com.google.gson.Gson类的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中com.google.gson.Gson类的一些代码示例，展示了Gson类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Gson类的具体详情如下：
包路径：com.google.gson.Gson
类名称：Gson

Gson介绍

[英]This is the main class for using Gson. Gson is typically used by first constructing a Gson instance and then invoking #toJson(Object) or #fromJson(String,Class)methods on it. Gson instances are Thread-safe so you can reuse them freely across multiple threads.

You can create a Gson instance by invoking new Gson() if the default configuration is all you need. You can also use GsonBuilder to build a Gson instance with various configuration options such as versioning support, pretty printing, custom JsonSerializers, JsonDeserializers, and InstanceCreators.

Here is an example of how Gson is used for a simple Class:

Gson gson = new Gson(); // Or use new GsonBuilder().create(); 
MyType target = new MyType(); 
String json = gson.toJson(target); // serializes target to Json 
MyType target2 = gson.fromJson(json, MyType.class); // deserializes json into target2

If the object that your are serializing/deserializing is a ParameterizedType(i.e. contains at least one type parameter and may be an array) then you must use the #toJson(Object,Type) or #fromJson(String,Type) method. Here is an example for serializing and deserialing a ParameterizedType:

Type listType = new TypeToken<List<String>>() {}.getType(); 
List<String> target = new LinkedList<String>(); 
target.add("blah"); 
Gson gson = new Gson(); 
String json = gson.toJson(target, listType); 
List<String> target2 = gson.fromJson(json, listType);

See the Gson User Guide for a more complete set of examples.
[中]这是使用Gson的主要类。Gson的使用通常是先构造一个Gson实例，然后在其上调用#toJson（Object）或#fromJson（String，Class）方法。Gson实例是线程安全的，因此您可以跨多个线程自由地重用它们。
如果您只需要默认配置，则可以通过调用new Gson（）创建一个Gson实例。您还可以使用GsonBuilder构建具有各种配置选项的Gson实例，如版本控制支持、漂亮打印、自定义JSONSerializer、JSONDeserializer和InstanceCreators。
下面是如何将Gson用于简单类的示例：

Gson gson = new Gson(); // Or use new GsonBuilder().create(); 
MyType target = new MyType(); 
String json = gson.toJson(target); // serializes target to Json 
MyType target2 = gson.fromJson(json, MyType.class); // deserializes json into target2

如果正在序列化/反序列化的对象是ParameterizedType（即，至少包含一个类型参数，并且可能是数组），则必须使用#toJson（对象，类型）或#fromJson（字符串，类型）方法。以下是序列化和反序列化参数化类型的示例：

Type listType = new TypeToken<List<String>>() {}.getType(); 
List<String> target = new LinkedList<String>(); 
target.add("blah"); 
Gson gson = new Gson(); 
String json = gson.toJson(target, listType); 
List<String> target2 = gson.fromJson(json, listType);

有关更完整的示例集，请参见{$0$}。

代码示例

代码示例来源：origin: skylot/jadx

private static <T> T get(String url, Type type) throws IOException {
    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();
    con.setRequestMethod("GET");
    if (con.getResponseCode() == 200) {
      Reader reader = new InputStreamReader(con.getInputStream(), StandardCharsets.UTF_8);
      return GSON.fromJson(reader, type);
    }
    return null;
  }
}

代码示例来源：origin: ata4/disunity

@Override
public void print(Collection<TableModel> models) {
  Gson gson = new GsonBuilder().setPrettyPrinting().create();
  JsonObject jsonRoot = new JsonObject();
  if (file != null) {
    jsonRoot.add("file", new JsonPrimitive(file.toString()));
  }
  models.forEach(model -> {
    jsonRoot.add(model.name().toLowerCase(), tableToJson(model.table(), gson));
  });
  gson.toJson(jsonRoot, out);
}

代码示例来源：origin: aa112901/remusic

@Override
protected Void doInBackground(Void... params) {
  gson = new Gson();
  JsonObject result = HttpUtil.getResposeJsonObject(BMA.GeDan.geDan(1, 10));
  if (result == null) {
    return null;
  }
  //热门歌单
  JsonArray pArray = result.get("content").getAsJsonArray();
  if (pArray == null) {
    return null;
  }
  int plen = pArray.size();
  for (int i = 0; i < plen; i++) {
    GedanInfo GedanInfo = gson.fromJson(pArray.get(i), GedanInfo.class);
    recommendList.add(GedanInfo);
  }
  return null;
}

代码示例来源：origin: apache/incubator-dubbo

/**
 * Describe a Java interface in Json schema.
 *
 * @return Service description
 */
public static String schema(final Class<?> clazz) {
  ServiceDefinition sd = build(clazz);
  Gson gson = new Gson();
  return gson.toJson(sd);
}

代码示例来源：origin: ctripcorp/apollo

private String mockLongPollBody(String notificationsStr) {
 List<ApolloConfigNotification> oldNotifications = gson.fromJson(notificationsStr, notificationType);
 List<ApolloConfigNotification> newNotifications = new ArrayList<>();
 for (ApolloConfigNotification notification : oldNotifications) {
  newNotifications
    .add(new ApolloConfigNotification(notification.getNamespaceName(), notification.getNotificationId() + 1));
 }
 return gson.toJson(newNotifications);
}

代码示例来源：origin: apache/incubator-gobblin

public static List<ProducerJob> deserialize(String jobs) {
 if (jobs == null || jobs.trim().isEmpty()) {
  jobs = "[]";
 }
 JsonArray jobsJson = new JsonParser().parse(jobs).getAsJsonArray();
 return new Gson().fromJson(jobsJson, new TypeToken<ArrayList<SimpleProducerJob>>() {
 }.getType());
}

代码示例来源：origin: Impetus/Kundera

Reader reader = new InputStreamReader(content);
JsonObject json = gson.fromJson(reader, JsonObject.class);
JsonElement jsonElement = json.get("rows");
JsonArray array = jsonElement.getAsJsonArray();
for (JsonElement element : array)
  JsonElement value = element.getAsJsonObject().get("value").getAsJsonObject().get(inverseJoinColumnName);
  if (value != null)

代码示例来源：origin: redwarp/9-Patch-Resizer

public void load(String path) {
 try {
  Gson gson = new Gson();
  JsonParser parser = new JsonParser();
  InputStream preferenceStream;
  try {
    parser.parse(new InputStreamReader(preferenceStream)).getAsJsonObject();
  JsonArray densitiesArray = densitiesObject.get(KEY_DENSITIES).getAsJsonArray();
  list = gson.fromJson(densitiesArray, listType);
  String defaultDensityName = densitiesObject.get(KEY_SOURCE).getAsString();
  for (ScreenDensity density : list) {
   if (density.getName().equals(defaultDensityName)) {
  JsonElement keepSameDensityElement = densitiesObject.get(
    KEY_KEEP_SAME_DENSITY_FILE);
  if (keepSameDensityElement != null) {

代码示例来源：origin: apache/incubator-gobblin

private JsonObject initResources(String resourceFilePath) {
 Type listType = new TypeToken<JsonObject>() {
 }.getType();
 Gson gson = new Gson();
 JsonObject testData =
   gson.fromJson(new InputStreamReader(this.getClass().getResourceAsStream(resourceFilePath)), listType);
 jsonRecord = testData.get("record").getAsJsonObject();
 jsonSchema = testData.get("schema").getAsJsonArray();
 WorkUnit workUnit = new WorkUnit(new SourceState(),
   new Extract(new SourceState(), Extract.TableType.SNAPSHOT_ONLY, "namespace", "dummy_table"));
 state = new WorkUnitState(workUnit);
 state.setProp(ConfigurationKeys.CONVERTER_AVRO_TIME_FORMAT, "HH:mm:ss");
 state.setProp(ConfigurationKeys.CONVERTER_AVRO_DATE_TIMEZONE, "PST");
 return testData;
}

代码示例来源：origin: Impetus/Kundera

kunderaMetadata);
String _id = object.get("_id").getAsString();
    Reader reader = new InputStreamReader(content);
    JsonObject jsonObject = gson.fromJson(reader, JsonObject.class);
    JsonElement rev = jsonObject.get("_rev");
    object.add("_rev", rev);

代码示例来源：origin: SpigotMC/BungeeCord

public JsonProvider(String resourcePath) throws IOException
{
  try ( InputStreamReader rd = new InputStreamReader( JsonProvider.class.getResourceAsStream( resourcePath ), Charsets.UTF_8 ) )
  {
    JsonObject obj = new Gson().fromJson( rd, JsonObject.class );
    for ( Map.Entry<String, JsonElement> entries : obj.entrySet() )
    {
      translations.put( entries.getKey(), entries.getValue().getAsString() );
    }
  }
}

代码示例来源：origin: apache/incubator-gobblin

@BeforeClass
public static void setUp() {
 Type listType = new TypeToken<JsonObject>() {
 }.getType();
 Gson gson = new Gson();
 JsonObject testData = gson.fromJson(
   new InputStreamReader(JsonIntermediateToParquetGroupConverter.class.getResourceAsStream(RESOURCE_PATH)), listType);
 testCases = testData.getAsJsonObject();
 SourceState source = new SourceState();
 workUnit = new WorkUnitState(
   source.createWorkUnit(source.createExtract(Extract.TableType.SNAPSHOT_ONLY, "test_namespace", "test_table")));
}

代码示例来源：origin: apache/incubator-gobblin

new BufferedReader(new InputStreamReader(response.getEntity().getContent(),
                        ConfigurationKeys.DEFAULT_CHARSET_ENCODING)));
 String line;
 return new JsonObject();
JsonElement jsonElement = GSON.fromJson(sb.toString(), JsonElement.class);
return jsonElement;

代码示例来源：origin: Impetus/Kundera

key = ((JsonElement) key).getAsString();
Reader reader = new InputStreamReader(content);
JsonObject jsonObject = gson.fromJson(reader, JsonObject.class);
if (jsonObject.get(((AbstractAttribute) entityMetadata.getIdAttribute()).getJPAColumnName()) == null)

代码示例来源：origin: Impetus/Kundera

/**
 * Gets the json from response.
 * 
 * @param response
 *            the response
 * @return the json from response
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
private JsonArray getJsonFromResponse(HttpResponse response) throws IOException
{
  InputStream content = response.getEntity().getContent();
  Reader reader = new InputStreamReader(content);
  JsonObject json = gson.fromJson(reader, JsonObject.class);
  JsonElement jsonElement = json.get("rows");
  return jsonElement == null ? null : jsonElement.getAsJsonArray();
}

代码示例来源：origin: chanjarster/weixin-java-tools

@Override
public List<WxCpTag> tagGet() throws WxErrorException {
 String url = "https://qyapi.weixin.qq.com/cgi-bin/tag/list";
 String responseContent = get(url, null);
 JsonElement tmpJsonElement = Streams.parse(new JsonReader(new StringReader(responseContent)));
 return WxCpGsonBuilder.INSTANCE.create()
   .fromJson(
     tmpJsonElement.getAsJsonObject().get("taglist"),
     new TypeToken<List<WxCpTag>>() {
     }.getType()
   );
}

代码示例来源：origin: iSoron/uhabits

@NonNull
public Command parse(@NonNull String json)
    .fromJson(json, ArchiveHabitsCommand.Record.class)
    .toCommand(habitList);
    .fromJson(json, ChangeHabitColorCommand.Record.class)
    .toCommand(habitList);
    .fromJson(json, CreateHabitCommand.Record.class)
    .toCommand(modelFactory, habitList);
    .fromJson(json, CreateRepetitionCommand.Record.class)
    .toCommand(habitList);
    .fromJson(json, DeleteHabitsCommand.Record.class)
    .toCommand(habitList);
    .fromJson(json, EditHabitCommand.Record.class)
    .toCommand(modelFactory, habitList);
    .fromJson(json, ToggleRepetitionCommand.Record.class)
    .toCommand(habitList);
    .fromJson(json, UnarchiveHabitsCommand.Record.class)
    .toCommand(habitList);

代码示例来源：origin: chanjarster/weixin-java-tools

@Override
public List<WxMpUserSummary> getUserSummary(Date beginDate, Date endDate) throws WxErrorException {
 String url = "https://api.weixin.qq.com/datacube/getusersummary";
 JsonObject param = new JsonObject();
 param.addProperty("begin_date", SIMPLE_DATE_FORMAT.format(beginDate));
 param.addProperty("end_date", SIMPLE_DATE_FORMAT.format(endDate));
 String responseContent = post(url, param.toString());
 JsonElement tmpJsonElement = Streams.parse(new JsonReader(new StringReader(responseContent)));
 return WxMpGsonBuilder.INSTANCE.create().fromJson(tmpJsonElement.getAsJsonObject().get("list"),
   new TypeToken<List<WxMpUserSummary>>() {
   }.getType());
}

代码示例来源：origin: gocd/gocd

private Map<String, Object> getMetadataFromFile(String artifactId) throws IOException {
  final String fileToString = FileUtils.readFileToString(metadataFileDest, StandardCharsets.UTF_8);
  LOGGER.debug(format("Reading metadata from file %s.", metadataFileDest.getAbsolutePath()));
  final Type type = new TypeToken<Map<String, Object>>() {
  }.getType();
  final Map<String, Map> allArtifactsPerPlugin = new GsonBuilder().create().fromJson(fileToString, type);
  return allArtifactsPerPlugin.get(artifactId);
}

代码示例来源：origin: aa112901/remusic

public static MusicDetailInfo getInfo(final String id) {
  MusicDetailInfo info = null;
  try {
    JsonObject jsonObject = HttpUtil.getResposeJsonObject(BMA.Song.songBaseInfo(id).trim()).get("result")
        .getAsJsonObject().get("items").getAsJsonArray().get(0).getAsJsonObject();
    info = MainApplication.gsonInstance().fromJson(jsonObject, MusicDetailInfo.class);
  } catch (Exception e) {
    e.printStackTrace();
  }
  return info;
}

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