// src/main/java/com/example/web/rest/TodoResource.java
package com.example.web.rest;

import com.example.domain.Todo;
import com.example.repository.TodoRepository;
import org.springframework.web.bind.annotation.*;
import java.util.List;

@RestController
@RequestMapping("/api/todos")
public class TodoResource {

    private final TodoRepository todoRepository;

    public TodoResource(TodoRepository todoRepository) {
        this.todoRepository = todoRepository;
    }

    @GetMapping
    public List<Todo> getAll() {
        return todoRepository.findAll();
    }

    @PostMapping
    public Todo create(@RequestBody Todo todo) {
        return todoRepository.save(todo);
    }
}

// src/main/java/com/example/domain/Todo.java
package com.example.domain;

import javax.persistence.*;

@Entity
public class Todo {
    @Id @GeneratedValue
    private Long id;
    private String title;
    private boolean completed;

    // getters and setters
}

Demonstrates a simple JHipster-generated Spring Boot backend with REST endpoints for managing Todo items.