版本升级2.10.1.

1.支付宝转账签名遗漏bug
2.增加http连接池
3.XXE漏洞修复
4.必要的地方增加日志

pay-java-common/src/main/java/com/egzosn/pay/common/http/HttpRequestTemplate.java

@@ -1,6 +1,8 @@
 package com.egzosn.pay.common.http;
 
 import com.egzosn.pay.common.bean.MethodType;
+import com.egzosn.pay.common.bean.result.PayException;
+import com.egzosn.pay.common.exception.PayErrorException;
 import com.egzosn.pay.common.util.str.StringUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -332,11 +334,11 @@ public class HttpRequestTemplate {
         try (CloseableHttpResponse response = getHttpClient().execute(httpRequest)) {
           return httpRequest.handleResponse(response);
         }catch (IOException e){
-            e.printStackTrace();
+           throw new PayErrorException(new PayException("IOException", e.getLocalizedMessage()));
         }finally {
             httpRequest.releaseConnection();
         }
-        return null;
+
     }