Spring @Profile注解详解
@Profile注解详解
@Profile:Spring为我们提供的可以根据当前环境,动态的激活和切换一系列组件的功能;
开发环境develop、测试环境test、生产环境master
数据源:(/dev)(/test)(/master)
@Profile:指定组件在哪个环境的情况下才能被注册到容器中,不指定,任何环境下都能注册这个组件
1)加了环境标识的bean,只有这个环境被激活的时候才能注册到容器中。默认是default环境
2)写在配置类上,只有是指定的环境的时候,整个配置类里面的所有配置才能开始生效
packagecom.spring.config;
importjava.beans.PropertyVetoException;
importjavax.sql.DataSource;
importorg.springframework.beans.factory.annotation.Value;
importorg.springframework.context.EmbeddedValueResolverAware;
importorg.springframework.context.annotation.Bean;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.context.annotation.Profile;
importorg.springframework.context.annotation.PropertySource;
importorg.springframework.util.StringValueResolver;
importcom.mchange.v2.c3p0.ComboPooledDataSource;
/**
*Profile:
*Spring为我们提供的可以根据当前环境,动态的激活和切换一系列组件的功能;
*
*开发环境develop、测试环境test、生产环境master
*数据源:(/dev)(/test)(/master)
*
*@Profile:指定组件在哪个环境的情况下才能被注册到容器中,不指定,任何环境下都能注册这个组件
*
*1)加了环境标识的bean,只有这个环境被激活的时候才能注册到容器中。默认是default环境
*2)写在配置类上,只有是指定的环境的时候,整个配置类里面的所有配置才能开始生效
*
*/
@PropertySource("classpath:/dbconfig.properties")
@Configuration
publicclassMainConfigOfProfileimplementsEmbeddedValueResolverAware{
@Value("${db.user}")
privateStringuser;
privateStringdriverClass;
@Profile("default")
@Bean("test")
publicDataSourcetestDataSource(@Value("${db.password}")Stringpassword)throwsPropertyVetoException{
ComboPooledDataSourcedataSource=newComboPooledDataSource();
dataSource.setUser(user);
dataSource.setPassword(password);
dataSource.setDriverClass(driverClass);
returndataSource;
}
@Profile("dev")
@Bean("dev")
publicDataSourcedevDataSource(@Value("${db.password}")Stringpassword)throwsPropertyVetoException{
ComboPooledDataSourcedataSource=newComboPooledDataSource();
dataSource.setUser(user);
dataSource.setPassword(password);
dataSource.setDriverClass(driverClass);
returndataSource;
}
@Profile("master")
@Bean("master")
publicDataSourcemasterDataSource(@Value("${db.password}")Stringpassword)throwsPropertyVetoException{
ComboPooledDataSourcedataSource=newComboPooledDataSource();
dataSource.setUser(user);
dataSource.setPassword(password);
dataSource.setDriverClass(driverClass);
returndataSource;
}
publicvoidsetEmbeddedValueResolver(StringValueResolverresolver){
StringdriverClass=resolver.resolveStringValue("${db.driverClass}");
this.driverClass=driverClass;
}
}
packagecom.spring.test;
importjava.util.Arrays;
importjavax.sql.DataSource;
importorg.junit.Test;
importorg.springframework.context.annotation.AnnotationConfigApplicationContext;
importcom.spring.config.MainConfigOfProfile;
publicclassIOCTestProfile{
//1.使用命令行动态参数:在虚拟机参数位置加载-Dspring.profiles.active=test
//2.使用代码的方式激活某种环境;
@Test
publicvoidtest01(){
AnnotationConfigApplicationContextapplicationContext=newAnnotationConfigApplicationContext(MainConfigOfProfile.class);
//1.创建一个applicationContext
//2.设置需要激活的环境
applicationContext.getEnvironment().setActiveProfiles("dev","master");
//3.注册主配置类
applicationContext.register(MainConfigOfProfile.class);
//4.启动刷新容器
applicationContext.refresh();
String[]beanNamesForType=applicationContext.getBeanNamesForType(DataSource.class);
System.out.println(Arrays.toString(beanNamesForType));
applicationContext.close();
}
@Test
publicvoidtest02(){
AnnotationConfigApplicationContextapplicationContext=newAnnotationConfigApplicationContext(MainConfigOfProfile.class);
String[]beanNamesForType=applicationContext.getBeanNamesForType(DataSource.class);
System.out.println(Arrays.toString(beanNamesForType));
applicationContext.close();
}
}
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