ERR：無法提取響應：沒有合適HttpMessageConverter

即時得到上述的錯誤：ERR：無法提取響應：沒有合適HttpMessageConverter

控制器：

@Component 
public class NiftyController { 

@Autowired 
private RestProxyTemplate restTemplate; 



@Autowired 
private NiftyDAO niftyDAO; 

int count=1; 




@Scheduled(fixedDelay=5000) 
//@Scheduled(cron="*/5 * * * * ?") 
public void loadNiftyData() throws URISyntaxException { 


    System.out.println("Method executed at every 5 seconds. Current time is : "+ new Date()); 
    System.out.println("Executed " +count++ +" Times"); 

    URI uri = new URI("https://www.nseindia.com/live_market/dynaContent/live_watch/stock_watch/niftyStockWatch.json"); 
    ResponseEntity<NiftyDTO> niftyResponse = restTemplate.getRestTemplate().exchange(uri, HttpMethod.GET, null, NiftyDTO.class); 

    NiftyDTO nifties = niftyResponse.getBody(); 
    System.out.println(nifties.getTrdVolumesum()); 
    //List<Nifty> saveNifty = niftyDAO.save(nifties); 
    //return (Nifty) nifties; 
} 
}

我想從上述鏈路獲取數據，並保存在數據庫中

DTO類

@JsonIgnoreProperties({"latestData","data"}) 
public class NiftyDTO { 

private float trdVolumesumMil; 

private String time; 

private int declines; 

private float trdValueSum; 

private float trdValueSumMil; 

private int unchanged; 

private float trdVolumesum; 

private int advances; 

public float getTrdVolumesumMil() { 
    return trdVolumesumMil; 
} 

public void setTrdVolumesumMil(float trdVolumesumMil) { 
    this.trdVolumesumMil = trdVolumesumMil; 
} 

public String getTime() { 
    return time; 
} 

public void setTime(String time) { 
    this.time = time; 
} 

public int getDeclines() { 
    return declines; 
} 

public void setDeclines(int declines) { 
    this.declines = declines; 
} 

public float getTrdValueSum() { 
    return trdValueSum; 
} 

public void setTrdValueSum(float trdValueSum) { 
    this.trdValueSum = trdValueSum; 
} 

public float getTrdValueSumMil() { 
    return trdValueSumMil; 
} 

public void setTrdValueSumMil(float trdValueSumMil) { 
    this.trdValueSumMil = trdValueSumMil; 
} 

public int getUnchanged() { 
    return unchanged; 
} 

public void setUnchanged(int unchanged) { 
    this.unchanged = unchanged; 
} 

public float getTrdVolumesum() { 
    return trdVolumesum; 
} 

public void setTrdVolumesum(float trdVolumesum) { 
    this.trdVolumesum = trdVolumesum; 
} 

public int getAdvances() { 
    return advances; 
} 

public void setAdvances(int advances) { 
    this.advances = advances; 
} 
}

RestProxyTemplate：

@Component 
public final class RestProxyTemplate { 


RestTemplate restTemplate; 

@PostConstruct 
public void init(){ 
    restTemplate = new RestTemplate(); 
    SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory(); 
    InetSocketAddress address = new InetSocketAddress("MY PROXY GOES HERE",8080); 
    Proxy proxy = new Proxy(Proxy.Type.HTTP,address); 
    factory.setProxy(proxy); 

    restTemplate.setRequestFactory(factory); 
} 

public RestTemplate getRestTemplate() { 
    return restTemplate; 
} 
}

錯誤日誌：

Method executed at every 5 seconds. Current time is : Mon Jun 05 10:45:38 IST 2017 
Executed 1 Times 
2017-06-05 10:45:38.141 INFO 108988 --- [   main] 
s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8090 (http) 
2017-06-05 10:45:38.153 INFO 108988 --- [   main] 
com.MyApplication.portfolio.PMSApplication  : Started PMSApplication in 5.041 seconds (JVM running for 5.573) 
2017-06-05 10:45:39.028 ERROR 108988 --- [pool-2-thread-1] o.s.s.s.TaskUtils$LoggingErrorHandler : Unexpected error occurred in scheduled task. 

org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class com.MyApplication.portfolio.controller.NiftyDTO] and content type [text/plain] 
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:109) ~[spring-web-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:835) ~[spring-web-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:819) ~[spring-web-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:599) ~[spring-web-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:572) ~[spring-web-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:493) ~[spring-web-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at com.MyApplication.portfolio.controller.NiftyController.loadNiftyData(NiftyController.java:44) ~[classes/:na] 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92] 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_92] 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_92] 
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_92] 
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65) ~[spring-context-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) ~[spring-context-4.2.8.RELEASE.jar:4.2.8.RELEASE] 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_92] 
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_92] 
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_92] 
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_92] 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_92] 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_92] 
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_92]

即時得到否Sutiable HttpMessageConverter找到的響應類型，可以有一個人建議這樣做的可能的解決方案??

來源

2017-06-05 DeathPulse

響應看起來像什麼？響應的內容類型是什麼？您可以檢查RestTemplate確定支持的內容類型或編碼類型，或者可以正確處理響應內容。發佈更多詳細信息會有幫助。 –

我沒有得到任何迴應。 – DeathPulse

那麼你希望春天如何處理？ –

您需要處理application/json而不是text/plain。

private static void temp() { 
     HttpHeaders requestHeaders = new HttpHeaders(); 
//  requestHeaders.setAccept(Collections.singletonList(new MediaType("application","json"))); 
     requestHeaders.setAccept(Collections.singletonList(new MediaType("text","plain"))); 
     HttpEntity<?> requestEntity = new HttpEntity<>(requestHeaders); 

// Create a new RestTemplate instance 
     RestTemplate restTemplate = new RestTemplate(); 

// Add the Jackson message converter 
     MappingJackson2HttpMessageConverter mc = new MappingJackson2HttpMessageConverter() ; 
     mc.setSupportedMediaTypes(Collections.singletonList(new MediaType("text","plain"))); 
     restTemplate.getMessageConverters().add(mc); 

     String url = "https://www.nseindia.com/live_market/dynaContent/live_watch/stock_watch/niftyStockWatch.json"; 
     ResponseEntity<NiftyDTO> responseEntity = restTemplate.exchange(url, HttpMethod.GET, requestEntity, NiftyDTO.class); 
     NiftyDTO res = responseEntity.getBody(); 
     System.out.println(res); 
    }

代碼從the docs了和修改了一下

UPDATE：本次變動後的代碼工作正常，但存在是造成另一個錯誤：com.fasterxml.jackson.databind.exc.InvalidFormatException: Can not deserialize value of type float from String "4,092.10": not a valid Float value

您將需要修復數據的反序列化與,分隔符。

來源

2017-06-05 06:47:34 StanislavL

仍然即時得到同樣的錯誤@StanislavL – DeathPulse

答案更新 – StanislavL

笏這是用於？ 'HttpEntity requestEntity = new HttpEntity <>（requestHeaders）;'？ – DeathPulse

ERR：無法提取響應：沒有合適HttpMessageConverter

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