使用javaconfig,我们也不需要创建HibernateAwareObjectMapper
,只需将Hibernate4Module
添加到Spring已经拥有的默认MappingJackson2HttpMessageConverter
并将其添加到应用程序的HttpMessageConverters
中,因此我们需要:
从WebMvcConfigurerAdapter
扩展spring config
类,并重写configureMessageConverters
方法。
在该方法中添加MappingJackson2HttpMessageConverter
与Hibernate4Module
在previus
方法进行注册。
我们的配置类应如下所示:
@Configuration
@EnableWebMvc
public class MyConfigClass extends WebMvcConfigurerAdapter{
//More configuration....
/* Here we register the Hibernate4Module into an ObjectMapper, then set this custom-configured ObjectMapper
* to the MessageConverter and return it to be added to the HttpMessageConverters of our application*/
public MappingJackson2HttpMessageConverter jacksonMessageConverter(){
MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
ObjectMapper mapper = new ObjectMapper();
//Registering Hibernate4Module to support lazy objects
mapper.registerModule(new Hibernate4Module());
messageConverter.setObjectMapper(mapper);
return messageConverter;
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
//Here we add our custom-configured HttpMessageConverter
converters.add(jacksonMessageConverter());
super.configureMessageConverters(converters);
}
//More configuration....
}
如果你具有xml配置,则也不需要创建自己的MappingJackson2HttpMessageConverter
,但是你需要创建出现在教程(HibernateAwareObjectMapper
)中的个性化映射器,因此xml配置应如下所示:
<mvc:message-converters>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="objectMapper">
<bean class="com.pastelstudios.json.HibernateAwareObjectMapper" />
</property>
</bean>
</mvc:message-converters>