Could not resolve placeholder 'redis.pool.maxTotal' in string value "${redis.pool.maxTotal}"

在配置文件中，路径没有错，也有对应的keyvalue但是会报错

<context:property-placeholder ignore-unresolvable="true"location="classpath:resource/application.properties" />

ignore-unresolvable="true"

必须加上，每个配置文件都不能漏