我的Java应用程序中有jersey REST客户端,我想以JSON格式发送请求,并且请求对象包含Element.

当我以XML格式发送请求时,一切正常,但是当尝试以JSON格式发送请求时,服务器发送请求失败.

如果我创建元素而不附加到文档,则会产生以下错误：

com.fasterxml.jackson.databind.JsonMappingException: Direct self-reference leading to cycle

如果我创建元素并将其附加到文档,则会生成以下错误(doc.appendChild(root);)：

com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (*Error)

这是我创建请求对象的方式：

public OTAAirLowFareSearchRS AirLowFareSearch(OTAAirLowFareSearchRQ request) throws Exception {
        OTAAirLowFareSearchRS response = new OTAAirLowFareSearchRS();
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = dbf.newDocumentBuilder();
        Document doc = builder.newDocument();
        Element root = doc.createElement("TPA_Extension");
        doc.appendChild(root); // This the line I mention above that create different errors
        Element e = doc.createElement("CUSTOM_VAR");
        root.appendChild(e);
        e.insertBefore(doc.createTextNode("CUSTOM_VALUE"), e.getLastChild());
        TPAExtensionsType tpa = new TPAExtensionsType();
        tpa.getAny().add(root);
        request.getPOS().getSource().get(0).setTPAExtensions(tpa);
        JacksonJsonProvider jacksonJsonProvider = new JacksonJaxbJsonProvider().configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        Client client = ClientBuilder.newClient(new ClientConfig(jacksonJsonProvider));
        WebTarget target = client.target(GlobalVariable.bus_url).path("AirLowFareSearch");
        response = target
                .request(MediaType.APPLICATION_JSON_TYPE)
                .post(Entity.entity(request, MediaType.APPLICATION_JSON_TYPE),
                OTAAirLowFareSearchRS.class);
        return response;
}

当我以XML格式发送请求时,一切正常：

        //JacksonJsonProvider jacksonJsonProvider = new JacksonJaxbJsonProvider().configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        //Client client = ClientBuilder.newClient(new ClientConfig(jacksonJsonProvider));
        Client client = ClientBuilder.newClient();
        WebTarget target = client.target(GlobalVariable.bus_url).path("AirLowFareSearch");
        response = target
                .request(MediaType.APPLICATION_JSON_TYPE)
                .post(Entity.entity(request, MediaType.APPLICATION_XML_TYPE),
                OTAAirLowFareSearchRS.class);

当我发送请求而不添加元素时,我也可以发送JSON请求(因此在配置JSON时没有错误).

这也是“打开旅行”对象,我也无法更改请求.

请帮我.

解决方法:

问题来自DOM Elements.解决此问题的最佳方法是使用地图而不是DOM元素,以便您轻松处理地图.