1、前端 用 JSON.stringify(addArrayObj) ；//addArrayObj 是json格式化字符串

2、import com.alibaba.fastjson.JSON;

List<StudyObjectRecommend> indexList =  JSON.parseArray(recommendStr, StudyObjectRecommend.class);  

接受到的 JSON格式化字符串recommendStr

StudyObjectRecommend是实体类，属性与json传递值一致