java从JSONObject中取值

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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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版权声明：本文为CSDN博主「kxj19980524」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/kxj19980524/article/details/83718971

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