Spring + JdbcTemplate + Custom RowMapper example | Spring JDBC tutorial

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Spring + JdbcTemplate + Custom RowMapper example | Spring JDBC tutorial

Employee.sql

CREATE DATABASE org_db;


CREATE TABLE `employee` (
  `EMPLOYEE_ID` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
  `NAME` VARCHAR(100) NOT NULL,
  `AGE` INT(10) NOT NULL,
  `SALARY` INT(10) DEFAULT NULL,
  PRIMARY KEY (`EMPLOYEE_ID`)
) ENGINE=INNODB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ram.core</groupId>
    <artifactId>SpringDemo</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringDemo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <spring.version>5.0.5.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <!-- Spring 5 dependencies -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- MySQL database driver -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>

    </dependencies>

</project>

Employee.java

package com.ram.employee.model;

public class Employee
{
    private int employeeId;
    private String name;
    private int age;
    private int salary;

    public int getEmployeeId()
    {
        return employeeId;
    }

    public void setEmployeeId(int employeeId)
    {
        this.employeeId = employeeId;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public int getAge()
    {
        return age;
    }

    public void setAge(int age)
    {
        this.age = age;
    }

    public int getSalary()
    {
        return salary;
    }

    public void setSalary(int salary)
    {
        this.salary = salary;
    }

    @Override
    public String toString()
    {
        return "Employee [employeeId=" + employeeId + ", name=" + name
                + ", age=" + age + ", salary=" + salary + "]";
    }

}

EmployeeRowMapper.java

package com.ram.employee.dao.mapper;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import com.ram.employee.model.Employee;

public class EmployeeRowMapper implements RowMapper<Employee>
{

    public Employee mapRow(ResultSet rs, int rowNum) throws SQLException
    {
        Employee employee = new Employee();
        employee.setEmployeeId(rs.getInt("EMPLOYEE_ID"));
        employee.setName(rs.getString("NAME"));
        employee.setAge(rs.getInt("AGE"));
        employee.setSalary(rs.getInt("SALARY"));
        return employee;
    }

}

EmployeeDAO.java

package com.ram.employee.dao;

import com.ram.employee.model.Employee;

public interface EmployeeDAO
{
    public Employee findByEmployeeId(int employeeId);
}

EmployeeDAOImpl.java

package com.ram.employee.dao.impl;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

import com.ram.employee.dao.EmployeeDAO;
import com.ram.employee.dao.mapper.EmployeeRowMapper;
import com.ram.employee.model.Employee;

public class EmployeeDAOImpl
        extends JdbcDaoSupport implements EmployeeDAO
{

    public Employee findByEmployeeId(int employeeId)
    {
        String sql = "SELECT * FROM EMPLOYEE WHERE EMPLOYEE_ID = ?";
       
        Employee employee = (Employee)getJdbcTemplate().queryForObject(
                sql, new Object[] { employeeId }, new EmployeeRowMapper());
           
        return employee;
       
    }

   
}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd">

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/org_db" />
        <property name="username" value="root" />
        <property name="password" value="root" />
    </bean>

    <bean id="employeeDAO" class="com.ram.employee.dao.impl.EmployeeDAOImpl">
        <property name="dataSource" ref="dataSource" />
    </bean>
   
</beans>

App.java

package com.ram.core;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.employee.dao.EmployeeDAO;
import com.ram.employee.model.Employee;

public class App
{
    public static void main(String[] args)
    {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "applicationContext.xml");

        EmployeeDAO employeeDAO = (EmployeeDAO) context
                .getBean("employeeDAO");
        Employee employee = employeeDAO.findByEmployeeId(1);
        System.out.println("employee = " + employee);
    }
}

Output:

Feb 01, 2019 10:17:39 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@35d176f7: startup date [Fri Feb 01 10:17:39 IST 2019]; root of context hierarchy
Feb 01, 2019 10:17:39 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
Feb 01, 2019 10:17:40 AM org.springframework.jdbc.datasource.DriverManagerDataSource setDriverClassName
INFO: Loaded JDBC driver: com.mysql.jdbc.Driver
Fri Feb 01 10:17:53 IST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
employee = Employee [employeeId=1, name=Peter, age=28, salary=80000]

Click the below link to download the code:
https://sites.google.com/site/javaspringram2019/java_spring_2019/SpringDemo_RowMapper.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java_Spring_2019/tree/master/Spring_2019/SpringDemo_RowMapper

Bitbucket Link:
https://bitbucket.org/ramram43210/java_spring_2019/src/f6e436d66d082f1d909211259e21badb13bac610/Spring_2019/SpringDemo_RowMapper/?at=master

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