随笔分类 -  java

hive 备忘录
摘要：查看指定库表的分区信息 > show partitions dev.black_cat_list; pt=2019-01-20 阅读全文
posted @ 2020-06-23 17:03 brookin 阅读(196) 评论(0) 推荐(0)
java 中 正则 matches vs find
摘要：find()方法在部分匹配时和完全匹配时返回true,匹配不上返回false; matches()方法只有在完全匹配时返回true,匹配不上和部分匹配都返回false。 阅读全文
posted @ 2019-03-04 22:28 brookin 阅读(371) 评论(0) 推荐(0)
utf8 vs utf8mb4
摘要：UTF-8 is a variable-length encoding. In the case of UTF-8, this means that storing one code point requires one to four bytes. However, MySQL's encodin 阅读全文
posted @ 2019-03-04 11:45 brookin 阅读(435) 评论(0) 推荐(0)
Java package can not import alias
摘要：you can not do "import x as y;" in Java. What you CAN do is to extend the class, or write a wrapper class for it, and import that one instead. 阅读全文
posted @ 2019-02-22 15:53 brookin 阅读(421) 评论(0) 推荐(0)
java String[] 初始化
摘要：String[] 初始化 阅读全文
posted @ 2019-01-12 19:47 brookin 阅读(20921) 评论(0) 推荐(0)
java json Gson
摘要：引入 Gson 到 pom.xml 示例代码 阅读全文
posted @ 2018-12-27 17:35 brookin 阅读(183) 评论(0) 推荐(0)
xmlns:dubbo 路径错误
摘要：It goes normal when change to dubbo config spring 2.6.1.jar META INF spring.handlers 中的配置的是之前的域名 code.alibabatech.com , 而现在在github上下载的dubbo 代码里面却是: du 阅读全文
posted @ 2018-12-13 17:16 brookin 阅读(406) 评论(0) 推荐(0)
gradle
摘要：参考 https://www.jianshu.com/p/001abe1d8e95 https://www.jianshu.com/p/ee26b34313ef https://www.jianshu.com/p/743dd5208ce8 "项目自动化建构工具gradle 系列" 阅读全文
posted @ 2018-12-13 17:12 brookin 阅读(146) 评论(0) 推荐(0)