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Contents of this article preface Since the launch of Mybatis plus, more and more companies have chosen the Mybatis plus framework to replace the persistence layer framework Mybatis in their own projects. Because Mybatis plus not only has the flexibility of handwritten complex sql statements of Mybatis, but also has the general framework met ...

Catalog view resolver Exception Handler Interceptor File Upload JSON data interaction RESTful support view resolver         View Parser: Add the page path section to the configuration file                    No View Parser return "/WEB-INF/show01.jsp";         With ...

1, Bracket matching problem 1. Title Requirements:     2. General idea After traversing the string, if it is an open parenthesis, let it enter the stack. If it is a right parenthesis, let it match the top element of the stack (provided that there are elements in the stack). If the matching is successful, let the top element out of th ...

catalogue MyBatis environment initialization summary Create project module Add project dependency Mybatis simple configuration implementation. Create project startup class Environment test code implementation Announcement data layer MyBatis practice Business description Pojo class design Dao interface and method Implementation and a ...

Introduction The other day, a friend asked me what the following code would do. public class Main { public static void main(String[] args) { Integer i1 = null; System.out.println(i1 == 1); } } I said I would say NPE (NullPointerException) null pointer exception, although it does report null pointer exception after ex ...

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0 thread First, explain the whole plan, which is divided into two parts to automatically generate the required code, compile and download, and verify the correctness of the code It is hoped that through such an automatic way, the repeated labor can be reduced in the chip composite pin test, and the automatic code generation IDE can be imp ...

1, Timer There is a Timer class under the java.util package, which is used to implement scheduled tasks 1. Code test Code implementation steps: 1. Create a timer object 2. Call the schedule polymorphic method of timer object and select the way to execute the task according to the different incoming parameters The first te ...

preface This article belongs to the C# zero foundation introduction hundred knowledge hundred examples series. This series of articles aims to provide a systematic learning path for children's shoes learning C# language. This series of articles will be presented in the form of [knowledge points] [exercises]. If you have any questions, y ...

  This paper briefly introduces the concept of tree. The more important are the implementation of heap, heap sorting, TOP-K problem, traversal of binary tree (pre, middle, post order and sequence traversal) and the implementation of binary tree function catalogue 1, Concept and structure of tree 1.1 concept of tree 1.2 representation o ...