如何使用Jackson将POJO转换为XML

POJO TestUser

public class TestUser extends JsonType
{
    @JsonProperty("username")
    private final String username;
    @JsonProperty("fullname")
    private final String fullname;
    @JsonProperty("email")
    private final String email;
    @JsonProperty("enabled")
    private final Boolean enabled;

    @JsonCreator
    public TestUser(
        @JsonProperty("username") String username,@JsonProperty("fullname") String fullname,@JsonProperty("email") String email,@JsonProperty("enabled") Boolean enabled)
        {
            this.username = username;
            this.fullname = fullname;
            this.email = email;
            this.enabled = enabled;
        }
        @JsonGetter("username")
        public String getUsername()
        {
            return username;
        }
        @JsonGetter("fullname")
        public String getFullname()
        {
            return fullname;
        }
        @JsonGetter("email")
        public String getEmail()
        {
            return email;
        }
        @JsonGetter("enabled")
        public Boolean getEnabled()
        {
            return enabled;
        }
    }
}

这是代码：

public void testJsonToXML() throws JsonParseException,JsonMappingException,IOException
{
    String jsonInput = "{"username":"FOO","fullname":"FOO BAR","email":"foobar@foobar.com","enabled":"true"}";

    ObjectMapper jsonMapper = new ObjectMapper();
    TestUser foo = jsonMapper.readValue(jsonInput,TestUser.class);
    XmlMapper xmlMapper = new XmlMapper();
    System.out.println(xmlMapper.writer().with(SerializationFeature.WRAP_ROOT_VALUE).withRootName("product").writeValueAsString(foo));
}

现在它又回来了

<TestUser xmlns="">
    <product>
        <username>FOO</username>
        <fullname>FOO BAR</fullname>
        <email>foobar@foobar.com</email>
        <enabled>true</enabled>
    </product>
</TestUser>

哪个好,但是我需要启用变量作为username的属性然后我需要将xmlns和xsi属性添加到根元素,因此XML结果看起来像这样

<TestUser xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="testUser.xsd">
    <product>
        <username enabled="true">FOO</username>
        <fullname>FOO BAR</fullname>
        <email>foobar@foobar.com</email>
    </product>
</TestUser>

我找到了一些使用@JacksonXmlProperty的例子,但它只将属性添加到根元素.

感谢帮助