我使用此链接中的以下代码为我的一个数据模型类(JSON到JAXB模型的转换)添加自定义反序列化程序。
我想使用com。fasterxml。杰克逊。jaxrs。json。JacksonJaxbJsonProvider,用于其他数据模型的JSON序列化/反序列化。
JacksonJaxbJsonProvider的默认实现非常适合我的JAXB模型,将超类作为抽象类。但是,一旦我提供了自己的自定义ObjectMapper(如下所示),就不会使用默认的JacksonJaxbJsonProvider实现。i、 e自定义ObjectMapper没有正确转换为我的抽象类声明的JAXB注释和字段,因为它找不到在抽象类中声明的字段。
因此,我想根据所讨论的JAXB模型,同时使用自定义ObjectMapper和默认的JacksonJaxbJsonProvider实现。
40 package org.glassfish.jersey.examples.jackson;
41
42 import javax.ws.rs.ext.ContextResolver;
43 import javax.ws.rs.ext.Provider;
44
45 import com.fasterxml.jackson.databind.AnnotationIntrospector;
46 import com.fasterxml.jackson.databind.DeserializationFeature;
47 import com.fasterxml.jackson.databind.ObjectMapper;
48 import com.fasterxml.jackson.databind.SerializationFeature;
49 import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector;
50 import com.fasterxml.jackson.databind.type.TypeFactory;
51 import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
52
53 /**
54 * TODO javadoc.
55 *
56 * @author Jakub Podlesak (jakub.podlesak at oracle.com)
57 */
58 @Provider
59 public class MyObjectMapperProvider implements ContextResolver<ObjectMapper> {
60
61 final ObjectMapper defaultObjectMapper;
62 final ObjectMapper combinedObjectMapper;
63
64 public MyObjectMapperProvider() {
65 defaultObjectMapper = createDefaultMapper();
66 combinedObjectMapper = createCombinedObjectMapper();
67 }
68
69 @Override
70 public ObjectMapper getContext(final Class<?> type) {
71
72 if (type == CombinedAnnotationBean.class) {
73 return combinedObjectMapper;
74 } else {
75 return defaultObjectMapper;
76 }
77 }
78
79 private static ObjectMapper createCombinedObjectMapper() {
80 return new ObjectMapper()
81 .configure(SerializationFeature.WRAP_ROOT_VALUE, true)
82 .configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true)
83 .setAnnotationIntrospector(createJaxbJacksonAnnotationIntrospector());
84 }
85
86 private static ObjectMapper createDefaultMapper() {
87 final ObjectMapper result = new ObjectMapper();
88 result.enable(SerializationFeature.INDENT_OUTPUT);
89
90 return result;
91 }
92
93 private static AnnotationIntrospector createJaxbJacksonAnnotationIntrospector() {
94
95 final AnnotationIntrospector jaxbIntrospector = new JaxbAnnotationIntrospector(TypeFactory.defaultInstance());
96 final AnnotationIntrospector jacksonIntrospector = new JacksonAnnotationIntrospector();
97
98 return AnnotationIntrospector.pair(jacksonIntrospector, jaxbIntrospector);
99 }
100 }
这个电话
.setAnnotationIntrospector(createJaxbJacksonAnnotationIntrospector());
是什么增加了JAXB对组合对象映射器的支持。因此,如果您希望JAXB支持defaultObjectMapper,只需添加相同的调用。
final ObjectMapper result = new ObjectMapper();
result.setAnnotationIntrospector(createJaxbJacksonAnnotationIntrospector());