1. json数组生成table列
2. 表格数据本地分页
3. 列支持动态显示/隐藏，列顺序支持自定义
4. 编辑行，根据行数据动态生成form
5. form支持自定义校验

<template>
<div>
    <div id="box">
        <el-table :data="tableData.slice((page.currentPage - 1) * page.pageSize, page.currentPage * page.pageSize)" ref="table" style="width: 100%" border height="400">
            <el-table-column v-for="item in headList"  align="center" show-overflow-tooltip width="100px" :prop="item.prop" :key="item.prop+Math.random()" :label="item.label"></el-table-column>
            <el-table-column fixed="right" align="center">
                <template slot="header" >
                    <el-button type="primary" size="small" icon="el-icon-s-tools" circle  @click="delHeader"></el-button>
                </template>
                <template slot-scope="scope">
                    <span class="editrow" @click="editrow(scope.row)">编辑</span>
                </template>
            </el-table-column>
        </el-table>
        <div class="block" style="text-align:right;margin-top:10px">
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="page.currentPage"
                :page-sizes="page.sizesArray"
                :page-size="page.pageSize"
                layout="total, prev, pager, next, jumper, sizes"
                :total="page.total">
            </el-pagination>
        </div>
    </div>
    
    <el-dialog title="编辑" :visible.sync="dialogVisible" width="600px" >
        <div  style="height:400px;overflow:auto;">
            <el-form :model="addOrUpdateForm" ref="addOrUpdateForm" label-width="100px" class="demo-dynamic" :rules="rules">
                <el-form-item v-for="(item, index) in headList" :label="item.label" :key="index" :prop="item.prop">
                    <el-input v-model="addOrUpdateForm[item.prop]" ></el-input>
                </el-form-item>
            </el-form>
        </div>
        <span slot="footer" class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="submitForm('addOrUpdateForm')">确 定</el-button>
        </span>
    </el-dialog>
 
    <el-dialog title="列操作" :visible.sync="colOprationVisible" width="600px" >
        <div  style="height:400px;overflow:auto;">
            <el-table :data="formList" style="width: 100%" border height="400">
                <el-table-column align="center" width="100px" prop="prop"  label="列名"></el-table-column>
                <el-table-column label="是否启用">
                    <template slot-scope="scope">
                        <el-switch v-model="scope.row.show" :active-value="1" :inactive-value="2" active-color="#409eff" inactive-color="#B9B9B9"
                        @change="changeSwitch(scope.row)"/>
                    </template>
                </el-table-column>
                <el-table-column label="是否必填">
                    <template slot-scope="scope">
                        <el-switch v-model="scope.row.required" :active-value="1" :inactive-value="2" active-color="#409eff" inactive-color="#B9B9B9"
                        @change="changeSwitch(scope.row)"/>
                    </template>
                </el-table-column>
                <el-table-column align="center" width="100px" prop="sort"  label="排序"></el-table-column>
                <el-table-column label="操作" fixed="right" align="center"  width="150px">
                    <template slot-scope="scope">
                        <span v-if="scope.row.sort!=0" class="editrow" @click="up(scope.row)" style="margin-right:10px">上升</span>
                        <span v-if="scope.row.sort!=formList.length-1" class="editrow" style="margin-right:10px" @click="down(scope.row)">下降</span>
                        <span v-if="scope.row.sort!=0" class="editrow" @click="upToZero(scope.row)" style="margin-right:10px">置顶</span>
                        
                    </template>
                </el-table-column>
            </el-table>
        </div>
        <span slot="footer" class="dialog-footer">
            <el-button type="primary" @click="colOprationVisible = false">关 闭</el-button>
        </span>
    </el-dialog>
    
</div>
</template>
 
<script>
export default {
    data() {
        return {
            page:{
                currentPage: 1,     //当前第几页
                sizesArray: [10,20,30,50],//下拉每页条数
                pageSize: 10,   //每页条数
                total: 66   //总条数
            },
            colOprationVisible: false,
            dialogVisible: false,
            //列数
            collen: 2, 
            //原始列头
            formList: [],
            //展示的列头
            headList: [],
            //表格内容
            tableData: [],
            //校验规则
            rules: {},
            //编辑行数据
            addOrUpdateForm: {},
        };
    },
    mounted(){
        for(let i=0;i<this.collen;i++){
            this.formList.push({
                id: i,
                sort: i,
                required: 1,
                show: 1,
                prop: "column"+i,
                label: "column"+i
            })
        };
        this.delHeadData();
        for(let i=0;i<this.page.total;i++){
            this.tableData[i] = {id: i};
            for(let j=0;j<this.formList.length;j++){
                this.tableData[i][this.formList[j].prop] = i+"_"+j
            }
        }
    },
    methods: {
        editrow(row) {
            this.rules = {};
            this.headList.map(x=>{
                this.rules[x.prop] = []
                if(x.required==1){
                    this.rules[x.prop].push({required: true,message: '请输入'+x.label,trigger: 'blur'})
                }
                if(x.prop=="column1"){
                    this.rules[x.prop].push({validator: this.checkNumber,trigger: 'blur'})
                }
            });
            this.addOrUpdateForm = Object.assign({},row)
            this.dialogVisible = true;
        },
        checkNumber(rule, value, callback){
            if (!/^[1-9]\d*$/.test(value)) {
                callback(new Error('请输入数字'));
            } else {
                callback();
            }
        },
        submitForm(formName) {
            this.$refs[formName].validate((valid) => {
                if (valid) {
                    alert("submit!");
                } else {
                    console.log("error submit!!");
                    return false;
                }
            });
        },
        resetForm(formName) {
            this.$refs[formName].resetFields();
        },
        handleSizeChange(val) {
            this.page.pageSize = Number(val);
        },
        handleCurrentChange(val) {
            this.page.currentPage = Number(val);
        },
        changeSwitch(){
            this.delHeadData();
        },
        delHeader(){
            this.colOprationVisible = true;
        },
        up(row){
            let curr = row.sort;
            let next = this.formList[curr-1];
            row.sort = curr-1;
            this.formList[curr-1] = row;
            next.sort = curr;
            this.formList[curr] = next;
            this.delHeadData()
        },
        down(row){
            let curr = row.sort;
            let next = this.formList[curr+1];
            row.sort = curr+1;
            this.formList[curr+1] = row;
            next.sort = curr;
            this.formList[curr] = next;
            this.delHeadData()
        },
        upToZero(row){
            delete this.formList[row.sort];
            this.formList = this.formList.filter(x=>{
                return x
            });
            this.formList.unshift(row);
            this.formList.map((x,i)=>{
                x.sort = i;
            });
            this.delHeadData()
        },
        delHeadData(){
            this.headList = [];
            this.formList.map(x=>{
                if(x.show==1){
                    this.headList.push(x);
                }
            })
            this.headList = Object.assign([],this.headList)
            this.$nextTick(() => {
                this.$refs.table.doLayout();
            })
        }
    },
};
</script>
 
<style scoped>
#box{
    padding: 20px;
}
.demo-dynamic {
    width: 500px;
    padding: 20px;
}
.editrow {
    color: #409eff;
    cursor: pointer;
}
.el-pager li.active {
    color: #409eff;
    cursor: default;
}
.el-button--primary {
    color: #fff;
    background-color: #409eff;
    border-color: #409eff;
}
.el-table__fixed::before, .el-table__fixed-right::before{
    height: 0px;
}
</style>