Spring集成-如何使用SpEL在注释基础上过滤消息?

您可以使用Java DSL。。。

@Bean
public IntegrationFlow filteringFlow() {
    return IntegrationFlows.from("someChannel")
            .filter("#jsonPath(...) matches ...")
            .channel("outChannel")
            .get();
}

或者用bean配置它。。。

@Bean
@ServiceActivator(inputChannel = "someChannel")
public MessageHandler filter() {
    MessageFilter filter = new MessageFilter(selector());
    filter.setOutputChannelName("outChannel");
    return filter;
}

@Bean
public MessageSelector selector() {
    return new ExpressionEvaluatingSelector("#jsonPath(...) matches ...");
}