JAVA利用HttpClient进行POST请求（HTTPS）

Posted 2022-04-20 rongyongfeikai2

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

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
//用于进行Https请求的HttpClient
public class SSLClient extends DefaultHttpClient
	public SSLClient() throws Exception
        super();
        SSLContext ctx = SSLContext.getInstance("TLS");
        X509TrustManager tm = new X509TrustManager() 
                @Override
                public void checkClientTrusted(X509Certificate[] chain,
                        String authType) throws CertificateException 
                
                @Override
                public void checkServerTrusted(X509Certificate[] chain,
                        String authType) throws CertificateException 
                
                @Override
                public X509Certificate[] getAcceptedIssuers() 
                    return null;
                
        ;
        ctx.init(null, new TrustManager[]tm, null);
        SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        ClientConnectionManager ccm = this.getConnectionManager();
        SchemeRegistry sr = ccm.getSchemeRegistry();
        sr.register(new Scheme("https", 443, ssf));
    

2.写一个利用HttpClient发送post请求的类

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/*
 * 利用HttpClient进行post请求的工具类
 */
public class HttpClientUtil 
	public String doPost(String url,Map<String,String> map,String charset)
		HttpClient httpClient = null;
		HttpPost httpPost = null;
		String result = null;
		try
			httpClient = new SSLClient();
			httpPost = new HttpPost(url);
			//设置参数
			List<NameValuePair> list = new ArrayList<NameValuePair>();
			Iterator iterator = map.entrySet().iterator();
			while(iterator.hasNext())
				Entry<String,String> elem = (Entry<String, String>) iterator.next();
				list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));
			
			if(list.size() > 0)
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,charset);
				httpPost.setEntity(entity);
			
			HttpResponse response = httpClient.execute(httpPost);
			if(response != null)
				HttpEntity resEntity = response.getEntity();
				if(resEntity != null)
					result = EntityUtils.toString(resEntity,charset);
				
			
		catch(Exception ex)
			ex.printStackTrace();
		
		return result;
	

3.调用post请求的测试代码

import java.util.HashMap;
import java.util.Map;
//对接口进行测试
public class TestMain 
	private String url = "https://192.168.1.101/";
	private String charset = "utf-8";
	private HttpClientUtil httpClientUtil = null;
	
	public TestMain()
		httpClientUtil = new HttpClientUtil();
	
	
	public void test()
		String httpOrgCreateTest = url + "httpOrg/create";
		Map<String,String> createMap = new HashMap<String,String>();
		createMap.put("authuser","*****");
		createMap.put("authpass","*****");
		createMap.put("orgkey","****");
		createMap.put("orgname","****");
		String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset);
		System.out.println("result:"+httpOrgCreateTestRtn);
	
	
	public static void main(String[] args)
		TestMain main = new TestMain();
		main.test();
	

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