一、前言
1.1 前言
上一篇文章我们一起做了LayUI的动态添加选项卡,这一篇文章我们继续来进行对LayUI的学习,开始编写一下LayUI的增删改查吧!
1.2 前端代码(数据表格组件)
这里就先把从官网上演变过来的一些前端代码粘贴过来:userManage.jsp
<%@ 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"> <script type="text/javascript" src="${pageContext.request.contextPath }/static/js/system/userManage.js"></script> <title>用户管理</title> </head> <body> <!-- 搜索栏 --> <div class="layui-form-item"> <div class="layui-inline"> <label class="layui-form-label">用户名:</label> <div class="layui-input-inline"> <input type="text" id="name" placeholder="请输入用户名" autocomplete="off" class="layui-input"> </div> </div> <div class="layui-inline"> <div class="layui-input-inline"> <button id="btn_search" type="button" class="layui-btn layui-btn-normal"> <i class="layui-icon layui-icon-search"></i> 查询 </button> <button id="btn_add" type="button" class="layui-btn">新增</button> </div> </div> </div> <!-- 数据表格及分页 --> <table id="tb" lay-filter="tb" class="layui-table" style="margin-top:-15px;" lay-filter="tb_goods"> </table> <!-- 对话框(新增和编辑共用一个页面) --> <script type="text/html" id="toolbar"> <button class="layui-btn layui-btn-sm" lay-event="edit">编辑</button> <button class="layui-btn layui-btn-sm" lay-event="del">删除</button> <button class="layui-btn layui-btn-sm" lay-event="reset">重置密码</button> </script> </body> </html>
1.3 封装JS
接着我们把我们需要的js全部封装好:userManage.js
let layer,$,table; layui.use(['jquery', 'layer', 'table'], function(){ layer = layui.layer ,$ = layui.jquery ,table = layui.table; //初始化数据表格 initTable(); //绑定查询按钮的点击事件 $('#btn_search').click(function(){ query(); }); }); //在页面中的<table>中必须配置lay-filter="tb_goods"属性才能触发属性!!! table.on('tool(tb)', function (obj) { row = obj.data; if (obj.event == "edit") { open("编辑"); }else if(obj.event == "del"){ layer.confirm('确认删除吗?', {icon: 3, title:'提示'}, function(index){ $.post($("#ctx").val()+'/user.action',{ 'methodName':'del', 'id':row.id },function(rs){ if(rs.success){ //调用查询方法刷新数据 query(); }else{ layer.msg(rs.msg,function(){}); } },'json'); layer.close(index); }); }else{ } }); //1.初始化数据表格 function initTable(){ table.render({ //执行渲染 elem: '#tb', //指定原始表格元素选择器(推荐id选择器) // url: 'user.action?methodName=list', //请求地址 height: 340, //自定义高度 loading: false, //是否显示加载条(默认 true) cols: [[ //设置表头 {field: 'id', title: '用户编号', width: 120}, {field: 'name', title: '用户名', width: 120}, {field: 'loginName', title: '登录账号', width: 140}, {field: '', title: '操作', width: 220,toolbar:'#toolbar'}, ]] }); } //2.点击查询 function query(){ table.reload('tb', { url: $("#ctx").val()+'/user.action', //请求地址 method: 'POST', //请求方式,GET或者POST loading: true, //是否显示加载条(默认 true) page: true, //是否分页 where: { //设定异步数据接口的额外参数,任意设 'methodName':'listUserRole', 'name':$('#name').val() }, request: { //自定义分页请求参数名 pageName: 'page', //页码的参数名称,默认:page limitName: 'rows' //每页数据量的参数名,默认:limit } }); } //3.对话框 function open(title){ layer.open({ type: 2, //layer提供了5种层类型。可传入的值有:0(信息框,默认)1(页面层)2(iframe层)3(加载层)4(tips层) title:title, area: ['660px', '340px'], //宽高 skin: 'layui-layer-rim', //样式类名 content: $("#ctx").val()+'/jsp/system/userEdit.jsp', //书本编辑页面 btn:['保存','关闭'], yes: function(index, layero){ //调用子页面中提供的getData方法,快速获取子页面的form表单数据 //jQuery.find let data= $(layero).find("iframe")[0].contentWindow.getData(); console.log(data); //判断title标题 let methodName="add"; if(title=="编辑") methodName="edit"; $.post($("#ctx").val()+'/user.action?methodName='+methodName, data,function(rs){ if(rs.success){ //关闭对话框 layer.closeAll(); //调用查询方法刷新数据 query(); }else{ layer.msg(rs.msg,function(){}); } },'json'); }, btn2: function(index, layero){ layer.closeAll(); } }); }
我们再放上引入的公共页面:header.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!-- 引入 layui.css --> <link rel="stylesheet" href="${pageContext.request.contextPath }/static/js/layui/css/layui.css"> <!-- 引入 layui.js --> <script src="${pageContext.request.contextPath }/static/js/layui/layui.js"></script> <!-- 指定整个项目的根路径 --> <base href="${pageContext.request.contextPath }/" /> <!-- 隐藏域传值 --> <input id="ctx" value="${pageContext.request.contextPath }" type="hidden"/>
前端建立好了后,我们看看运行效果:
二、LayUI增删改查的后台代码
2.1 编写Dao方法
我们首先还是要写一个查询的方法:UserDao--->List
/** * 查询用户信息对应的角色,角色是通过case when得来的 * @param user * @param pageBean * @return * @throws Exception */ public List<Map<String,Object>> list(User user,PageBean pageBean) throws Exception { String sql = "select *\r\n" + ",(case rid \r\n" + "when 1 then '管理员' \r\n" + "when 2 then '发起者' \r\n" + "when 3 then '审批者' \r\n" + "when 4 then '参与者' \r\n" + "when 5 then '会议室管理员' \r\n" + "else '其他角色' end \r\n" + ") roleName \r\n" + "from \r\n" + "t_oa_user where 1=1 "; String name = user.getName(); if(StringUtils.isNotBlank(name)) { sql += " and name like '%"+name+"%'"; } return super.executeQuery(sql, pageBean); }
运行测试:
2.1 增加
我们继续编写增加的方法:Add
public int add(User user) throws Exception { String sql = "insert into t_oa_user(name,loginName,pwd) values(?,?,?)"; return super.executeUpdate(sql, user, new String[] {"name","loginName","pwd"}); }
2.2 删除
public int del(User user) throws Exception { String sql = "delete from t_oa_user where id = ?"; return super.executeUpdate(sql, user, new String[] {"id"}); }
2.3 修改
public int edit(User user) throws Exception { String sql = "update t_oa_user set name=?,loginName=?,pwd=? where id = ?"; return super.executeUpdate(sql, user, new String[] {"name","loginName","pwd","id"}); }
当我们写好了增删改查的Dao方法后,就可以开始编写UserAction啦~
package com.leaf.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.leaf.dao.UserDao; import com.leaf.entity.User; import com.leaf.mvc.ActionSupport; import com.leaf.mvc.ModelDriven; import com.leaf.util.PageBean; import com.leaf.util.R; import com.leaf.util.ResponseUtil; public class UserAction extends ActionSupport implements ModelDriven<User> { private User user = new User(); private UserDao ud = new UserDao(); //写一个方法处理前台的请求 public String login(HttpServletRequest req, HttpServletResponse resp) { Map<String, Object> map = new HashMap<String,Object>(); try { //调用Dao方法 User u = ud.login(user); if(u != null) { //登录成功 //ResponseUtil.writeJson(resp, new R().data("code",200).data("msg", "成功")); ResponseUtil.writeJson(resp, R.ok(200, "登录成功")); }else { //登录失败 //ResponseUtil.writeJson(resp, new R().data("code",0).data("msg", "账号密码错误")); ResponseUtil.writeJson(resp, R.ok(0, "用户名密码错误")); } } catch (Exception e) { e.printStackTrace(); try { ResponseUtil.writeJson(resp, R.ok(0, "登录失败")); } catch (Exception e1) { e1.printStackTrace(); } } return null; } //查询所有用户的方法 public String list(HttpServletRequest req, HttpServletResponse resp) { try { PageBean pageBean = new PageBean(); //初始化 pageBean.setRequest(req); List<Map<String, Object>> list = ud.list(user, pageBean); ResponseUtil.writeJson(resp, R.ok(0, "查询成功" ,pageBean.getTotal() ,user)); } catch (Exception e) { e.printStackTrace(); try { ResponseUtil.writeJson(resp, R.ok(0, "查询失败")); } catch (Exception e1) { e1.printStackTrace(); } } return null; } //增加的方法 public String add(HttpServletRequest req, HttpServletResponse resp) { try { //rs是SQL语句执行的影响行数 int rs = ud.add(user); //判断 if(rs > 0) { ResponseUtil.writeJson(resp, R.ok(200, "新增成功")); } else { ResponseUtil.writeJson(resp, R.ok(0, "新增失败")); } } catch (Exception e) { e.printStackTrace(); try { ResponseUtil.writeJson(resp, R.ok(0, "新增失败")); } catch (Exception e1) { e1.printStackTrace(); } } return null; } //删除的方法 public String del(HttpServletRequest req, HttpServletResponse resp) { try { //rs是SQL语句执行的影响行数 int rs = ud.del(user); //判断 if(rs > 0) { ResponseUtil.writeJson(resp, R.ok(200, "删除成功")); } else { ResponseUtil.writeJson(resp, R.ok(0, "删除失败")); } } catch (Exception e) { e.printStackTrace(); try { ResponseUtil.writeJson(resp, R.ok(0, "删除失败")); } catch (Exception e1) { e1.printStackTrace(); } } return null; } //修改的方法 public String edit(HttpServletRequest req, HttpServletResponse resp) { try { //rs是SQL语句执行的影响行数 int rs = ud.edit(user); //判断 if(rs > 0) { ResponseUtil.writeJson(resp, R.ok(200, "修改成功")); } else { ResponseUtil.writeJson(resp, R.ok(0, "修改失败")); } } catch (Exception e) { e.printStackTrace(); try { ResponseUtil.writeJson(resp, R.ok(0, "修改失败")); } catch (Exception e1) { e1.printStackTrace(); } } return null; } @Override public User getModel() { return user; } }
三、LayUI增删改查的前端代码
3.1 增加
我们需要建立一个增加的页面:userEdit
这个页面和编辑共用~
<%@ 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"> <script type="text/javascript" src="static/js/system/userEdit.js"></script> <title>用户新增</title> </head> <style> .layui-form-select dl{ max-height:150px; } </style> <body> <div style="padding:10px;"> <form class="layui-form layui-form-pane" lay-filter="user"> <input type="hidden" name="id"/> <div class="layui-form-item"> <label class="layui-form-label">用户名称</label> <div class="layui-input-block"> <input type="text" id="name" name="name" autocomplete="off" placeholder="请输入用户名" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">用户角色</label> <div class="layui-input-block"> <select name="rid"> <option value="">---请选择---</option> <option value="1">管理员</option> <option value="2">发起者</option> <option value="3">审批者</option> <option value="4">参与者</option> <option value="5">会议管理员</option> </select> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">登录账号</label> <div class="layui-input-block"> <input type="text" name="loginName" lay-verify="required" placeholder="请输入账号" autocomplete="off" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">登录密码</label> <div class="layui-input-block"> <input type="password" name="pwd" placeholder="请输入密码" autocomplete="off" class="layui-input"> </div> </div> </form> </div> </body> </html>
封装对应的JS:userEdit.js
let layer,form,$; layui.use(['layer','form','jquery'],function(){ layer=layui.layer,form=layui.form,$=layui.jquery; initData(); }); function initData(){ console.log(parent.row); if(null!=parent.row){ //因为layui.each内部的逻辑问题导致的所以要先深拷贝一份然后再去val //parent.row:表格行对象 form.val('user',$.extend({}, parent.row||{})); $('#name').attr('readonly','readonly'); } } function getData(){ //取user from中的值 return form.val('user'); }
OK,今天的学习笔记分享就到这里啦,我们呢下次再见!!!