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：