还没到登录，在下载验证码的时候已经报异常了，代码如下：

import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class XiaMen_IS
{

	public static void main(String[] args)
	{
		crawler();
	}

	// 信息抓取
	public static void crawler()
	{
		try
		{

			CloseableHttpClient cbHttpClient = createSSLInsecureClient();
			getVerficationCode(cbHttpClient);
		} catch (Exception e)
		{
			System.out.println("---厦门社保抓取失败---");
		}
	}

	// 获取验证码
	private static String getVerficationCode(CloseableHttpClient cbHttpClient) throws Exception
	{
		try
		{
			String url = "https://app.xmhrss.gov.cn/wcm/servlet/VCodeServlet";// 验证码地址
			HttpGet get = new HttpGet(url);
			HttpResponse response = cbHttpClient.execute(get);// 报异常
			// 获取验证码字节数组
			byte data[] = EntityUtils.toByteArray(response.getEntity());

		} catch (Exception e)
		{
			System.out.println("厦门社保下载验证码异常:");
			e.printStackTrace();
			throw e;
		}

		return null;
	}

	// client工具函数，信任对方（https）所有证书
	public static CloseableHttpClient createSSLInsecureClient()
	{
		try
		{
			// 创建安全套接字对象
			SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy()
			{
				// 信任所有
				public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException
				{
					return true;
				}
			}).build();
			// 获取分层tls/ssl连接
			SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);
			return HttpClients.custom().setSSLSocketFactory(sslsf).build();
		} catch (KeyManagementException e)
		{
			e.printStackTrace();
		} catch (NoSuchAlgorithmException e)
		{
			e.printStackTrace();
		} catch (KeyStoreException e)
		{
			e.printStackTrace();
		}
		return HttpClients.createDefault();
	}

}

将
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);
改为
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext,new String[] {“SSLv3”}, null, SSLConnectionSocketFactory.getDefaultHostnameVerifier());

亲测已经可以把验证码下载下来了。

引用 2 楼 chenjing0320 的回复:

将
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);
改为
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext,new String[] {“SSLv3”}, null, SSLConnectionSocketFactory.getDefaultHostnameVerifier());

亲测已经可以把验证码下载下来了。

报语法错误

引用 3 楼 liangtu33 的回复:

Quote: 引用 2 楼 chenjing0320 的回复:

将
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);
改为
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext,new String[] {“SSLv3”}, null, SSLConnectionSocketFactory.getDefaultHostnameVerifier());

亲测已经可以把验证码下载下来了。

报语法错误

httpclient用的什么版本？
我用4.4运行的，org.apache.http.conn.ssl.SSLConnectionSocketFactory。

httpclient-4.3.4.jar

我又下了个httpclient-4.3.4.jar

改成
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext,new String[] {“SSLv3”}, null, null);
就可以了啊