超详细HttpClient加载安全证书post请求访问https示例

超详细HttpClient加载安全证书post请求访问https示例

(注：此测试java版本为1.7，经过测试java7以上(不含java7)的版本无需加载安全证书，也无需绕过安全证书就可以通过建立httpClient连接访问https网站，所以如果项目环境为Java7以上的小伙伴就不用考虑这些问题啦。)

最近公司爬虫项目因为一个网站的SSL证书升级问题，导致使用httpClient绕过SSL证书方法失效，因此尝试将该网站安全证书下载下来，将其加载到连接中去，经测试后成功问题解决。

• 浏览器(以chrome为例)访问https://www.apapanet.com/，点击域名左侧的小锁，可以查看该网站的证书信息，将信息证书导出，我这里保存为cer格式，路径为D:\Java\apapanet.cer。
  
• 接下来就是代码了，代码如下：

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class httpClient{
     
	public static void main(String[] args) throws Exception {
     
		// Load Certificate
		CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
		// 这里的路径为证书存放路径
		Certificate certificate = certificateFactory.generateCertificate(new FileInputStream("D:\\Java\\apapanet.cer"));
		
		// Create TrustStore
		KeyStore trustStoreContainingTheCertificate = KeyStore.getInstance("JKS");
		trustStoreContainingTheCertificate.load(null, null);
		
		// AddCertificate	第一个参数为证书别名, 可以任取
		trustStoreContainingTheCertificate.setCertificateEntry("XYZ", certificate);
		TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); 
		trustManagerFactory.init(trustStoreContainingTheCertificate);
		
		// Create SSLContext	我这里协议为TLSv1.2
        SSLContext sslContext = SSLContext.getInstance("TLSv1.2");
        sslContext.init(null,trustManagerFactory.getTrustManagers(),null);
        SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext);
        
        // Create custom httpClient	创建自定义httpClient连接
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory).build(); 
        try
        {
     	
        	// POST请求
        	HttpPost method = new HttpPost("https://www.apapanet.com/");
            System.out.println("executing request" + method.getRequestLine());
            method.setHeader("Content-type", "application/json;charset=utf-8");
    		method.setHeader("Accept", "application/json");
    		CloseableHttpResponse response = null;
            	response = httpClient.execute(method);
    			int status = response.getStatusLine().getStatusCode();
    			if (status == HttpStatus.SC_OK) {
     
    				String body = EntityUtils.toString(response.getEntity());
    				if(StringUtils.isNotBlank(body)){
     
    					System.out.println("body: "+body);
    				}
    			}
            
                response.close();
        } finally {
     
            httpClient.close();
        }
	}
}

• 测试通过成功返回页面数据~~