Question

我有以下设置在序列化和反序列化JSON期间启用根元素包装。我正在使用带有Spring MVC Rest的Jackson库。我正在使用的Jackson库版本是2.7.4。

但是下面的设置没有指定我的REST服务返回的JSON对象中的ROOT元素。我在这里遗漏了一些东西，检查了很多帖子，大多数都只提到了下面的配置。

pom.xml文件如下

      <jackson.version>2.7.4</jackson.version>

       <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>

构建Jackson对象映射器对象

private static MappingJackson2HttpMessageConverter buildJSONMessageConverter() {

    Jackson2ObjectMapperBuilder builder = Jackson2ObjectMapperBuilder.json();
    builder.propertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
    builder.serializationInclusion(Include.NON_NULL);
    builder.featuresToEnable(DeserializationFeature.UNWRAP_ROOT_VALUE);
    builder.featuresToEnable(SerializationFeature.WRAP_ROOT_VALUE);
    builder.indentOutput(true);
    MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter(builder.build());
    return converter;
}

类域定义

@JsonRootName(value = "Brand")
@JsonAutoDetect(fieldVisibility = Visibility.ANY, getterVisibility =     Visibility.NONE, setterVisibility = Visibility.NONE)
public class Brand{
....
}

返回的JSON没有Brand作为根节点

在序列化期间，杰克逊序列化POJO到JSON缺少ROOT元素

0 个答案: