发送get请求并且发送请求头（header），java实现

发送get请求时，发送请求头（Header）中的内容

方便第二次调用其他url时传递参数，例如userCode或者租户编码

调用方式

@Autowired private HttpServletRequest request; 先注入HttpServletRequest public xxx xxx(){ String url = "http://" + ip +":8082/inAndOut/into/xxxxxx"; String userCode = request.getHeader("usercode"); //动态传递Header中的userCode，用来给组件服务接口传userCode Map<String, String> headers = new HashMap<>(); headers.put("Content-Type", "application/json"); headers.put("Authorization", "Bearer your_token_here"); headers.put("tenantcode", tenantCode); headers.put("userCode", userCode); String request = HttpClientUtil.sendGetWithHeaders(url,headers); }

userCode和tenantCode可以从Header中获取，前端也一样，这是在PostMan中测试

工具类

import org.apache.http.HttpEntity; import org.apache.http.HttpHeaders; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import java.io.IOException; import java.util.HashMap; import java.util.Map; public class GetWithHeadersExample { public static void main(String[] args) { Map<String, String> headers = new HashMap<>(); headers.put("Content-Type", "application/json"); headers.put("Authorization", "Bearer your_token_here"); String url = "http://example.com/api/endpoint"; try { String response = sendGetWithHeaders(url, headers); System.out.println("Response: " + response); } catch (IOException e) { e.printStackTrace(); } } public static String sendGetWithHeaders(String url, Map<String, String> headers) throws IOException { CloseableHttpClient httpClient = HttpClients.createDefault(); HttpGet httpGet = new HttpGet(url); for (Map.Entry<String, String> entry : headers.entrySet()) { httpGet.addHeader(entry.getKey(), entry.getValue()); } HttpResponse response = httpClient.execute(httpGet); HttpEntity entity = response.getEntity(); String responseBody = EntityUtils.toString(entity); httpClient.close(); return responseBody; } }