问GSON: Java内存不足错误堆空间
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提问于 2017-10-23 18:53:18

回答 1查看 5.5K关注 0票数 1

我试着用下面的代码把一个大对象转换成json格式的字符串，我得到了内存不足，我们使用的堆大小是1 1GB exception.However。

gson.toJson(this);

我们怎样才能在不增加堆大小的情况下使用gson streaming API(https://sites.google.com/site/gson/streaming)来消除这个错误呢？

 Caused by: java.lang.OutOfMemoryError: Java heap space
        at java.util.Arrays.copyOf(Arrays.java:2367)
        at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:130)
        at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:114)
        at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:415)
        at java.lang.StringBuffer.append(StringBuffer.java:237)
        at java.io.StringWriter.write(StringWriter.java:112)
        at com.google.gson.stream.JsonWriter.string(JsonWriter.java:576)
        at com.google.gson.stream.JsonWriter.writeDeferredName(JsonWriter.java:402)
        at com.google.gson.stream.JsonWriter.value(JsonWriter.java:417)
        at com.google.gson.internal.bind.TypeAdapters$16.write(TypeAdapters.java:426)
        at com.google.gson.internal.bind.TypeAdapters$16.write(TypeAdapters.java:410)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
        at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:208)
        at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:145)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:112)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:239)
        at com.google.gson.Gson.toJson(Gson.java:661)
        at com.google.gson.Gson.toJson(Gson.java:640)
        at com.google.gson.Gson.toJson(Gson.java:595)
        at com.google.gson.Gson.toJson(Gson.java:575)

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