背景：
前端：入参为字符串和数组类型；通过json字符串传给后台，
后台：后台通过工具解析为Map<String，Object>，然后需要解析出Map里面的数组值做操作；
需求：
入参：
{
“addOrModify”: “add”,
“hrBdName”: “陕西省”,
“hrBdCode”: “1001”,
“hrBuName”: [“宝鸡市”,“咸阳市”,“汉中市”,“渭南市”],
“hrBuCode”: [“100101”,“100102”,“100103”,“100104”]
}
需转化为：List<Map<String,String>>，入库保存；
[{hrBdName=陕西省,hrBdCode=1001,hrBuName=宝鸡市,hrBuCode=100101},
{hrBdName=陕西省,hrBdCode=1001,hrBuName=咸阳市,hrBuCode=100102},
{hrBdName=陕西省,hrBdCode=1001,hrBuName=汉中市,hrBuCode=100103},
{hrBdName=陕西省,hrBdCode=1001,hrBuName=渭南市,hrBuCode=100104}]

Postman入参：

控制层：
转化为Map<String,Object>

    public Result addOrModifyConfig(@RequestBody String param) {
        try {
            Map<String, Object> paramMap = JsonUtils.readValue(param, Map.class);
            xxxListService.addOrModifyConfig(paramMap);
        } catch (Exception e) {
            log.error("XxxListController addOrModifyConfig is error===:" + e.getMessage(), e);
            return Result.failure("更新失败");
        }
        return Result.success().result(null);
    }
    

业务层：
业务逻辑：将入参处理为：List<Map<String,String>>格式：

	public Result addOrModifyConfig(Map<String, Object> paramMap) {
        String addOrModify = String.valueOf(paramMap.get("addOrModify"));
        if(addOrModify.equals("add")){
            paramMap.remove("addOrModify");
            List<Map<String,String>> list = new ArrayList<>();
            String hrBdName = String.valueOf(paramMap.get("hrBdName"));
            String hrBdCode = String.valueOf(paramMap.get("hrBdCode"));
			// hrBuName,hrBuCode 前台传数组，经过工具转为Map<String,Object>,
			// 因为数据比较简单，所以强转为字符串，去除符号[],切割为数组；
            String[] hrBuNameArr = String.valueOf(paramMap.get("hrBuName")).
                              replace("[","").replace("]","").split(",");
            String[] hrBuCodeArr = String.valueOf(paramMap.get("hrBuCode")).
                              replace("[","").replace("]","").split(",");
            if(hrBuNameArr.length == hrBuCodeArr.length && hrBuNameArr.length > 0){
                for (int j = 0; j < hrBuNameArr.length; j++) {
                    Map<String,String> map = new HashMap<>();
                    map.put("bdname",hrBdName);
                    map.put("bdno",hrBdCode);
                    map.put("buname",hrBuNameArr[j]);
                    map.put("buno",hrBuCodeArr[j]);
                    list.add(map);
                }
            }
            // 2.查询本数据库数据；
            List<Map<String,String>> magList = xxxListMapper.selectDepartAll();
            Iterator<Map<String, String>> iterator = list.iterator();
            while (iterator.hasNext()){
                Map<String, String> next = iterator.next();
                String bdname = String.valueOf(next.get("bdname"));
                String bdno = String.valueOf(next.get("bdno"));
                String buname = String.valueOf(next.get("buname"));
                String buno = String.valueOf(next.get("buno"));
                next.put("isEnable","1");
                next.put("dicType","icanDepart");
                Iterator<Map<String, String>> iterator2 = magList.iterator();
                while (iterator2.hasNext()){
                    Map<String, String> next2 = iterator2.next();
                    String bdname2 = String.valueOf(next2.get("bdname"));
                    String bdno2 = String.valueOf(next2.get("bdno"));
                    String buname2 = String.valueOf(next2.get("buname"));
                    String buno2 = String.valueOf(next2.get("buno"));
                    if(bdname.equals(bdname2) && bdno.equals(bdno2) && buname.equals(buname2) && buno.equals(buno2)){
                        iterator.remove();
                    }
                }
            }
            if(list.size() > 0){
                xxxListMapper.addOrModifyConfig(list);
            }
        }

持久层：数据入库代码

	<select id="selectDepartAll" resultType="map">
        SELECT *
        FROM xxx_department_list_dic where 1 = 1
    </select>	

	<!-- 入库保存 -->
    <insert id="addOrModifyConfig" parameterType="java.util.List">
        <foreach collection="list" item="res" index="index" separator=";">
            INSERT IGNORE INTO xxx_department_list_dic
            <foreach collection="res.entrySet()" index="key" separator="," open="(" close=")">
                ${key}
            </foreach>
            VALUES
            <foreach collection="res.entrySet()" item="value" separator="," open="(" close=")">
                #{value}
            </foreach>
        </foreach>
    </insert>
    

最终目的：