Android robospice中的json读取错误
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时间：2020-08-20 09:01:31 来源:igfitidea点击:
json reading error in robospice
提问by Issac Balaji
Logcat error
日志错误
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): 06:43:48.147 Thread-9164 An exception occurred during request network execution :Could not read JSON: Can not deserialize instance of java.lang.String out of START_OBJECT token
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at [Source: java.util.zip.GZIPInputStream@420e4cc8; line: 1, column: 1]; nested exception is com.fasterxml.Hymanson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at [Source: java.util.zip.GZIPInputStream@420e4cc8; line: 1, column: 1]
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not deserialize instance of java.lang.String out of START_OBJECT token
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at [Source: java.util.zip.GZIPInputStream@420e4cc8; line: 1, column: 1]; nested exception is com.fasterxml.Hymanson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at [Source: java.util.zip.GZIPInputStream@420e4cc8; line: 1, column: 1]
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter.readInternal(MappingHymanson2HttpMessageConverter.java:126)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:147)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:76)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:484)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:439)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:317)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com..rb.PostRequest.loadDataFromNetwork(PostRequest.java:90)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com..rb.PostRequest.loadDataFromNetwork(PostRequest.java:1)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.octo.android.robospice.request.CachedSpiceRequest.loadDataFromNetwork(CachedSpiceRequest.java:45)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.octo.android.robospice.request.DefaultRequestRunner.processRequest(DefaultRequestRunner.java:149)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.octo.android.robospice.request.DefaultRequestRunner.run(DefaultRequestRunner.java:216)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at java.lang.Thread.run(Thread.java:841)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): Caused by: com.fasterxml.Hymanson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at [Source: java.util.zip.GZIPInputStream@420e4cc8; line: 1, column: 1]
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.fasterxml.Hymanson.databind.DeserializationContext.mappingException(DeserializationContext.java:575)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.fasterxml.Hymanson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:46)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.fasterxml.Hymanson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:11)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.fasterxml.Hymanson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2888)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at com.fasterxml.Hymanson.databind.ObjectMapper.readValue(ObjectMapper.java:2094)
07-30 06:43:48.135: E//DefaultRequestRunner.java:153(29678): at org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter.readInternal(MappingHymanson2HttpMessageConverter.java:123)
and this is my code in using robospice
这是我使用 robospice 的代码
RestTemplate restTemplate = new RestTemplate();
// Add the Hymanson and String message converters
restTemplate.getMessageConverters().add(new MappingHymanson2HttpMessageConverter());
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
// Make the HTTP POST request, marshaling the request to JSON, and the response to a
String response = restTemplate.postForObject(url, message, String.class);
return response;
Note: this same code is working fine some of the json output, some different kind of json, I'm getting this error, I tried to find out the json structure where exactly but what I feel both are same, so I get confused, at the same time I shout the reason of this error
注意：同样的代码在一些 json 输出，一些不同类型的 json 中工作正常，我收到此错误，我试图找出 json 结构，但我觉得两者完全相同，所以我感到困惑，同时我大喊这个错误的原因
回答by Issac Balaji
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
messageConverters.add(new FormHttpMessageConverter());
messageConverters.add(new StringHttpMessageConverter());
messageConverters.add(new MappingHymansonHttpMessageConverter());
restTemplate.setMessageConverters(messageConverters);
now i got solution but don't how and all but i could understand that the problem for reading json ,as per my understanding the conversion of the Hymanson from json to string just i changed and added these converted, then is working fine
现在我得到了解决方案，但不知道如何解决，但我可以理解读取 json 的问题，根据我的理解，Hymanson 从 json 到字符串的转换只是我更改并添加了这些转换，然后工作正常
回答by Snicolas
It looks like the json you receive contains an object, not a string as you would expect. This is RS usage and Hymanson, not RS itself.
看起来您收到的 json 包含一个对象，而不是您期望的字符串。这是 RS 用法和 Hymanson，而不是 RS 本身。
