java使JacksonMappingHttpMessageConverter在springmvc中工作

Question

我的控制器中有以下设置

@RequestMapping(value="/security_param", method=RequestMethod.GET)
    public @ResponseBody BigInteger getSecurityParam(){
        return result.getBigInteger();
    }

因此，当我通过在浏览器中键入来检查我的回复时，我得到了以下信息：

350094078853290372226929324000742644466642262681952226409886256271736198431807728267526406481556587992703721192341876290504971375383029475460844121232586227913173796191951197042895656298303777249177945550375699884594977303136892333029758596862673993846972456155271723432095094859391751714939658055297007851105568438549148984628844489662466256443824528144049402449678472642642...truncated

在我的RestTemplate方面，我有这样的JacksonMappingHttpMessageConverter设置：

CommonsClientHttpRequestFactory factory =  new CommonsClientHttpRequestFactory(commonsClient);

        RestTemplate httpClient2 = new RestTemplate(factory);
        List<HttpMessageConverter<?>> converters = new ArrayList();
        converters.add(new MappingJacksonHttpMessageConverter());
        httpClient2.setMessageConverters(converters);

        URL serverDomainUrl = new URL("http://127.0.0.1:8080");
        String urlPath = new URL(serverDomainUrl, "/trusted_server/security_param").toString();

        BigInteger xx = httpClient2.getForObject(urlPath, BigInteger.class);

不知怎的，反序列化没有很好地工作，我得到了以下错误

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 200
    at org.codehaus.jackson.impl.Utf8StreamParser.parseNumberText(Utf8StreamParser.java:531)
    at org.codehaus.jackson.impl.Utf8StreamParser._nextTokenNotInObject(Utf8StreamParser.java:435)
    at org.codehaus.jackson.impl.Utf8StreamParser.nextToken(Utf8StreamParser.java:323)
    at org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2439)
    at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2396)
    at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1662)
    at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readInternal(MappingJacksonHttpMessageConverter.java:135)
    at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:154)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:74)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:446)

尝试强制字符串对象类型也会产生相同的结果。似乎长度有某种限制

有人知道这是什么原因吗？我试着四处看看，但找不到任何答案