HttpClient POST请求第三方接口问题(多参数传参)
作者：郭优秀的笔记
这篇文章主要介绍了HttpClient POST请求第三方接口问题(多参数传参)，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教
HttpClient POST请求第三方接口
HttpClient 是Apache Jakarta Common 下的子项目，可以用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包，并且它支持 HTTP 协议最新的版本和建议。
在开发中经常遇到和第三方公司接口对接，需要拿到对方提供的数据或者是给对方提供，下面给大家提供一个自己写的demo，本地测试有效，利用post请求传参访问 ，希望可以帮到你
package test;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
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.HttpClients;
import org.apache.http.util.EntityUtils;
import com.alibaba.fastjson.JSONObject;
public class InterfaceRequest {
public static void main(String[] args) {
String url = "https://www.jianliyisheng.com/api/site/getprovincedata";
HttpClient client = HttpClients.createDefault();
//默认post请求
HttpPost post = new HttpPost(url);
//拼接多参数
JSONObject json = new JSONObject();
json.put("uid", "79");
json.put("key", "d86e33fb43036df9f9c29ff8085ac653");
json.put("timestamp", "1562296283");
json.put("typekey", "wshh");
try {
post.addHeader("Content-type", "application/json; charset=utf-8");
post.setHeader("Accept", "application/json");
post.setEntity(new StringEntity(json.toString(), Charset.forName("utf-8")));
HttpResponse httpResponse = client.execute(post);
HttpEntity entity = httpResponse.getEntity();
System.err.println("状态:" + httpResponse.getStatusLine());
System.err.println("参数:" + EntityUtils.toString(entity));
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}使用httpclient请求第三方接口并携带cookie和参数
在实际开发中，经常会碰到需要请求第三方接口的情况，这种接口往往都需要先获取其身份验证标识，以此验证是否有权限访问这个接口。
最近我遇到这种情况，需要先获取到cookie，然后携带cookie及参数一起请求第三方接口，网络上有许多方法，这里是根据我自己的实际需求编写的代码。
依赖
<dependency> <groupId>commons-httpclient</groupId> <artifactId>commons-httpclient</artifactId> <version>3.1</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpmime</artifactId> <version>4.5.10</version> </dependency>
获取cookie
这里我的情况是每一个小时cookie就会失效，所有后端需要写一个定时任务每50分钟获取一次cookie，
获取cooike的方法：
public static String userLogin(String loginUrl, String name, String password) {
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(loginUrl);
NameValuePair[] data = {new NameValuePair("username", name),
new NameValuePair("password", password)};
postMethod.setRequestBody(data);
try {
httpClient.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
int statusCode = httpClient.executeMethod(postMethod);
// 获取 Cookie
Cookie[] cookies = httpClient.getState().getCookies();
String cookie = null;
for (Cookie c : cookies) {
//筛选想要的cookie
}
return cookie;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}get请求携带cookie及参数
get请求比较简单易懂，参数数据可以直接添加在请求地址中
/**
* get请求并携带cookie
* @param url
* @return
*/
public static String doGet(String url) {
try {
//创建get请求
HttpGet httpGet = new HttpGet(url);
httpGet.addHeader(new BasicHeader("cookie", UserTask.cookie));
httpGet.setHeader("Connection", "keep-alive");
HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
CloseableHttpClient httpClient = httpClientBuilder.build();
HttpResponse httpResponse = httpClient.execute(httpGet);
// 响应状态
if (httpResponse.getStatusLine().getStatusCode() == 200) {
HttpEntity entity = httpResponse.getEntity();
return EntityUtils.toString(entity, "UTF-8");
}
} catch (Exception e) {
e.printStackTrace();
}
return “Error”;
}post请求携带cookie及参数
post请求相对复杂一点，这里又分为两种，一种为JSON数据，一种为表单格式，获取cookie使用的就是类似表单格式的处理，这里讨论的是用的较多的JSON格式，就是第三方接口需要的参数格式为JSON。
/**
* post请求并携带cookie
* @param url
* @param json
* @return
*/
public static String doPostJson(String url, String json) {
System.out.println(json);
// 创建Httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
try {
// 创建Post请求
HttpPost httpPost = new HttpPost(url);
httpPost.addHeader(new BasicHeader("cookie", UserTask.cookie));
httpPost.setHeader("Connection", "keep-alive");
StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
httpPost.setEntity(entity);
response = httpClient.execute(httpPost);
if (response.getStatusLine().getStatusCode() == 200) {
return EntityUtils.toString(response.getEntity(), "utf-8");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return "Error";
}总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。