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我有一個控制器，其響應是camelCase json值。現在我們用新版本重新編寫代碼，並且所需的響應位於snake_case中。如何根據條件應用彈簧消息轉換器？
我添加了一個消息轉換器和修改的對象映射器設置setPropertyNamingStrategy(PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES);
public class ResponseJSONConverter extends MappingJackson2HttpMessageConverter {
@Autowired
public ResponseJSONConverter(ObjectMapper objectMapper) {
setObjectMapper(objectMapper);
}
}
我已經註冊該轉換器的彈簧和其工作按預期方式。現在我想讓我的舊端點以camelCase的形式返回，以便爲我的客戶和使用snake_case的新端點提供向後兼容性。
我試圖有一個更多的消息轉換器與簡單的對象映射器沒有設置camelCase到Snake案例屬性和春季註冊。根據彈簧配置中聲明的順序，只有一個消息轉換器被應用。
有什麼辦法可以做到這一點？根據條件加載消息轉換器？
編輯
加了我的Spring配置文件
<beans xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<bean id="moneySerializer" class="api.serialize.MoneySerializer"/>
<bean id="moneyDeserializer" class="api.serialize.MoneyDeserializer"/>
<bean id="serializationModule" class="api.serialize.SerializationModule">
<constructor-arg index="0" ref="moneySerializer"/>
<constructor-arg index="1" ref="moneyDeserializer"/>
</bean>
<bean id="customObjectMapper" class="api.serialize.CustomObjectMapper" primary="true">
<constructor-arg ref="serializationModule"/>
</bean>
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="api.serialize.ResponseJSONConverterCamelCaseToSnakeCase" >
<constructor-arg ref="customObjectMapper"/>
</bean>
<bean class="api.serialize.ResponseJSONConverter">
<constructor-arg ref="objectMapper"/>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<bean id="objectMapper" class="com.fasterxml.jackson.databind.ObjectMapper"/>
</beans>
EDIT 2.0
我servlet.xml中
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="com.tgt.promotions.api.serialize.ServiceJSONConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
CustomMessageConverter
public class ServiceJSONConverter extends MappingJackson2HttpMessageConverter {
@Autowired
public ServiceJSONConverter(SnakeCaseObjectMapper snakeCaseObjectMapper) {
setObjectMapper(snakeCaseObjectMapper);
}
}
自定義對象映射
@Component
public class SnakeCaseObjectMapper extends ObjectMapper {
@Autowired
public SnakeCaseObjectMapper(PropertyNamingStrategy propertyNamingStrategy) {
setSerializationInclusion(JsonInclude.Include.NON_NULL);
setPropertyNamingStrategy(propertyNamingStrategy);
}
}
自定義屬性命名反而有2個不同的對象映射器的戰略
@Component
public class CustomPropertyNamingStrategy extends PropertyNamingStrategy {
@Autowired
private HttpServletRequest request;
private final PropertyNamingStrategy legacyStrategy = PropertyNamingStrategy.LOWER_CASE;
private final PropertyNamingStrategy defaultStrategy = PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES;
@Override
public String nameForConstructorParameter(MapperConfig<?> config, AnnotatedParameter ctorParam, String defaultName) {
return getStrategy().nameForConstructorParameter(config, ctorParam, defaultName);
}
@Override
public String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) {
return getStrategy().nameForField(config, field, defaultName);
}
@Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
return getStrategy().nameForGetterMethod(config, method, defaultName);
}
@Override
public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
return getStrategy().nameForSetterMethod(config, method, defaultName);
}
private PropertyNamingStrategy getStrategy() {
if (isLegacyEndpoint(request)) {
return legacyStrategy;
} else {
return defaultStrategy;
}
}
private boolean isLegacyEndpoint(HttpServletRequest request) {
return request != null && request.getRequestURL() != null && !request.getRequestURL().toString().contains("/v3");
}
}
請問您可以添加您的spring xml配置或更多支持代碼。 –