postman 如何实现传递 ArrayList 给后台

package com.gpdi.lxq.eladmin.entity.page; 
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
 
/**
 * @description:分页请求
 * @author: Lxq
 * @date: 2020/1/19 17:27
 */
public class PageRequest {
 
    /**
     * 当前页码
     */
    private int pageNum = 1;
    /**
     * 每页数量
     */
    private int pageSize = 10; 
    public List<Map<String, Object>> getParams() {
        return params;
    }
 
    public void setParams(List<Map<String, Object>> params) {
        this.params = params;
    }
 
    /**
     * 查询参数
     */
    private List<Map<String, Object>> params = new ArrayList<>(); 
    public int getPageNum() {
        return pageNum;
    }
    public void setPageNum(int pageNum) {
        this.pageNum = pageNum;
    }
    public int getPageSize() {
        return pageSize;
    }
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
    public Object getParam(String key) {
        return getParams().get(0).get(key);
    }
}