Spring详解（三）

以你之姓@ 2023-01-11 08:33 112阅读 0赞

/\* \* Spring提供的Profile： \* 可以根据当前环境，动态的激活和切换一系列的组件的功能 \* 见myProfileConfig.java \* @Profile（value=“环境名称”）：指定组件在哪个环境的情况下才能被注册到容器中；默认不指定，任何环境下都能注册这个组件 \* 默认的环境名称：default \* 因为@Profile的目标是：@Target(\{ElementType.TYPE, ElementType.METHOD\}) \* 所以可以标识在方法上，也可以标识在类上 \*/  
myProfileConfig.java： @PropertySource(“classpath:jdbcConfig.properties”) @Configuration public class myProfileConfig implements EmbeddedValueResolverAware \{ @Value(" d b . u s e r " ) p r i v a t e S t r i n g u s e r ; p r i v a t e S t r i n g V a l u e R e s o l v e r e m b e d d e d V a l u e R e s o l v e r ; p r i v a t e S t r i n g r e s o l v e S t r i n g V a l u e ; / / 默 认 环 境 ： / / @ P r o f i l e ( " d e f a u l t " ) / / 测 试 环 境 @ P r o f i l e ( " t e s t " ) @ B e a n ( " d a t a S o u r c e T e s t " ) p u b l i c D a t a S o u r c e d a t a S o u r c e T e s t ( @ V a l u e ( " \{db.user\}") private String user; private StringValueResolver embeddedValueResolver; private String resolveStringValue; //默认环境： //@Profile("default") // 测试环境 @Profile("test") @Bean("dataSourceTest") public DataSource dataSourceTest(@Value(" db.user")privateStringuser;privateStringValueResolverembeddedValueResolver;privateStringresolveStringValue;//默认环境：//@Profile("default")//测试环境@Profile("test")@Bean("dataSourceTest")publicDataSourcedataSourceTest(@Value("\{db.password\}")String pwd) throws PropertyVetoException \{ ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource(); comboPooledDataSource.setUser(user); comboPooledDataSource.setPassword(pwd); comboPooledDataSource.setDriverClass(resolveStringValue); comboPooledDataSource.setJdbcUrl(“jdbc:mysql://127.0.0.1:3307/test3307”); return null; \} // 开发环境 @Profile(“dev”) @Bean(“dataSourceDev”) public DataSource dataSourceDev(@Value(" d b . p a s s w o r d " ) S t r i n g p w d ) t h r o w s P r o p e r t y V e t o E x c e p t i o n C o m b o P o o l e d D a t a S o u r c e c o m b o P o o l e d D a t a S o u r c e = n e w C o m b o P o o l e d D a t a S o u r c e ( ) ; c o m b o P o o l e d D a t a S o u r c e . s e t U s e r ( u s e r ) ; c o m b o P o o l e d D a t a S o u r c e . s e t P a s s w o r d ( p w d ) ; c o m b o P o o l e d D a t a S o u r c e . s e t D r i v e r C l a s s ( r e s o l v e S t r i n g V a l u e ) ; c o m b o P o o l e d D a t a S o u r c e . s e t J d b c U r l ( " j d b c : m y s q l : / / 127.0.0.1 : 3307 / w f c h a t " ) ; r e t u r n n u l l ; / / 生 产 环 境 @ P r o f i l e ( " p r o d " ) @ B e a n ( " d a t a S o u r c e P r o d " ) p u b l i c D a t a S o u r c e d a t a S o u r c e P r o d ( @ V a l u e ( " \{db.password\}")String pwd) throws PropertyVetoException \{ ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource(); comboPooledDataSource.setUser(user); comboPooledDataSource.setPassword(pwd); comboPooledDataSource.setDriverClass(resolveStringValue); comboPooledDataSource.setJdbcUrl("jdbc:mysql://127.0.0.1:3307/wfchat"); return null; \} // 生产环境 @Profile("prod") @Bean("dataSourceProd") public DataSource dataSourceProd(@Value(" db.password")Stringpwd)throwsPropertyVetoExceptionComboPooledDataSourcecomboPooledDataSource=newComboPooledDataSource();comboPooledDataSource.setUser(user);comboPooledDataSource.setPassword(pwd);comboPooledDataSource.setDriverClass(resolveStringValue);comboPooledDataSource.setJdbcUrl("jdbc:mysql://127.0.0.1:3307/wfchat");returnnull;//生产环境@Profile("prod")@Bean("dataSourceProd")publicDataSourcedataSourceProd(@Value("\{db.password\}")String pwd) throws PropertyVetoException \{ ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource(); comboPooledDataSource.setUser(user); comboPooledDataSource.setPassword(pwd); comboPooledDataSource.setDriverClass(resolveStringValue); comboPooledDataSource.setJdbcUrl(“jdbc:mysql://127.0.0.1:3307/wfchatappdata”); return null; \} @Override public void setEmbeddedValueResolver(StringValueResolver resolver) \{ this.embeddedValueResolver=resolver; resolveStringValue = embeddedValueResolver.resolveStringValue("$\{db.driver\}"); \} \}  
可以通过前几章介绍的切换环境的方式测试效果！