解析JSON通用工具类

 比较仓促，持续优化

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.springframework.web.client.RestTemplate;
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import java.util.HashMap;
import java.util.Map;
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/**
*解析SON
*/
public class JSONUtil {
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    private JSONObject object;
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    private Map<String,Object> map = new HashMap();
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    public JSONUtil(String json){
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        this.object = JSON.parseObject(json);
    }
    public JSONUtil(){ }
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    public Map getJsonMap (){
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        return jsonLoop(this.object,"");
    }
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    private Map jsonLoop(Object object, String key) {
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        if(object instanceof JSONObject) {
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            JSONObject jsonObject = (JSONObject) object;
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            for (Map.Entry<String, Object> entry: jsonObject.entrySet()) {
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                String key2 = "";
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                if(key.equals("")){
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                    key2 = entry.getKey();
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                }else {
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                    key2 = key + "." + entry.getKey();
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                }
                Object o = entry.getValue();
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                if(judgeObject(o)) {
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                    map.put(key2,entry.getValue());
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                } else {
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                    this.jsonLoop(o,key2);
                }
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            }
        }else {
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            map.put(key,object);
        }
        if(object instanceof JSONArray) {
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            JSONArray jsonArray = (JSONArray) object;
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            for(int i = 0; i < jsonArray.size(); i ++) {
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                if(judgeObject(jsonArray.get(i))){
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                    map.put(key,object);
​                    //注释后遍历数组
                    //break;
                }
                this.jsonLoop(jsonArray.get(i),key+"["+i+"]");
            }
        }
        return map;
    }
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    private boolean judgeObject(Object o){
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        boolean b = false;
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        try {
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            if(!(o instanceof JSONObject || o instanceof JSONArray)){
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                b = true;
            }
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        }catch (Exception e){
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        }
        return b;
    }
    public static void main(String[] args) {
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        //JSON格式接口地址
        //String url = "";
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        //RestTemplate restTpl = RestTemplateUtil.restTemplate();
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        //String restStr = restTpl.getForObject(url,String.class).trim();
        String restStr = "{\"result\":{\"data\":\"123\",\"array\":[4,5,6]},\"status\":\"ok\"}";
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        JSONUtil jsonUtil = new JSONUtil(reststr);
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        Map<String,String> map = jsonUtil.getJsonMap();
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        System.out.println(JSON.toJSONString(map.get("result.data")));// "123"

        System.out.println(JSON.toJSONString(map.get("status")));//"ok"

        System.out.println(JSON.toJSONString(map.get("result.array")));[4,5,6]

        System.out.println(JSON.toJSONString(map.get("result.array[0]")));4
​
    }
}
​