Looking for example using JDBC on DB2 database using Windows authentication, preferably with db2jcc4.jar driver. Seems like a common enough scenario, but I'm having a hard time finding an example.
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Your original question was too vague until you clarified it with a comment asking how to connect to local Db2-databases via jdbc without a userid/password. So your real question appears to be "how do I achieve passwordless authentication to local Db2-databases on MS-Windows?", which may be a FAQ.
Db2-server delegates authentication to the underlying operating-system services on which the Db2-server is running. Keep in mind that Db2-server runs on a few quite-distinct operating systems, only one of which is MS-Windows.
Yes you can connect via-JDBC to a local Db2-database on MS-Windows without specifying a userid/password, using the IBM-supplied jdbc driver.
You can also connect to a local Db2-database on MS-Windows via CLI/ODBC and command-line without specifying a userid/password. When no userid/password is specified then the authentication-ID is that of the currently running session (either the logged on identify, or the
runasidentity).If you have a local Db2-server with a local database running on MS-Windows, then all necessary software is already installed (if using defaults) to achieve the above.
It is important to understand that if the Db2-database is remote from the client then the authentication will need some form of credentials. Such credentials may be in the form of a certificate (if the Db2-database lives on Z/OS), or in the form of a userid/password, or in the form of a kerberos ticket, or in the form of a token used for cloud-based Db2 etc.
For a passwordless local jdbc connection to a Db2-database , you can use the URL format "jdbc:db2:your_database_name" .
The class
com.ibm.db2.jcc.DB2Driver(as supplied in currently supported versions ofdb2jcc4.jar) supports passwordless connections with that URL pattern.Example with local database-name = sample.
The Db2 Knowledge-Centre gives all the details of the available jdbc properties here
https://www.ibm.com/support/knowledgecenter/SSEPGG_11.5.0/com.ibm.db2.luw.apdv.java.doc/src/tpc/imjcc_r0052038.html
Other pages show additional properties that are specific to Z/OS data-sources, or cloud-databases, or i-series data sources, or informix sources etc.