[JAVA] [Spring Boot] Get user information with Rest API (beginner)

Things necessary

  1. entity class (Employee.java)
  2. Repository interface (EmployeeRepository.java)
  3. main class (first called class, SampleApplication.java)
  4. RestController class (Con.java)
  5. application.properties (DB information retention file)
  6. build.gradle (mainly dependencies)

Source code


public class Employee {
    private Long id;
    private String empname;
    public Long getId() {
        return id;
    public void setId(Long id) {
        this.id = id;
    public String getEmpname() {
        return empname;
    public void setEmpname(String empname) {
        this.empname = empname;


public interface EmployeeRepository extends JpaRepository<Employee, Long> {


public class SampleApplication {
    public static void main(String[] args) {
        SpringApplication.run(SampleApplication.class, args);


public class Con {
    EmployeeRepository empRepository;
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String index(Model model) {
        List<Employee> emplist=empRepository.findAll();
        model.addAttribute("emplist", emplist);
        return emplist.toString();


spring.datasource.url=jdbc:mysql://localhost:3306/db name
//No password required if no password is specified in brew install


plugins {
    id 'org.springframework.boot' version '2.1.8.RELEASE'
    id 'io.spring.dependency-management' version '1.0.8.RELEASE'
    id 'java'

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

configurations {
    runtimeClasspath {
        extendsFrom developmentOnly
    compileOnly {
        extendsFrom annotationProcessor

repositories {

dependencies {

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