我正在尝试通过Java向ServiceNow REST API发送一个HTTP请求并创建一个事件。
我在Postman中使用了: URL:POST https://<domain>.service-now.com/api/now/table/em_event
正文:
{
"source":"Postman",
"node":"Codys Mac",
"type":"Test",
"resource":"Test",
"metric_name":"Testing",
"event_class":"Test",
"severity":"4",
"description":"This is a test event, created from REST API.",
}
而且它工作正常,没有问题。
但是在Java中,我除了问题什么都没有。
我发现im尝试遵循的最简单的示例是:https://kodejava.org/how-do-i-send-an-http-post-request/
我的代码如下:
public void post(){
HttpClient client = HttpClientBuilder.create().build();
HttpPost post = new HttpPost(serviceNowURL);
List<NameValuePair> arguments = new ArrayList<>();
arguments.add(new BasicNameValuePair("source", "Sample Producer"));
arguments.add(new BasicNameValuePair("node", "Codys Mac"));
arguments.add(new BasicNameValuePair("type", "Test Event Type"));
arguments.add(new BasicNameValuePair("resource", "Test Event Resource"));
arguments.add(new BasicNameValuePair("metric_name", "Test Event Metric Name"));
arguments.add(new BasicNameValuePair("event_class", "Test Event Class"));
arguments.add(new BasicNameValuePair("sevrity", "5"));
arguments.add(new BasicNameValuePair("description", "This is a test event, created by SampleProducer App usign REST API."));
try{
String encoding = Base64.getEncoder().encodeToString((username.concat(":").concat(password)).getBytes("UTF-8"));
post.setHeader(HttpHeaders.CONTENT_TYPE, "application/json");
post.setHeader(HttpHeaders.ACCEPT, "application/json");
post.setHeader(HttpHeaders.AUTHORIZATION, "Basic " + encoding);
post.setEntity(new UrlEncodedFormEntity(arguments));
HttpResponse response = client.execute(post);
}
catch(Exception e){
System.out.println(ExceptionUtils.getRootCauseMessage(e));
}
}
但是无论何时我运行它,我都会在java.lang.NoSuchFieldError: INSTANCE
的HttpClientBuilder.create().build()
的第一行遇到一个异常,我不知道为什么。
有没有人知道我做错了什么,或者我可以用其他方法来解决这个问题?
发布于 2019-01-21 14:01:43
CloseableHttpClient httpclient = HttpClients.createDefault();
这对我很有效,您不必使用连接管理器打开和关闭连接
https://stackoverflow.com/questions/52749220
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