配置微信证书，申请退款

import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
 
import javax.net.ssl.SSLContext;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
 
/**
 * 获取微信apiclient_cert.p12证书
 *
 * @author zengwei
 * @email [email protected]
 * @date 2018年4月5日 下午4:49:36
 */
@SuppressWarnings("deprecation")
public class CertHttpUtil {
 
    private static int socketTimeout = 10000;// 连接超时时间，默认10秒
    private static int connectTimeout = 30000;// 传输超时时间，默认30秒
    private static RequestConfig requestConfig;// 请求器的配置
    private static CloseableHttpClient httpClient=null;// HTTP请求器
   
    /**
     * 通过Https往API post xml数据
     *
     * @param url API地址
     * @param xmlObj 要提交的XML数据对象
     * @param mchId 商户ID
     * @param certPath 证书位置
     * @return
     */
    public static String postData(String url, String xmlObj, String mchId, String certPath) {
        // 加载证书
        try {
        	//if(httpClient==null) {
        		CertHttpUtil certHttpUtil=new CertHttpUtil();
            	certHttpUtil.initCert(mchId, certPath);
        	//}
        	
        } catch (Exception e) {
            e.printStackTrace();
        }
        String result = null;
        HttpPost httpPost = new HttpPost(url);
        // 得指明使用UTF-8编码，否则到API服务器XML的中文不能被成功识别
        StringEntity postEntity = new StringEntity(xmlObj, "UTF-8");
        httpPost.addHeader("Content-Type", "text/xml");
        httpPost.setEntity(postEntity);
        // 根据默认超时限制初始化requestConfig
        requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();
        // 设置请求器的配置
        httpPost.setConfig(requestConfig);
        try {
            HttpResponse response = null;
            try {
                response = httpClient.execute(httpPost);
            } catch (IOException e) {
                e.printStackTrace();
            }
            HttpEntity entity = response.getEntity();
            try {
                result = EntityUtils.toString(entity, "UTF-8");
            } catch (IOException e) {
                e.printStackTrace();
            }
        } finally {
            httpPost.abort();
        }
        return result;
    }
 
    /**
     * 加载证书
     *
     * @param mchId 商户ID
     * @param certPath 证书位置
     * @throws Exception
     */
    private void initCert(String mchId, String certPath) throws Exception {
    	
	        // 证书密码，默认为商户ID
	        String key = mchId;
	       
	        // 指定读取证书格式为PKCS12
	        KeyStore keyStore = KeyStore.getInstance("PKCS12");
	        // 读取本机存放的PKCS12证书文件
	        InputStream inputStream =  this.getClass().getResourceAsStream(certPath);
	        try {
	            // 指定PKCS12的密码(商户ID)
	            keyStore.load(inputStream, key.toCharArray());
	        } finally {
	        	inputStream.close();
	        }
	        SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, key.toCharArray()).build();
	        SSLConnectionSocketFactory sslsf =
	                new SSLConnectionSocketFactory(sslcontext, new String[] {"TLSv1"}, null,
	                        SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
	        httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
    	
    }
}