Android JSON数据格式解析

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.复杂一点的JSONObject

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

4.复杂一点的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.来个更复杂的，这是我从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"}]}}

接下来是解析部分

一、直接解析

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

public void parseJsonObject(String json) {
try {
JSONObject jsonObject = new JSONObject(json);
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
boolean male = jsonObject.getBoolean("male");
//接下来该干嘛干嘛
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

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

public void parseJSONArray(String json) {
try {
JSONArray jsonArray = new JSONArray(json);
for (int i = 0; i < jsonArray.length(); i++) {
jsonObject = jsonArray.getJSONObject(i);
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
boolean male = jsonObject.getBoolean("male");
//接下来该干嘛干嘛
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

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

public void parseJsonPerson(String json) {
try {
JSONObject jsonObject = new JSONObject(json);
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
boolean male = jsonObject.getBoolean("male");
JSONObject addressJSON = jsonObject.getJSONObject("address");
String street = addressJSON.getString("street");
String city = addressJSON.getString("city");
String country = addressJSON.getString("country");
Address address = new Address(street, city, country);
Person person = new Person(name, age, male, address);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

4.[{"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"}}]

public void parseJsonArrayPerson(String json) {
List<Person> persons = new ArrayList<Person>();
try {
jsonArray = new JSONArray(json);
for (int i = 0; i < jsonArray.length(); i++) {
jsonObject = jsonArray.getJSONObject(i);
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
boolean male = jsonObject.getBoolean("male");
JSONObject addressJSON = jsonObject.getJSONObject("address");
String street = addressJSON.getString("street");
String city = addressJSON.getString("city");
String country = addressJSON.getString("country");
Address address = new Address(street, city, country);
Person person = new Person(name, age, male, address);
persons.add(person);
Log.v("juno", person.toString());
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.v("juno", persons.toString());
}

5. {"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"}]}}

public List<Salution> parseJSON(String str){
Log.d("返回的JSON数据：", str);
List<Salution> busList = new ArrayList<Salution>();

try {
JSONObject jsonObject = new JSONObject(str);
JSONObject busesJSON = jsonObject.getJSONObject("buses");
JSONArray busJSArray=busesJSON.getJSONArray("bus");
for(int i=0;i<busJSArray.length();i++){
JSONObject busJSObject = busJSArray.getJSONObject(i);
JSONObject segsJSObject=busJSObject.getJSONObject("segments");
JSONArray segJSArray=segsJSObject.getJSONArray("segment");
Salution st=new Salution();

for(int j=0;j<segJSArray.length();j++){
if(j==0){
JSONObject segJSObject = segJSArray.getJSONObject(j);
st.setLine_name1(segJSObject.getString("line_name"));
Log.d("line_name", segJSObject.getString("line_name"));
st.setStats1(segJSObject.getString("stats"));
st.setEnd_stat1(segJSObject.getString("end_stat"));
st.setStart_stat1(segJSObject.getString("start_stat"));
}
if(j==1){
JSONObject segJSObject = segJSArray.getJSONObject(j);
st.setLine_name2(segJSObject.getString("line_name"));
Log.d("line_name", segJSObject.getString("line_name"));
st.setStats2(segJSObject.getString("stats"));
st.setEnd_stat2(segJSObject.getString("end_stat"));
st.setStart_stat2(segJSObject.getString("start_stat"));
}
}

busList.add(st);
}
return busList;
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}

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