- 博客(8)
- 收藏
- 关注
原创 Mysql实现日期排序null记录放前后
null在前面#field1与field2同一个字段ORDER BY NOT ISNULL(field1), field2 ASC|DESCnull在后面#field1与field2同一个字段ORDER BY ISNULL(field1), field2 ASC|DESC
2020-11-17 11:09:16
964
原创 SpringMVC调接口报错:No converter found for return value of type
org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type: class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessag
2020-10-14 11:47:00
336
原创 企业微信(创建群聊会话)60011错误
微信企业调创建群聊会话接口遇到的错误:{ “errcode”: 60011, “errmsg”: “no privilege to access/modify contact/party/agent , hint: [1592208279_79_2afcb2fb3a784dbe93c228fc748f2746], from ip: 100.66.97.245, more info at https://open.work.weixin.qq.com/devtool/query?e=60011” }说明:
2020-06-15 16:12:27
4886
2
原创 关于Mysql的EXISTS/NOT EXISTS字段使用注意
说明:EXISTS 用于判断查询子句是否有记录,如果有一条或多条记录存在返回 True,否则返回 False。注意事项:当查询有多个条件时,EXISTS条件要放在最后
2020-05-29 11:05:23
872
原创 idea同时打开多个同一个文件
前提:一个文件内容太多,想同时查看页首与页尾不同方法的代码。打开idea设置,快捷键设置,输入:Open In New Editor window然后选中文件,按快捷键即可。
2020-05-28 17:48:44
3057
原创 mysql多表联合修改表记录时,需要指定别名
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column ‘cust_id’ in field list is ambiguous; Column ‘cust_id’ in field list is ambiguous; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationExce
2020-05-26 14:24:39
406
原创 java.lang.IllegalArgumentException: invalid comparison: java.util.ArrayList and java.lang.String的问题
:nested exception is org.apache.ibatis.exceptions.PersistenceException:Error querying database. Cause: java.lang.IllegalArgumentException: invalid comparison: java.util.ArrayList and java.lang.StringCause: java.lang.IllegalArgumentException: invalid com
2020-05-21 15:28:38
361
原创 springboot2.1.6 quartz定时任务启动报错
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘quartzScheduler’ defined in class path resource [org/springframework/boot/autoconfigure/quartz/QuartzAutoConfiguration.class]: Invocation of init method failed; nested
2020-05-16 19:00:40
1893
1
空空如也
空空如也
TA创建的收藏夹 TA关注的收藏夹
TA关注的人