最近跟某家公司合作，對方開了一個GET方法帶請求體的API，試過Spring boot的restTemplate物件、Apache Http Client、OkHttpClient都無法於呼叫API時傳入Request Body，最後找到一篇有人使用AsyncHttpClient成功傳入的作法。
1.Maven
<dependency>
<groupId>org.asynchttpclient</groupId>
<artifactId>async-http-client</artifactId>
<version>2.12.3</version>
</dependency>2.JAVA CODE
import org.asynchttpclient.AsyncHttpClient;
import org.asynchttpclient.Dsl;
import org.asynchttpclient.Request;
import org.asynchttpclient.RequestBuilder;
import org.asynchttpclient.Response;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
public class AsyncHttpClientExample {
public static void main(String[] args) {
// 創建AsyncHttpClient
AsyncHttpClient client = Dsl.asyncHttpClient();
// 請求URL和請求體
String pUrl = "http://example.com/api";
String pBody = "{\"key\":\"value\"}";
// 創建Header的Map
Map<String, String> headers = new HashMap<>();
headers.put("Content-Type", "application/json");
headers.put("Authorization", "Bearer your_token_here");
headers.put("Custom-Header-Name", "Custom-Header-Value");
// 構建請求並設置標頭
RequestBuilder requestBuilder = new RequestBuilder("GET")
.setUrl(pUrl)
.setBody(pBody); // 嘗試添加請求體
// 從Map中添加標頭
for (Map.Entry<String, String> header : headers.entrySet()) {
requestBuilder.setHeader(header.getKey(), header.getValue());
}
Request request = requestBuilder.build();
// 發送請求
Future<Response> responseFuture = client.executeRequest(request);
try {
// 獲取響應
Response response = responseFuture.get();
System.out.println("Response: " + response.getResponseBody());
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
} finally {
try {
// 關閉客戶端
client.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}