Java

Java realization PDF Online preview ( Four methods )

@RequestMapping("/preview1") public void er(HttpServletResponse response){ File file = new File("G:\\ desktop \\Thymeleaf3.0 Chinese tran...
2019-07-22 18:14 views 25

log4j Method of printing exception stack information

When using log4j Time , If we call logger.info("123"); There is only one line , Even if the parameter is a Exception object , It's just that the i...
2019-07-16 15:07 views 38

realization LRU Cache（java edition ）

LRU algorithm , Also known as the least recently used algorithm , We can use this algorithm to implement cache mechanism , Simply put, it is to cac...
2019-07-07 09:57 views 89

shardingsphere Case application

shardingSphere The application of precise slicing and complex slicing . Order form actual table DDL as follows ：CREATE TABLE `t_order_06` ( `id` b...
2019-06-11 20:49 views 74

How to learn Spring ? study Spring What to learn before ?

finish studying java What knowledge should be mastered after the first volume of core technology to learn spring? finish studying Java Basics , Wa...
2019-06-04 08:44 views 33

Vue + ElementUI Used in the project vue-pdf Realize simple Preview

Vue + ElementUI Used in the project vue-pdf Realize simple Preview 1, install vue-pdfnpm install --save vue-pdf2, stay vue Page to import the co...
2019-05-10 10:29 views 27

Java The generics of , What is generics ? Why use generics ?（ A detailed explanation of generics ）

1. Why are there generics ? Early Object Type can accept any object type , But in practical use , There will be the problem of type conversion , Th...
2019-04-29 00:10 views 27

ergodic HashMap Four methods of

stay Map In the set values(): Method is to get all the values in the collection ---- There is no key , There is no correspondence ,KeySet(): take ...
2019-04-26 15:27 views 43

Java Interview questions -- Programming questions

If a string of characters such as "aaaabbc China 1512" The number of English characters should be counted separately , Number of Chinese character...
2019-04-07 13:12 views 22

Java Interview questions -- search (solr&elasticsearch)

Elasticsearch Advantages and disadvantages of ： advantage ：1.Elasticsearch It's distributed . No other components are required , Distribution is re...
2019-04-07 12:24 views 36
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