MacFly3181 :
Since SpringBoot 2.2.2, the custom pagination serializer with Jackson (2.10.1) doesn't work and isn't executed when serializing.
/**
* This class allows to specify configuration related to the Web MVC part.
*/
@Configuration
public class WebConfiguration implements WebMvcConfigurer {
private static final String JSON_DATA_PROPERTY = "data";
/**
* Allows to configure a {@link JsonSerializer} for pagination.
*
* @return an instance of {@link Module}.
*/
@SuppressWarnings("rawtypes")
@Bean
public Module springDataPageModule() {
return new SimpleModule().addSerializer(Page.class, new JsonSerializer<Page>() {
@Override
public void serialize(final Page page, final JsonGenerator jsonGenerator,
final SerializerProvider serializers) throws IOException {
jsonGenerator.writeStartObject();
jsonGenerator.writeObjectField(JSON_DATA_PROPERTY, page.getContent());
jsonGenerator.writeObjectFieldStart("paging");
jsonGenerator.writeNumberField("page", page.getNumber() + 1);
jsonGenerator.writeNumberField("totalPages", page.getTotalPages());
jsonGenerator.writeNumberField("totalElements", page.getTotalElements());
jsonGenerator.writeNumberField("perPage", page.getSize());
jsonGenerator.writeEndObject();
jsonGenerator.writeEndObject();
}
});
}
...
}
With SpringBoot 2.2.1, this custom pagination serializer is applied and works. Can you see this problem ?
MacFly3181 :
The behavior has changed since SpringBoot 2.2.2. You have to go through the registration of the module
/**
* This class allows to specify configuration related to the Web MVC part.
*/
@Configuration
public class WebConfiguration implements WebMvcConfigurer {
private static final String JSON_DATA_PROPERTY = "data";
/**
* Allows to configure a {@link JsonSerializer} for pagination.
*
* @return an instance of {@link Module}.
*/
private Module preparePageModule() {
return new SimpleModule().addSerializer(Page.class, new JsonSerializer<>() {
@Override
public void serialize(@SuppressWarnings("rawtypes") final Page page, final JsonGenerator jsonGenerator,
final SerializerProvider serializers) throws IOException {
jsonGenerator.writeStartObject();
jsonGenerator.writeObjectField(JSON_DATA_PROPERTY, page.getContent());
jsonGenerator.writeObjectFieldStart("paging");
jsonGenerator.writeNumberField("page", page.getNumber() + 1);
jsonGenerator.writeNumberField("totalPages", page.getTotalPages());
jsonGenerator.writeNumberField("totalElements", page.getTotalElements());
jsonGenerator.writeNumberField("perPage", page.getSize());
jsonGenerator.writeEndObject();
jsonGenerator.writeEndObject();
}
});
}
/**
* Allows to configure the Jackson object mapper.
*
* @param objectMapper
* an instance of {@link ObjectMapper}.
*/
@Autowired
public void configureJacksonObjectMapper(final ObjectMapper objectMapper) {
...
objectMapper.registerModule(preparePageModule());
}
...
}
`
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