java的JsonObject对象提取值方法

时间:2022-09-11 08:13:34

实例如下所示:

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import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import io.swagger.models.auth.In;
import java.io.IOException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.Iterator;
/**
 * Created by Administrator on 2017/4/21.
 */
public class test {
  public static void main(String[] args) throws Exception {
    
    //第一种格式
      /**
        * [
        {
            "data ": [
            {
                "building_id ": "*** ",
                "building_num ": "** ",
                "door_name ": "** ",
                "electric ": "** ",
                "room_name ": "** "
            }
            ],
            "success ": true
            }
            ]
        */
    String s="[{\"success\":true,\"data\":[{\"building_id\":\"***\",\"building_num\":\"**\",\"room_name\":\"**\",\"door_name\":\"**\",\"electric\":\"**\"}]}]" ;
    String b= s.substring(0,s.length()-1);
    String c=b.substring(1, b.length());
    System.out.println(b+"b___");
    JSONObject jsonx = JSON.parseObject(c);
    JSONArray ja = jsonx.getJSONArray("data");
    for (int i = 0; i < ja.size(); i++) {
      JSONObject jo = ja.getJSONObject(i);
      String building_id = jo.getString("building_id");
      System.out.println(building_id+"building_id>>>>>");
    }
    //第二种格式
      /**
         * [
            {
                "password ": "*1234567890 ",
                "success ": "true "
            }
            ]
         */
    String s="[{\"success\":\"true\",\"password\":\"*1234567890\"}]";
    String b= s.substring(0,s.length()-1);
    String c=b.substring(1, b.length());
    System.out.println(c+"c___");
    JSONObject reagobj = JSONObject.fromObject(c);
    String name = reagobj.getString("password");
    System.out.println(name+"name,,,,,,");
    String password = jm.getString("password");
    System.out.println(password);
    System.out.println("看看有没有值"+password); 
    
        //第三种格式
        /**
        * {
        "data ": {
            "access_token ": "5a7040ccf66bafd06acd39b6f61c19230eaba426755509646d6da23ddd9fb206 ",
            "expires_second ": 36000
        },
        "rlt_code ": "HH0000 ",
        "rlt_msg ": "成功 "
        }
         */
    String res="{\"data\":{\"access_token\":\"5a7040ccf66bafd06acd39b6f61c19230eaba426755509646d6da23ddd9fb206\",\"expires_second\":36000},\"rlt_code\":\"HH0000\",\"rlt_msg\":\"成功\"}";
    JSONObject jsonObject= JSON.parseObject(res);
    String data = jsonObject.getString("data");
    JSONObject jsondata= JSON.parseObject(data);
    String token = jsondata.getString("access_token");
        
        //第四种格式
         /**
         * {
            "data ":
                {
                    "total ":23,
                    "start ":0,
                    "total_page ":3,
                    "rows ":
                        [
                            { "op_way ": "3 ", "user_mobile ": "15321918571 ", "op_time ":1493881391976, "pwd_no ":30},
                            { "op_way ": "1 ", "op_time ":1493880995000, "pwd_no ":31}
                        ],
                    "current_page ":1,
                    "page_size ":10
                },
            "rlt_code ": "HH0000 ",
            "rlt_msg ": "成功 "
        }
        */
    String res="{\"data\":{\"total\":23,\"start\":0,\"total_page\":3,\"rows\":[{\"op_way\":\"1\",\"op_time\":1493884964000,\"pwd_no\":31},{\"op_way\":\"3\",\"user_mobile\":\"18518517491\",\"op_time\":1493884615032,\"pwd_no\":30},{\"op_way\":\"3\",\"user_mobile\":\"18518517491\",\"op_time\":1493883836552,\"pwd_no\":30},{\"op_way\":\"1\",\"op_time\":1493883294000,\"pwd_no\":31},{\"op_way\":\"1\",\"op_time\":1493883256000,\"pwd_no\":31},{\"op_way\":\"3\",\"user_mobile\":\"15321918571\",\"op_time\":1493883015371,\"pwd_no\":30},{\"op_way\":\"1\",\"op_time\":1493882007000,\"pwd_no\":31},{\"op_way\":\"3\",\"user_mobile\":\"15321918571\",\"op_time\":1493881498520,\"pwd_no\":30},{\"op_way\":\"3\",\"user_mobile\":\"15321918571\",\"op_time\":1493881391976,\"pwd_no\":30},{\"op_way\":\"1\",\"op_time\":1493880995000,\"pwd_no\":31}],\"current_page\":1,\"page_size\":10},\"rlt_code\":\"HH0000\",\"rlt_msg\":\"成功\"}";
    JSONObject jsonObject= JSON.parseObject(res);
    String data = jsonObject.getString("data");
    JSONObject jsonObjects= JSON.parseObject(data);
    JSONArray ja = jsonObjects.getJSONArray("rows");
    for (int i = 0; i < ja.size(); i++) {
      JSONObject jo = ja.getJSONObject(i);
      String op_way = jo.getString("op_way");
      String op_time = jo.getString("op_time");
      SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      long lt = new Long(op_time);
      Date date = new Date(lt);
      res = simpleDateFormat.format(date);
      String pwd_no = jo.getString("pwd_no");
      String user_mobile = jo.getString("user_mobile");
      System.out.println(op_way+res+pwd_no+user_mobile+"------------");
    }
   
  
  }
  }

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原文链接:https://blog.csdn.net/qq_37581708/article/details/72367803