JAVA利用HttpClient进行POST请求（HTTPS）

╰半夏微凉° 2022-05-27 08:52 309阅读 0赞

# 目前，要为另一个项目提供接口，接口是用HTTP URL实现的，最初的想法是另一个项目用JQuery post进行请求。 #

但是，很可能另一个项目是部署在别的机器上，那么就存在跨域问题，而JQuery的post请求是不允许跨域的。

这时，就只能够用HttpClient包进行请求了，同时由于请求的URL是HTTPS的，为了避免需要证书，所以用一个类继承DefaultHttpClient类，忽略校验过程。

1.写一个SSLClient类，继承至HttpClient

**\[java\]**  [view plain][]  [copy][view plain]

1.  import java.security.cert.CertificateException;  
2.  import java.security.cert.X509Certificate;  
3.  import javax.net.ssl.SSLContext;  
4.  import javax.net.ssl.TrustManager;  
5.  import javax.net.ssl.X509TrustManager;  
6.  import org.apache.http.conn.ClientConnectionManager;  
7.  import org.apache.http.conn.scheme.Scheme;  
8.  import org.apache.http.conn.scheme.SchemeRegistry;  
9.  import org.apache.http.conn.ssl.SSLSocketFactory;  
10. import org.apache.http.impl.client.DefaultHttpClient;  
11. //用于进行Https请求的HttpClient  
12. public class SSLClient extends DefaultHttpClient\{  
13.     public SSLClient() throws Exception\{  
14.         super();  
15.         SSLContext ctx = SSLContext.getInstance("TLS");  
16.         X509TrustManager tm = new X509TrustManager() \{  
17.                 @Override  
18.                 public void checkClientTrusted(X509Certificate\[\] chain,  
19.                         String authType) throws CertificateException \{  
20.                 \}  
21.                 @Override  
22.                 public void checkServerTrusted(X509Certificate\[\] chain,  
23.                         String authType) throws CertificateException \{  
24.                 \}  
25.                 @Override  
26.                 public X509Certificate\[\] getAcceptedIssuers() \{  
27.                     return null;  
28.                 \}  
29.         \};  
30.         ctx.init(null, new TrustManager\[\]\{tm\}, null);  
31.         SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW\_ALL\_HOSTNAME\_VERIFIER);  
32.         ClientConnectionManager ccm = this.getConnectionManager();  
33.         SchemeRegistry sr = ccm.getSchemeRegistry();  
34.         sr.register(new Scheme("https", 443, ssf));  
35.     \}  
36. \}

2.写一个利用HttpClient发送post请求的类

**\[java\]**  [view plain][]  [copy][view plain]

1.  import java.util.ArrayList;  
2.  import java.util.Iterator;  
3.  import java.util.List;  
4.  import java.util.Map;  
5.  import java.util.Map.Entry;  
6.  import org.apache.http.HttpEntity;  
7.  import org.apache.http.HttpResponse;  
8.  import org.apache.http.NameValuePair;  
9.  import org.apache.http.client.HttpClient;  
10. import org.apache.http.client.entity.UrlEncodedFormEntity;  
11. import org.apache.http.client.methods.HttpPost;  
12. import org.apache.http.message.BasicNameValuePair;  
13. import org.apache.http.util.EntityUtils;  
14. /\* 
15.  \* 利用HttpClient进行post请求的工具类 
16.  \*/  
17. public class HttpClientUtil \{  
18.     public String doPost(String url,Map<String,String> map,String charset)\{  
19.         HttpClient httpClient = null;  
20.         HttpPost httpPost = null;  
21.         String result = null;  
22.         try\{  
23.             httpClient = new SSLClient();  
24.             httpPost = new HttpPost(url);  
25.             //设置参数  
26.             List<NameValuePair> list = new ArrayList<NameValuePair>();  
27.             Iterator iterator = map.entrySet().iterator();  
28.             while(iterator.hasNext())\{  
29.                 Entry<String,String> elem = (Entry<String, String>) iterator.next();  
30.                 list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));  
31.             \}  
32.             if(list.size() > 0)\{  
33.                 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,charset);  
34.                 httpPost.setEntity(entity);  
35.             \}  
36.             HttpResponse response = httpClient.execute(httpPost);  
37.             if(response != null)\{  
38.                 HttpEntity resEntity = response.getEntity();  
39.                 if(resEntity != null)\{  
40.                     result = EntityUtils.toString(resEntity,charset);  
41.                 \}  
42.             \}  
43.         \}catch(Exception ex)\{  
44.             ex.printStackTrace();  
45.         \}  
46.         return result;  
47.     \}  
48. \}

3.调用post请求的测试代码

**\[java\]**  [view plain][]  [copy][view plain]

1.  import java.util.HashMap;  
2.  import java.util.Map;  
3.  //对接口进行测试  
4.  public class TestMain \{  
5.      private String url = "https://192.168.1.101/";  
6.      private String charset = "utf-8";  
7.      private HttpClientUtil httpClientUtil = null;  
8.        
9.      public TestMain()\{  
10.         httpClientUtil = new HttpClientUtil();  
11.     \}  
12.       
13.     public void test()\{  
14.         String httpOrgCreateTest = url + "httpOrg/create";  
15.         Map<String,String> createMap = new HashMap<String,String>();  
16.         createMap.put("authuser","\*\*\*\*\*");  
17.         createMap.put("authpass","\*\*\*\*\*");  
18.         createMap.put("orgkey","\*\*\*\*");  
19.         createMap.put("orgname","\*\*\*\*");  
20.         String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset);  
21.         System.out.println("result:"\+httpOrgCreateTestRtn);  
22.     \}  
23.       
24.     public static void main(String\[\] args)\{  
25.         TestMain main = new TestMain();  
26.         main.test();  
27.     \}  
28. \}

httpClient4.2的jar包下载路径：http://download.csdn.net/detail/hqmryang/4582440\#commen

[view plain]: https://blog.csdn.net/rongyongfeikai2/article/details/41659353/#