很多时候mysql的一列当中存的是json格式的数据，这时候如果要查询某个key对应的值的时候要如何查询呢，这里记录一种查询方法： json列的值： {"InventoryMainTypeCode": 1, "InventoryMainTypeName": "GOOD"} 现在要查询InventoryMainTypeCode为xxx或者InventoryMainTypeName为xxx的数据：（这里以springboot+mybatis为例子）代码：请求类： ```java Query query = new Query(); ``` ```java @Data public class Query implements Serializable { private Map featureMap = new HashMap<>(); public void setFeature(String feature) { if (StringUtils.isNotBlank(feature)) { featureMap = JSON.parseObject(feature, Map.class); } } public void addFeature(String key, Object value) { if (StringUtils.isBlank(key)) { return; } this.featureMap.put(key, value); } public void addFeatureMap(Map featureMaps) { if (MapUtils.isNotEmpty(featureMaps)){ this.featureMap.putAll(featureMaps); } } } ``` 在代码中将key添加到Feature中： ```java query.addFeature(DicConst.InventoryMainTypeCode.name(), 1); List dTOS = dictionaryManager.queryDicByParam(query); ``` mapper文件： ```java List queryDicByParam(CnbDictionaryQuery query); ``` xml: ```xml ```