JAVA利用HttpClient進行POST請求（HTTPS）

目前，要爲另一個項目提供接口，接口是用HTTP URL實現的，最初的想法是另一個項目用jQuery post進行請求。

但是，很可能另一個項目是部署在別的機器上，那麼就存在跨域問題，而JQuery的post請求是不允許跨域的。

這時，就只能夠用HttpClient包進行請求了，同時由於請求的URL是HTTPS的，爲了避免需要證書，所以用一個類繼承DefaultHttpClient類，忽略校驗過程。

1.寫一個SSLClient類，繼承至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;
//用於進行Https請求的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.寫一個利用HttpClient發送post請求的類

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進行post請求的工具類
 */
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);
            //設置參數
            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.調用post請求的測試代碼

import java.util.HashMap;
import java.util.Map;
//對接口進行測試
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包下載路徑：http://download.csdn.net/detail/hqmryang/4582440#comment