java examples
Home Java Examples Resources Java Interview Questions
Brainpower SEO

How to select records from database using JdbcTemplate?

In this example you will learn how to select records from the database using JdbcTemplate.queryForList() method. This method returns a List object which stores information selected from the table in a HashMap object. The key of the map is the table's field names while the value of the map contains the corresponding table's field value.

package com.javacoderanch.example.spring.jdbc;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import java.util.HashMap;
import java.util.List;

public class SpringJdbcSelectDemo {
    public static void main(String[] args) {
        // Creates a DataSource object.
        DriverManagerDataSource ds = new DriverManagerDataSource();

        // Creates an instance of JdbcTemplate.
        JdbcTemplate template = new JdbcTemplate(ds);

        // Executes a select query using queryForList() method. This
        // method returns a List containing HashMap object. The key
        // of the map is the table's field name and the value is
        // the table's field value.
        String query = "SELECT id, first_name, last_name FROM students";
        List results = template.queryForList(query);
        for (Object result : results) {
            HashMap map = (HashMap) result;
            for (Object key : map.keySet()) {
                System.out.println("key = " + key);
                System.out.println("val = " + map.get(key));