我知道dataSource如果设置相关配置,spring boot会自动创建一个Bean application.properties,如:
spring.datasource.url = jdbc:mysql://192.168.10.103:3306/hms?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=test@123
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
申请代码:
package com.synline.mdataserver;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.apache.tomcat.jdbc.pool.DataSource;
@SpringBootApplication
public class Application implements CommandLineRunner {
@Autowired
AnnotationConfigApplicationContext context;
/*@Autowired
DataSource dataSource;*/
public static void main(String[] args) throws InterruptedException {
SpringApplication.run(Application.class, args);
}
@Override
public void run(String... args) throws Exception {
DataSource dataSource = (DataSource)context.getBean("dataSource");
System.out.println(dataSource);
while (true) {
Thread.sleep(5000);
}
}
}
如果@Autowired DataSource被注释掉,将打印Bean信息:
org.apache.tomcat.jdbc.pool.DataSource@1800a575{ConnectionPool[defaultAutoCommit=null; defaultReadOnly=null; ....}
所以我认为Spring Boot真的创建了Bean.
但是如果使用了@Autowried DataSource,那么抱怨No …