java 给json的KEY改名

    public void import10(){
        TagImgFilter filter = new TagImgFilter();//更改的集合
        filter.setEq_orgId("c1fa7ba875fa4c9a899e2787eb79e802");
        filter.setEq_setId("d5e8f01a2e6649cf877eacda8ceb6ff1");
        filter.setEq_typeId("52336e7e43204fa68c006692b355137a");
        filter.setNull_tagJson(false);// 是否要有标注的,true是没标注
        List<TagImg> imgList = tagImgService.selectAll(filter);
        System.out.println(imgList.size());
        int countadd = 0;
        for (TagImg tagimg : imgList) {
            countadd++;
            System.out.println(countadd);
            String json=tagimg.getTagJson();
            JSONArray array=JSONArray.parseArray(json);
            JSONArray arrayNew=new JSONArray();
            if(array!=null && array.size()>0){
                for(int i=0;i<array.size();i++){
                    JSONObject obj = array.getJSONObject(i);                
                    obj.put("classname",obj.get("mark"));                    
                    obj.remove("mark");                    
                    arrayNew.add(obj);
                }
                tagimg.setTagJson(arrayNew.toString());
                tagImgService.save(tagimg);
            }            
        }    
    }