轻松把玩HttpClient之配置ssl，采用绕过证书验证实现https

上篇文章说道httpclient不能直接访问https的资源，这次就来模拟一下环境，然后配置https测试一下。在前面的文章中，分享了一篇自己生成并在tomcat中配置ssl的文章《Tomcat配置SSL》，大家可以据此来在本地配置https。我已经配置好了，效果是这样滴：



可以看到已经信任该证书（显示浅绿色小锁），浏览器可以正常访问。现在我们用代码测试一下：

public static void main(String[] args) throws ParseException, IOException, KeyManagementException, NoSuchAlgorithmException, HttpProcessException {

String url = "https://sso.tgb.com:8443/cas/login";

String body = send(url, null, "utf-8");

System.out.println("交易响应结果：");

System.out.println(body);

System.out.println("-----------------------------------");

}



发现抛出了异常，我知道的有两种方案（也许还有我不知道的方案），这里介绍第一种方案，也是用的比较多的方案——绕过证书验证。直接看代码吧：

/**

* 绕过验证

*

* @return

* @throws NoSuchAlgorithmException

* @throws KeyManagementException

*/

public static SSLContext createIgnoreVerifySSL() throws NoSuchAlgorithmException, KeyManagementException {

SSLContext sc = SSLContext.getInstance("SSLv3");

// 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法

X509TrustManager trustManager = new X509TrustManager() {

@Override

public void checkClientTrusted(

java.security.cert.X509Certificate[] paramArrayOfX509Certificate,

String paramString) throws CertificateException {

}

@Override

public void checkServerTrusted(

java.security.cert.X509Certificate[] paramArrayOfX509Certificate,

String paramString) throws CertificateException {

}

@Override

public java.security.cert.X509Certificate[] getAcceptedIssuers() {

return null;

}

};

sc.init(null, new TrustManager[] { trustManager }, null);

return sc;

}

然后修改原来的send方法：

/**

* 模拟请求

*

* @param url 资源地址

* @param map 参数列表

* @param encoding 编码

* @return

* @throws NoSuchAlgorithmException

* @throws KeyManagementException

* @throws IOException

* @throws ClientProtocolException

*/

public static String send(String url, Map<String,String> map,String encoding) throws KeyManagementException, NoSuchAlgorithmException, ClientProtocolException, IOException {

String body = "";

//采用绕过验证的方式处理https请求

SSLContext sslcontext = createIgnoreVerifySSL();

// 设置协议http和https对应的处理socket链接工厂的对象

Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()

.register("http", PlainConnectionSocketFactory.INSTANCE)

.register("https", new SSLConnectionSocketFactory(sslcontext))

.build();

PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);

HttpClients.custom().setConnectionManager(connManager);

//创建自定义的httpclient对象

CloseableHttpClient client = HttpClients.custom().setConnectionManager(connManager).build();

/ CloseableHttpClient client = HttpClients.createDefault();

//创建post方式请求对象

HttpPost httpPost = new HttpPost(url);

//装填参数

List<NameValuePair> nvps = new ArrayList<NameValuePair>();

if(map!=null){

for (Entry<String, String> entry : map.entrySet()) {

nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));

}

}

//设置参数到请求对象中

httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));

System.out.println("请求地址："+url);

System.out.println("请求参数："+nvps.toString());

//设置header信息

//指定报文头【Content-type】、【User-Agent】

httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");

httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

//执行请求操作，并拿到结果（同步阻塞）

CloseableHttpResponse response = client.execute(httpPost);

//获取结果实体

HttpEntity entity = response.getEntity();

if (entity != null) {

//按指定编码转换结果实体为String类型

body = EntityUtils.toString(entity, encoding);

}

EntityUtils.consume(entity);

//释放链接

response.close();

return body;

}

现在再进行测试，发现果然通了。



下篇介绍另一种方案，应对自己生成的证书，敬请期待。

转自 http://blog.csdn.net/xiaoxian8023