常用类属于哪些jar包

1.@requestmapping注解，属于org.springframework.web.bind.annotation包下。org.springframework.web jar包。

2.@RestController注解，也属于org.springframework.web.bind.annotation包下，org.springframework.web jar包。

都是spring mvc，也就是spring web jar包下

3.@ComponentScan(basePackages = "com.pingan.property.icore.pap.*")注解，包扫面注解，属于spring下的jar包，context上下文中嘛,负责spring的ioc注入。

--->org.springframework.context.annotation;org.springframework.context jar包

4.@SpringBootApplication 属于org.springframework.boot.autoconfigure包下。org.springframework.boot jar包下。

5.@MapperScan(basePackages = "com.pingan.property.icore.pap.**.dao")注解，mapper当然属于mybatis了，所以属于mybatis的jar包下。

属于org.mybatis.spring.annotation;org.mybatis.spring jar包下。mybatis对接spring的jar包叫做org.mybatis.spring jar包

@SpringBootApplication
@ComponentScan(basePackages = "com.pingan.property.icore.pap.*")
@MapperScan(basePackages = "com.pingan.property.icore.pap.**.dao")
public class DemoApplication implements EnvironmentAware {

    private RelaxedPropertyResolver propertyResolver;

    @Override
    public void setEnvironment(Environment env) {
        this.propertyResolver = new RelaxedPropertyResolver(env, "spring.datasource.");
    }

    @Bean(destroyMethod = "close", initMethod = "init")
    public DataSource dataSource() {

        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl(propertyResolver.getProperty("url"));
        dataSource.setDriverClassName(propertyResolver.getProperty("driverClassName"));
        dataSource.setDefaultAutoCommit(Boolean.parseBoolean(propertyResolver.getProperty("defaultAutoCommit")));
        return dataSource;
    }


    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

6.@Bean注解，属于org.springframework.context.annotation下，都是用来项目启动时向ioc容器中注入bean的注解。

@Bean(destroyMethod = "close", initMethod = "init")
    public DataSource dataSource() {

        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl(propertyResolver.getProperty("url"));
        dataSource.setDriverClassName(propertyResolver.getProperty("driverClassName"));
        dataSource.setDefaultAutoCommit(Boolean.parseBoolean(propertyResolver.getProperty("defaultAutoCommit")));
        return dataSource;
    }

7.@@Configuration org.springframework.context.annotation;

6.EnvironmentAware 接口，属于org.springframework.context包下

7.RelaxedPropertyResolver类，属于org.springframework.boot.bind包下。

public class RelaxedPropertyResolver implements PropertyResolver，实现了PropertyResolver接口