Spring-启动 Cloug 配置客户端无法自动装配

Question

我在这里学习了教程：https://www.jianshu.com/p/2ef6a9259112 .

我无法从我的数据库中自动装配密钥。

 @RefreshScope
 @RestController
 public class MainController {
@Value("${key}")
private String sql;

@Autowired
private DataSource dataSource;

@RequestMapping("/showConfig")
@ResponseBody
public String showConfig() {
    String configInfo = "sql key-value pair" + sql;
return configInfo;
}

客户bootstrap.properties:

spring.application.name=config-client

# This is the default:
spring.cloud.config.uri=http://localhost:8888
management.security.enabled=false

spring.cloud.config.label=master
spring.cloud.config.profile=test
server.port=7777

服务器属性

server.port=8888
spring.datasource.url=jdbc:mariadb://localhost:3306/noob? 
createDatabaseIfNotExist=true
spring.datasource.username=root
spring.datasource.password=abc123
spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.datasource.platform= mysql
spring.datasource.hikari.connection-timeout=5000
spring.datasource.hikari.maximum-pool-size=10

spring.profiles.active= jdbc

spring.jpa.hibernate.ddl-auto=create-drop
spring.cloud.config.server.default-profile=production
spring.cloud.config.server.default-label=latest

spring.cloud.config.server.jdbc.sql=SELECT `key`, `value` FROM `properties` 
WHERE `application`=? AND `profile`=? AND `label`=?;
spring.cloud.config.server.jdbc.order=0

我在我的 noob 数据库中创建了这些表：

CREATE TABLE `properties` (
  `application` varchar(200) DEFAULT NULL,
  `profile` varchar(200) DEFAULT NULL,
  `label` varchar(200) DEFAULT NULL,
  `key` varchar(200) DEFAULT NULL,
  `value` varchar(200) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1

INSERT INTO `properties` (`key`, `value`, `application`, `profile`, 
`label`)
VALUES ('datasource-driver-class- 
name','MyDriverClass','appplication1','production','latest');

org.springframework.beans.factory.BeanCreationException：创建名称为 'scopedTarget.mainController' 的 bean 时出错：注入自动装配的依赖项失败；嵌套异常是 java.lang.IllegalArgumentException：无法解析值“${key}”中的占位符“key” 在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:380) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE] 在 ... ...省略了 28 个常见帧

Answer 1

按照教程并提供输入，您可以期待一些 @Value：

@Value("${datasource-driver-class-name}")
private transient String driverClassName;

I took your advice. I believe it is supposed to work. I want my result to be MyDriverClass but I am getting another error. "Field dataSource in com.example.demo.MainController required a bean of type 'javax.sql.DataSource' that could not be found."

..然后，你使用"maria"，在教程中使用"mysql" db，请调整相应的maven依赖：

pom.xml:

<!-- dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency -->
<dependency>
    <groupId>org.mariadb.jdbc</groupId>
    <artifactId>mariadb-java-client</artifactId>
    <!-- version>1.1.7</version -->
</dependency>

Spring-启动 Cloug 配置客户端无法自动装配

Spring-Boot Cloug Config Client unable to Autowire

java

jdbc

spring-boot

spring-cloud-config