spring切换环境变量——@Profile注解的使用

public AnnotationConfigApplicationContext(Class<?>... annotatedClasses) {
   this();
   register(annotatedClasses);
   refresh();
}

/**
 * 容器配置类
 * 用于测试@Profile注解
 */
@Configuration
@PropertySource(value = {"classpath:/dbconfig.properties"})
public class ProfileBeanConfig implements EmbeddedValueResolverAware {

    //数据库连接用户名
    @Value(value = "${jdbc.username}")
    private String username;
    //数据库连接密码
    private String password;

    //开发环境数据源
    @Bean(value = "dataSourceDev")
    @Profile(value = "dev")
    public DataSource dataSourceDev(@Value("${jdbc.driverClass}") String driverClass) throws PropertyVetoException {
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setUser(this.username);
        comboPooledDataSource.setPassword(this.password);
        comboPooledDataSource.setDriverClass(driverClass);
        comboPooledDataSource.setJdbcUrl("jdbc:mysql://localhost:3306/dev");
        return comboPooledDataSource;
    }

    //测试环境数据源
    @Bean(value = "dataSourceTest")
    @Profile("test")
    public DataSource dataSourceTest(@Value("${jdbc.driverClass}") String driverClass) throws PropertyVetoException {
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setUser(this.username);
        comboPooledDataSource.setPassword(this.password);
        comboPooledDataSource.setDriverClass(driverClass);
        comboPooledDataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");
        return comboPooledDataSource;
    }

    //生产环境数据源
    @Bean(value = "dataSourceProduction")
    @Profile("production")
    public DataSource dataSourceProduction(@Value("${jdbc.driverClass}") String driverClass) throws PropertyVetoException {
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setUser(this.username);
        comboPooledDataSource.setPassword(this.password);
        comboPooledDataSource.setDriverClass(driverClass);
        comboPooledDataSource.setJdbcUrl("jdbc:mysql://localhost:3306/production");
        return comboPooledDataSource;
    }

    //获取字符串解析器
    @Override
    public void setEmbeddedValueResolver(StringValueResolver resolver) {
        //解析配置文件，然后对数据库连接密码进行赋值
        this.password = resolver.resolveStringValue("jdbc.password");
    }
}

//创建匿名容器
AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
//设置环境,其值为@Profile注解的属性值
applicationContext.getEnvironment().setActiveProfiles("test");
//注册容器类
applicationContext.register(ProfileBeanConfig.class);
//刷新容器
applicationContext.refresh();