Programmer Group

6. pd-tools-dozer The PD tools dozer module is positioned as object conversion. Its essence is a Spring Boot starter. Other modules can directly import this module to complete object conversion. 6.1 dozer introduction dozer is a java bean to Java Bean mapper that recursively copies data from one object to another. dozer is a tool for attribute ...

Batch replace string specified in MarkDown document preface Recently, I bought a new computer. It took almost a weekend to upgrade various configurations. At the same time, I want to import the previous blog documents. Because the blog documents are written in Typora, and the pictures are also stored locally. After the picture path change ...

return and job management of SaltStack Experimental environment master192.168.200.142node1192.168.200.147node2192.168.200.145 1. return of saltstack component The return component can be understood as the SaltStack system stores or returns the data returned by Minion to other programs. It supports a variety of storage methods, such as MySQL, ...

[note]: the data of two books are loaded here, both of which are mentioned in Li Mu's divine book. Since the code encapsulated by Mu Shen is loaded Time machine, I copied the code of the previous two blogs here to load the Star Wars dataset. The following content is a reproduction of Mu God's curriculum and code. I will mark the knowledge p ...

preface Concurrent programming technology is an important knowledge point in Java. How much do you know about the following? Overview of process, thread and collaboration relationship Process: in essence, it is an independently executed program. Process is the basic concept of resource allocation and scheduling by the operating system. T ...

This way to achieve code scanning login is too sweet!!! If you need more tutorials, just scan the code on wechat           1, First you need a table Record who scanned the code. Who logged in. User_Token table The fields are as follows: uuid: used to ensure uniqueness userId: who logged in loginTime: login time createTime: the c ...

In some systems, there is a problem of creating a large number of identical or similar objects. If you use the traditional constructor to create objects, it will be more complex, time-consuming and resource-consuming. It is very efficient to generate objects with the prototype mode, just as it is as simple as the monkey king pulling out the mon ...

1, Introduction to JQuery (1) Introduction          JQuery is a fast and concise JavaScript framework. The purpose of jQuery design is "write Less, Do More", which advocates writing less code and doing more things. It encapsulates the common functional code of JavaScript, provides a simple Jav ...

Recursion and recursion (2) 1.Simple Fibonacci The following sequence 0 1 1 2 3 5 8 13 21... Is called Fibonacci sequence. This sequence starts with Item 3, and each item is equal to the sum of the first two items. Enter an integer N, please output the first N items of this sequence. Input format An integer N. Output format Output the fir ...

1, Compression optimization designWhen running MapReduce program, disk I/O operation, network data transmission, shuffle and merge take a lot of time, especially in the case of large data scale and intensive workload. Since disk I/O and network bandwidth are valuable resources of Hadoop, data compression is very helpful to save resources and mi ...