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java怎么調(diào)用post接口

小億
374
2023-09-18 16:50:56
欄目: 編程語言

在Java中調(diào)用POST接口，可以使用Java內(nèi)置的 HttpURLConnection 類或者 Apache HttpClient 類。下面分別介紹這兩種方法：

  1. 使用 HttpURLConnection 類：
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpPostExample {
public static void main(String[] args) {
try {
// 創(chuàng)建URL對象
URL url = new URL("http://example.com/api/endpoint");
// 創(chuàng)建HttpURLConnection對象
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
// 設(shè)置請求方法為POST
connection.setRequestMethod("POST");
// 添加請求頭
connection.setRequestProperty("Content-Type", "application/json");
// 啟用輸出流，并指定請求體的內(nèi)容
connection.setDoOutput(true);
String requestBody = "{\"key1\":\"value1\", \"key2\":\"value2\"}";
DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
outputStream.writeBytes(requestBody);
outputStream.flush();
outputStream.close();
// 獲取響應(yīng)碼
int responseCode = connection.getResponseCode();
// 讀取響應(yīng)內(nèi)容
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
response.append(line);
}
reader.close();
// 打印響應(yīng)結(jié)果
System.out.println("Response Code: " + responseCode);
System.out.println("Response Body: " + response.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
}
  1. 使用 Apache HttpClient 類：
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
public class HttpPostExample {
public static void main(String[] args) {
try {
// 創(chuàng)建HttpClient對象
HttpClient httpClient = HttpClientBuilder.create().build();
// 創(chuàng)建HttpPost對象，并設(shè)置URL
HttpPost httpPost = new HttpPost("http://example.com/api/endpoint");
// 設(shè)置請求頭
httpPost.setHeader("Content-Type", "application/json");
// 設(shè)置請求體的內(nèi)容
String requestBody = "{\"key1\":\"value1\", \"key2\":\"value2\"}";
StringEntity requestEntity = new StringEntity(requestBody);
httpPost.setEntity(requestEntity);
// 發(fā)送POST請求
HttpResponse response = httpClient.execute(httpPost);
// 獲取響應(yīng)碼
int responseCode = response.getStatusLine().getStatusCode();
// 讀取響應(yīng)內(nèi)容
HttpEntity responseEntity = response.getEntity();
String responseBody = EntityUtils.toString(responseEntity);
// 打印響應(yīng)結(jié)果
System.out.println("Response Code: " + responseCode);
System.out.println("Response Body: " + responseBody);
} catch (Exception e) {
e.printStackTrace();
}
}
}

以上代碼示例中，假設(shè)要調(diào)用的接口為 http://example.com/api/endpoint，請求體的內(nèi)容為 {"key1":"value1", "key2":"value2"}，你需要根據(jù)實(shí)際情況進(jìn)行修改。

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