我正在使用spring android rest template
并试图将JSON响应转换为java类,如here所示。android RestClientException:找不到合适的HttpMessageConverter
这里是我的代码段试图做的工作:
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
//I have already tried to manually setting converters with no luck
//List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
//messageConverters.add(new MappingJacksonHttpMessageConverter());
//messageConverters.add(new FormHttpMessageConverter());
//messageConverters.add(new StringHttpMessageConverter());
//restTemplate.setMessageConverters(messageConverters);
Result result = restTemplate.getForObject(url, Result.class);
我觉得我已经做了所需要的一切,因为它是在文件中说:
- 我已经在我的类路径 以下罐子
- jackson-all-1.7.6.jar
- spring-android-rest-template-1.0.0.M2.jar
url
确实返回一个JSON对象。- 我
Result
类是所有必填字段
一个POJO基本上有我的类路径中Jackson dependencies
必须足够得到它的工作,因为它说:
的MappingJacksonHttpMessageConverter有条件加载时你创建一个新的RestTemplate实例。如果在您的类路径中找到Jackson依赖关系,则消息转换器将自动添加并可用于REST操作。
所以我在这里错过了什么,我做错了什么?
感谢
全部异常可以在这里找到:
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): FATAL EXCEPTION: main
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): java.lang.IllegalStateException: Could not execute method of the activity
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.view.View$1.onClick(View.java:2083)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.view.View.performClick(View.java:2421)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.view.View$PerformClick.run(View.java:8869)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.os.Handler.handleCallback(Handler.java:587)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.os.Handler.dispatchMessage(Handler.java:92)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.os.Looper.loop(Looper.java:143)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.app.ActivityThread.main(ActivityThread.java:5068)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at java.lang.reflect.Method.invoke(Method.java:521)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at dalvik.system.NativeStart.main(Native Method)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): Caused by: java.lang.reflect.InvocationTargetException
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at xxx.SamplePageActivity.doRest(SamplePageActivity.java:83)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at java.lang.reflect.Method.invoke(Method.java:521)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at android.view.View$1.onClick(View.java:2078)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): ... 11 more
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): Caused by: org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [[Lxxx.SamplePageActivity$Result;] and content type [application/json;charset=UTF-8]
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:77)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:449)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:404)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:202)
04-20 04:25:52.706: ERROR/AndroidRuntime(9638): ... 15 more
这非常有趣。我很想听到答案。 – aykut 2011-05-03 07:50:26