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这篇CFSDN的博客文章java的JsonObject对象提取值方法由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.
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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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我.
原文链接：https://blog.csdn.net/qq_37581708/article/details/72367803 。
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