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[英]How can i create constructor with autowired and non autowired fields simultaniosly?
[英]How can I make Autowired adnotation working?
我正在嘗試使用一些互聯網課程學習春天。 我有@Autowired的問題,我仍然得到錯誤:org.springframework.beans.factory.UnsatisfiedDependencyException
我發現了許多類似的問題,但沒有人適合我的。
我的產品類:
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table
public class Product {
@Id
private int id;
private String name;
@Column(name = "description")
private String desc;
private double price;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}
接口ProductRepository:
import HIB_UD_01.product.entities.Product;
import org.springframework.data.repository.CrudRepository;
public interface ProductRepository extends CrudRepository<Product, Integer> {
}
ProductdataApplication:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ProductdataApplication {
public static void main(String[] args) {
SpringApplication.run(ProductdataApplication.class, args);
}
}
我的測試課:
import HIB_UD_01.product.entities.Product;
import HIB_UD_01.product.repos.ProductRepository;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class ProductdataApplicationTests {
@Autowired
ProductRepository repository;
@Test
public void contextLoads() {
}
@Test
public void testCreate() {
Product product = new Product();
product.setId(1);
product.setName("Iphone");
product.setDesc("Awesome");
product.setPrice(1000d);
repository.save(product);
}
}
最后,我的文件歸檔:
spring.datasource.url=jdbc:mysql://localhost:3306/mydb
spring.datasource.username=root
spring.datasource.password=password
我應該將有關產品的數據放入db,但是我收到一個錯誤:
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'HIB_UD_01.product.ProductdataApplicationTests': Unsatisfied dependency expressed through field 'repository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'HIB_UD_01.product.repos.ProductRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
您可能必須在SpringBootApplication類上(或在單獨的配置類中)啟用存儲庫:
https://www.concretepage.com/spring-boot/spring-boot-crudrepository-example
如果這不起作用,請確保您的SpringBootApplication類是一個比其他類更高的包,因此SpringBoot可以自動檢測您的bean。 (並且您可以嘗試使用@Repository注釋您的存儲庫,以確保SpringBoot自動檢測您的存儲庫。)
另見:
https://dzone.com/articles/the-springbootapplication-annotation-example-in-ja
https://docs.spring.io/spring-boot/docs/current/reference/html/using-boot-structuring-your-code.html
好的,問題已解決。 我將@Repository添加到ProductRepository。 我清除了存儲庫文件夾並下載了新的存儲庫。 然后我與MySQL的時區有錯誤。 所以我編輯我的專業文件:
spring.datasource.url=jdbc:mysql://localhost:3306/mydb?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
謝謝您的幫助!
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