templates / create.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Create Student</title>
</head>
<body>
<h1>Create Student</h1>
<form th:action="@{/create}" method="post">
<!-- 사용자가 제공할 데이터에 알맞은 input과 label을 만든다.-->
<label for="name-input">Name: <input id="name-input" name="name"></label><br>
<label for="email-input">Email: <input id="email-input" name="email"></label><br>
<!-- 데이터 제출 버튼-->
<input type="submit"/>
</form>
<a href="/home">Back</a>
</body>
</html>
templates / home.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Student List</title>
</head>
<body>
<h1>Student List</h1>
<!--등록된 학생이 없을 떄 -->
<div th:if="${studentList.isEmpty()}">
<p> No Student Here ... </p>
</div>
<div th:unless="${studentList.isEmpty()}" th:each="student: ${studentList}">
<p>번호 : [[${student.id}]]</p>
<p>이름 : [[${student.name}]]</p>
<p>이메일 : [[${student.email}]]</p>
</div><hr>
<a th:href="@{/create-view}">Create</a>
</body>
</html>
model / StudentDto.java
package com.example.crud.model;
public class StudentDto {
private Long id;
private String name;
private String email;
public StudentDto() {
}
public StudentDto(Long id, String name, String email) {
this.id = id;
this.name = name;
this.email = email;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "StudentDto{" +
"id=" + id +
", name='" + name + '\'' +
", email='" + email + '\'' +
'}';
}
}
StudentService.java
package com.example.crud;
import com.example.crud.model.StudentDto;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
@Service
public class StudentService {
// 복수의 StudentDto를 담는 변수
List<StudentDto> studentDtoList = new ArrayList<>();
private Long nextId = 1L;
// 새로운 Student를 생성하는 메소드
public StudentDto createStudent(String name, String email){
StudentDto studentDto = new StudentDto(nextId++, name, email);
studentDtoList.add(studentDto);
return studentDto;
}
public List<StudentDto> readStudentAll(){
return studentDtoList;
}
}
StudentController.java
package com.example.crud;
import com.example.crud.model.StudentDto;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class StudentController {
// StudentService를 Controller 에서
private StudentService studentService;
public StudentController(StudentService studentService) {
this.studentService = studentService;
}
@GetMapping("/create-view")
public String createView(){
return "create";
}
@PostMapping("/create")
public String create(@RequestParam("name") String name, @RequestParam("email") String email){
StudentDto studentDto = studentService.createStudent(name, email);
System.out.println(studentDto.toString());
return "redirect:/home";
}
@GetMapping("/home")
public String home(Model model) {
model.addAttribute("studentList", studentService.readStudentAll());
return "home";
}
}
결과 화면
