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import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementSetter;
import org.springframework.jdbc.core.ResultSetExtractor;
class Main {
public static void main(String args[]) throws Exception {
ApplicationContext ac = new ClassPathXmlApplicationContext("context.xml", Main.class);
DataSource dataSource = (DataSource) ac.getBean("dataSource");
// DataSource mysqlDataSource = (DataSource) ac.getBean("mysqlDataSource");
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
String firstCustomersName = (String) jdbcTemplate.query(
"select first_name from t_customer where id=?", new PreparedStatementSetter() {
public void setValues(PreparedStatement preparedStatement) throws SQLException {
preparedStatement.setLong(1, 1L);
}
}, new FirstColumnStringExtractor());
System.out.println(firstCustomersName);
}
}
class FirstColumnStringExtractor implements ResultSetExtractor {
public Object extractData(ResultSet resultSet) throws SQLException, DataAccessException {
if (resultSet.next()) {
return resultSet.getString(1);
}
return null;
}
}
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Download: Spring-ImplementsResultSetExtractor.zip( 3,656 k)