用1.18连接没有问题，用2.3连接就报错，如下：
The driver could not establish a secure connection to SQL Server by using Secure Sockets Layer (SSL) encryption. Error: “PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target”. ClientConnectionId:418610cd-11f4-425f-ae37-2807419186e4