【发布时间】：2014-05-08 15:14:45
【问题描述】：
有没有类似的属性：
JsonGenerator.Feature.QUOTE_FIELD_NAMES
或
JsonGenerator.Feature.ALLOW_UNQUOTED_FIELD_NAMES
等价于：
org.eclipse.persistence.jaxb.MarshallerProperties
我的问题是，我正在尝试通过这种方法使用 Jackson 获取 JSON 输出：
private static final ObjectMapper om = new ObjectMapper();
static {
om.configure(JsonGenerator.Feature.QUOTE_FIELD_NAMES, false);
om.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
om.configure(SerializationConfig.Feature.WRITE_DATES_AS_TIMESTAMPS, true);
om.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
om.getSerializationConfig().setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL);
}
try{
String exp = om.writeValueAsString(customer);
exp = "CREATE (customerNode"+customer.hashCode()+":CUSTOMER " + exp + " )";
}catch (Exception ex){}
最后，我得到了这个异常：
org.codehaus.jackson.map.JsonMappingException: Conflicting getter definitions for property "rootParentDescriptor": org.eclipse.persistence.descriptors.InheritancePolicy#getRootParentDescriptor(0 params) vs org.eclipse.persistence.descriptors.InheritancePolicy#isRootParentDescriptor(0 params) (through reference chain: blog.objectgraphs.dynamic.Customer["propertiesMap"]->java.util.HashMap["shippingAddress"]->org.eclipse.persistence.internal.dynamic.PropertyWrapper["value"]->blog.objectgraphs.dynamic.Address["type"]->org.eclipse.persistence.internal.dynamic.DynamicTypeImpl["descriptor"]->org.eclipse.persistence.oxm.XMLDescriptor["inheritancePolicy"])
at org.codehaus.jackson.map.ser.StdSerializerProvider._createAndCacheUntypedSerializer(StdSerializerProvider.java:740)
at org.codehaus.jackson.map.ser.StdSerializerProvider.findValueSerializer(StdSerializerProvider.java:344)
at org.codehaus.jackson.map.ser.impl.PropertySerializerMap.findAndAddSerializer(PropertySerializerMap.java:39)
at org.codehaus.jackson.map.ser.BeanPropertyWriter._findAndAddDynamic(BeanPropertyWriter.java:463)
at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:441)
at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
at org.codehaus.jackson.map.ser.std.MapSerializer.serializeFields(MapSerializer.java:262)
at org.codehaus.jackson.map.ser.std.MapSerializer.serialize(MapSerializer.java:186)
at org.codehaus.jackson.map.ser.std.MapSerializer.serialize(MapSerializer.java:23)
at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
at org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:610)
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.writeValueAsString(ObjectMapper.java:2097)
at blog.objectgraphs.dynamic.DemoRuntime.main(DemoRuntime.java:86)
Caused by: java.lang.IllegalArgumentException: Conflicting getter definitions for property "rootParentDescriptor": org.eclipse.persistence.descriptors.InheritancePolicy#getRootParentDescriptor(0 params) vs org.eclipse.persistence.descriptors.InheritancePolicy#isRootParentDescriptor(0 params)
at org.codehaus.jackson.map.introspect.POJOPropertyBuilder.getGetter(POJOPropertyBuilder.java:167)
at org.codehaus.jackson.map.introspect.POJOPropertyBuilder.getAccessor(POJOPropertyBuilder.java:116)
at org.codehaus.jackson.map.ser.BeanSerializerFactory.removeIgnorableTypes(BeanSerializerFactory.java:705)
at org.codehaus.jackson.map.ser.BeanSerializerFactory.findBeanProperties(BeanSerializerFactory.java:562)
at org.codehaus.jackson.map.ser.BeanSerializerFactory.constructBeanSerializer(BeanSerializerFactory.java:434)
at org.codehaus.jackson.map.ser.BeanSerializerFactory.findBeanSerializer(BeanSerializerFactory.java:347)
at org.codehaus.jackson.map.ser.BeanSerializerFactory.createSerializer(BeanSerializerFactory.java:291)
at org.codehaus.jackson.map.ser.StdSerializerProvider._createUntypedSerializer(StdSerializerProvider.java:782)
at org.codehaus.jackson.map.ser.StdSerializerProvider._createAndCacheUntypedSerializer(StdSerializerProvider.java:735)
... 26 more
【问题讨论】：
-
你的源“JSON”是什么（如果我们可以这样称呼它），你试图序列化的类的代码是什么？
-
@fge，对于特定情况，它不是显式类，该类是由库从 XML 源自动生成的，如：blog.objectgraphs.dynamic.Customer，您可以看到：@ 987654321@了解所有先前流程的详细信息
标签： java json jaxb eclipselink