java - Spring @ConditionalOnProperty havingValue = "value1"或 "value2"

Question

I am looking for configurationOnProperty usage where I can specify to consider more than one value as shown below

Eg: @ConditionalOnProperty(value = "test.configname", havingValue = "value1"or "value2")

或

I would like to know if it is possible to specify confiugrationOnProperty with condition of havingValue != "value3"

Eg: @ConditionalOnProperty(value = "test.configname", havingValue != "value3")

Please let me know if there is a way to achieve any one of the above in spring boot configuration.

Answer 1

Spring Boot 提供 AnyNestedCondition for 创建了一个条件，该条件将在任何嵌套条件匹配时匹配。它还提供AllNestedConditions和 NoneNestedConditions用于分别匹配所有嵌套条件或不匹配任何嵌套条件时的匹配。

对于您想要匹配 value1 或 value2 值的特定情况，您可以创建一个 AnyNestedCondition，如下所示:

class ConfigNameCondition extends AnyNestedCondition {

    public ConfigNameCondition() {
        super(ConfigurationPhase.PARSE_CONFIGURATION);
    }

    @ConditionalOnProperty(name = "test.configname", havingValue = "value1")
    static class Value1Condition {

    }

    @ConditionalOnProperty(name = "test.configname", havingValue = "value2")
    static class Value2Condition {

    }

}

然后将它与@Conditional 一起使用，例如:

@Bean
@Conditional(ConfigNameCondition.class)
public SomeBean someBean() {
    return new SomeBean();
}

如嵌套条件注释的 javadoc 中所示(链接到上面)，嵌套条件可以是任何类型。在这种特殊情况下，它们不需要都属于同一类型。