Spring IOC 常用注解与使用实例详解

@Component
public class Role{
    @Value("1")
    private Long id;
    @Value("role_name_1")
    private String roleName;
    @Value("role_note_1")
    private String note;
    /***setter and getter****/
}

@Component
public class RoleImpl_1 implements RoleServer{
    @Autowired
    private Role role = null;
    
    public .....
}

@Component
public class RoleController{
    @Autowired
    @Qualifier("roleImple_2")
    private RoleServer server = null;
    
    public .....
}

@Bean(name = "dataSource")
public DataSource getDataSource(){
    Properties props = new Properties();
    props.setProperty("driver","com.mysql.cj.jdbc.Driver");
    props.setProperty("url","jdbc:mysql://localhost:3306/db");
    ...
    try{
        dataSource = BasicDataSourceFactory.createDataSource(props);
    }catch(Execption e){
        e.printStackTrace();
    }
    return dataSource;
}

@Component
public class RoleController{
    @Autowired(name = "dataSource")
    private DataSource dataSource = null;
    
    public .....
}

<!--dbSource.xml-->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
	<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
	<property name="url" value="jdbc:mysql://localhost:3306/db"/>
    .......
</bean>

@ComponentScan(basePackages={"com.test"})
@ImportResource({"classpath:dbSource.xml"})  //将dbSource.xml配置文件装配到Ioc中来
public class ApplicationConfig{
}

@Component
public class RoleController{
    @Autowired
    private DataSource dataSource = null;
  
    public .....
}

<!--spring-dataSource.xml-->
...........

<!--dbSource.xml-->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
	<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
	<property name="url" value="jdbc:mysql://localhost:3306/db"/>
    .......
</bean>
<import resourse="spring-dataSource.xml"/>

@Component
public class ProfileDataSource{
    //开发环境
    @Bean(name = "devDataSource")
    @Profile("dev")
    public DataSource getDevDataSource(){
        ......
    }
    
    //测试环境
    @Bean(name = "testDataSource")
    @Profile("test")
    public DataSource getTestDataSource(){
        ......
    }
}

//使用@ActiveProfiles激活Profie
@RunWith(SpringJunit4ClassRunner.class)
@ContextConfiguration(classes=ProfileTest.class)
@ActiveProfiles("dev")  //激活开发环境的Profile
public class ProfileTest{
    
}

//使用JVM参数激活Profie
JAVA_OPTS="-Dspring.profiles.active=test"

# dataSource.properties
jdbc.database.driver=com.mysql.cj.jdbc.Driver
jdbc.database.url=jdbc:mysql://localhost:3306/db
.......

@Configuration
@PropertySource(value = {"classpath:dataSource.properties"},{ignoreResourceNotFound=true})
public class ApplicationConfig{
    
}