httpcomponents不按照說明書工作

使用我在這裏找到的代碼：http://hc.apache.org/httpcomponents-client-ga/quickstart.html我創建了一個快速的HTTP客戶端應用程序。下面的代碼片段：httpcomponents不按照說明書工作

DefaultHttpClient httpclient = new DefaultHttpClient(); 
HttpGet httpGet = new HttpGet(url); 
log.info("Logging in"); 
HttpResponse response; 
try { 
    response = httpclient.execute(httpGet); 
} 
catch (ClientProtocolException cpe) { 
    String msg = "Error logging in with:" + rootUrl; 
    log.error(msg, cpe); 
    throw new BusinessRuleException(msg, cpe); 
} 
catch (IOException ioe) { 
    String msg = "Error logging in with:" + rootUrl; 
    log.error(msg, ioe); 
    throw new BusinessRuleException(msg, ioe); 
} 

try { 
    System.out.println(response.getStatusLine()); 
    HttpEntity entity = response.getEntity(); 
    // do something useful with the response body 
    // and ensure it is fully consumed 
    EntityUtils.consume(entity); 
} 
catch (IOException ioe) { 
    String msg = "Error retrieving login response:" + rootUrl; 
    log.error(msg, ioe); 
    throw new BusinessRuleException(msg, ioe); 
} 
finally { 
    httpGet.releaseConnection(); 
}

我得到這個異常：

java.lang.NoSuchMethodError: org.apache.http.client.methods.HttpGet.releaseConnection()V 
    at com.xerox.tclg.juror.schedule.RestScheduleRunner.runDailyCheckout(RestScheduleRunner.java:93) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276) 
    at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)

我發現一些文件提到releaseConnection（）是沒有必要的，所以我刪除了finally塊。然後，我得到這個異常：

java.lang.NoSuchMethodError: org.apache.http.util.EntityUtils.consume(Lorg/apache/http/HttpEntity;)V 
    at com.xerox.tclg.juror.schedule.RestScheduleRunner.runDailyCheckout(RestScheduleRunner.java:85) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276) 
    at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)

有沒有人見過這個？

來源

2012-10-11 Thom

您確定運行應用程序時使用的HttpCore包與在IDE中開發和編譯時使用的包相同嗎？ – ppeterka

在這種情況下，java.lang.NoSuchMethodError很可能意味着您獲得了其中一個Http組件JAR文件的錯誤版本。

如果你能找到「RestScheduleRunner.java:85」中發生了什麼，它可能會幫助你診斷問題。

來源

2012-10-11 12:31:34

httpcomponents不按照說明書工作

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