java的JsonObject对象提取值

<code class="language-java">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+"------------");
        }



    }

    }</code>