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DomainClassConverter 在 Spring 引導中不起作用

[英]DomainClassConverter not working in Spring Boot

我有一個非常簡單的 Spring Boot MVC 項目,我在其中嘗試使用 DomainClassConverter 直接加載實體。 但似乎找不到 DomainClassConverter。 訪問“localhost:8080/one/2”url 時出現以下錯誤:

無法將類型“java.lang.String”的值轉換為所需類型“com.example.test.data.Customer”:找不到匹配的編輯器或轉換策略

但是 DomainClassConverter 應該由 Spring 啟動並管理轉換。

我還嘗試通過 @EnableSpringDataWebSupport 注釋明確啟用它,但它也沒有工作。

這是我的 controller 代碼:

@Controller
public class TestController {

    @Autowired
    private CustomerRepository customerRepository;

    @GetMapping("/all")
    public void all(Model model) {
        Iterable<Customer> customers=customerRepository.findAll();
        model.addAttribute("customers",customers);
    };

    @GetMapping("/one/{customer_id}")
    public void one(@PathVariable("customer_id") Customer customer, Model model) {
        model.addAttribute("customer",customer);
    };
}

客戶代碼:

@Entity
public class Customer {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Getter
    private Long id;

    @Getter
    @Setter
    private String firstName;

    @Getter
    @Setter
    private String lastName;

    protected Customer() {
    }

    public Customer(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

}

CustomerREpositoy:

public interface CustomerRepository extends PagingAndSortingRepository<Customer, Long> {

    List<Customer> findByLastName(String lastName);

    Customer findById(long id);
}

應用程序:

@SpringBootApplication
public class TestApplication {
    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class);
    }
}

最后是 build.graddle:

plugins {
    id 'org.springframework.boot' version '2.3.1.RELEASE'
    id 'io.spring.dependency-management' version '1.0.9.RELEASE'
    id 'java'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '14'

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
//    implementation 'org.springframework.boot:spring-boot-starter-security'
    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    compileOnly 'org.projectlombok:lombok'
    developmentOnly 'org.springframework.boot:spring-boot-devtools'
    runtimeOnly 'org.postgresql:postgresql'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
    }
//    testImplementation 'org.springframework.security:spring-security-test'
}

test {
    useJUnitPlatform()
}

任何想法?

您嘗試將customer_id (路徑變量)作為客戶 object。 因此,當您嘗試訪問localhost:8080/one/2時會出現上述錯誤。

customer_id (路徑變量)數據類型更改為相關數據類型(字符串、整數等),如下所示,

@GetMapping("/one/{customer_id}")
public void one(@PathVariable("customer_id") String customerId, Model model) {
    ----
};

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