When using JdbcTemplate to execute SQL queries, it can be configured to print SQL statements for debugging and query optimization. Here are some ways to set JdbcTemplate to print SQL statements:
Use Log4j to print SQL statements
If you use Log4j as the logging framework, you can add the following configuration to the log4j.properties or log4j.xml file to output the SQL statement printed by JdbcTemplate to the console or log file:
log4j.logger.org.springframework.jdbc.core.JdbcTemplate=DEBUG
This will set the log level of JdbcTemplate to DEBUG, causing it to print SQL statements.
Use Logback to print SQL statements
If you use Logback as the log framework, you can add the following configuration to the logback.xml file to output the SQL statement printed by JdbcTemplate to the console or log file:
<configuration>
<logger name="org.springframework.jdbc.core.JdbcTemplate" level="DEBUG" />
</configuration>
This will set the log level of JdbcTemplate to DEBUG, causing it to print SQL statements.
Print SQL statements using Spring Boot
If you use Spring Boot, you can add the following configuration to the application.properties or application.yml file to output the SQL statement printed by JdbcTemplate to the console or log file:
logging.level.org.springframework.jdbc.core.JdbcTemplate=DEBUG
This will set the log level of JdbcTemplate to DEBUG, causing it to print SQL statements.
Whichever method you use, you can set the JdbcTemplate to print SQL statements for debugging and query optimization. It should be noted that printing SQL statements may affect the performance of the application, so this function should be disabled in the production environment.