【Java】通过 Httpclient 发送 GET and POST请求

悠悠 2023-10-17 09:59 43阅读 0赞

通过 Httpclient 发送 GET and POST请求

  1. /**
  2.  * Created by CF on 2017/1/6.
  3.  */
  4. import java.io.IOException;
  5. import java.io.UnsupportedEncodingException;
  6. import java.util.ArrayList;
  7. import java.util.List;
  9. import org.apache.http.HttpEntity;
  10. import org.apache.http.NameValuePair;
  11. import org.apache.http.client.entity.UrlEncodedFormEntity;
  12. import org.apache.http.client.methods.CloseableHttpResponse;
  13. import org.apache.http.client.methods.HttpGet;
  14. import org.apache.http.client.methods.HttpPost;
  15. import org.apache.http.impl.client.CloseableHttpClient;
  16. import org.apache.http.impl.client.HttpClients;
  17. import org.apache.http.message.BasicNameValuePair;
  18. import org.apache.http.util.EntityUtils;
  19. import org.springframework.beans.factory.annotation.Value;
  21. public class HttpRequestUtils {
  23.     //成功
  24.     private static  boolean TYPE=true;
  25.     @Value("${base.web.url}")
  26.     private static  String serverHost;
  27.     /**
  28.      * 通过GET方式发起http请求
  29.      */
  30.     public static boolean requestByGetMethod(String url){
  32.         //创建默认的httpClient实例
  33.         CloseableHttpClient httpClient = getHttpClient();
  34.         try {
  36.             //用get方法发送http请求
  37.             HttpGet get = new HttpGet(url);
  38.             System.out.println("执行get请求:...."+get.getURI());
  39.             CloseableHttpResponse httpResponse = null;
  40.             //发送get请求
  41.             httpResponse = httpClient.execute(get);
  42.             try{
  44.                 //response实体
  45.                 HttpEntity entity = httpResponse.getEntity();
  46.                 if (null != entity){
  48.                     System.out.println("响应状态码:"+ httpResponse.getStatusLine());
  49.                     System.out.println("-------------------------------------------------");
  50.                     System.out.println("响应内容:" + EntityUtils.toString(entity));
  51.                     System.out.println("-------------------------------------------------");
  52.                 }
  53.             }
  54.             finally{
  56.                 httpResponse.close();
  57.             }
  58.         } catch (Exception e) {
  60.             e.printStackTrace();//TODO
  61.             return  TYPE=false;
  62.         }
  63.         finally{
  65.             try{
  67.                 closeHttpClient(httpClient);
  68.             } catch (IOException e){
  70.                 e.printStackTrace();
  71.             }
  72.         }
  73.         return  TYPE;
  74.     }
  79.     /**
  80.      * POST方式发起http请求
  81.      */
  82.     public static boolean requestByPostMethod(String url){
  84.         CloseableHttpClient httpClient = getHttpClient();
  85.         try {
  87.             HttpPost post = new HttpPost(url);          //这里用上本机的某个工程做测试
  88.             //创建参数列表
  89.             List<NameValuePair> list = new ArrayList<NameValuePair>();
  90.             list.add(new BasicNameValuePair("j_username", "admin"));
  91.             list.add(new BasicNameValuePair("j_password", "admin"));
  92.             //url格式编码
  93.             UrlEncodedFormEntity uefEntity = new UrlEncodedFormEntity(list,"UTF-8");
  94.             post.setEntity(uefEntity);
  95.             System.out.println("POST 请求...." + post.getURI());
  96.             //执行请求
  97.             CloseableHttpResponse httpResponse = httpClient.execute(post);
  98.             try{
  100.                 HttpEntity entity = httpResponse.getEntity();
  101.                 if (null != entity){
  103.                     System.out.println("-------------------------------------------------------");
  104.                     System.out.println(EntityUtils.toString(uefEntity));
  105.                     System.out.println("-------------------------------------------------------");
  106.                 }
  107.             } finally{
  109.                 httpResponse.close();
  110.             }
  112.         } catch( UnsupportedEncodingException e){
  114.             e.printStackTrace();
  115.             return  TYPE=false;//TODO
  116.         }
  117.         catch (IOException e) {
  119.             e.printStackTrace();
  120.         }
  121.         finally{
  123.             try{
  125.                 closeHttpClient(httpClient);
  126.             } catch(Exception e){
  128.                 e.printStackTrace();
  129.             }
  130.         }
  131.         return  TYPE;
  132.     }
  134.     private static CloseableHttpClient getHttpClient(){
  136.         return HttpClients.createDefault();
  137.     }
  139.     private static void closeHttpClient(CloseableHttpClient client) throws IOException{
  141.         if (client != null){
  143.             client.close();
  144.         }
  145.     }
  147.     public static void main(String[] args) {
  149.        boolean a= requestByGetMethod("http://192.168.2.163:8999/");
  150.         System.out.print("a = " + a);
  151.     }
  152.     }

maven配置：

  1. <dependency>
  2.     <groupId>org.apache.httpcomponents</groupId>
  3.     <artifactId>httpclient</artifactId>
  4.     <version>4.3.5</version>
  5. </dependency>

发表评论

表情：
评论列表 （有 0 条评论，43人围观）

还没有评论，来说两句吧...

相关阅读