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我正在尝试将 Jackson2.0.0 与 Spring3.1 一起使用，以便可以使用 jackson-Module-Hibernate。我已经按照这里描述的步骤http://blog.pastelstudios.com/2012/03/12/spring-3-1-hibernate-4-jackson-module-hibernate/。所有这一切似乎都很好，但是当我尝试使用 JSON 视图以便 JSON 仅包含视图中的字段时，它不起作用。

活动视图始终为空。如何使视图处于活动状态？我已经尝试了一天没有运气......任何帮助都将不胜感激。提前致谢。

以下是相关代码。

这是映射器

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.hibernate4.Hibernate4Module;

public class HibernateAwareObjectMapper extends ObjectMapper {

public HibernateAwareObjectMapper() {
    Hibernate4Module hm = new Hibernate4Module();
    registerModule(hm);  
    hm.configure(Hibernate4Module.Feature.FORCE_LAZY_LOADING, true);
}

}

这是视图类

public class DiffViews {
 public static class Public { }

}

这是我使用视图的 POJO

 @JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class, property="@id")
 @JsonIgnoreProperties(ignoreUnknown=true)
 @Entity
 public class Premium implements java.io.Serializable {

@JsonView(DiffViews.Public.class)
private String sequence;
@JsonView(DiffViews.Public.class)

@Column(name = "SEQUENCE", nullable = false, length = 4)
public String getSequence() {
    return this.sequence;
}

public void setSequence(String sequence) {
    this.sequence = sequence;
}

@Column(name = "NAME", nullable = false)
public String getName() {
    return this.name;
}

public void setName(String name) {
    this.name = name;
}

)

在我的弹簧控制器中

@RequestMapping("/cartonPremium")
public void listAll(
        @RequestParam("page") int page, @RequestParam("rows") int maxResults, 
        @RequestParam("sidx") String sortKey, @RequestParam("sord") String sortOrder, HttpServletResponse response) {

    HibernateAwareObjectMapper mapper = new HibernateAwareObjectMapper();
    mapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
    mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
    mapper.enable(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS);
    mapper.disable(MapperFeature.DEFAULT_VIEW_INCLUSION );

    JqgridResponse<Premium> gridResponse = new JqgridResponse<Premium>();
    gridResponse.setRows(premiumList);
    gridResponse.setRecords(""+premiumList.size());
    gridResponse.setTotal(""+premiumList.size());
    gridResponse.setPage(""+page);      

    try {
        ObjectWriter objWriter= mapper.writerWithView(DiffViews.Public.class);
        Class<?> xxx = mapper.getSerializationConfig().getActiveView();
        objWriter.writeValue(response.getOutputStream(), gridResponse);
        //mapper.writerWithView(DiffViews.Public.class).writeValue(response.getOutputStream(), gridResponse);
    } catch (JsonGenerationException e) {
        e.printStackTrace();
    } catch (JsonMappingException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

我的弹簧配置

    <mvc:annotation-driven>
    <mvc:message-converters>    
        <bean class="com.creata.json.MappingJackson2HttpMessageConverter">        
            <property name="objectMapper">            
                <bean class="com.creata.json.HibernateAwareObjectMapper" />        
            </property>    
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>
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1 回答 1

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我终于找到了我的错误......我在一个名为 JqgridResponse 的包装器中返回了我的域 POJO，并且我没有在这个包装器类的字段上添加 @JsonView 注释。所以一切都很好，json 视图不会被忽略。

于 2012-10-14T23:39:41.997 回答