CODEWITHSUNDEEP
springspring-bootjackson-dataformat-xml
Vivek Misra
Vivek Misra

Reputation: 175

Spring 5 -jackson-dataformat-xml forces @ResponseBody with XML

I have to work on a legacy spring 5 [not boot] project and I am facing similar problem like this jackson-dataformat-xml turns @ResponseBody to XML So I started using XMLMapper - input is application/text [which is xml string] and out put should json in controllers . But I see as soon as I add dependency

<dependency>
<artifactId>jackson-dataformat-xml</artifactId>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<version>2.10.2</version>
</dependency>

Response no longer seems to be JSON but xml I am not able to figure out what should be done. I need to use xmlmapper to avoid JAXB2 . Any sample configurations. [Java config will also be OK but not to use java 8 lambda functions as it is not used in this legacy [ because we have certain legacy dependencies like checkstyle not upgraded to java 8 in this project .] would help...Let me know.

I have below config currently but i think issue is with dependency . So some tweaking needs to be done in configuration:

@Configuration
public class HttpResponseConfig implements WebMvcConfigurer {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
        builder.indentOutput(true).dateFormat(new SimpleDateFormat("yyyy-MM-dd"));
        converters.add(new MappingJackson2HttpMessageConverter(builder.build()));
        converters.add(new MappingJackson2XmlHttpMessageConverter(builder.createXmlMapper(true).build()));

    }
}

Upvotes: 2

Views: 3644

Answers (3)

Vivek Misra
Vivek Misra

Reputation: 175

There were multiple places where I needed to fix . We are also using Apache HTTP Client to call backend services. Responses from those services also got broken [they started retuning xml]. Since it was a common piece of code, I modified "Accept" header with q=1 for json. http.setHeader("Accept","application/json;q=1, text/html;q=0.9, application/xhtml+xml;q=0.9, application/xml;q=0.8, */*;q=0.7");

Then came Spring controllers which had to be fixed. I had to configure message converters as well as contentnegotiations both


@Configuration
@EnableWebMvc
public class HttpResponseConfig implements WebMvcConfigurer {
    @Autowired
    ObjectMapperFactory objectMapperFactory;//custom

    @Bean
    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        converter.setObjectMapper(objectMapperFactory.getObjectMapper());
        return converter;
    }

    @Override
    public void extendMessageConverters(final List<HttpMessageConverter<?>> converters) {
        converters.add(0, new MappingJackson2HttpMessageConverter(mappingJackson2HttpMessageConverter().getObjectMapper()));

    }

    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer.defaultContentType(MediaType.APPLICATION_JSON_UTF8);
    }

}

Upvotes: 0

KevinB
KevinB

Reputation: 1202

Do you have the ACCEPT header set in the HTTP request? If spring is configured to return both types, then you should set the ACCEPT header to the desired type.

Upvotes: 0

KevinB
KevinB

Reputation: 1202

Have you tried specifing the response type?

@PostMapping(value = "/content", produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody

https://www.baeldung.com/spring-request-response-body

Upvotes: 0

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