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Time record April 21, 2020 Preface       At present, the project reconstruction adopts springboot2.1.13 to integrate mybatis-plus3.1.2 and druid connection pool 1.1.20. When the response body json result set and the request body json result set are returned in the controller controller controller, both serialization and dese ...

Hello, brothers, this time to exchange two questions with the old fellow, exception and parameter checking. Before we talk about parameter checking, let's first talk about exception handling, because the latter parameter checking involves exception handling. exception handling When it comes to exception handling, I don't know if you've written ...

History is a mirror Looking back on my own development and witnessing the history of times, let me talk about how java connects to databases 0 native jdbc Get started with jdbc, so people who are afraid of new entrants will already be immersed in packaging libraries and frameworks without even using native jdbc. Java database connecti ...

Threads, as the smallest dispatching unit in the operating system, generally have multicore processors in the current operating environment. In order to make better use of CPU, master its correct use, and make the program run more efficiently.It is also an extremely important module in Java interviews. Introduction to Threads A program that ...

Background: too many splices in boo query result in too many clauses: maxclausecount is set to 1024 { "from": 0, "size": 10, "query": { "bool": { "must": [ { "terms": { "idx_diseaseid": [ "DiseaseId_1027" ], "boost": 1 } }, ...

Original link: http://www.yiidian.com/servlet/filter-config.html The Web container creates an object for FilterConfig. This object can be used to get the configuration information of the Filter from the web.xml file. 1. Method of filterconfig interface There are four methods in the FilterConfig interface: public void init (FilterConfig config) ...

First of all, Minio has written clearly and in Chinese on its website. https://docs.min.io/cn/ In the project, the OSS function needs to be replaced and implemented. The code corresponding to the original public cloud implementation has been encapsulated into a tool class, and the factory method mode is adopted. As long as the mini interface a ...

Category Column: spring statemachine Article Tag: spring boot spring Statemachine Java state machine Copyright Statement: This is an original blogger article, which follows the CC 4.0 BY-SA copyright agreement. Please attach a link to the original source and this statement for reproduction. Link to this article: https://blog.csdn.net/firebat/ar ...

In the last article about Iterators, generators, and collaborators in PHP In our article, we know that in PHP, we can use the yield keyword to turn the iterator into a generator, and then through its release / recovery mechanism, we can use the cooperation mechanism to schedule in the user state. Next, we use the PHP cooperation mechanism to do ...

Preface With the development of blockchain technology, more and more enterprises and individuals begin to combine blockchain with their own business. The unique advantages of blockchain, such as transparent and tamper proof data, can bring convenience to business. But at the same time, there are some hidden dangers. The data is open and transp ...