最近做的一个项目，要求新增和修改不要用弹出框的形式，而是希望可以直接再表格中进行添加修改，作为后端的我，一脸懵逼，后来查看文档，总结如下，以便学习。

最终效果如下：

直接上代码：

前端：

 1、三个按钮，新增、保存、批量新增的按钮：

    <el-row class="mb20" style="font-weight: bold">费用明细</el-row>
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          @click="addLine()"
          size="mini"
          v-hasPermi="['detail:bill:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-circle-check"
          @click="insertSaveAll()"
          size="mini"
          v-hasPermi="['detail:bill:save']"
        >保存</el-button>
      </el-col>
      <el-col :span="1.5">
          <el-button
            type="info"
            plain
            icon="el-icon-circle-check"
            @click="batchInsert()"
            size="mini"
            v-hasPermi="['detail:bill:batchAdd']"
          >批量新增</el-button>
      </el-col>
    </el-row>

2、表格的代码块，其中的showInput是后端返回的，前端也尝试过添加到返回集中，但是有问题，所以还是在后端新增了一个字段，比较好处理 。

<el-table v-loading="loading" :data="detailList"  border>
      <el-table-column label="费用分类" align="center" >
        <template slot-scope="scope">
            <el-select v-if="scope.row.showInput" filterable clearable v-model="scope.row.typeId" @change="getFreeTwo(scope.row.typeId)" placeholder="请选择费用分类">
              <el-option
                v-for="item in freeTypeOne"
                :key="item.id"
                :label="item.name"
                :value="item.id">
              </el-option>
            </el-select>
            <span v-else>{{scope.row.typeName}}</span>
        </template>
      </el-table-column>
      <el-table-column label="费用类型" align="center" >
        <template slot-scope="scope">
          <el-select v-if="scope.row.showInput" filterable clearable v-model="scope.row.parentId" @change="getSelectItem(scope.row.parentId)" placeholder="请选择费用类型">
              <el-option
                v-for="item in freeTypeTwo"
                :key="item.id"
                :label="item.name"
                :value="item.id">
              </el-option>
          </el-select>
          <span v-else>{{scope.row.parentName}}</span>
        </template>
      </el-table-column>
      <el-table-column label="费用项" align="center" >
        <template slot-scope="scope">
          <el-select v-if="scope.row.showInput" filterable clearable v-model="scope.row.freeItemId" placeholder="请选择费用项">
                <el-option
                  v-for="item in freeTypeThree"
                  :key="item.id"
                  :label="item.name"
                  :value="item.id">
                </el-option>
          </el-select>
          <span v-else>{{scope.row.freeItemName}}</span>
        </template>
      </el-table-column>
      <el-table-column label="项目订单" align="center" >
        <template slot-scope="scope">
          <el-select v-if="scope.row.showInput" filterable clearable v-model="scope.row.projectId" placeholder="请选择项目订单">
                <el-option
                  v-for="item in projectList"
                  :key="item.id"
                  :label="item.name"
                  :value="item.id">
                </el-option>
          </el-select>
          <span v-else>{{scope.row.projectName}}</span>
        </template>
      </el-table-column>
      <el-table-column label="预算金额" min-width="100" align="center" prop="budgetAmount" >
        <template slot-scope="scope">
            <input v-if="scope.row.showInput" type="number" v-model="scope.row.budgetAmount"  />
            <span v-else>{{scope.row.budgetAmount}}</span>
        </template>
      </el-table-column>
      <el-table-column label="实际金额" min-width="100" align="center" prop="actualAmount" >
        <template slot-scope="scope">
            <input v-if="scope.row.showInput" type="number" v-model="scope.row.actualAmount"  />
            <span v-else>{{scope.row.actualAmount}}</span>
        </template>
      </el-table-column>
      <el-table-column label="备注" min-width="100" align="center" prop="remark" >
        <template slot-scope="scope">
            <input  v-if="scope.row.showInput" type="text" v-model="scope.row.remark"  />
            <span v-else>{{scope.row.remark}}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['detail:bill:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['detail:bill:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

3、定义后端返回的表格数据

// 在data里面维护单据数据
billData:{},
// 在data里定义 行 数据，用于当作Id，删除的时候用
i:1,

// 在methods里实现点击新增按钮新增一条数据
methods: {

    /* 新增一行 */
    addLine(){
      this.detailList.push({
          line:++this.i,
          showInput:true
      })
    },

}

4、修改按钮

/** 修改按钮操作 */
handleUpdate(row) {
   row.showInput = true;
},

5、保存按钮

/* 保存所有 */
    insertSaveAll(){
      saveAll({
        mapList:this.detailList
      }).then(response => {
          this.$modal.msgSuccess("新增成功");
          this.open = false;
          this.getList();
      });
    },

6、删除按钮

/** 删除按钮操作 */
    handleDelete(row) {
      console.log(row)
      var ids = row.id;
      if(ids == "" || ids == null || ids == undefined ){
        return this.detailList =  this.detailList.filter(x => x.line !=row.line);
      }
      this.$modal.confirm('是否确认删除该数据项？').then(function() {
        return delDetail([ids]);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    },

7、查询表格数据

/** 查询费用明细列表 */
    getList() {
      this.loading = true;
      listDetail(this.queryParams).then(response => {
        this.detailList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },

java后端：

@GetMapping("/list") public TableDataInfo list(@RequestParam Long pageSize, @RequestParam Long pageNum,TbBillDetail tbBillDetail) { startPage(); List<TbBillDetail> list = tbBillDetailService.selectTbBillDetailList(tbBillDetail); return getDataTable(list); }

 @Override
    public List<TbBillDetail> selectTbBillDetailList(TbBillDetail tbBillDetail) {
        List<TbBillDetail> details = tbBillDetailMapper.selectTbBillDetailList(tbBillDetail);
        if (ObjectUtil.isNotNull(details)) {
            details.forEach(d -> {
                d.setShowInput(false);
            });
        }
        return details;
    }