我的样本项目是基于Maven的结构,下src/main/resources
夹中的所有我的应用程序proeprties文件。以下是完整的示例代码。我不明白为什么我的代码无法正确查找配置文件,除非我使用@PropertySource
注释。春型材org.springframework.beans.factory.NoSuchBeanDefinitionException
我的实际疑问是:我已经在application.properties文件中很好地配置了弹簧属性,但为什么它找不到配置文件及其各自的属性文件?除非我正在使用@PropertySource
注释,IAM不env.getProperty获得价值(“mysql.url”)。我的意思是Environment
类无法从配置文件属性文件中获取值。 为什么?下面
荫收到错误为:
Jul 08, 2017 7:54:26 PM org.springframework.context.annotation.AnnotationConfigApplicationContext prepareRefresh
INFO: Refreshing org.spring[email protected]300ffa5d: startup date [Sat Jul 08 19:54:26 IST 2017]; root of context hierarchy
helloBean
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'datasource' available
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687)
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1207)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1084)
at com.oreilly.datasource.Main2.main(Main2.java:15)
DatasourceConfig.java
package com.oreilly.datasource;
import javax.sql.DataSource;
import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.annotation.PropertySources;
import org.springframework.core.env.Environment;
@Configuration
/*@PropertySource("classpath:/application.properties")
@PropertySource("classpath:/dev/application-dev.properties")
@PropertySource("classpath:/prod/application-prod.properties")*/
public class DatasourceConfig {
@Autowired
private Environment env;
@Bean(name="helloBean")
public String helloWorld() {
System.out.println("helloBean");
return "helloWorld....";
}
@Bean(name="datasource")
@Profile("dev")
public DataSource datasourceForDev(){
BasicDataSource dataSource = new BasicDataSource();
System.out.println(env.getProperty("mysql.url"));
return dataSource;
}
@Bean(name="datasource")
@Profile("prod")
public DataSource datasourceForProd(){
BasicDataSource dataSource = new BasicDataSource();
System.out.println(env.getProperty("mysql.url"));
return dataSource;
}
}
Main2.java
package com.oreilly.datasource;
import javax.sql.DataSource;
import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class Main2 {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DatasourceConfig.class);
DataSource dataSource = context.getBean("datasource", DataSource.class);
String helloBean = context.getBean("helloBean", String.class);
}
}
个
application.properties
spring.profiles.active=prod
spring.config.name=application
spring.config.location=classpath:/application.properties,classpath:/dev/application-dev.properties,classpath:/prod/application-dev.properties
下面是该项目的文件夹结构:
请告诉我哪里出了问题?在相同的位置application.property
我想要根据我在application.properties中声明的配置文件自动拾取属性文件。任何想法? – John
不使用@PropertySource应该如何工作,如何?我的意思是它应该自动拾取我的application-dev.properties,如何? – John