Spring @Value("#{}")和@Value("${}")

@RestController
@RequestMapping("/test")
@Component
public class TestController {
    
    @Value("#{1}")
    private int number; //获取数字 1
    
    @Value("#{'Spring Expression Language'}") //获取字符串常量
    private String str;
    
    @Value("#{dataSource.url}") //获取bean的属性
    private String jdbcUrl;
    
    @Autowired
    private DataSourceTransactionManager transactionManager;
 
    @RequestMapping("value")
    public String valueTest() throws FileNotFoundException{
        System.out.println(number);
        System.out.println(str);
        System.out.println(jdbcUrl);
        return "success";
    }
}

jdbc.driverClass=com.mysql
jdbc.url=3306@127.0.0.1
jdbc.user=admin