在我的java项目中有一个gson反序列化函数会导致以下错误。java.lang.NumberFormatException:对于输入字符串:“2017-01-28 13:28:20”
java.lang.NumberFormatException: For input string: "2017-01-28 13:28:20"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Long.parseLong(Long.java:589)
at java.lang.Long.parseLong(Long.java:631)
at com.google.gson.JsonPrimitive.getAsLong(JsonPrimitive.java:238)
at com.example.myproject.controller.MyController$1.deserialize(MyController.java:222)
at com.example.myproject.controller.MyController$1.deserialize(MyController.java:1)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
at com.google.gson.internal.bind.TypeAdapters$22$1.read(TypeAdapters.java:526)
at com.google.gson.internal.bind.TypeAdapters$22$1.read(TypeAdapters.java:524)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
at com.google.gson.Gson.fromJson(Gson.java:803)
at com.google.gson.Gson.fromJson(Gson.java:768)
at com.google.gson.Gson.fromJson(Gson.java:717)
at com.google.gson.Gson.fromJson(Gson.java:689)
我得到这个错误,当我反序列化下面的json字符串。
jsonString = {"repList":[{"createdOn":"2017-01-28 13:28:20","date":"2016-11-17 00:00:00","description":"","id":45,"userId":10}],"subList":[{"attachmentCount":0,"dateOn":"2017-01-28 13:28:20","id":86,"screenId":1,"sync":"1","repId":45,"userId":10}]}
下面是我的功能,我已经完成了gson反序列化。
SimpleDateFormat dtf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.ENGLISH);
GsonBuilder builder = new GsonBuilder();
builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
@Override
public Date deserialize(JsonElement json, Type type, JsonDeserializationContext deserializationContext) throws JsonParseException {
String frStr = dtf.format(new Date(json.getAsJsonPrimitive().getAsLong()));
dtf.setTimeZone(TimeZone.getDefault());
Date retDate =null;
try {
retDate = dtf.parse(frStr);
} catch (ParseException e) {
e.printStackTrace();
}
return retDate;
}
});
gson = builder.create();
MainAccounts mainAcc = gson.fromJson(jsonString, MainAccounts.class);
后来我发现是个例外是当我转换JSON原语,只要下面
json.getAsJsonPrimitive().getAsLong()
的反序列化method.How我能解决这个里面呢?请大家帮帮我。
ok.its正在工作。上面的json字符串带有日期值对应于迪拜时区,现在我需要将其转换为服务器时区(即在印度),以便日期值更改为印度时间。如何随格式一起执行此操作? – KJEjava48
@ KJEjava48解析时最重要的是输入时区,因为java.util.Date是时区无关的(它实际上是UTC中的时间戳),请检查[this](http://stackoverflow.com/questions/) 1516213/is-java-util-date-using-timezone)了解更多详细信息。另请参阅http://stackoverflow.com/questions/7670355/convert-date-time-for-given-timezone-java –
AFAIR,'SimpleDateFormat'不是线程安全的。 –