import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableDefault;
@RestController
@RequestMapping("/api/items")
public class ItemController {
private final ItemService itemService;
@Autowired
public ItemController(ItemService itemService) {
this.itemService = itemService;
}
@GetMapping
public ResponseEntity<Page<Item>> listItems(@PageableDefault(size = 10, page = 0) Pageable pageable) {
Page<Item> page = itemService.listItems(pageable);
return ResponseEntity.ok(page);
}
@GetMapping("/{id}")
public ResponseEntity<Item> getItem(@PathVariable("id") Long id) {
Item item = itemService.getItemById(id);
if (item == null) {
return ResponseEntity.notFound().build();
}
return ResponseEntity.ok(item);
}
@PostMapping
public ResponseEntity<Item> createItem(@RequestBody Item item) {
Item newItem = itemService.createItem(item);
return ResponseEntity.ok(newItem);
}
@PutMapping("/{id}")
public ResponseEntity<Item> updateItem(@PathVariable("id") Long id, @RequestBody Item item) {
Item updatedItem = itemService.updateItem(id, item);
if (updatedItem == null) {
return ResponseEntity.notFound().build();
}
return ResponseEntity.ok(updatedItem);
}
@DeleteMapping("/{id}")
public ResponseEntity<?> deleteItem(@PathVariable("id") Long id) {
itemService.deleteItemById(id);
return ResponseEntity.noContent().build();
}
}这个代码实例展示了如何使用Spring Boot创建REST API控制器。它遵循了REST API设计的最佳实践，包括使用Pageable进行分页、使用ResponseEntity进行响应处理、使用@PathVariable和@RequestBody注解来处理路径变量和请求体中的数据，以及使用@RestController来标识控制器是以REST风格提供服务的。