实例如下所示：
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+"------------"); } } }以上这篇java的JsonObject对象提取值方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持武林网。