下面的解决方案适用于以下堆栈(即...这是我用来测试它的设置)
Jersey 2.12,Jackson 2.4.x
自从今天我进行了许多谷歌搜索以来,我正在添加我的消息和我想出的解决方案,因为它对我来说非常相关... 这是一个繁琐的解决方案,我认为这是一个更加繁琐的问题。
确保您的Maven配置包含jackson-jaxrs-json-provider依赖项:
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.4.1</version>
</dependency>
2. 确保您的Maven配置中不包含jersey-media-json-jackson
依赖项:
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
</dependency>
3. 创建一个@Provider
组件,继承com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider
,如下所示:
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Provider;
@Provider
@Produces(MediaType.APPLICATION_JSON)
public class CustomJsonProvider extends JacksonJaxbJsonProvider {
private static ObjectMapper mapper = new ObjectMapper();
static {
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
mapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
mapper.enable(SerializationFeature.INDENT_OUTPUT);
}
public CustomJsonProvider() {
super();
setMapper(mapper);
}
}
正如您所看到的,这也是我们定义 com.fasterxml.jackson.databind.ObjectMapper
的自定义实例的位置。
4. 通过 MarshallingFeature
扩展 javax.ws.rs.core.Feature
,如下所示:
import javax.ws.rs.core.Feature;
import javax.ws.rs.core.FeatureContext;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
public class MarshallingFeature implements Feature {
@Override
public boolean configure(FeatureContext context) {
context.register(CustomJsonProvider.class, MessageBodyReader.class, MessageBodyWriter.class);
return true;
}
}
5. 您需要这样注册此自定义提供程序,前提是您通过org.glassfish.jersey.server.ResourceConfig
配置您的应用程序,如下所示:
import org.glassfish.jersey.server.ResourceConfig;
...
public class MyApplication extends ResourceConfig {
public MyApplication() {
...
register(MarshallingFeature.class);
...
}
}
其他注意事项和观察结果:
- 此解决方案适用于您是否使用
javax.ws.rs.core.Response
来包装控制器的响应。
- 请确保您仔细考虑(复制/粘贴)以下代码片段,因为唯一的“非强制性”部分是关于
com.fasterxml.jackson.databind.ObjectMapper
的自定义配置。
@jcreason
对不起 @jcreason,这个我没跟进,希望你还感兴趣。 我看了去年的代码,提供了一个自定义映射器来解决问题。
问题在于,在功能初始化期间,任何自定义对象映射器都会被某段代码禁用
org.glassfish.jersey.jackson.JacksonFeature:77
(jersey-media-json-jackson-2.12.jar)
// Disable other JSON providers.
context.property(PropertiesHelper.getPropertyNameForRuntime(InternalProperties.JSON_FEATURE, config.getRuntimeType()), JSON_FEATURE)
但是这个特性只能被这个组件注册
org.glassfish.jersey.jackson.internal.JacksonAutoDiscoverable
if (!context.getConfiguration().isRegistered(JacksonFeature.class)) {
context.register(JacksonFeature.class);
}
因此,我的做法是注册自己的特性,该特性注册了自己的对象映射器提供程序,并设置了旅行线路,停止org.glassfish.jersey.jackson.JacksonFeature的注册并覆盖我的对象映射器...
import com.fasterxml.jackson.jaxrs.base.JsonMappingExceptionMapper;
import com.fasterxml.jackson.jaxrs.base.JsonParseExceptionMapper;
import org.glassfish.jersey.internal.InternalProperties;
import org.glassfish.jersey.internal.util.PropertiesHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.ws.rs.core.Configuration;
import javax.ws.rs.core.Feature;
import javax.ws.rs.core.FeatureContext;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
public class MarshallingFeature implements Feature {
private final static String JSON_FEATURE = MarshallingFeature.class.getSimpleName();
@Override
public boolean configure(FeatureContext context) {
context.register(JsonParseExceptionMapper.class);
context.register(JsonMappingExceptionMapper.class);
context.register(JacksonJsonProviderAtRest.class, MessageBodyReader.class, MessageBodyWriter.class);
final Configuration config = context.getConfiguration();
context.property(
PropertiesHelper.getPropertyNameForRuntime(InternalProperties.JSON_FEATURE,
config.getRuntimeType()), JSON_FEATURE);
return true;
}
}
这里是自定义对象映射提供程序...
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Provider;
@Provider
@Produces(MediaType.APPLICATION_JSON)
public class JacksonJsonProviderAtRest extends JacksonJaxbJsonProvider {
private static ObjectMapper objectMapperAtRest = new ObjectMapper();
static {
objectMapperAtRest.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
objectMapperAtRest.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
objectMapperAtRest.configure(SerializationFeature.INDENT_OUTPUT, true);
objectMapperAtRest.setSerializationInclusion(JsonInclude.Include.ALWAYS);
}
public JacksonJsonProviderAtRest() {
super();
setMapper(objectMapperAtRest);
}
}
ObjectMapperResolver
。我使用rc.register(ObjectMapperResolver.class);
进行了注册,但是没有起作用。 - svenwltr