JSON 无效的 UTF-8 中间字节

Question

当( jackson ，本例)JSON 引擎尝试解析一些未以 UTF-8 编码的 JSON 时，会发生此错误。

如何告诉引擎它应该期待不同于 UTF-8 的内容，例如 UTF-16？

HttpHeaders requestHeaders = createSomeHeader();
RestTemplate restTemplate = new RestTemplate();
HttpEntity<?> requestEntity = new HttpEntity<Object>(requestHeaders);
String url = "someurl"
ResponseEntity<MyObject[]> arrayResponseEntity = restTemplate.exchange(url, HttpMethod.GET, requestEntity, MyObject[].class);

错误日志:

Caused by: org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Invalid UTF-8 middle byte 0x20
at [Source: org.apache.http.conn.EofSensorInputStream@44d397b0; line: 92, column: 42]; nested exception is org.codehaus.jackson.JsonParseException: Invalid UTF-8 middle byte 0x20
at [Source: org.apache.http.conn.EofSensorInputStream@44d397b0; line: 92, column: 42]
at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readInternal(MappingJacksonHttpMessageConverter.java:138)
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$ResponseEntityResponseExtractor.extractData(RestTemplate.java:622)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:608)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:449)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:404)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:380)
... 4 more
Caused by: org.codehaus.jackson.JsonParseException: Invalid UTF-8 middle byte 0x20
at [Source: org.apache.http.conn.EofSensorInputStream@44d397b0; line: 92, column: 42]
at org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1213)
at org.codehaus.jackson.impl.JsonParserMinimalBase._reportError(JsonParserMinimalBase.java:375)
at org.codehaus.jackson.impl.Utf8StreamParser._reportInvalidOther(Utf8StreamParser.java:2132)
at org.codehaus.jackson.impl.Utf8StreamParser._reportInvalidOther(Utf8StreamParser.java:2139)
at org.codehaus.jackson.impl.Utf8StreamParser._decodeUtf8_3fast(Utf8StreamParser.java:1962)

Answer 1

JSON 数据必须编码为 UTF-8、UTF-16 或 UTF-32。 JSON解码器可以通过examining the first four octets判断编码字节流:

       00 00 00 xx  UTF-32BE
       00 xx 00 xx  UTF-16BE
       xx 00 00 00  UTF-32LE
       xx 00 xx 00  UTF-16LE
       xx xx xx xx  UTF-8

听起来服务器正在以某种非法编码(ISO-8859-1、windows-1252 等)对数据进行编码