使用httpClient发送https消息

写作缘由

网上使用httpClient发送https消息的帖子已经很多，方法各有不同。作者在开发中需要使用java代码实现发送https消息，发现大多方法都报“需要加载证书”的错误，经过陆续的筛选，发现其中一个帖子方法可行，于是搬运到这里，供后续查看，此处非原创，请各位适当查看。

httpClient类的创建

目前诸多方法中，只有DefaultHttpClient 方法可以绕过证书实现发送https消息，代码如下

import org.apache.http.impl.client.DefaultHttpClient;
import javax.net.ssl.SSLContext;
import java.security.cert.X509Certificate;
import java.security.cert.CertificateException;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.scheme.Scheme;

@SuppressWarnings("deprecation")
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));
    }
}

该方法中继承了 DefaultHttpClient 方法，可以绕过证书，目前是发送https消息的不二之选

创建post方法

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.message.BasicHeader;
import org.apache.http.util.EntityUtils;
public class HttpClientUtil {

	public static String doPost(String url,String jsonstr,String charset){
        HttpClient httpClient = null;
        HttpPost httpPost = null;
        String result = null;
        try{
            httpClient = new SSLClient();
        	//httpClient = HttpClient01.createSSLClientDefault();
            httpPost = new HttpPost(url);
            httpPost.addHeader("Content-Type", "application/json");
            StringEntity se = new StringEntity(jsonstr);
            se.setContentType("text/json");
            se.setContentEncoding(new BasicHeader("Content-Type", "application/json"));
            httpPost.setEntity(se);
            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;
    }
}

http协议有很多方法，其中用的最多的是post方法，此处举例。

 

调用点

String httpOrgCreateTestRtn = HttpClientUtil.doPost(url, jsonStr, "utf-8");

url为http地址，jsonStr为json格式字符串

 

参考处

https://www.cnblogs.com/luchangyou/p/6375166.html