后端使用requestBody接收list集合，以及前端vue传参数组方式

前提是必须要post请求，get经测试不行
后端入参直接用@requestBody去接

    @PostMapping
    @ApiOperationSupport(order = 4)
    @ApiOperation(value = "新增", notes = "传入exhibitionAreaRelicsRelation")
    @PreAuth("hasPermission('exhibitionAreaRelicsRelation:create')")
    public R save(@Valid @RequestBody List<ExhibitionAreaRelicsRelationVO> list) {
        for (int i = 0; i < list.size(); i++) {
            exhibitionAreaRelicsRelationService.save(list.get(i));
        }
        return R.success("添加成功");
    }

前端，直接将数组丢进去即可 addSub(list)

  rowSaveSub(row, loading, done) {
        var list = []
        for (let index = 0; index < this.selectionChangeaddList.length; index++) {
          row = {
            ...row,
            exhibitionAreaId: this.exhibitionAreaId,
            relicsId: this.selectionChangeaddList[index].relicsId
          }
          list.push(row)
        }
        addSub(list).then(
          () => {
            loading()
            this.onLoadSub(this.pageSub)
            this.$message({
              type: 'success',
              message: '操作成功!'
            })
          },
          error => {
            done()
            window.console.log(error)
          }
        )
      },

export const add = row => {
  return request({
    url: '/api/area/relics/relation',
    method: 'post',
    data: row
  })
}