大致思路:
1.先将list集合一条一条的放入map中
2.再用List<Map<String, Object>> result 将之前的map装进来
3.gson.toJson(result)便可以得到json格式的list集合
代码如下:
List<ImageInfo> imageInfos = imageFaceService.FindAll();
List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
Map<String, Object> map = null;
for (ImageInfo img : imageInfos) {
map = new HashMap<String, Object>();
map.put("image_id", img.getImage_id());
map.put("image_name", img.getImage_name());
map.put("image_path", img.getImage_path());
map.put("image_feature", img.getImage_feature());
result.add(map);
}
Gson gson = new Gson();
return gson.toJson(result);