Java에서 SQL Server DB 연동 오류 2 :"encrypt" 속성이 "true"(으)로 설정되고 "trustServerCertificate" 속성이 "false"(으)로 설정되었지만 드라이버가 SSL(Secure Sockets Layer) 암호화~~

jar파일 버전을 낮춘 후 다시 DB접속을 시도했으나 이번엔 다음과 같은 오류가 발생했다. ㅠㅠ

원인 : 서버에서 인증서 유효성을 확인할 수 없음
해결 : datasource 마지막 줄에 신뢰 유효성을 확인하기 위한 인증서 검사 무시 여부를 true로 설정
SQLServerDataSource ds = new SQLServerDataSource();
ds.set ~~~
ds.setTrustServerCertificate(true);
https://learn.microsoft.com/ko-kr/dotnet/api/microsoft.data.sqlclient.sqlconnectionstringbuilder.trustservercertificate?view=sqlclient-dotnet-standard-5.1

SqlConnectionStringBuilder.TrustServerCertificate 속성 (Microsoft.Data.SqlClient)

Exception in thread "main" com.microsoft.sqlserver.jdbc.SQLServerException: "encrypt" 속성이 "true"(으)로 설정되고 "trustServerCertificate" 속성이 "false"(으)로 설정되었지만 드라이버가 SSL(Secure Sockets Layer) 암호화를 사용하여 SQL Server에 대한 보안 연결을 설정할 수 없습니다. 오류: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target. ClientConnectionId:14656c10-20ff-4388-924f-fba7692ec81e
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:4026)
        at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1954)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:3552)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:3172)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:3014)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:1836)
        at com.microsoft.sqlserver.jdbc.SQLServerDataSource.getConnectionInternal(SQLServerDataSource.java:1489)
        at com.microsoft.sqlserver.jdbc.SQLServerDataSource.getConnection(SQLServerDataSource.java:99)
        at database.SQLServerLMSDbConn.getConnection(SQLServerLMSDbConn.java:20)
        at database.DBConnectionFactory.<init>(DBConnectionFactory.java:15)
        at database.Main.main(Main.java:21)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
        at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1497)
        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:212)
        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
        at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
        at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1843)
        ... 9 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
        at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
        at sun.security.validator.Validator.validate(Validator.java:260)
        at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:105)
        at com.microsoft.sqlserver.jdbc.HostNameOverrideX509TrustManager.checkServerTrusted(SQLServerTrustManager.java:88)
        at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:922)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1479)
        ... 17 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
        at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
        ... 25 more