Structure d'un fichier JSON
Bonjour,
Je doit parser un fichier JSON, je n'ai pas de soucis avec un fichier de type :
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| {
"Users": [
{
"firstname": "",
"lastname": "",
"login": "",
"twitter": "",
"mail": "",
"telephone" :
{
"fixe": "",
"mobile": ""
}
},
{
"firstname": "",
"lastname": "",
"login": "",
"twitter": "",
"mail": "",
"telephone" :
{
"fixe": "",
"mobile": ""
}
}
]
} |
J'utilise le code suivant :
UsersController
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| package com.example.parsingtest;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
import android.os.Environment;
public class UsersController {
private static final String DL_URL = "http://XXX/users.json";
private ObjectMapper objectMapper = null;
private JsonFactory jsonFactory = null;
private JsonParser jp = null;
private ArrayList<User> userList = null;
private Users users = null;
private File jsonOutputFile;
private File jsonFile;
public UsersController() {
objectMapper = new ObjectMapper();
jsonFactory = new JsonFactory();
}
public void init() {
downloadJsonFile();
try{
jp = jsonFactory.createJsonParser(jsonFile);
users = objectMapper.readValue(jp, Users.class);
userList = users.get("users");
} catch(JsonParseException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
}
private void downloadJsonFile() {
try{
createFileAndDirectory();
URL url = new URL(UsersController.DL_URL);
HttpURLConnection urlConnection;
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
FileOutputStream fileOutput = new FileOutputStream(jsonFile);
InputStream inputStream = urlConnection.getInputStream();
byte[] buffer = new byte[1024];
int bufferLength = 0;
while((bufferLength = inputStream.read(buffer)) > 0) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
} catch(MalformedURLException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
}
private void createFileAndDirectory() throws FileNotFoundException {
final String extStorageDirectory = Environment
.getExternalStorageDirectory().toString();
final String meteoDirectory_path = extStorageDirectory + "/tutos-android";
jsonOutputFile = new File(meteoDirectory_path, "/");
if(jsonOutputFile.exists() == false)
jsonOutputFile.mkdirs();
jsonFile = new File(jsonOutputFile, "users.json");
}
public ArrayList<User> findAll() {
return userList;
}
public User findById(int id) {
return userList.get(id);
}
} |
User
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| package com.example.parsingtest;
public class User {
private String firstname;
private String lastname;
private String login;
private String twitter;
private String mail;
private Telephone telephone;
public User() {
super();
this.firstname = "";
this.lastname = "";
this.login = "";
this.twitter = "";
this.mail = "";
this.telephone = null;
}
public User(String firstName, String lastName, String login,
String twitter, String web) {
super();
this.firstname = firstName;
this.lastname = lastName;
this.login = login;
this.twitter = twitter;
this.mail = web;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstName) {
this.firstname = firstName;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastName) {
this.lastname = lastName;
}
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
public String getTwitter() {
return twitter;
}
public void setTwitter(String twitter) {
this.twitter = twitter;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public Telephone getTelephone() {
return telephone;
}
public void setTelephone(Telephone telephone) {
this.telephone = telephone;
}
} |
Users
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| package com.example.parsingtest;
import java.util.ArrayList;
import java.util.HashMap;
public class Users extends HashMap<String, ArrayList<User>> {
private static final long serialVersionUID = 1L;
} |
Telephone
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| package com.example.parsingtest;
import org.json.JSONObject;
public class Telephone extends JSONObject {
private String fixe;
private String mobile;
public String getFixe() {
return fixe;
}
public void setFixe(String fixe) {
this.fixe = fixe;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
} |
MainActivity
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| package com.example.parsingtest;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
private UsersController usersController;
private TextView displayJson;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
usersController = new UsersController();
displayJson = (TextView) findViewById(R.id.jsonDisplay);
Button startParsing = (Button) findViewById(R.id.startParsing);
startParsing.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
gettingJson();
}
});
}
final void gettingJson() {
final Thread checkUpdate = new Thread() {
public void run() {
usersController.init();
final StringBuilder str = new StringBuilder("user :\n ");
for (User u : usersController.findAll()) {
str.append("\n").append("first name : ").append(u.getFirstname());
str.append("\n").append("last name : ").append(u.getLastname());
str.append("\n").append("login : ").append(u.getLogin());
str.append("\n").append("twitter : ").append(u.getTwitter());
str.append("\n").append("Mail : ").append(u.getMail());
str.append("\n").append("Mobile : ").append(u.getTelephone().getMobile());
str.append("\n").append("Fixe : ").append(u.getTelephone().getFixe());
str.append("\n");
}
runOnUiThread(new Runnable() {
@Override
public void run() {
displayJson.setText(str.toString());
}
});
}
};
checkUpdate.start();
}
} |
Mais j'ai un gros problème avec un fichier de type :
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| {
"attribut": "",
"objetUsers" :
{
"Users": [
{
"firstname": "",
"lastname": "",
"login": "",
"twitter": "",
"mail": "",
"telephone" :
{
"fixe": "",
"mobile": ""
}
},
{
"firstname": "",
"lastname": "",
"login": "",
"twitter": "",
"mail": "",
"telephone" :
{
"fixe": "",
"mobile": ""
}
}
]
}
} |
Ces lignes en plus...
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| {
"attribut": "",
"objetUsers" :
{ |
J'ai tenter de modifier avec le code suivant...
ObjetUsers
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| package com.example.parsingtest;
import org.json.JSONObject;
public class ObjetUsers extends JSONObject {
private Users users;
public Users getUsers() {
return users;
}
public void setUsers(Users objetUsers) {
this.users = objetUsers;
}
} |
Users
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| package com.example.parsingtest;
import java.util.ArrayList;
public class Users {
private ArrayList<User> listUser;
public ArrayList<User> getListUser() {
return listUser;
}
public void setListUser(ArrayList<User> listUser) {
this.listUser = listUser;
}
} |
User
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| package com.example.parsingtest;
public class User {
private String firstname;
private String lastname;
private String login;
private String twitter;
private String mail;
private Telephone telephone;
public User() {
super();
this.firstname = "";
this.lastname = "";
this.login = "";
this.twitter = "";
this.mail = "";
this.telephone = null;
}
public User(String firstName, String lastName, String login,
String twitter, String web) {
super();
this.firstname = firstName;
this.lastname = lastName;
this.login = login;
this.twitter = twitter;
this.mail = web;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstName) {
this.firstname = firstName;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastName) {
this.lastname = lastName;
}
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
public String getTwitter() {
return twitter;
}
public void setTwitter(String twitter) {
this.twitter = twitter;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public Telephone getTelephone() {
return telephone;
}
public void setTelephone(Telephone telephone) {
this.telephone = telephone;
}
} |
Telephone
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| package com.example.parsingtest;
import org.json.JSONObject;
public class Telephone extends JSONObject {
private String fixe;
private String mobile;
public String getFixe() {
return fixe;
}
public void setFixe(String fixe) {
this.fixe = fixe;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
} |
UsersController
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| package com.example.parsingtest;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
import android.os.Environment;
public class UsersController {
private static final String DL_URL = "http://s414547850.onlinehome.fr/users.json";
private ObjectMapper objectMapper = null;
private JsonFactory jsonFactory = null;
private JsonParser jp = null;
private ArrayList<User> userList = null;
private Parse parse = null;
private File jsonOutputFile;
private File jsonFile;
public UsersController() {
objectMapper = new ObjectMapper();
jsonFactory = new JsonFactory();
}
public void init() {
downloadJsonFile();
try{
jp = jsonFactory.createJsonParser(jsonFile);
parse = objectMapper.readValue(jp, Parse.class);
userList = parse.getObjetUsers().getUsers().getListUser();
} catch(JsonParseException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
}
private void downloadJsonFile() {
try{
createFileAndDirectory();
URL url = new URL(UsersController.DL_URL);
HttpURLConnection urlConnection;
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
FileOutputStream fileOutput = new FileOutputStream(jsonFile);
InputStream inputStream = urlConnection.getInputStream();
byte[] buffer = new byte[1024];
int bufferLength = 0;
while((bufferLength = inputStream.read(buffer)) > 0) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
} catch(MalformedURLException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
}
private void createFileAndDirectory() throws FileNotFoundException {
final String extStorageDirectory = Environment
.getExternalStorageDirectory().toString();
final String meteoDirectory_path = extStorageDirectory + "/tutos-android";
jsonOutputFile = new File(meteoDirectory_path, "/");
if(jsonOutputFile.exists() == false)
jsonOutputFile.mkdirs();
jsonFile = new File(jsonOutputFile, "users.json");
}
public ArrayList<User> findAll() {
return userList;
}
public User findById(int id) {
return userList.get(id);
}
} |
Parse
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| package com.example.parsingtest;
public class Parse {
private String attribut;
private ObjetUsers objetUsers;
public String getAttribut() {
return attribut;
}
public void setAttribut(String attribut) {
this.attribut = attribut;
}
public ObjetUsers getObjetUsers() {
return objetUsers;
}
public void setObjetUsers(ObjetUsers objetUsers) {
this.objetUsers = objetUsers;
}
} |
... Mais cela ne fonctionne pas. Voici le logcat
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| 01-05 21:51:51.649: D/dalvikvm(327): GC freed 5586 objects / 356272 bytes in 59ms
01-05 21:51:51.829: D/dalvikvm(327): GC freed 13527 objects / 590536 bytes in 54ms
01-05 21:51:52.049: D/dalvikvm(327): GC freed 12646 objects / 504056 bytes in 55ms
01-05 21:51:52.079: W/System.err(327): org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "Users" (Class com.example.parsingtest.ObjetUsers), not marked as ignorable
01-05 21:51:52.079: W/System.err(327): at [Source: /sdcard/tutos-android/users.json; line: 5, column: 15] (through reference chain: com.example.parsingtest.Parse["objetUsers"]->com.example.parsingtest.ObjetUsers["Users"])
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.StdDeserializationContext.unknownFieldException(StdDeserializationContext.java:246)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.StdDeserializer.reportUnknownProperty(StdDeserializer.java:604)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.StdDeserializer.handleUnknownProperty(StdDeserializer.java:590)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.BeanDeserializer.handleUnknownProperty(BeanDeserializer.java:689)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:514)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:350)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:252)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.SettableBeanProperty$MethodProperty.deserializeAndSet(SettableBeanProperty.java:356)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:494)
01-05 21:51:52.079: W/System.err(327): at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:350)
01-05 21:51:52.090: W/System.err(327): at org.codehaus.jackson.map.ObjectMapper._readValue(ObjectMapper.java:2376)
01-05 21:51:52.090: W/System.err(327): at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1087)
01-05 21:51:52.090: W/System.err(327): at com.example.parsingtest.UsersController.init(UsersController.java:41)
01-05 21:51:52.090: W/System.err(327): at com.example.parsingtest.MainActivity$2.run(MainActivity.java:37)
01-05 21:51:52.090: W/dalvikvm(327): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
01-05 21:51:52.090: E/AndroidRuntime(327): Uncaught handler: thread Thread-8 exiting due to uncaught exception
01-05 21:51:52.090: E/AndroidRuntime(327): java.lang.NullPointerException
01-05 21:51:52.090: E/AndroidRuntime(327): at com.example.parsingtest.MainActivity$2.run(MainActivity.java:39)
01-05 21:51:52.109: I/dalvikvm(327): threadid=7: reacting to signal 3
01-05 21:51:52.109: E/dalvikvm(327): Unable to open stack trace file '/data/anr/traces.txt': Permission denied |
Le problème et que je sais même pas si je m'y prend bien au niveau de la structure du fichier Json, et du coup de mes classes. Est-ce que le problème viens de la structure ou des quelques lignes suivantes ?
Code:
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| public void init() {
downloadJsonFile();
try{
jp = jsonFactory.createJsonParser(jsonFile);
parse = objectMapper.readValue(jp, Parse.class);
userList = parse.getObjetUsers().getUsers().getListUser();
} catch(JsonParseException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
} |
Merci d'avance...
