Spring - Inserting data using SimpleJdbcInsert

SimpleJdbcInsert wraps JdbcTemplate to simplify the code needed to construct a basic insert statement.

Example

Using SimpleJdbcInsert

@Repository
public class PersonDao implements Dao<Person> {
    @Autowired
    private DataSource dataSource;
    private JdbcTemplate jdbcTemplate;
    private SimpleJdbcInsert jdbcInsert;

    @PostConstruct
    private void postConstruct() {
        jdbcTemplate = new JdbcTemplate(dataSource);
        jdbcInsert = new SimpleJdbcInsert(dataSource)
                .withTableName("PERSON").usingGeneratedKeyColumns("ID");
    }

    @Override
    public void save(Person person) {
        SqlParameterSource parameters = new BeanPropertySqlParameterSource(person);
        jdbcInsert.execute(parameters);
    }
    .............
    @Override
    public List<Person> loadAll() {
        return jdbcTemplate.query("select * from Person", (resultSet, i) -> {
            return toPerson(resultSet);
        });
    }

    private Person toPerson(ResultSet resultSet) throws SQLException {
        Person person = new Person();
        person.setId(resultSet.getLong("ID"));
        person.setFirstName(resultSet.getString("FIRST_NAME"));
        person.setLastName(resultSet.getString("LAST_NAME"));
        person.setAddress(resultSet.getString("ADDRESS"));
        return person;
    }
}

public class Person {
    private long id;
    private String firstName;
    private String lastName;
    private String address;
    .............
}

src/main/resources/createPersonTable.sql

CREATE TABLE PERSON(
ID BIGINT  PRIMARY KEY AUTO_INCREMENT,
FIRST_NAME VARCHAR(255),
LAST_NAME VARCHAR(255),
ADDRESS VARCHAR(255)
);

A client bean

@Component
public class PersonClient {

    @Autowired
    Dao<Person> personDao;

    public void process() {
        Person person = Person.create("Dana", "Whitley", "464 Gorsuch Drive");
        System.out.println("saving: "+person);
        personDao.save(person);

        person = Person.create("Robin", "Cash", "64 Zella Park");
        System.out.println("saving: "+person);
        personDao.save(person);

        List<Person> list = personDao.loadAll();
        System.out.println("Loaded all: " + list);

    }
}

Java Config

@Configuration
@ComponentScan
public class AppConfig {

    @Bean
    public DataSource h2DataSource() {
        return new EmbeddedDatabaseBuilder()
                .setType(EmbeddedDatabaseType.H2)
                .addScript("createPersonTable.sql")
                .build();
    }

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);
        context.getBean(PersonClient.class).process();
    }
}

Output

saving: Person{id=0, firstName='Dana', lastName='Whitley', address='464 Gorsuch Drive'}
saving: Person{id=0, firstName='Robin', lastName='Cash', address='64 Zella Park'}
Loaded all: [Person{id=1, firstName='Dana', lastName='Whitley', address='464 Gorsuch Drive'}, Person{id=2, firstName='Robin', lastName='Cash', address='64 Zella Park'}]

Example Project

Dependencies and Technologies Used:

• spring-context 4.2.3.RELEASE: Spring Context.
• spring-jdbc 4.2.3.RELEASE: Spring JDBC.
• h2 1.4.190: H2 Database Engine.
• JDK 1.8
• Maven 3.0.4