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1.xml文件报错:“The prefix "context" for element "context:property-placeholder" is not bound. ” 报错行数内容 <context:property-placeholder location="classpath:mo 阅读全文
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1.web项目首先回去读取web.xml. web.xml中有如下配置 <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:/spring-context*.xml</param 阅读全文
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db.businessLog.aggregate([{$group:{_id:"$createDatetime",totalsum:{$sum:1}}}]),分组查询 db.businessLog.aggregate([{$group:{_id:{year:{$year:'$createDateti 阅读全文