Java 创建名为“dataSource”的 bean + Spring Boot + Hibernate 时出错
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Error creating bean with name 'dataSource' + Spring Boot + Hibernate
提问by justus
I have a few problems starting up the spring guide on how to access mysql data (see this link: https://spring.io/guides/gs/accessing-data-mysql/). I adjusted the classes slightly, so I have this code:
我在启动有关如何访问 mysql 数据的 spring 指南时遇到了一些问题（请参阅此链接：https: //spring.io/guides/gs/accessing-data-mysql/）。我稍微调整了类，所以我有这个代码：
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.springframework</groupId> <artifactId>gs-mysql-data</artifactId> <version>0.1.0</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.6.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- JPA Data (We are going to use Repositories, Entities, Hibernate, etc...) --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <!-- Use MySQL Connector-J --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> </dependencies> <properties> <java.version>1.8</java.version> </properties> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.springframework</groupId> <artifactId>gs-mysql-data</artifactId> <version>0.1.0</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.6.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- JPA Data (We are going to use Repositories, Entities, Hibernate, etc...) --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <!-- Use MySQL Connector-J --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> </dependencies> <properties> <java.version>1.8</java.version> </properties> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
I am using this mainController: MainController.java
我正在使用这个 mainController: MainController.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import com.resource.iPbackend.UserRepository;
import com.resource.iPbackend.User;
@Controller
@RequestMapping(path = "/main")
public class MainController {
@Autowired
private UserRepository userRepository;
@RequestMapping(path = "/reg", method = RequestMethod.POST)
public @ResponseBody String regNewUser (@RequestParam String firstName, @RequestParam String lastName, @RequestParam String email, @RequestParam String password, @RequestParam String username) {
User n = new User();
n.setFirstName(firstName);
n.setLastName(lastName);
n.setEmail(email);
n.setPassword(password);
n.setUsername(username);
userRepository.save(n);
return "User is stored in database: " + n;
}
@GetMapping(path = "/all")
public @ResponseBody Iterable<User> getAllUsers() {
return userRepository.findAll();
}
}
Together with this repository: UserRepository.java
连同这个存储库： UserRepository.java
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.resource.iPbackend.User;
@Repository
public interface UserRepository extends CrudRepository<User, Long> {
}
And this Entity: User.java
而这个实体： User.java
import org.springframework.data.annotation.Id;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String firstName;
private String lastName;
private String email;
private String password;
private String username;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
And finally I have this Application.class:
最后我有了这个 Application.class：
@EnableAutoConfiguration
@SpringBootApplication
public class IPbackendApplication {
public static void main(String[] args) {
SpringApplication.run(IPbackendApplication.class, args);
}
}
I am getting this error:
我收到此错误：
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalArgumentException: URL must start with 'jdbc' at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1193) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为“org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration”的bean时出错：通过构造函数参数0表示的不满足的依赖；嵌套异常是 org.springframework.beans.factory.BeanCreationException：在类路径资源 [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class] 中定义名称为“dataSource”的 bean 创建时出错：通过工厂方法的 Bean 实例化失败; 嵌套异常是 org.springframework.beans.BeanInstantiationException：无法实例化 [org.apache.tomcat.jdbc.pool.DataSource]：工厂方法“dataSource”抛出异常；嵌套异常是 java.lang.IllegalArgumentException: URL must start with 'jdbc' at org.springframework.beans。
Thanks for your help!
谢谢你的帮助！
回答by davidxxx
Look at this message in the exception trace :
在异常跟踪中查看此消息：
nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalArgumentException: URL must start with 'jdbc'at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
嵌套异常是 org.springframework.beans.BeanInstantiationException：无法实例化 [org.apache.tomcat.jdbc.pool.DataSource]：工厂方法“dataSource”抛出异常；嵌套异常是 java.lang.IllegalArgumentException: URL must start with 'jdbc'at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
You very probably don't provide an application.propertiesfile that values the spring.datasource.urlproperty.
Or else you don't value it correctly.
您很可能没有提供application.properties对spring.datasource.url属性进行评估的文件。
否则你没有正确评价它。
It should look like :
它应该看起来像：
spring.datasource.url=jdbc:mysql://localhost/mydb
You can refer to the Spring Boot documentation.
您可以参考Spring Boot 文档。
回答by Daniel C.
The last properties that you share have some errors to fix spring.datasource.data-username=myuserand spring.datasource.data-password=ThePassword
您共享的最后一个属性有一些错误需要修复spring.datasource.data-username=myuser和spring.datasource.data-password=ThePassword
This is and example of how to properly configure the spring datasource
这是如何正确配置 spring 数据源的示例
spring.datasource.url=jdbc:mysql://localhost:3306/mydb
spring.datasource.username=myuser
spring.datasource.password=ThePassword
It is another example from Spring documentation
这是Spring 文档中的另一个示例
spring.datasource.url=jdbc:mysql://localhost/test
spring.datasource.username=dbuser
spring.datasource.password=dbpass
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
回答by Kirill Ch
I received pretty similar error when try to test my dao layer.
尝试测试我的 dao 层时，我收到了非常相似的错误。
@RunWith(SpringRunner.class)
@DataJpaTest
public class ItemRepositoryTest {
@Autowired
private ItemRepository itemRepository;
@Test
public void findAll() {
List<Item> allItems = itemRepository.findAll();
Assertions.assertThat(allItems).hasSize(9);
}
}
The issue was resolved by adding:
通过添加以下内容解决了该问题：
@AutoConfigureTestDatabase(replace=AutoConfigureTestDatabase.Replace.NONE)
@AutoConfigureTestDatabase(replace=AutoConfigureTestDatabase.Replace.NONE)
to the test class:
到测试类：
@RunWith(SpringRunner.class)
@DataJpaTest
@AutoConfigureTestDatabase(replace=AutoConfigureTestDatabase.Replace.NONE)
public class ItemRepositoryTest {...}
