.HashMap; 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.liuwenwu.dao.BookDao; import com.liuwenwu.util.PageBean; import com.liuwenwu.util.ResponseUtil; import com.zking.framework.ActionSupport; public class BookAction extends ActionSupport private BookDao bookDao=new BookDao(); /** * 查询请求 * @param req * @param resp * @return */ public String query(HttpServletRequest req,HttpServletResponse resp) try PageBean pageBean=new PageBean(); pageBean.setRequest(req); List<Map<String, Object>> list=this.bookDao.query(req.getParameterMap(), pageBean); ObjectMapper om=new ObjectMapper(); Map<String, Object> map=new HashMap<>(); map.put("code", 0); map.put("count", pageBean.getTotal()); map.put("data", list); ResponseUtil.write(resp, om.writeValueAsString(map)); catch (Exception e) // TODO: handle exception e.printStackTrace(); return null; /** * 增加 * @param req * @param resp * @return */ public String addBook(HttpServletRequest req,HttpServletResponse resp) try int n=this.bookDao.addBook(req.getParameterMap()); ResponseUtil.write(resp, n); catch (Exception e) e.printStackTrace(); return null; /** * 修改方法 * @param req * @param resp * @return */ public String edit(HttpServletRequest req,HttpServletResponse resp) try int edit = this.bookDao.edit(req.getParameterMap()); ObjectMapper om=new ObjectMapper(); ResponseUtil.write(resp, om.writeValueAsString(edit)); catch (Exception e) // TODO Auto-generated catch block e.printStackTrace(); return null; /** * 删除请求 * @param req * @param resp * @return */ public String remove(HttpServletRequest req,HttpServletResponse resp) try int remove=this.bookDao.remove(req.getParameterMap()); ObjectMapper om=new ObjectMapper(); ResponseUtil.write(resp, om.writeValueAsString(remove)); catch (Exception e) // TODO: handle exception e.printStackTrace(); return null;
mvc.xml的配置
<?xml version="1.0" encoding="UTF-8"?>
<config>
<!-- <action path="/regAction" type="test.RegAction">
<forward name="failed" path="/reg.jsp" redirect="false" />
<forward name="success" path="/login.jsp" redirect="true" />
</action> -->
<action path="/menuAction" type="com.liuwenwu.web.MenuAction">
<forward name="index" path="/index.jsp" redirect="false" />
</action>
<action path="/userAction" type="com.liuwenwu.web.UserAction">
<forward name="index" path="/index.jsp" redirect="false" />
</action>
<action path="/bookAction" type="com.liuwenwu.web.BookAction">
<forward name="index" path="/index.jsp" redirect="false" />
</action>
</config>
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