使用LayUI操作数据表格
接着 上一篇 继续完善我们的demo,这次我们加一个搜索按钮
搜索
在table标签的上方，加入这样一组html
<div class="demoTable"> 搜索商户： <div class="layui-inline"> <input class="layui-input" name="keyword" id="demoReload" autocomplete="off"> div> <button class="layui-btn" data-type="reload">搜索button> div>
在js加入初始化代码和定义加载方法
layui.use('table', function(){
var table = layui.table;
//方法级渲染
table.render({
elem: '#LAY_table_user'
,url: 'UVServlet'
,cols: [[
{checkbox: true, fixed: true}
,{field:'id', title: 'ID', width:80, sort: true, fixed: true}
,{field:'aid', title: '商户', width:80, sort: true}
,{field:'uv', title: '访问量', width:80, sort: true,edit:true}
,{field:'date', title: '日期', width:180}
,{field:'datatype', title: '日期类型', width:100}
]]
,id: 'testReload'
,page: true
,height: 600
});
var $ = layui.$, active = {
reload: function(){
var demoReload = $('#demoReload');
table.reload('testReload', {
where: {
keyword: demoReload.val()
}
});
}
};
)};
绑定click点击事件
$('.demoTable .layui-btn').on('click', function(){
var type = $(this).data('type');
active[type] ? active[type].call(this) : '';
});
此时点击查询按钮，会将keyword这个关键字传到后端，接下来就是自己处理查询关键字业务了。
到目前为止，搜索也有了，分页也有了,对了，分页会自动传到后端page,limit2个值到后台，相当于（pageindex,pagesize）
预览下效果
看看请求的参数
从参数可以看出，数据表格默认是get请求
给表格增加操作按钮
首先加入一组html,放到table标签下面，代码如下
<table class="layui-hide" id="LAY_table_user" lay-filter="useruv">table>
然后在js中指定工具条
//方法级渲染 table.render({ elem: '#LAY_table_user' ,url: 'UVServlet' ,cols: [[ {checkbox: true, fixed: true} ,{field:'id', title: 'ID', width:80, sort: true, fixed: true} ,{field:'aid', title: '商户', width:80, sort: true} ,{field:'uv', title: '访问量', width:80, sort: true,edit:true} ,{field:'date', title: '日期', width:180} ,{field:'datatype', title: '日期类型', width:100} ,{field:'right', title: '操作', width:177,toolbar:"#barDemo"} ]] ,id: 'testReload' ,page: true ,height: 600 });
界面效果如下
接下来需要给按钮绑定事件，来完成功能操作
在LayUI里面，一般采用table.on()来表示事件，例如这个
//监听表格复选框选择 table.on('checkbox(useruv)', function(obj){ console.log(obj) });
我勾选一个复选框，就打印一个日志
加入以下js代码，来绑定工具条事件
//监听工具条 table.on('tool(demo)', function(obj){ var data = obj.data; if(obj.event === 'detail'){ layer.msg('ID：'+ data.id + ' 的查看操作'); } else if(obj.event === 'del'){ layer.confirm('真的删除行么', function(index){ obj.del(); layer.close(index); }); } else if(obj.event === 'edit'){ layer.alert('编辑行：
'+ JSON.stringify(data)) } });
这时候，点击按钮就会有反应了。这里说明一下
接下来就是把数据传递到后端，直接将js改造如下
//监听工具条 table.on('tool(useruv)', function(obj){ var data = obj.data; if(obj.event === 'detail'){ layer.msg('ID：'+ data.id + ' 的查看操作'); } else if(obj.event === 'del'){ layer.confirm('真的删除行么', function(index){ console.log(data); $.ajax({ url: "UVServlet", type: "POST", data:{"uvid":data.id,"memthodname":"deleteuv","aid":data.aid}, dataType: "json", success: function(data){ if(data.state==1){ //删除这一行 obj.del(); //关闭弹框 layer.close(index); layer.msg("删除成功", {icon: 6}); }else{ layer.msg("删除失败", {icon: 5}); } } }); }); } else if(obj.event === 'edit'){ layer.prompt({ formType: 2 ,title: '修改 ID 为 ['+ data.id +'] 的访问量' ,value: data.uv }, function(value, index){ //这里一般是发送修改的Ajax请求 EidtUv(data,value,index,obj); }); } }); 编辑的方法 function EidtUv(data,value,index,obj) { $.ajax({ url: "UVServlet", type: "POST", data:{"uvid":data.id,"memthodname":"edituv","aid":data.aid,"uv":value}, dataType: "json", success: function(data){ if(data.state==1){ //关闭弹框 layer.close(index); //同步更新表格和缓存对应的值 obj.update({ uv: value }); layer.msg("修改成功", {icon: 6}); }else{ layer.msg("修改失败", {icon: 5}); } } }); }
预览效果
至此，数据表格的绑定、展示、分页、搜索、查看、编辑、删除、排序 功能都已经完成，是不是很简单？
此处粘贴出完整的页面代码
DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>layuititle>
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="../Assets/css/layui.css">
head>
<body>
<div style="margin-bottom: 5px;">
<ins class="adsbygoogle" style="display:inline-block;width:700px;height:700px" data-ad-client="ca-pub-6111334333458862" data-ad-slot="3820120620">ins>
div>
<div class="demoTable">
搜索商户：
<div class="layui-inline">
<input class="layui-input" name="keyword" id="demoReload" autocomplete="off">
div>
<button class="layui-btn" data-type="reload">搜索button>
div>
<table class="layui-hide" id="LAY_table_user" lay-filter="useruv">table>
<script type="text/html" id="barDemo">
<a class="layui-btn layui-btn-primary layui-btn-mini" lay-event="detail">查看</a>
<a class="layui-btn layui-btn-mini" lay-event="edit">编辑</a>
<a class="layui-btn layui-btn-danger layui-btn-mini" lay-event="del">删除</a>
script>
<script src="../Assets/layui.js">script>
<script>
layui.use('table', function(){
var table = layui.table;
//方法级渲染
table.render({
elem: '#LAY_table_user'
,url: 'UVServlet'
,cols: [[
{checkbox: true, fixed: true}
,{field:'id', title: 'ID', width:80, sort: true, fixed: true}
,{field:'aid', title: '商户', width:80, sort: true}
,{field:'uv', title: '访问量', width:80, sort: true,edit:true}
,{field:'date', title: '日期', width:180}
,{field:'datatype', title: '日期类型', width:100}
,{field:'right', title: '操作', width:177,toolbar:"#barDemo"}
]]
,id: 'testReload'
,page: true
,height: 600
});
var $ = layui.$, active = {
reload: function(){
var demoReload = $('#demoReload');
table.reload('testReload', {
where: {
keyword: demoReload.val()
}
});
}
};
//监听表格复选框选择
table.on('checkbox(useruv)', function(obj){
console.log(obj)
});
//监听工具条
table.on('tool(useruv)', function(obj){
var data = obj.data;
if(obj.event === 'detail'){
layer.msg('ID：'+ data.id + ' 的查看操作');
} else if(obj.event === 'del'){
layer.confirm('真的删除行么', function(index){
console.log(data);
$.ajax({
url: "UVServlet",
type: "POST",
data:{"uvid":data.id,"memthodname":"deleteuv","aid":data.aid},
dataType: "json",
success: function(data){
if(data.state==1){
obj.del();
layer.close(index);
layer.msg("删除成功", {icon: 6});
}else{
layer.msg("删除失败", {icon: 5});
}
}
});
});
} else if(obj.event === 'edit'){
layer.prompt({
formType: 2
,title: '修改 ID 为 ['+ data.id +'] 的访问量'
,value: data.uv
}, function(value, index){
EidtUv(data,value,index,obj);
});
}
});
$('.demoTable .layui-btn').on('click', function(){
var type = $(this).data('type');
active[type] ? active[type].call(this) : '';
});
function EidtUv(data,value,index,obj) {
$.ajax({
url: "UVServlet",
type: "POST",
data:{"uvid":data.id,"memthodname":"edituv","aid":data.aid,"uv":value},
dataType: "json",
success: function(data){
if(data.state==1){
layer.close(index);
//同步更新表格和缓存对应的值
obj.update({
uv: value
});
layer.msg("修改成功", {icon: 6});
}else{
layer.msg("修改失败", {icon: 5});
}
}
});
}
});
script>
body>
html>
应大家要求，将servlet代码贴出来,其中用到了json.jar
import com.weimob.models.Pagination; import com.weimob.models.QueryResult; import com.weimob.models.UvData; import com.weimob.uv.dao.WeiMobUvDao; import org.json.JSONArray; import org.json.JSONObject; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.Map; @WebServlet(name="UVServlet", urlPatterns={"/WebApp/UVServlet"}, loadOnStartup=0) public class UVServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String memthodname = request.getParameter("memthodname"); if(memthodname!=null){ switch (memthodname){ case "queryList": break; case "deleteuv": deleteUv(request,response); break; case "edituv": edituv(request,response); break; default: queryList(request, response); } }else { queryList(request, response); } } private void queryList(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException { String str = request.getParameter("keyword"); String pindex = request.getParameter("page"); String limit = request.getParameter("limit"); response.setStatus(200); int aid = 0; int pagesize=15; int index = 0; int total = 0; if (str != null && str.length() > 0) { aid = Integer.valueOf(str); } if (pindex != null) { index = Integer.parseInt(pindex); pagesize=Integer.parseInt(limit); } WeiMobUvDao dao = new WeiMobUvDao(); StringBuffer sbtotal = new StringBuffer(); sbtotal.append("SELECT count(1) as count FROM WpMulShopDataUv_1 "); if (aid > 0) { sbtotal.append(" where aid="); sbtotal.append(aid); } total = dao.GetCount(sbtotal.toString()); if (total > 0) { StringBuffer sb = new StringBuffer(); sb.append("SELECT Id,AId,Uv,DataType,Date FROM WpMulShopDataUv_1 "); if (aid > 0) { sb.append(" where aid="); sb.append(aid); } if (total > pagesize) { sb.append(" Limit "); int start = (index - 1) * pagesize; if (start < 0) { start = 0; } sb.append(start); sb.append(","); sb.append(pagesize); } Listlist = dao.QueryUv(sb.toString()); QueryResult result = new QueryResult (total, list); String jsonstr= ConvertListToPageJson(list,total); System.out.println(jsonstr); request.setAttribute("result", jsonstr); response.getWriter().print(jsonstr); }else { QueryResult result = new QueryResult (total, null); JSONObject obj = new JSONObject(result); response.getWriter().print(obj); } } private void deleteUv(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException { String str = request.getParameter("aid"); String uvid = request.getParameter("uvid"); String limit = request.getParameter("limit"); response.setStatus(200); int aid = 0; int uv_id=0; int index = 0; int total = 0; if (str != null && str.length() > 0) { aid = Integer.valueOf(str); } if (uvid != null) { uv_id = Integer.parseInt(uvid); } if(uv_id<=0){ response.getWriter().print("参数无效"); } WeiMobUvDao dao = new WeiMobUvDao(); List list=new ArrayList (); list.add(uv_id); int res_count= dao.DeleteByIds(aid,list); JSONObject jsonObject = new JSONObject(); jsonObject.put("state",res_count>0?true:false); jsonObject.put("code",0); jsonObject.put("msg","null"); response.getWriter().print(jsonObject); } private void edituv(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException { String str = request.getParameter("aid"); String uvid = request.getParameter("uvid"); String uvstr = request.getParameter("uv"); response.setStatus(200); JSONObject jsonObject = new JSONObject(); int aid = 0; int uv_id=0; int uv = 0; if (str != null && str.length() > 0) { aid = Integer.valueOf(str); } if (uvid != null) { uv_id = Integer.parseInt(uvid); uv= Integer.parseInt(uvstr); } if(uv_id<=0){ response.setStatus(500); jsonObject.put("state",-1); jsonObject.put("msg","参数无效"); response.getWriter().print(jsonObject); } if(uv<0){ response.setStatus(500); jsonObject.put("state",-1); jsonObject.put("msg","参数无效"); response.getWriter().print(jsonObject); } WeiMobUvDao dao = new WeiMobUvDao(); List list=new ArrayList (); list.add(uv_id); UvData res= dao.getByIds(aid,uv_id); if(res==null){ response.setStatus(500); jsonObject.put("state",-1); jsonObject.put("msg","参数无效,对象不存在"); response.getWriter().print(jsonObject); return; } int res_count= dao.modifyEntity(res); jsonObject.put("state",res_count>0?true:false); jsonObject.put("code",0); jsonObject.put("msg","null"); response.getWriter().print(jsonObject); } public String ConvertListToPageJson(List list, int countList) { // 新建一个json数组 JSONArray jsonArray = new JSONArray(); // 新建一个json对象 JSONObject jsonObject = null; // 遍历泛型集合 for (Object object : list) { jsonObject = new JSONObject(object); jsonArray.put(jsonObject); } // 转换数据格式 String json = jsonArray.toString(); // 拼接字符串 StringBuffer sb = new StringBuffer(); sb.append("{\"count\":"); sb.append(countList); sb.append(",\"code\":"); sb.append(0); sb.append(",\"msg\":"); sb.append("null"); sb.append(",\"data\":"); sb.append(json); sb.append("}"); String jsonString = sb.toString(); return jsonString; } }
总结：
LayUI为我们提供了强大丰富的类库组件，完善的文档，学习成本和开发成本相对低廉，具有快速，扁平化等优点。
关于数据表格的介绍就到这里。官方文档