Android中复杂Json数据的解析
16lz
2021-01-22
摘要:Gson解析复杂的json数据 在这里介绍解析json数据的另外一种方法就是通过Gson解析,对于解析比较简单的json数据我就不介绍了来一个比较复杂一点的json数据,如下面我们要解析的一个json数据: [java]view plaincopy ...
Gson解析复杂的json数据
在这里介绍解析json数据的另外一种方法就是通过Gson解析,对于解析比较简单的json数据我就不介绍了来一个比较复杂一点的json数据,如下面我们要解析的一个json数据:
[java]view plaincopy- Stringjson={"a":"100","b":[{"b1":"b_value1","b2":"b_value2"},{"b1":"b_value1","b2":"b_value2"}],"c":{"c1":"c_value1","c2":"c_value2"}}
如果使用JsonObject和JsonArray的配合起来使用也是可以解析的但是解析起来就比较麻烦了,如果使用Gson解析就比较简单了,首先我们需要定义一个序列化的Bean,这里采用内部类的形式,这样比较容易看得清晰些
首先我们需要定义一个序列化的Bean,这里采用内部类的形式,看起来会比较清晰一些:
- publicclassJsonBean{
- publicStringa;
- publicList<B>b;
- publicCc;
- publicstaticclassB{
- publicStringb1;
- publicStringb2;
- }
- publicstaticclassC{
- publicStringc1;
- publicStringc2;
- }
- }
很多时候大家都是不知道这个Bean是该怎么定义,这里面需要注意几点:
1、内部嵌套的类必须是static的,要不然解析会出错;
2、类里面的属性名必须跟Json字段里面的Key是一模一样的;
3、内部嵌套的用[]括起来的部分是一个List,所以定义为 public List<B> b,而只用{}嵌套的就定义为 public C c,
具体的大家对照Json字符串看看就明白了,不明白的我们可以互相交流,本人也是开发新手!
- Gsongson=newGson();
- java.lang.reflect.Typetype=newTypeToken<JsonBean>(){}.getType();
- JsonBeanjsonBean=gson.fromJson(json,type);
如果需要解析的Json嵌套了很多层,同样可以可以定义一个嵌套很多层内部类的Bean,需要细心的对照Json字段来定义哦。
下面我将以一个具体的列子来说明通过Gson方式解析复杂的json数据
1.将要解析的数据如下面的格式
{
"error": 0,
"status": "success",
"date": "2014-05-10",
"results": [
{
"currentCity": "南京",
"weather_data": [
{
"date": "周六(今天, 实时:19℃)",
"dayPictureUrl": "http://api.map.baidu.com/images/weather/day/dayu.png",
"nightPictureUrl": "http://api.map.baidu.com/images/weather/night/dayu.png",
"weather": "大雨",
"wind": "东南风5-6级",
"temperature": "18℃"
},
{
"date": "周日",
"dayPictureUrl": "http://api.map.baidu.com/images/weather/day/zhenyu.png",
"nightPictureUrl": "http://api.map.baidu.com/images/weather/night/duoyun.png",
"weather": "阵雨转多云",
"wind": "西北风4-5级",
"temperature": "21 ~ 14℃"
}
]
}
]
}
2.必须定义如下一些的javaBean数据
Status.java
[java]view plaincopy
- publicclassStatus
- {
- privateStringerror;
- privateStringstatus;
- privateStringdate;
- privateList<Results>results;
- publicStringgetError()
- {
- returnerror;
- }
- publicvoidsetError(Stringerror)
- {
- this.error=error;
- }
- publicStringgetStatus()
- {
- returnstatus;
- }
- publicvoidsetStatus(Stringstatus)
- {
- this.status=status;
- }
- publicStringgetDate()
- {
- returndate;
- }
- publicvoidsetDate(Stringdate)
- {
- this.date=date;
- }
- publicList<Results>getResults()
- {
- returnresults;
- }
- publicvoidsetResults(List<Results>results)
- {
- this.results=results;
- }
- @Override
- publicStringtoString()
- {
- return"Status[error="+error+",status="+status
- +",date="+date+",results="+results+"]";
- }
[java]view plaincopy
- publicclassResults
- {
- privateStringcurrentCity;
- privateList<Weather>weather_data;
- publicStringgetCurrentCity()
- {
- returncurrentCity;
- }
- publicvoidsetCurrentCity(StringcurrentCity)
- {
- this.currentCity=currentCity;
- }
- publicList<Weather>getWeather_data()
- {
- returnweather_data;
- }
- publicvoidsetWeather_data(List<Weather>weather_data)
- {
- this.weather_data=weather_data;
- }
- @Override
- publicStringtoString()
- {
- return"Results[currentCity="+currentCity+",weather_data="
- +weather_data+"]";
- }
Weather.java
[java]view plaincopy
- publicclassWeather{
- privateStringdate;
- privateStringdayPictureUrl;
- privateStringnightPictureUrl;
- privateStringweather;
- privateStringwind;
- privateStringtemperature;
- publicStringgetDate(){
- returndate;
- }
- publicvoidsetDate(Stringdate){
- this.date=date;
- }
- publicStringgetDayPictureUrl(){
- returndayPictureUrl;
- }
- publicvoidsetDayPictureUrl(StringdayPictureUrl){
- this.dayPictureUrl=dayPictureUrl;
- }
- publicStringgetNightPictureUrl(){
- returnnightPictureUrl;
- }
- publicvoidsetNightPictureUrl(StringnightPictureUrl){
- this.nightPictureUrl=nightPictureUrl;
- }
- publicStringgetWeather(){
- returnweather;
- }
- publicvoidsetWeather(Stringweather){
- this.weather=weather;
- }
- publicStringgetWind(){
- returnwind;
- }
- publicvoidsetWind(Stringwind){
- this.wind=wind;
- }
- publicStringgetTemperature(){
- returntemperature;
- }
- publicvoidsetTemperature(Stringtemperature){
- this.temperature=temperature;
- }
- @Override
- publicStringtoString(){
- return"Weather[date="+date+",dayPictureUrl="
- +dayPictureUrl+",nightPictureUrl="
- +nightPictureUrl+",weather="+weather
- +",wind="+wind+",temperature="+temperature
- +"]";
- }
[java]view plaincopy
- publicclassMainActivityextendsActivity
- {
- privateButtontojson;
- RequestQueuemQueue;
- StringRequeststringRequest;
- Gsongson;
- Stringstr;
- @Override
- protectedvoidonCreate(BundlesavedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- tojson=(Button)findViewById(R.id.tojson);
- gson=newGson();
- mQueue=Volley.newRequestQueue(MainActivity.this);
- //http://10.19.20.12/upgrade/test.txt是测试使用的json数据
- stringRequest=newStringRequest("http://10.19.20.12/upgrade/test.txt",
- newResponse.Listener<String>()
- {
- @Override
- publicvoidonResponse(Stringresponse)
- {
- Log.d("TAG",response);
- System.out.println("response="+response);
- Statusstatus=gson.fromJson(response,Status.class);
- System.out.println("status="+status);
- System.out.println("-------------------------------------");
- List<Results>result=status.getResults();
- System.out.println("result="+result);
- }
- },
- newResponse.ErrorListener()
- {
- @Override
- publicvoidonErrorResponse(VolleyErrorerror)
- {
- Log.e("TAG",error.getMessage(),error);
- }
- });
- tojson.setOnClickListener(newOnClickListener()
- {
- @Override
- publicvoidonClick(Viewv)
- {
- mQueue.add(stringRequest);
- }
- });
- }
- }
- </span>
大家可以仔细的去拜读。转载:http://blog.csdn.net/tkwxty/article/details/34474501
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