jackSon序列化枚举为字节数组抛空指针异常

[程序源自程序猿]

最近在使用jackson的时候遇到这样一个问题，jackson版本1.9.10

		ObjectMapper mapper = new ObjectMapper(new SmileFactory());
		mapper.setVisibility(JsonMethod.FIELD, Visibility.ANY);
		mapper.configure(SerializationConfig.Feature.USE_ANNOTATIONS, false);
		
		mapper.setAnnotationIntrospector(new NopAnnotationIntrospector());

                System.out.println(mapper.writeValueAsBytes(ViewTime.FOREVER));

调用writeValueAsBytes此方法将枚举转成字节的时候抛空指针异常，下面是异常信息
org.codehaus.jackson.map.JsonMappingException: [no message for java.lang.NullPointerException]
at org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:625)
at org.codehaus.jackson.map.ser.StdSerializerProvider.serializeValue(StdSerializerProvider.java:256)
at org.codehaus.jackson.map.ObjectMapper._configAndWriteValue(ObjectMapper.java:2575)
at org.codehaus.jackson.map.ObjectMapper.writeValueAsBytes(ObjectMapper.java:2114)
at com.myproduct.mobileinternet.cmsinterface.pojo.Configure.main(Configure.java:61)
Caused by: java.lang.NullPointerException
at org.codehaus.jackson.smile.SmileGenerator.writeString(SmileGenerator.java:996)
at org.codehaus.jackson.map.ser.std.EnumSerializer.serialize(EnumSerializer.java:59)
at org.codehaus.jackson.map.ser.std.EnumSerializer.serialize(EnumSerializer.java:24)
at org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:610)
... 4 more
只要注掉
mapper.configure(SerializationConfig.Feature.USE_ANNOTATIONS, false);

mapper.setAnnotationIntrospector(new NopAnnotationIntrospector());
这两行就不会出现此问题，求大神指点这是什么情况。

public enum ViewTime
{
	FOREVER(-1), SEVEN_DAY(0), ONE_MONTH(1),TWO_MONTH(2),THREE_MONTH(3),SIX_MONTH(4),ONE_YEAR(5);
	
	private int value;

	private ViewTime(int value)
	{
		this.value = value;
	}

	public int getValue()
	{
		return value;
	}
	
	public static ViewTime fromValue(int period)
	{
		switch(period)
		{
		case -1:
			return FOREVER;
		case 0:
			return SEVEN_DAY;
		case 1:
			return ONE_MONTH;
		case 2:
			return TWO_MONTH;
		case 3:
			return THREE_MONTH;
		case 4:
			return SIX_MONTH;
		case 5:
			return ONE_YEAR;
		}
		return null;
	}
	@Override
	public String toString()
	{
		return String.valueOf(value);
	}
}

[程序源自程序猿]

沉的不见影了...顶上去

[ronghua_liu]

jason解析配置问题，帮顶

[程序源自程序猿]

能否说清楚一点？谢谢[Quote=引用 2 楼 的回复:]

jason解析配置问题，帮顶
[/Quote]

[程序源自程序猿]

已解决..

[xiaofengxiaoling]

怎么解决的楼主。