CodeGym/Java Course/Module 5. Spring/Using JdbcTemplate

Using JdbcTemplate

Available

The JdbcTemplate and NamedParameterJdbcTemplate classes from Spring are auto-configurable, and you can bind them via the @Autowire annotation directly to their own beans, as shown in the following example:

Java

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
@Component
public class MyBean {
    private final JdbcTemplate jdbcTemplate;
    public MyBean(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
    public void doSomething() {
        this.jdbcTemplate ...
    }
}

Kotlin

import org.springframework.jdbc.core.JdbcTemplate
import org.springframework.stereotype.Component
@Component
class MyBean(private val jdbcTemplate: JdbcTemplate) {
    fun doSomething() {
        jdbcTemplate.execute("delete from customer")
    }
}

You can configure some template properties using the spring.jdbc.template.* properties, as shown in the following example:

Properties

spring.jdbc.template.max-rows=500

Yaml

spring:
  jdbc:
    template:
      max-rows: 500

NamedParameterJdbcTemplate reuses the same JdbcTemplate instance behind the scenes. If more than one JdbcTemplate is defined and there is no primary candidate, the NamedParameterJdbcTemplate will not be automatically configured.