JAVA利用HttpClient进行POST请求（HTTPS）

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