Spring动态修改bean属性配置key的几种方法

@Configuration
@ConfigurationProperties(prefix = "datasource")
public class DataSourceConfig {
    private String url;
    private String username;
    private String password;
    
    // getters和setters...
}

# application.properties
datasource.url=jdbc:mysql://localhost:3306/test
datasource.username=root
datasource.password=123456

public class DynamicConfigPostProcessor implements EnvironmentPostProcessor {
    @Override
    public void postProcessEnvironment(ConfigurableEnvironment environment, 
                                     SpringApplication application) {
        // 获取当前环境
        String env = environment.getActiveProfiles()[0];
        
        // 动态修改配置前缀
        String prefix = "datasource." + env;
        environment.getPropertySources().addFirst(
            new MapPropertySource("dynamic-datasource", 
                Collections.singletonMap("datasource.url", 
                    environment.getProperty(prefix + ".url"))));
        // 其他属性同理...
    }
}

org.springframework.boot.env.EnvironmentPostProcessor=\
com.example.DynamicConfigPostProcessor

public class DynamicPropertyResolver extends PropertySourcesPlaceholderConfigurer {
    @Override
    protected String resolvePlaceholder(String placeholder, PropertySources propertySources) {
        if (placeholder.startsWith("datasource.")) {
            String env = determineCurrentEnvironment();
            return super.resolvePlaceholder(
                placeholder.replace("datasource", "datasource." + env), 
                propertySources);
        }
        return super.resolvePlaceholder(placeholder, propertySources);
    }
    
    private String determineCurrentEnvironment() {
        // 实现你的环境判断逻辑
        return "test"; // 示例返回测试环境
    }
}

@Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigurer() {
    return new DynamicPropertyResolver();
}

@Configuration
public class DynamicDataSourceConfig {
    
    @Bean
    @ConditionalOnExpression("'${spring.profiles.active}' == 'test'")
    @ConfigurationProperties(prefix = "datasource.test")
    public DataSourceProperties testDataSourceProperties() {
        return new DataSourceProperties();
    }
    
    @Bean
    @ConditionalOnExpression("'${spring.profiles.active}' != 'test'")
    @ConfigurationProperties(prefix = "datasource.prod")
    public DataSourceProperties prodDataSourceProperties() {
        return new DataSourceProperties();
    }
}

@Configuration
public class DynamicConfig {
    
    @Autowired
    private Environment env;
    
    @Bean
    public DataSourceConfig dataSourceConfig() {
        String envPrefix = env.getActiveProfiles()[0];
        return new DataSourceConfig() {
            @Override
            public String getUrl() {
                return env.getProperty("datasource." + envPrefix + ".url");
            }
            // 其他属性同理...
        };
    }
}