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Jersey 2中的定制Jackson ObjectMapper，带Spring

spring jersey

Jersey 2中的定制Jackson ObjectMapper，带Spring,spring,jersey,jackson,jersey-2.0,Spring,Jersey,Jackson,Jersey 2.0,我在将Jersey从1.x迁移到2.x时遇到一些问题。我的应用程序使用Jersey提供RESTWeb服务，通过Jackson和Spring4以JSON格式提供数据，以处理依赖注入 在Jersey 1.x中，我曾将JsonDeserializer作为Spring管理的组件编写，因此我可以访问我的服务，以便在反序列化过程中从持久层加载我的域对象，但在2.x中，我在反序列化器中的服务注入工作时遇到问题。我所采用的方法受到了以下博客文章的启发： 这是我的pom.xml的依赖项部分： <depend

我在将Jersey从1.x迁移到2.x时遇到一些问题。我的应用程序使用Jersey提供RESTWeb服务，通过Jackson和Spring4以JSON格式提供数据，以处理依赖注入

在Jersey 1.x中，我曾将JsonDeserializer作为Spring管理的组件编写，因此我可以访问我的服务，以便在反序列化过程中从持久层加载我的域对象，但在2.x中，我在反序列化器中的服务注入工作时遇到问题。我所采用的方法受到了以下博客文章的启发：

这是我的pom.xml的依赖项部分：

<dependencies>
    <!-- Spring -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!-- Jersey -->
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>${jersey.version}</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.ext</groupId>
        <artifactId>jersey-spring3</artifactId>
        <version>${jersey.version}</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-multipart</artifactId>
        <version>${jersey.version}</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <version>${jersey.version}</version>
    </dependency>
    <!-- Commons Codec -->
    <dependency>
        <groupId>commons-codec</groupId>
        <artifactId>commons-codec</artifactId>
        <version>${commons-codec.version}</version>
    </dependency>

    <!-- cut -->

<dependencies>

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

    <module-name>myApp/module-name>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <context-param>
        <param-name>contextClass</param-name>
        <param-value>
            org.springframework.web.context.support.AnnotationConfigWebApplicationContext
        </param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>it.mgt.myApp.config.ApplicationConfig</param-value>
    </context-param>

    <servlet>
        <servlet-name>jersey-serlvet</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>it.mgt.myApp.config.JerseyConfig</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>jersey-serlvet</servlet-name>
        <url-pattern>/api/*</url-pattern>
    </servlet-mapping>

</web-app>
这是我的泽西资源配置类：

@Configuration
@ComponentScan({"it.mgt.myApp"})
@PropertySource("classpath:myApp.properties")
public class ApplicationConfig {

    // Cut

}

public class JerseyConfig extends ResourceConfig {

    public JerseyConfig() {
        packages("it.mgt.myApp");

        register(MultiPartFeature.class);

        register(RequestContextFilter.class);

        register(ObjectMapperContextResolver.class);
        register(JacksonFeature.class);

        register(CorsRequestFilter.class);
        register(SignatureProcessingFilter.class);
        register(AuthorizationFeature.class);
        register(CorsResponseFilter.class);
        register(new UserBinder());
    }
}

@Component
@Provider
public class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> {

    @Autowired
    private SpringObjectMapper objectMapper;

    public ObjectMapperContextResolver() {
        super();
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return objectMapper;
    }

}

@Component
public class SpringObjectMapper extends ObjectMapper {

    private static final long serialVersionUID = 1413033425692174337L;

    @Autowired
    ApplicationContext applicationContext;

    public SpringObjectMapper() {
        this.setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL);
        this.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, true);
    }

    @Override
    @Autowired
    public void setHandlerInstantiator(HandlerInstantiator hi) {
        super.setHandlerInstantiator(hi);
    }

}

@Component
public class SpringBeanHandlerInstantiator extends HandlerInstantiator {

    private ApplicationContext applicationContext;

    @Autowired
    public SpringBeanHandlerInstantiator(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    @Override
    public JsonDeserializer<?> deserializerInstance(DeserializationConfig dc, Annotated antd, Class<? extends JsonDeserializer<?>> type) {
        try {
            return (JsonDeserializer<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public KeyDeserializer keyDeserializerInstance(DeserializationConfig dc, Annotated antd, Class<? extends KeyDeserializer> type) {
        try {
            return (KeyDeserializer) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public JsonSerializer<?> serializerInstance(SerializationConfig sc, Annotated antd, Class<? extends JsonSerializer<?>> type) {
        try {
            return (JsonSerializer<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public TypeResolverBuilder<?> typeResolverBuilderInstance(MapperConfig<?> mc, Annotated antd, Class<? extends TypeResolverBuilder<?>> type) {
        try {
            return (TypeResolverBuilder<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public TypeIdResolver typeIdResolverInstance(MapperConfig<?> mc, Annotated antd, Class<? extends TypeIdResolver> type) {
        try {
            return (TypeIdResolver) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

}
这是我的ObjectMapperContextResolver类：

@Configuration
@ComponentScan({"it.mgt.myApp"})
@PropertySource("classpath:myApp.properties")
public class ApplicationConfig {

    // Cut

}

public class JerseyConfig extends ResourceConfig {

    public JerseyConfig() {
        packages("it.mgt.myApp");

        register(MultiPartFeature.class);

        register(RequestContextFilter.class);

        register(ObjectMapperContextResolver.class);
        register(JacksonFeature.class);

        register(CorsRequestFilter.class);
        register(SignatureProcessingFilter.class);
        register(AuthorizationFeature.class);
        register(CorsResponseFilter.class);
        register(new UserBinder());
    }
}

@Component
@Provider
public class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> {

    @Autowired
    private SpringObjectMapper objectMapper;

    public ObjectMapperContextResolver() {
        super();
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return objectMapper;
    }

}

@Component
public class SpringObjectMapper extends ObjectMapper {

    private static final long serialVersionUID = 1413033425692174337L;

    @Autowired
    ApplicationContext applicationContext;

    public SpringObjectMapper() {
        this.setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL);
        this.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, true);
    }

    @Override
    @Autowired
    public void setHandlerInstantiator(HandlerInstantiator hi) {
        super.setHandlerInstantiator(hi);
    }

}

@Component
public class SpringBeanHandlerInstantiator extends HandlerInstantiator {

    private ApplicationContext applicationContext;

    @Autowired
    public SpringBeanHandlerInstantiator(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    @Override
    public JsonDeserializer<?> deserializerInstance(DeserializationConfig dc, Annotated antd, Class<? extends JsonDeserializer<?>> type) {
        try {
            return (JsonDeserializer<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public KeyDeserializer keyDeserializerInstance(DeserializationConfig dc, Annotated antd, Class<? extends KeyDeserializer> type) {
        try {
            return (KeyDeserializer) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public JsonSerializer<?> serializerInstance(SerializationConfig sc, Annotated antd, Class<? extends JsonSerializer<?>> type) {
        try {
            return (JsonSerializer<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public TypeResolverBuilder<?> typeResolverBuilderInstance(MapperConfig<?> mc, Annotated antd, Class<? extends TypeResolverBuilder<?>> type) {
        try {
            return (TypeResolverBuilder<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public TypeIdResolver typeIdResolverInstance(MapperConfig<?> mc, Annotated antd, Class<? extends TypeIdResolver> type) {
        try {
            return (TypeIdResolver) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

}
这是我的SpringBeanHandlerInstantiator课程：

@Configuration
@ComponentScan({"it.mgt.myApp"})
@PropertySource("classpath:myApp.properties")
public class ApplicationConfig {

    // Cut

}

public class JerseyConfig extends ResourceConfig {

    public JerseyConfig() {
        packages("it.mgt.myApp");

        register(MultiPartFeature.class);

        register(RequestContextFilter.class);

        register(ObjectMapperContextResolver.class);
        register(JacksonFeature.class);

        register(CorsRequestFilter.class);
        register(SignatureProcessingFilter.class);
        register(AuthorizationFeature.class);
        register(CorsResponseFilter.class);
        register(new UserBinder());
    }
}

@Component
@Provider
public class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> {

    @Autowired
    private SpringObjectMapper objectMapper;

    public ObjectMapperContextResolver() {
        super();
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return objectMapper;
    }

}

@Component
public class SpringObjectMapper extends ObjectMapper {

    private static final long serialVersionUID = 1413033425692174337L;

    @Autowired
    ApplicationContext applicationContext;

    public SpringObjectMapper() {
        this.setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL);
        this.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, true);
    }

    @Override
    @Autowired
    public void setHandlerInstantiator(HandlerInstantiator hi) {
        super.setHandlerInstantiator(hi);
    }

}

@Component
public class SpringBeanHandlerInstantiator extends HandlerInstantiator {

    private ApplicationContext applicationContext;

    @Autowired
    public SpringBeanHandlerInstantiator(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    @Override
    public JsonDeserializer<?> deserializerInstance(DeserializationConfig dc, Annotated antd, Class<? extends JsonDeserializer<?>> type) {
        try {
            return (JsonDeserializer<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public KeyDeserializer keyDeserializerInstance(DeserializationConfig dc, Annotated antd, Class<? extends KeyDeserializer> type) {
        try {
            return (KeyDeserializer) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public JsonSerializer<?> serializerInstance(SerializationConfig sc, Annotated antd, Class<? extends JsonSerializer<?>> type) {
        try {
            return (JsonSerializer<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public TypeResolverBuilder<?> typeResolverBuilderInstance(MapperConfig<?> mc, Annotated antd, Class<? extends TypeResolverBuilder<?>> type) {
        try {
            return (TypeResolverBuilder<?>) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

    @Override
    public TypeIdResolver typeIdResolverInstance(MapperConfig<?> mc, Annotated antd, Class<? extends TypeIdResolver> type) {
        try {
            return (TypeIdResolver) applicationContext.getBean(type);
        } catch (Exception e) {
        }

        return null;
    }

}

@组件
公共类SpringBeanHandlerInstantiator扩展HandlerInstantiator{
私有应用程序上下文应用程序上下文；
@自动连线
公共SpringBeanHandlerInstantiator（ApplicationContext ApplicationContext）{
this.applicationContext=applicationContext；
}
@凌驾
公共JsonDeserializer反序列化器实例（反序列化配置dc，带注释的antd，类>类型）{
试一试{
返回（JsonDeserializer）applicationContext.getBean（类型）；
}捕获（例外e）{
}
返回null；
}
@凌驾
public KeyDeserializer KeyDeserializer实例（反序列化配置dc，带注释的antd，类>类型）{
试一试{
return（JsonSerializer）applicationContext.getBean（type）；
}捕获（例外e）{
}
返回null；
}
@凌驾
公共类型ResolverBuilder类型ResolverBuilderInstance（MapperConfig mc，带注释的antd，类>类型）{
试一试{
return（TypeResolverBuilder）applicationContext.getBean（type）；
}捕获（例外e）{
}
返回null；
}
@凌驾

公共类型IDResolver类型IDResolverInstance（MapperConfig mc，Annotated antd，Class在进一步尝试后，发现ObjectMapperContextResolver上的@Component导致Jersey 2.x不使用提供程序，即使它已在Jersey配置类中显式注册。这与Jersey 1.x行为相反，后者需要@Component

移除它就成功了，这看起来很奇怪。ObjectMapperContextResolver中的@Autowired SpringObjectMapper仍然是由Jersey注入的


从jersey文档中，我无法判断这是设计造成的还是一个bug。
我相信您遇到了bug（在jersey 2.15中已修复）。您可以使用
@命名的
注释，而不是
@组件
（基本相当）在jersey和Spring中配置Jackson的漂亮说明。