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我用Google搜索,但许多关切是“java.lang.IllegalStateException:目标主机不能为空”,但在我的情况下,错误是“java.lang.IllegalStateException :目标主机为null“java.lang.IllegalStateException:目标主机为null
我尝试使用下面的代码
StringEntity reqContent = new StringEntity(xmlData);
reqContent.setContentType("text/xml");
HttpPost req = new HttpPost(serverURL);
req.setEntity(reqContent);
httpClient = new DefaultHttpClient(connMgr, params);
httpClient.getCredentialsProvider().setCredentials(AuthScope.ANY,
new UsernamePasswordCredentials(username, password));
HttpResponse response = httpClient.execute(req);
执行我收到请求后发布的请求‘目标主机是空’。 我给一个有效的主机。当我尝试访问的目标主机不可用时,是否出现此错误?