java中获得response的有哪些方法

在Java中，获得response的方法主要是通过使用HttpURLConnection还是HttpClient来发送HTTP要求，然后获得服务器的响应数据。
使用HttpURLConnection获得response的方法以下：
```java
URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
response.append(line);
}
reader.close();
String responseData = response.toString();
// 处理响应数据
} else {
// 处理要求失败的情况
}
connection.disconnect();
```
使用HttpClient获得response的方法以下：
```java
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("http://example.com");
CloseableHttpResponse response = httpClient.execute(httpGet);
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == HttpStatus.SC_OK) {
HttpEntity entity = response.getEntity();
String responseData = EntityUtils.toString(entity);
// 处理响应数据
} else {
// 处理要求失败的情况
}
response.close();
httpClient.close();
```
以上是两种经常使用的获得response的方法，具体使用哪一种方法取决于你的需求和项目环境。