怎么使用CloseableHttpClient实现rpc通讯

使用 CloseableHttpClient 实现 RPC 通讯需要以下步骤：

1. 创建 CloseableHttpClient 对象，可以通过 HttpClientBuilder 来创建：

CloseableHttpClient httpClient = HttpClientBuilder.create().build();

2. 创建 HttpPost 对象，设置请求参数和请求头：

HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");
StringEntity requestEntity = new StringEntity(jsonParams, ContentType.APPLICATION_JSON);
httpPost.setEntity(requestEntity);

其中，url 是 RPC 服务的地址，jsonParams 是 JSON 格式的请求参数。

3. 执行请求，获取响应：

CloseableHttpResponse response = httpClient.execute(httpPost);

4. 解析响应，获取返回结果：

String result = EntityUtils.toString(response.getEntity(), "UTF-8");

其中，result 是 RPC 服务返回的结果，可以根据实际情况进行解析和处理。

完整代码如下：

CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");
StringEntity requestEntity = new StringEntity(jsonParams, ContentType.APPLICATION_JSON);
httpPost.setEntity(requestEntity);
CloseableHttpResponse response = httpClient.execute(httpPost);
String result = EntityUtils.toString(response.getEntity(), "UTF-8");