Programmer Think

Installation of JDK( Baidu Disk Extraction Code: rus0  | Official website)  Configuring environment variables CTRL+R enters sysdm.cpl and then chooses Advanced - > Environment Variables (or right-click the computer - > Properties - > Advanced System Settings - > Environment Variables) ...

Related reading [Xiaojia java] An important leap in the new features of Java 5 (a brief description of the ten new features)[Xiaojia java] New Java 6 features (Ten new features in brief) Chicken ribs upgrade[Xiaojia java] New features of java7 (a brief description of the eight new features) are not hot[Xiaojia java] The new features of java8 (a ...

A large system must be essential for code reuse. It can solve the following problems: Unified Response Processing (Unified Response Object Packaging for Outside) graph LR HTTP-->|HttpRequest|RestController RestController-->|HttpResponse -> JSON|HTTP Unified exception handling (business exceptions can be collected and handled unif ...

Generator code generation Code generation content spring-boot-plus adds param/vo and other templates on the basis of mybatis-plus Extending controller/service/mapper/xml method Purpose New tables in the database can generate background CRUD / paging base code, and swagger! Official address: s ...

Write in front Dear friends and relatives, brothers and sisters of CSDN, I want to kill you! Here should be applause, disappeared nearly two months of Han Xiaodai, I came back, again need applause, the dull finally adapted to the new company's various models (in fact, hands from a 0-1 project). The fo ...

Some Notices for Hadoop Learning (4)-mapreduce Some details about mapreduce If you pack the mapreduce program into liux and run it, Command java - cp xxx.jar main class name If the error is reported, it means that there is a lack of relevant dependent jar packages Use the command hadoop jar xxx.jar class name because when the client main method ...

Maven Basic Knowledge Official website: Portal Maven project structure $ MavenProject |-- pom.xml |-- src | |-- main | | `-- java | | `-- resources | `-- test | | `-- java | | `-- resources `-- README.md POM file The POM file represents the Project Object Model, which is the basic component of working with Maven and is loca ...

Preface: When we read some PDF books, if PDF is not a picture, it is good to take notes of reading; if PDF is a picture, it is impossible to edit and take notes, it is still very painful. I met him. Of course, we have to learn how to solve the current pain points by ourselves. I. Status Quo In order not to repeat the wheel building, of course, ...

Last article mentioned that "i++;" itself is a thread unsafe operation, because the operation is not atomic, there are two processes of value and assignment, but how can it be unsafe? This issue uses a "vmlens" project to demonstrate why thread insecurity occurs. At the end of the paper is a brief introduction to vmlens. Tes ...

20190718 was supposed to do a php verification code, and it turned out that there were no pictures on my macbook, but it was OK on windows! ___________ Judging that the problem lies in the environment! macOS Mojave 10.14.5 WEB: Self-contained apache PHP: Self-contained php 7.1 After a lot of tossing and turning, the final result is: re-insta ...