不同格式的json解析

文章目录

- - - - 一、基本数据格式
      - 1. 一个JSON对象
        2.一个JSON数组
        3.复杂JSONObject
        4. 复杂JSONArray
        5.更复杂的json
      - 二、解析
      - 2.1. JSONObject解析

一、基本数据格式

给服务端发送请求后，服务端会返回一连串的数据，这些数据在大部分情况下都是XML格式或者JSON格式。然后JSON相对XML来说解析相对方便一些，所以先说说JSON的解析。

JSON的基本数据格式有这几种：

1. 一个JSON对象

JSONObject

{"name": "胡小威","age": 20,"male": true
}

2.一个JSON数组

JSONArray


[{"name": "胡小威","age": 20,"male": true},{"name": "赵小亮","age": 22,"male": false}
]

3.复杂JSONObject


{"name": "胡小威","age": 20,"male": true,"address": {"street": "岳麓山南","city": "长沙","country": "中国"}
}

4. 复杂JSONArray

[{"name": "胡小威","age": 20,"male": true,"address": {"street": "岳麓山南","city": "长沙","country": "中国"}},{"name": "赵小亮","age": 22,"male": false,"address": {"street": "九州港","city": "珠海","country": "中国"}}
]

5.更复杂的json

爱帮公交上扒取的数据

{"buses": {"bus": [{"last_foot_dist": "0","time": "37","segments": {"segment": [{"line_name": "立珊专线(中南大学学生公寓-长沙火车站)","foot_dist": "362","stat_xys": "","stats": "岳麓山南;湖南师大;二里半;岳麓山北;市四医院;华图教育(太平街口);牛耳教育(南阳街口);韭菜园;曙光路口;长岛路口;长沙火车站","end_stat": "长沙火车站","line_xys": "","line_dist": "7535","start_stat": "岳麓山南"}]},"foot_dist": "362","dist": "7897"},{"last_foot_dist": "0","time": "41","segments": {"segment": [{"line_name": "旅1路(科教新村-长沙火车站)","foot_dist": "337","stat_xys": "","stats": "岳麓山南;湖南师大;二里半;岳麓山北;市四医院;华图教育(太平街口);蔡锷中路口;韭菜园;乔庄;曙光路口;长岛路口;五一东村;车站路口;长沙火车站","end_stat": "长沙火车站","line_xys": "","line_dist": "7822","start_stat": "岳麓山南"}]},"foot_dist": "337","dist": "8159"}]}
}

二、解析

2.1. JSONObject解析

{"name": "胡小威","age": 20,"male": true
}

package com.gblfy;import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;
import com.gblfy.utils.FastJsonUtil;
import org.junit.Test;import java.util.List;public class JsonApplicationTests {//把JSON数据转换成指定的java对象@Testpublic void fastJsonTest() {Student st = new Student().builder().name("雨昕").age(2).build();String json = FastJsonUtil.getBeanToJson(st);System.out.println("********对象转Json*********");System.out.println("json ::" + json);System.out.println("********Json转对象*********");Student newst = FastJsonUtil.getJsonToBean(json, Student.class);System.out.println("Name ::" + newst.getName());System.out.println("Age ::" + newst.getAge());}//解析JsonObject@Testpublic void parseJsonObject() {try {String json = "{\n" +"    \"name\": \"胡小威\",\n" +"    \"age\": 20,\n" +"    \"male\": true\n" +"}";System.out.println("*********单纯的从json数据中获取对应的值*********");JSONObject jb = JSON.parseObject(json);String name = jb.getString("name");int age = jb.getInteger("age");boolean male = jb.getBoolean("male");System.out.println("name:" + name);System.out.println("age:" + age);System.out.println("male:" + male);System.out.println("*********把JSON数据转换成指定的java对象*********");Student st = FastJsonUtil.getJsonToBean(json, Student.class);System.out.println("*********Student*********");System.out.println("name:" + st.getName());System.out.println("age:" + st.getAge());System.out.println("male:" + st.isMale());//接下来该干嘛干嘛} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}//解析JSONArray@Testpublic void parseJSONArray() {String json = "[\n" +"    {\n" +"        \"name\": \"胡小威\",\n" +"        \"age\": 20,\n" +"        \"male\": true\n" +"    },\n" +"    {\n" +"        \"name\": \"赵小亮\",\n" +"        \"age\": 22,\n" +"        \"male\": false\n" +"    }\n" +"]";try {System.out.println("*********把JSON数据转换成指定的java对象列表*********");List<Student> jsonToList = FastJsonUtil.getJsonToList(json, Student.class);for (Student st : jsonToList) {System.out.println("name: " + st.getName());System.out.println("age: " + st.getAge());System.out.println("male: " + st.isMale());}System.out.println("*********解析JSONArray*********");JSONArray jsonArray = JSON.parseArray(json);for (Object o : jsonArray) {Student st = (Student) o;System.out.println("name: " + st.getName());System.out.println("age: " + st.getAge());System.out.println("male: " + st.isMale());}//接下来该干嘛干嘛} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}//解析复杂JSONObject@Testpublic void parseJsonPerson() {String json = "{\n" +"    \"name\": \"胡小威\",\n" +"    \"age\": 20,\n" +"    \"male\": true,\n" +"    \"address\": {\n" +"        \"street\": \"岳麓山南\",\n" +"        \"city\": \"长沙\",\n" +"        \"country\": \"中国\"\n" +"    }\n" +"}";try {JSONObject jb = JSON.parseObject(json);String name = jb.getString("name");int age = jb.getInteger("age");boolean male = jb.getBoolean("male");JSONObject addressJSON = jb.getJSONObject("address");String street = addressJSON.getString("street");String city = addressJSON.getString("city");String country = addressJSON.getString("country");Address address = new Address(street, city, country);Student student = new Student(name, age, male, address);System.out.println("name: " + name);System.out.println("age: " + age);System.out.println("male: " + male);System.out.println("street: " + street);System.out.println("city: " + city);System.out.println("country: " + country);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}//解析复杂JSONArray@Testpublic void parseJsonArrayPerson() {String json="[\n" +"    {\n" +"        \"name\": \"胡小威\",\n" +"        \"age\": 20,\n" +"        \"male\": true,\n" +"        \"address\": {\n" +"            \"street\": \"岳麓山南\",\n" +"            \"city\": \"长沙\",\n" +"            \"country\": \"中国\"\n" +"        }\n" +"    },\n" +"    {\n" +"        \"name\": \"赵小亮\",\n" +"        \"age\": 22,\n" +"        \"male\": false,\n" +"        \"address\": {\n" +"            \"street\": \"九州港\",\n" +"            \"city\": \"珠海\",\n" +"            \"country\": \"中国\"\n" +"        }\n" +"    }\n" +"]";try {System.out.println("*********把JSON数据转换成指定的java对象列表*********");List<Student> jsonToList = FastJsonUtil.getJsonToList(json, Student.class);for (Student st : jsonToList) {System.out.println("name: " + st.getName());System.out.println("age: " + st.getAge());System.out.println("male: " + st.isMale());Address address = st.getAddress();System.out.println("street: " + address.getStreet());System.out.println("city: " + address.getCity());System.out.println("country: " + address.getCountry());Student student = new Student(st.getName(), st.getAge(), st.isMale(), address);System.out.println("student"+student.toString());}} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}@Testpublic void parseJSON(){String json="{\n" +"    \"buses\": {\n" +"        \"bus\": [\n" +"            {\n" +"                \"last_foot_dist\": \"0\",\n" +"                \"time\": \"37\",\n" +"                \"segments\": {\n" +"                    \"segment\": [\n" +"                        {\n" +"                            \"line_name\": \"立珊专线(中南大学学生公寓-长沙火车站)\",\n" +"                            \"foot_dist\": \"362\",\n" +"                            \"stat_xys\": \"\",\n" +"                            \"stats\": \"岳麓山南;湖南师大;二里半;岳麓山北;市四医院;华图教育(太平街口);牛耳教育(南阳街口);韭菜园;曙光路口;长岛路口;长沙火车站\",\n" +"                            \"end_stat\": \"长沙火车站\",\n" +"                            \"line_xys\": \"\",\n" +"                            \"line_dist\": \"7535\",\n" +"                            \"start_stat\": \"岳麓山南\"\n" +"                        }\n" +"                    ]\n" +"                },\n" +"                \"foot_dist\": \"362\",\n" +"                \"dist\": \"7897\"\n" +"            },\n" +"            {\n" +"                \"last_foot_dist\": \"0\",\n" +"                \"time\": \"41\",\n" +"                \"segments\": {\n" +"                    \"segment\": [\n" +"                        {\n" +"                            \"line_name\": \"旅1路(科教新村-长沙火车站)\",\n" +"                            \"foot_dist\": \"337\",\n" +"                            \"stat_xys\": \"\",\n" +"                            \"stats\": \"岳麓山南;湖南师大;二里半;岳麓山北;市四医院;华图教育(太平街口);蔡锷中路口;韭菜园;乔庄;曙光路口;长岛路口;五一东村;车站路口;长沙火车站\",\n" +"                            \"end_stat\": \"长沙火车站\",\n" +"                            \"line_xys\": \"\",\n" +"                            \"line_dist\": \"7822\",\n" +"                            \"start_stat\": \"岳麓山南\"\n" +"                        }\n" +"                    ]\n" +"                },\n" +"                \"foot_dist\": \"337\",\n" +"                \"dist\": \"8159\"\n" +"            }\n" +"        ]\n" +"    }\n" +"}";try {JSONObject jb = JSON.parseObject(json);String buses = jb.getString("buses");JSONObject jb2 = JSON.parseObject(buses);String bus2 = jb2.getString("bus");List<BusChild> bus = JSON.parseArray(bus2, BusChild.class);for (BusChild busChild : bus) {List<Segment> segmentList = busChild.getSegments();for (Segment segment : segmentList) {}}// String bus = jb.getString("bus");// Bus bus = FastJsonUtil.getJsonToBean(buses, Bus.class);// BusChild busChild = bus.getBusChild();// List<Segment> segments = busChild.getSegments();// for (Segment segment : segments) {//// }// List<BusChild> busChildList = FastJsonUtil.getJsonToList(buses, BusChild.class);// for (BusChild busChild : busChildList) {//     List<Segment> segmentList = busChild.getSegments();//     for (Segment segment : segmentList) {////     }// }//// JSONObject jb2 = JSON.parseObject(buses);//// String bus = jb2.getString("bus");// JSONObject jb3 = JSON.parseObject(bus);// String segments = jb3.getString("segments");//// List<Segment> jsonToList = FastJsonUtil.getJsonToList(segments, Segment.class);//// for (Segment segment : jsonToList) {//// }// for (BusChild busChild : jsonToList) {//     System.out.println(""+busChild.getLastFootDist());//     System.out.println(""+busChild.getTime());//     System.out.println(""+busChild.getFootDist());//     System.out.println(""+busChild.getDist());////     List<Segments> segmentsList = busChild.getSegments();//     for (Segments segment : segmentsList) {//         System.out.println("line_name: "+segment.getLineName());//         System.out.println("foot_dist: "+segment.getFootDist());//         System.out.println("stat_xys: "+segment.getStatXys());//         System.out.println("stats: "+segment.getStats());//         System.out.println("end_stat: "+segment.getEndStat());//         System.out.println("line_xys: "+segment.getLineXys());//         System.out.println("line_dist: "+segment.getLineDist());//         System.out.println("start_stat: "+segment.getStartStat());//     }//// }} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}//序列化时指定json的key值public static void main(String[] args) {Segment build = new Segment().builder().foot_dist("123").start_stat("456").stats("2").build();System.out.println("sss"+JSON.toJSONString(build));}
}

`package com.gblfy.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.TypeReference;

import java.util.List;
import java.util.Map;

public class FastJsonUtil {

/*** 功能描述：把JSON数据转换成指定的java对象** @param jsonData JSON数据* @param clazz    指定的java对象* @return 指定的java对象*/
public static <T> T getJsonToBean(String jsonData, Class<T> clazz) {return JSON.parseObject(jsonData, clazz);
}/*** 功能描述：把java对象转换成JSON数据** @param object java对象* @return JSON数据*/
public static String getBeanToJson(Object object) {return JSON.toJSONString(object);
}/*** 功能描述：把JSON数据转换成指定的java对象列表** @param jsonData JSON数据* @param clazz    指定的java对象* @return List<T>*/
public static <T> List<T> getJsonToList(String jsonData, Class<T> clazz) {return JSON.parseArray(jsonData, clazz);
}/*** 功能描述：把JSON数据转换成较为复杂的List<Map<String, Object>>** @param jsonData JSON数据* @return List<Map < String, Object>>*/
public static List<Map<String, Object>> getJsonToListMap(String jsonData) {return JSON.parseObject(jsonData, new TypeReference<List<Map<String, Object>>>() {});
}/*** List<T> 转 json 保存到数据库*/
public static <T> String listToJson(List<T> ts) {String jsons = JSON.toJSONString(ts);return jsons;
}/*** 两个类之间值的转换* 从object》》tClass** @param object 有数据的目标类* @param tClass 转换成的类* @param <T>* @return 返回tClass类*/
public static <T> T getObjectToClass(Object object, Class<T> tClass) {String json = getBeanToJson(object);return getJsonToBean(json, tClass);
}/*** json 转 List<T>*/
public static <T> List<T> jsonToList(String jsonString, Class<T> clazz) {@SuppressWarnings("unchecked")List<T> ts = JSONArray.parseArray(jsonString, clazz);return ts;
}

}`、