java Spring boot @ConfigurationProperties 未加载
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Spring boot @ConfigurationProperties not loaded
提问by Raghu
As the title says, I'm trying to use Typesafe Configuration Propertiesto load a list of DataSourceConfigobjects. I have lombok for setter/getters
正如标题所说，我正在尝试使用类型安全配置属性来加载DataSourceConfig对象列表。我有用于 setter/getter 的 lombok
The main application class annotations
主要应用类注解
@Slf4j
@SpringBootApplication
@EnableConfigurationProperties
public class Application {
The configuration pojo
配置pojo
@Data
public class DataSourceConfig {
private String key;
private String dbname;
private String dbpath;
}
The yml file
.yml 文件
tenantdb:
dataSourceConfig:
-
key: default
dbpath: file:eventstore/jdbc/database
dbname: defaultdb
-
key: other
dbpath: file:eventstore/jdbc/other
dbname: dslfjsdf
Finally, the Spring Configuration class with the @ConfigurationProperties annotation.
最后，带有@ConfigurationProperties 注释的 Spring Configuration 类。
@Configuration
@Profile("hsqldb")
@ImportResource(value = { "persistence-config.xml" })
@Slf4j
@ConfigurationProperties(prefix="tenantdb", locations={"datasources.yml"})
public class HsqlConfiguration {
private List<DataSourceConfig> dataSourceConfig = new ArrayList<>();
@Bean
public List<DataSourceConfig> getDataSourceConfig() {
return dataSourceConfig;
}
With the config above, I get:
使用上面的配置，我得到：
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hsqlConfiguration': Could not bind properties to [unknown] (target=tenantdb, ignoreInvalidFields=false, ignoreUnknownFields=true, ignoreNestedProperties=false); nested exception is java.lang.NullPointerException
at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:303)
at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:250)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initia
I've tried various combinations. If I change the annotation to @ConfigurationProperties(prefix="tenantdb.dataSourceConfig"), I don't get the error but List<DataSourceConfig>is empty.
我尝试了各种组合。如果我将注释更改为@ConfigurationProperties(prefix="tenantdb.dataSourceConfig")，则不会收到错误但List<DataSourceConfig>为空。
HELP!!
帮助！！
采纳答案by Nenad Bozic
You should use configuration properties as simple POJO with only getters and setters and have separate HsqlConfigurationwhich has this properties injected.
您应该将配置属性用作只有 getter 和 setter 的简单 POJO，并且有单独的HsqlConfiguration注入此属性的属性。
Something like this:
像这样的东西：
@Component
@ConfigurationProperties(prefix="tenantdb", locations={"datasources.yml"})
public class TenantDbProperties {
//DataSourceConfig is POJO with key, dbpath and dbname
private List<DataSourceConfig> dataSourceConfigs;
public List<DataSourceConfig> getDataSourceConfigs(){
return dataSourceConfigs;
}
public void setDataSourceConfigs(List<DataSourceConfig> dataSourceConfigs){
this.dataSourceConfigs = dataSourceConfigs;
}
}
And in separate class have this properties injected as:
并在单独的类中将这些属性注入为：
@Configuration
@Profile("hsqldb")
@ImportResource(value = { "persistence-config.xml" })
@Slf4j
public class HsqlConfiguration {
@Autowired
private TenantDbProperties tenantDbProperties;
//code goes here where you can use tenantDbProperties.getDataSourceConfigs()
}
