单引号非标准json解析

今天浪费了一下午时间在调试spring4.x 里的jackson，发现jackson解析的时候需要是标准json。
标准{"dd":21}
{'dd':21}非标准，添加  mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true)也可以正常解析。
{dd:21}不是json，解析不了
关键spring4.x里是不能对{'dd':21}解析的，除非自己申明ALLOW_SINGLE_QUOTES。


public static  void main(String[] ss)
    {
        String str = "{'dd':21}";
        ObjectMapper mapper = new ObjectMapper();
//        mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
        InputStream inputStream   =   new   ByteArrayInputStream(str.getBytes());
       JavaType jt = mapper.getTypeFactory().constructType(TData.class, TData.class.getClass());
        try
        {
            TData data =mapper.readValue(inputStream,jt );
            System.out.print(data.getDd());
        } catch (IOException e)
        {
            e.printStackTrace();
        }
    }
会报错
com.fasterxml.jackson.core.JsonParseException: Unexpected character (''' (code 39)): was expecting double-quote to start field name
at [Source: java.io.ByteArrayInputStream@185fac52; line: 1, column: 3]
at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1524)
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:557)
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:475)
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._handleOddName(UTF8StreamJsonParser.java:1783)
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._parseName(UTF8StreamJsonParser.java:1480)
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.nextToken(UTF8StreamJsonParser.java:700)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:118)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2993)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2158)