5.注解@Configuration

标注一个类为配置类

6.注解@Bean

用@Bean标注方法等价于XML中配置的bean

@Configuration //容器启动时加载
public class AppBootConfig {//创建bean实例 别名为stu@Bean(name = "stu")public Student getStudent(){Student stu = new Student();stu.setStudentName("zhangsan");return  stu;}
}

7.注解@PropertySource+@ConfigurationProperties + @Value

准备一个yml文件

wzy:  
uname: zy  
age: 18  
sex: 男

读取properties或yml文件

@Configuration
@PropertySource("classpath:smbms.yml")     //读取文件
@ConfigurationProperties(prefix = "wzy")  //前缀
public class AppBootConfig {@Value("${uname}")  //写入yml中对应的keyprivate String name ;@Bean(name = "stu")public Student getStudent(){Student stu = new Student();stu.setStudentName(name);return  stu;}
}

8.注解@ComponentScan

扫包，service、controller.....

@SpringBootApplication
@ComponentScan("com.package1,cn.package2")
public class SpringbootcsApplication {public static void main(String[] args) {SpringApplication.run(SpringbootcsApplication.class, args);}
}

1.注意
@SpringBootApplication注解也包含了@ComponentScan注解，所以在使用中我们也可以通过
@SpringBootApplication注解的scanBasePackages属性进行配置

@SpringBootApplication(scanBasePackages =
{"com.hz.service","com.hz.controller"})

2. 注意
SpringBoot会默认扫描启动类所在的包及其子包

9.注解@EnableTransactionManagement

 开启事务注解

@SpringBootApplication
@EnableTransactionManagement
public class SpringbootcsApplication {public static void main(String[] args) {SpringApplication.run(SpringbootcsApplication.class, args);}
}

 10.注解@MapperScan

扫描mybatisDao下接口 指定某些类作为Mapper映射文件

@SpringBootApplication(scanBasePackages =
{"com.hz.service","com.hz.controller"})
@MapperScan("com.hz.dao")
@EnableTransactionManagement
public class SpringbootcsApplication {
public static void main(String[] args) {SpringApplication.run(SpringbootcsApplication.class, args);
}
}