运行 Spring Boot 应用程序时出现此错误：
启动 ApplicationContext 时出错。要显示条件评估报告，请在启用“调试”的情况下重新运行您的应用程序。
2024-05-11T14：59：30.328 + 04：00错误12628 --- [作业3] [主要] o.s.b.d.LoggingFailureAnalysisReporter：
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应用程序无法启动
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描述：
az.edu.ada.wm2.Assignment3.service.impl.BookServiceImpl 中的构造函数的参数 1 需要类型为“az.edu.ada.wm2.Assignment3.mapper.BookMapper”的 bean，但无法找到。
这是我的源文件：
Book.java
package az.edu.ada.wm2.Assignment3.model.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import jakarta.persistence.*;
@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Book {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String title;
private String author;
private String description;
private String publishYear;
}
BookDto.java
package az.edu.ada.wm2.Assignment3.model.dto;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.Size;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class BookDto {
private Long id;
@NotBlank(message = "Title is required")
@Size(max = 100, message = "Title must be less than 100 characters")
private String title;
@NotBlank(message = "Author is required")
@Size(max = 50, message = "Author must be less than 50 characters")
private String author;
@NotBlank(message = "Description is required")
@Size(max = 200, message = "Description must be less than 200 characters")
private String description;
}
BookServiceImpl.java
package az.edu.ada.wm2.Assignment3.service.impl;
import az.edu.ada.wm2.Assignment3.mapper.BookMapper;
import az.edu.ada.wm2.Assignment3.model.dto.BookDto;
import az.edu.ada.wm2.Assignment3.model.entity.Book;
import az.edu.ada.wm2.Assignment3.repository.BookRepository;
import az.edu.ada.wm2.Assignment3.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.stream.Collectors;
@Service
public class BookServiceImpl implements BookService {
private final BookRepository bookRepository;
private final BookMapper bookMapper;
@Autowired
public BookServiceImpl(BookRepository bookRepository, BookMapper bookMapper){
this.bookRepository=bookRepository;
this.bookMapper = bookMapper;
}
@Override
public List<BookDto> getAllBooks() {
return bookRepository.findAll().stream()
.map(bookMapper::bookToBookDto)
.collect(Collectors.toList());
}
@Override
public BookDto getBookById(Long id) {
return bookMapper.bookToBookDto(bookRepository.findById(id)
.orElseThrow(() -> new RuntimeException("Book not found")));
}
@Override
public BookDto createBook(BookDto bookDTO) {
Book book = bookMapper.bookDtoToBook(bookDTO);
return bookMapper.bookToBookDto(bookRepository.save(book));
}
@Override
public BookDto updateBook(Long id, BookDto bookDTO) {
Book existingBook = bookRepository.findById(id)
.orElseThrow(() -> new RuntimeException("Book not found"));
existingBook.setTitle(bookDTO.getTitle());
existingBook.setAuthor(bookDTO.getAuthor());
existingBook.setDescription(bookDTO.getDescription());
return bookMapper.bookToBookDto(bookRepository.save(existingBook));
}
@Override
public void deleteBook(Long id) {
bookRepository.deleteById(id);
}
}
BookController.java
package az.edu.ada.wm2.Assignment3.controller;
import az.edu.ada.wm2.Assignment3.model.dto.BookDto;
import az.edu.ada.wm2.Assignment3.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import jakarta.validation.Valid;
import java.util.List;
@RestController
@RequestMapping("/books")
public class BookController {
private final BookService bookService;
@Autowired
public BookController(BookService bookService) {
this.bookService = bookService;
}
@GetMapping
public ResponseEntity<List<BookDto>> getAllBooks() {
List<BookDto> books = bookService.getAllBooks();
return ResponseEntity.ok(books);
}
@GetMapping("/{id}")
public ResponseEntity<BookDto> getBookById(@PathVariable Long id) {
BookDto book = bookService.getBookById(id);
return ResponseEntity.ok(book);
}
@PostMapping
public ResponseEntity<BookDto> createBook(@Valid @RequestBody BookDto bookDTO) {
BookDto createdBook = bookService.createBook(bookDTO);
return ResponseEntity.status(HttpStatus.CREATED).body(createdBook);
}
@PutMapping("/{id}")
public ResponseEntity<BookDto> updateBook(@PathVariable Long id, @Valid @RequestBody BookDto bookDTO) {
BookDto updatedBook = bookService.updateBook(id, bookDTO);
return ResponseEntity.ok(updatedBook);
}
@DeleteMapping("/{id}")
public ResponseEntity<Void> deleteBook(@PathVariable Long id) {
bookService.deleteBook(id);
return ResponseEntity.noContent().build();
}
}
构建.gradle
plugins {
id 'java'
id 'org.springframework.boot' version '3.2.5'
id 'io.spring.dependency-management' version '1.1.4'
}
group = 'az.edu.ada.wm2'
version = '0.0.1-SNAPSHOT'
java {
sourceCompatibility = '17'
}
configurations {
compileOnly {
extendsFrom annotationProcessor
}
}
repositories {
mavenCentral()
}
dependencies {
compileOnly 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
implementation 'org.springframework.boot:spring-boot-starter-validation'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'org.springframework.boot:spring-boot-starter-web'
compileOnly 'org.projectlombok:lombok'
runtimeOnly 'com.h2database:h2'
annotationProcessor 'org.projectlombok:lombok'
implementation 'org.mapstruct:mapstruct:1.5.5.Final'
annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.5.Final'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
}
tasks.named('test') {
useJUnitPlatform()
}
我尝试按照大多数在线解决方案中的建议使用 lombok 进行服务类，但是，这也没有帮助。您能帮我找到并解决问题吗？
错误
a bean of type 'az.edu.ada.wm2.Assignment3.mapper.BookMapper' that could not be found@Mapper(componentModel = "spring")