layui table默认跳页后不存在源页面选中的状态。如果要实现记录源页面的选中状态，需要定义一个全局变量来记录数据选中状态。
1、修改table.js
;layui.define(["laytpl", "laypage", "layer", "form"], function (e) { "use strict"; var t = layui.$, i = layui.laytpl, a = layui.laypage, l = layui.layer, n = layui.form, o = layui.hint(), r = layui.device(), d = { //layuiPageCheckedIds变量记录选中的数据id，格式是“,1,2,3,4,”的字符串 config: {checkName: "LAY_CHECKED", indexName: "LAY_TABLE_INDEX", layuiPageCheckedIds: ","}, cache: {}, index: layui.table ? layui.table.index + 1e4 : 0, set: function (e) { var i = this; return i.config = t.extend({}, i.config, e), i }, on: function (e, t) { return layui.onevent.call(this, s, e, t) } } ... S.prototype.pullData = function (e, i) { var a = this, n = a.config, o = n.request, r = n.response, d = function () { "object" == typeof n.initSort && a.sort(n.initSort.field, n.initSort.type) }; if (a.startTime = (new Date).getTime(), n.url) { var c = {}; //在发送请求前将选中的数据放入条件中 if(n.layuiPageCheckedIds != undefined && "" != n.layuiPageCheckedIds){ n.where.layuiCheckedIds = n.layuiPageCheckedIds; } if(tableRender){ var currPageNumber = getPageNumber(); c[o.pageName] = currPageNumber; tableRender = false; }else{ setPageNumberCookie(e); c[o.pageName] = e; } c[o.limitName] = n.limit; t.ajax({ type: n.method || "get", url: n.url, data: t.extend(c, n.where), dataType: "json", success: function (t) { if(null != startLoading){ layer.close(startLoading); startLoading = null; } return t[r.statusName] != r.statusCode ? (a.renderForm(), a.layMain.html('<div>' + (t[r.msgName] || "返回的数据状态异常") + "</div>")) : (a.renderData(t, e, t[r.countName]), d(), n.time = (new Date).getTime() - a.startTime + " ms", i && l.close(i), void("function" == typeof n.done && n.done(t, e, t[r.countName]))) }, error: function (e, t) { a.layMain.html('<div>数据接口请求异常</div>'), a.renderForm(), i && l.close(i) } }); } else if (n.data && n.data.constructor === Array) { if(null != startLoading){ layer.close(startLoading); startLoading = null; } var s = {}, u = e * n.limit - n.limit; s[r.dataName] = n.data.concat().splice(u, n.limit), s[r.countName] = n.data.length, a.renderData(s, e, n.data.length), d(), "function" == typeof n.done && n.done(s, e, s[r.countName]) } } ... //在文件的最后添加设置选中变量的方法 //设置初始选中值 ,d.initPageCheckedIds=function(e,i){ if(i == undefined || i == ""){ i = ""; } if(i.length > 0 && "," != i.substring(0,1)){ i = "," + i; } if(i.length > 0 && "," != i.substring(i.length - 1, i.length)){ i = i + ","; } c.config[e].layuiPageCheckedIds = i; }, //获取选中的ids, 参数e表示table的id d.getLayuiPageCheckedIds=function (e) { return c.config[e].layuiPageCheckedIds; }, //设置选中的ids,e表示table的id,obj表示选中的行数据，v表示记录哪一个参数 d.setLayuiPageCheckedIds=function (e,obj,v) { var a = c.config[e]; var layuiPageCheckedIds = a.layuiPageCheckedIds; //全选按钮 if(obj.type == "all"){ //全选 if (obj.checked) { var checkStatus = d.checkStatus(e); var datas = checkStatus.data; for(var i = 0; i < datas.length; i++) { layuiPageCheckedIds = d.setPageSelected(layuiPageCheckedIds, datas[i][v]); } } //取消全选 else { var cache = d.cache; var datas = cache[e]; for(var i = 0; i < datas.length; i++) { layuiPageCheckedIds = d.cancelPageSelected(layuiPageCheckedIds, datas[i][v]); } } } //单行选中 else { //选中 if (obj.checked) { layuiPageCheckedIds = d.setPageSelected(layuiPageCheckedIds, obj.data[v]); } //取消选中 else { layuiPageCheckedIds = d.cancelPageSelected(layuiPageCheckedIds, obj.data[v]); } } a.layuiPageCheckedIds = layuiPageCheckedIds; }, //添加选中项 d.setPageSelected=function(layuiPageCheckedIds, seleted){ if(layuiPageCheckedIds == undefined || layuiPageCheckedIds == ""){ return "," + seleted + ","; }else{ return layuiPageCheckedIds + seleted + ","; } }, //取消选中项 d.cancelPageSelected=function (layuiPageCheckedIds, seleted) { var match = "," + seleted + ","; var pos = layuiPageCheckedIds.indexOf(match); if (pos >= 0) { return layuiPageCheckedIds.substring(0, pos) + layuiPageCheckedIds.substring(pos + match.length - 1); } } });
2、后台根据id设置数据选中状态
@RequestMapping(value = "/search", method = RequestMethod.GET) @ResponseBody public Map<String, Object> search(Pageable pageable, @RequestParam List<Long> layuiCheckedIds) { Map<String, Object> rst = new HashMap<>(4); rst.put("code", 0); rst.put("msg", ""); Page<Person> page = personService.findPage(pageable); rst.put("count", page.getTotalSize()); List<Map<String, Object>> datas = new ArrayList<>(8); for (Person person : page.getContent()) { Map<String, Object> view = new HashMap<>(4); view.put("id", person.getId()); view.put("name", person.getName()); //如果person.getId()已经被选中，则设置选中状态 if (!CollectionUtils.isEmpty(layuiCheckedIds) && layuiCheckedIds.contains(person.getId())) { view.put("LAY_CHECKED", true); } ... datas.add(view); } rst.put("data", datas); return rst; }
3、前端用法