java從JSONObject中取值
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 {
// 第一種格式
/**
* [ { "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>>>>>");
}// 第二種格式
/**
* [ { "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("看看有沒有值" + password);// 第三種格式
/**
* { "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");// 第四種格式
/**
* { "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 + "------------");
}}
}