csdn_hshdcxy的博客

原创 mybatis plus强大的条件构造器queryWrapper

原创 jasonObject类获取指定值

“FPGdsCurrency”: { “imagename”: “”, “locations”: [ [ 2735, 1454 ], [ 2908, 1454 ], [ 2908, 1477 ], [ 2735, 1477 ] ], “value”: “美元” }, JSONObject json = new JSONObject(); String str = json.getJSONArray(“FPGdsCurrency”).getString(“value”); ...

原创 node.js 安装npm install报错

npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! node-sass@4.13.1 postinstall: node scripts/build.js npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the node-sass@4.13.1 postinstall script. npm ERR! This is probably not a problem with npm. There is li

原创 MySQL，查询最近一个月每天的最后一条数据

测试数据 查询sql语句如下 select max(aa.rq) as MaxcreateTime ,aa.result,aa.xulie from ( select convert(a.rq,CHAR(10)) datetemp,a.rq,a.result,a.xulie from test a where DATE_SUB(CURDATE(), INTERVAL 1 MONTH) <= date(a.rq) GROUP BY a.rq ORDER BY a.xulie desc ) as aa