特别是我有一个属于多项目构建的子项目。
该子项目没有SpringBootApplication
自己的。
经过一些研究,我发现在 ClassPath@SpringBootConfiguration
中搜索了
但是现在我无法进一步了解,因为找不到DataSource
在中配置的那个。application.yml
抛出以下异常:
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'de.acme.storage.DBConnectionTest': Unsatisfied dependency expressed through field 'dataSource'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'javax.sql.DataSource' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@javax.inject.Inject()}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
...
我的期望是看到输出:DataSource: HikariDataSource (HikariPool-1)
正如关于 Spring Boot 2 和 Hikari 的指南中所解释的那样。
但是,本指南已经对 SpringBootApplication 类中的“测试”感到满意。
我的错在哪里?
子项目的结构如下:
src
+---main
| \---java
| | \---de
| | \---acme
| | \---storage
| | +---model
| | | User.java
| | |
| | \---mysql
| | UserDAOImpl.java
|
\---test
+---java
| \---de
| \---acme
| \---storage
| DBConnectionTest.java
| TestConfig.java
|
\---resources
application.yml
子项目的build.gradle:
plugins {
id 'org.springframework.boot'
}
apply plugin: 'io.spring.dependency-management'
dependencies {
implementation project(':api'),
'javax.inject:javax.inject:1',
'org.springframework.boot:spring-boot-starter-data-jpa'
runtime 'mysql:mysql-connector-java'
}
主项目中的 build.gradle 包含此依赖项部分:
dependencies {
implementation 'org.slf4j:slf4j-api'
testImplementation('org.springframework.boot:spring-boot-starter-test') {
exclude group: 'junit', module: 'junit' //by both name and group
}
testImplementation 'org.junit.jupiter:junit-jupiter-api',
'org.junit.jupiter:junit-jupiter-params'
testRuntime 'org.junit.jupiter:junit-jupiter-engine'
}
application.yml 内容:
spring:
datasource:
url: jdbc:mysql://localhost:13306/testdb
username: test-user
password: geheim
jpa:
properties:
hibernate:
dialect: org.hibernate.dialect.MySQLDialect
format_sql: true
id:
new_generator_mappings: false
JUnit 测试:
@SpringBootTest
class DBConnectionTest {
private static final Logger LOG = LoggerFactory.getLogger(DBConnectionTest.class);
@Inject
private DataSource dataSource;
@Test
void test() {
LOG.debug("DataSource: {}", dataSource);
assertThat(dataSource).as("Es gibt eine Datasource").isNotNull();
}
}
@SpringBootConfiguration
最后是带有注释的空配置:
package de.acme.storage;
import org.springframework.boot.SpringBootConfiguration;
@SpringBootConfiguration
class TestConfig {
}