Twitter4J在TwitterFactory中拋出異常

我試圖通過oauth訪問Twitter。因此，我註冊了我的應用程序，下載Twitter4j，我在Eclipse的項目加入罐，然後試圖執行以下代碼：Twitter4J在TwitterFactory中拋出異常

Twitter twitter = new TwitterFactory().getOAuthAuthorizedInstance("[key]","[secretKey]"); 
RequestToken requestToken = twitter.getOAuthRequestToken(); 
System.out.println(requestToken.getAuthorizationURL());

但它會引發以下異常：

[Sat May 29 11:19:11 CEST 2010]Using class twitter4j.internal.logging.StdOutLoggerFactory as logging factory. 
[Sat May 29 11:19:11 CEST 2010]Use twitter4j.internal.http.alternative.HttpClientImpl as HttpClient implementation. 
Exception in thread "main" java.lang.AssertionError: java.lang.reflect.InvocationTargetException 
    at twitter4j.internal.http.HttpClientFactory.getInstance(HttpClientFactory.java:71) 
    at twitter4j.internal.http.HttpClientWrapper.<init>(HttpClientWrapper.java:59) 
    at twitter4j.http.OAuthAuthorization.init(OAuthAuthorization.java:83) 
    at twitter4j.http.OAuthAuthorization.<init>(OAuthAuthorization.java:74) 
    at twitter4j.TwitterFactory.getOAuthAuthorizedInstance(TwitterFactory.java:112) 
    at MainProgram.main(MainProgram.java:18) 
Caused by: java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at twitter4j.internal.http.HttpClientFactory.getInstance(HttpClientFactory.java:65) 
    ... 5 more 
Caused by: java.lang.NoClassDefFoundError: org/apache/http/impl/client/DefaultHttpClient 
    at twitter4j.internal.http.alternative.HttpClientImpl.<init>(HttpClientImpl.java:63) 
    ... 10 more

我目前無法弄清楚爲什麼...你能給我一些建議嗎？

問候菲利普

來源

2010-05-29 Philipp Andre

Caused by: java.lang.NoClassDefFoundError: org/apache/http/impl/client/DefaultHttpClient

你需要的Apache HTTP組件添加到你的classpath

來源

2010-05-29 09:31:46 Guillaume

我已經添加了twitter4j-httpclient-support-2.1.3-SNAPSHOT.jar以及httpclient-4.0.1.jar，但是這並沒有改變任何東西。：/ – 2010-05-29 09:39:12

嘗試在一個簡單的類中使用DefaultHttpClient以確保它實際上位於項目的類路徑中 – Guillaume 2010-05-29 09:52:14

DefaultHttpClient client = new DefaultHttpClient（）;無任何例外地執行。 – 2010-05-29 10:05:15

因爲我讀的Eclipse項目「 - 這實際上是一個插件/ RCP的項目和庫駐留在其他插件中，則必須通過plugin.xml導出所需的包，否則將導致NoClassDefFound錯誤。

來源

2010-05-29 09:57:55

謝謝！但這不是一個插件項目:) – 2010-05-29 10:10:25

Twitter4J在TwitterFactory中拋出異常

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