一、net.sf.json
1、Json轉Map
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
Map<String,Object> map = new HashMap<>();
map.put("code",jsonObject .getInt("code"));
2、Json轉實體
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
ArticleForm articleForm = (ArticleForm) JSONObject.toBean(jsonObject , ArticleForm.class);
如果實體中帶有List字段,需要指定泛型
Map<String, Class> classMap = new HashMap<String, Class>();
classMap.put("keywords", String.class);
ArticleForm articleForm = (ArticleForm) JSONObject.toBean(data.getJSONObject(i), ArticleForm.class,classMap);
3、Json轉集合
List<ArticleForm> list = new ArrayList<>();
JSONArray data = jsonObject.getJSONArray("data");
if (errorCode == 0 && data != null && !data.isEmpty()) {
for (int i = 0; i < data.size(); i++) {
Map<String, Class> classMap = new HashMap<String, Class>();
classMap.put("keywords", String.class);
ArticleForm articleForm = (ArticleForm) JSONObject.toBean(data.getJSONObject(i), ArticleForm.class,classMap);
list.add(articleForm);
}
}
另外一種:
List<ArticleForm> list = new ArrayList<>();
JSONArray data = jsonObject.getJSONArray("data");
if (errorCode == 0 && data != null && !data.isEmpty()) {
Map<String, Class> classMap = new HashMap<String, Class>();
classMap.put("keywords", String.class);
list = (List<ArticleForm>) JSONArray.toArray(data, ArticleForm.class,classMap);
}
二、com.alibaba.fastjson
1、Json轉Map
JSONObject jsonObject = JSON.parseObject(jsonStr);
Map<String,Object> map = new HashMap<>();
map.put("code",jsonObject .getInt("code"));
2、Json轉實體
ArticleForm articleForm = JSON.parseObject(jsonStr, new TypeReference<ArticleForm>() {});
3、Json轉集合
List<ArticleForm> list = JSON.parseObject(jsonStr,new TypeReference<ArrayList<ArticleForm>>() {});