Spring Cacheable 数组KEY解决办法

问题:当使用Cacheable 的入参是一个数组的时候,发现KEY生成逻辑困难


@Cacheable(value =  "sampleCache" )
    public String innerCache(String[] ids)

方案0: 不写Key,正常缓存,没问题,但觉得和其它代码不统一,尝试写一个
方案1:,key=“T(java.util.Arrays).asList(#ids).hashCode()” 无效
方案2:通过自定义keyGenerator 实现,能够正常

 @Cacheable(value =  "sampleCache",keyGenerator = "customKeyGenerator")
    public String innerCache(String[] ids){
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import java.lang.reflect.Method;

@Component
public class CustomKeyGenerator implements KeyGenerator {
    @Override
    public Object generate(Object target, Method method, Object... params) {
        return   StringUtils.arrayToDelimitedString((String[])params[0], "_");
    }

}

参考文档:https://www.baeldung.com/spring-cache-custom-keygenerator
https://docs.spring.io/spring-framework/docs/3.2.x/spring-framework-reference/html/cache.html
https://www.baeldung.com/spring-cache-custom-keygenerator

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