JodaTime LocalDate / LocalTime不使用自定义JSON序列化程序类进行分析 [英] JodaTime LocalDate/LocalTime not Parsing with custom JSON Serializer classes
问题描述
我有一个名为 ReportEvent
的对象,它包含一个 LocalTime
以及一个 LocalDate
来自 JodaTime
API /框架。可以通过谷歌的 GSON
将 ReportEvent
写入 JSON
>转换API。然而,当反序列化 JodaTime部分
会导致问题。
Logcat错误报告:
10-16 13:23:01.812:E / AndroidRuntime(8884):致命例外:main
10-16 13:23:01.812:E / AndroidRuntime(8884):java.lang.RuntimeException:无法启动活动ComponentInfo {com.nanospark.cnc / com.nanospark.cnc.MainActivity}:java.lang.IllegalArgumentException:格式无效:{iChronology:{iBase :{iMinDa ...
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
10- 16 13:23:01.812:E / AndroidRuntime(8884):at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.app.ActivityThread.access $ 600(ActivityThread.java:141)
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.app.ActivityThread $ H.handleMessage(ActivityThread.java: 1256)
10-16 13:23:01.812:E / A ndroidRuntime(8884):在android.os.Handler.dispatchMessage(Handler.java:99)
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.os.Looper.loop(Looper .java:137)
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.app.ActivityThread.main(ActivityThread.java:5103)
10-16 13:23 :01.812:E / AndroidRuntime(8884):在java.lang.reflect.Method.invokeNative(本地方法)
10-16 13:23:01.812:E / AndroidRuntime(8884):at java.lang.reflect .Method.invoke(Method.java:525)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java: 737)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-16 13: 23:01.812:E / AndroidRuntime(8884):在dalvik.system.NativeStart.main(本地方法)
10-16 13:23:01.812:E / AndroidRuntime(8884):引起:java.lang。 IllegalArgumentException:格式无效:{iChronology:{iBase:{iM inDa ...
10-16 13:23:01.812:E / AndroidRuntime(8884):at org.joda.time.format.DateTimeFormatter.parseLocalDateTime(DateTimeFormatter.java:854)
10- 16 13:23:01.812:E / AndroidRuntime(8884):at org.joda.time.format.DateTimeFormatter.parseLocalDate(DateTimeFormatter.java:798)
10-16 13:23:01.812:E / AndroidRuntime 8884):at com.nanospark.cnc.LocalDateSerializer.deserialize(LocalDateSerializer.java:32)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.nanospark.cnc.LocalDateSerializer.deserialize (LocalDateSerializer.java:1)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
10- 16 13:23:01.812:E / AndroidRuntime(8884):在com.google.gson.internal.bind.ReflectiveTypeAdapterFactory $ 1.read(ReflectiveTypeAdapterFactory.java:95)
10-16 13:23:01.812:E / AndroidRuntime(8884):com.google.gson.internal.bind.ReflectiveTypeAdapterFactory $ Adapter.read(ReflectiveTypeAdapterFactory.java:18 3)
10-16 13:23:01.812:E / AndroidRuntime(8884):com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
10-16 13:23:01.812:E / AndroidRuntime(8884):com.google.gson.internal.bind.CollectionTypeAdapterFactory $ Adapter.read(CollectionTypeAdapterFactory.java:81)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.google.gson.internal.bind.CollectionTypeAdapterFactory $ Adapter.read(CollectionTypeAdapterFactory.java:60)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.google.gson.Gson.fromJson(Gson.java:805)
10-16 13:23:01.812:E / AndroidRuntime(8884):com.google.gson.Gson.fromJson(Gson.java :770)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com.google.gson.Gson.fromJson(Gson.java:719)
10-16 13:23 :01.812:E / AndroidRuntime(8884):at com.nanospark.cnc.GlobalData.retrieveGlobalDataFromStorage(GlobalData.java:118)
10-16 13:23:01.812:E / AndroidRuntime(8884):at com。 nanosp ark.cnc.MainActivity.onCreate(MainActivity.java:35)
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.app.Activity.performCreate(Activity.java:5133)
10-16 13:23:01.812:E / AndroidRuntime(8884):at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
10-16 13:23:01.812:E / AndroidRuntime (8884):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
10-16 13:23:01.812:E / AndroidRuntime(8884):... 11 more
相关代码段:
LocalTime Serializer / Deserializer。 p>
package com.nanospark.cnc;
import java.lang.reflect.Type;
import org.joda.time.LocalTime;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
公共类LocalTimeSerializer实现了JsonDeserializer< LocalTime>,JsonSerializer< LocalTime>
{
private static final DateTimeFormatter TIME_FORMAT = ISODateTimeFormat.timeNoMillis();
@Override
public LocalTime deserialize(final JsonElement je,final Type type,
final JsonDeserializationContext jdc)throws JsonParseException
{
final String dateAsString = je的ToString();
if(je.isJsonNull()|| dateAsString.length()== 0)
{
return null;
}
else
{
return TIME_FORMAT.parseLocalTime(dateAsString);
$ b @Override
public JsonElement serialize(final LocalTime src,final Type typeOfSrc,$ b $ final JsonSerializationContext context)
{
String retVal;
if(src == null)
{
retVal =;
}
else
{
retVal = TIME_FORMAT.print(src);
}
返回新的JsonPrimitive(retVal);
$ b}
LocalDate Serializer / Deserializer。 p>
public class LocalDateSerializer实现JsonSerializer< LocalDate>,JsonDeserializer< LocalDate>
{
private static final String PATTERN =yyyy-MM-dd;
final DateTimeFormatter fmt = DateTimeFormat.forPattern(PATTERN);
$ b @Override
public JsonElement serialize(LocalDate src,Type typeOfSrc,JsonSerializationContext context)
{
String retVal = fmt.print(src);
Log.v(我的LOCALDATE SERIALIZED,retVal);
返回新的JsonPrimitive(retVal);
$ b @Override
public LocalDate反序列化(JsonElement json,类型typeOfT,JsonDeserializationContext上下文)
抛出JsonParseException
{
Log.v(MY LOCALDATE DESERIALIZED,json.toString());
return fmt.parseLocalDate(json.toString());
}
}
问题在于你的代码是序列化数据。
在你原来的问题中,当你打算反序列化时, em>( retrieveGlobalDataFromStorage
):
最终GsonBuilder builder = new GsonBuilder )
.registerTypeAdapter(LocalDate.class,new LocalDateSerializer())
.registerTypeAdapter(LocalTime.class,new LocalTimeSerializer());
final Gson gson = builder.create();
但是当你要 serialize 时( storeGlobalData
)你只需要:
Gson gson = new Gson();
您应该在两个 位置注册类型适配器。我会将这些代码( I have an object called Logcat Error Report: Relevant sections of code: LocalTime Serializer/Deserializer. LocalDate Serializer/Deserializer.
The problem lies with the code you've got that's serializing the data. In your original question, you have this code when you're going to deserialize ( But when you're going to serialize ( You should be registering the type adapters in both places. I'd extract that code ( 这篇关于JodaTime LocalDate / LocalTime不使用自定义JSON序列化程序类进行分析的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋! Gson
初始化)提取到一个单独的方法,您可以从两个方法中调用该方法。 ReportEvent
which takes in a LocalTime
as well as a LocalDate
from the JodaTime
API/framework. This ReportEvent
is able to be written to JSON
via google's GSON
conversion API. However when deserializing the JodaTime partial
causes problems.10-16 13:23:01.812: E/AndroidRuntime(8884): FATAL EXCEPTION: main
10-16 13:23:01.812: E/AndroidRuntime(8884): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nanospark.cnc/com.nanospark.cnc.MainActivity}: java.lang.IllegalArgumentException: Invalid format: "{"iChronology":{"iBase":{"iMinDa..."
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.ActivityThread.access$600(ActivityThread.java:141)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.os.Handler.dispatchMessage(Handler.java:99)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.os.Looper.loop(Looper.java:137)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.ActivityThread.main(ActivityThread.java:5103)
10-16 13:23:01.812: E/AndroidRuntime(8884): at java.lang.reflect.Method.invokeNative(Native Method)
10-16 13:23:01.812: E/AndroidRuntime(8884): at java.lang.reflect.Method.invoke(Method.java:525)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-16 13:23:01.812: E/AndroidRuntime(8884): at dalvik.system.NativeStart.main(Native Method)
10-16 13:23:01.812: E/AndroidRuntime(8884): Caused by: java.lang.IllegalArgumentException: Invalid format: "{"iChronology":{"iBase":{"iMinDa..."
10-16 13:23:01.812: E/AndroidRuntime(8884): at org.joda.time.format.DateTimeFormatter.parseLocalDateTime(DateTimeFormatter.java:854)
10-16 13:23:01.812: E/AndroidRuntime(8884): at org.joda.time.format.DateTimeFormatter.parseLocalDate(DateTimeFormatter.java:798)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.nanospark.cnc.LocalDateSerializer.deserialize(LocalDateSerializer.java:32)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.nanospark.cnc.LocalDateSerializer.deserialize(LocalDateSerializer.java:1)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:95)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:183)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.Gson.fromJson(Gson.java:805)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.Gson.fromJson(Gson.java:770)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.google.gson.Gson.fromJson(Gson.java:719)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.nanospark.cnc.GlobalData.retrieveGlobalDataFromStorage(GlobalData.java:118)
10-16 13:23:01.812: E/AndroidRuntime(8884): at com.nanospark.cnc.MainActivity.onCreate(MainActivity.java:35)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.Activity.performCreate(Activity.java:5133)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
10-16 13:23:01.812: E/AndroidRuntime(8884): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
10-16 13:23:01.812: E/AndroidRuntime(8884): ... 11 more
package com.nanospark.cnc;
import java.lang.reflect.Type;
import org.joda.time.LocalTime;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
public class LocalTimeSerializer implements JsonDeserializer<LocalTime>, JsonSerializer<LocalTime>
{
private static final DateTimeFormatter TIME_FORMAT = ISODateTimeFormat.timeNoMillis();
@Override
public LocalTime deserialize(final JsonElement je, final Type type,
final JsonDeserializationContext jdc) throws JsonParseException
{
final String dateAsString = je.toString();
if (je.isJsonNull() || dateAsString.length() == 0)
{
return null;
}
else
{
return TIME_FORMAT.parseLocalTime(dateAsString);
}
}
@Override
public JsonElement serialize(final LocalTime src, final Type typeOfSrc,
final JsonSerializationContext context)
{
String retVal;
if (src == null)
{
retVal = "";
}
else
{
retVal = TIME_FORMAT.print(src);
}
return new JsonPrimitive(retVal);
}
}
public class LocalDateSerializer implements JsonSerializer<LocalDate>, JsonDeserializer<LocalDate>
{
private static final String PATTERN = "yyyy-MM-dd";
final DateTimeFormatter fmt = DateTimeFormat.forPattern(PATTERN);
@Override
public JsonElement serialize(LocalDate src, Type typeOfSrc, JsonSerializationContext context)
{
String retVal = fmt.print(src);
Log.v("MY LOCALDATE SERIALIZED", retVal);
return new JsonPrimitive(retVal);
}
@Override
public LocalDate deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws JsonParseException
{
Log.v("MY LOCALDATE DESERIALIZED",json.toString());
return fmt.parseLocalDate(json.toString());
}
}
retrieveGlobalDataFromStorage
):final GsonBuilder builder = new GsonBuilder()
.registerTypeAdapter(LocalDate.class, new LocalDateSerializer())
.registerTypeAdapter(LocalTime.class, new LocalTimeSerializer());
final Gson gson = builder.create();
storeGlobalData
) you just have:Gson gson = new Gson();
Gson
initialization) to a separate method which you can call from both your methods.