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I have written the strategic logic for several months, which is a bit silly. To do database and table splitting, it took almost a day to use the simplest Mybatis in spring boot. The ability to solve macro problems has declined a lot after a long time in logic details. To use Mybatis in spring boot, you need to do the following steps: 1. use S ...

1. Create WEB project The community version does not have the function of creating a web project, so it can only create a maven web project. Here, the enterprise version of cracking is used. 1.1 creation steps File-New-Project In the pop-up window, select Java Enterprise - project SDK - Java EE ...

We may encounter the upload of large files in our work. If we transfer them once, we may encounter various problems such as network and timeout. Here, we will introduce the scheme in two ways: fragment upload and breakpoint continue transfer. 1, Slice upload Principle of fragment upload: the front end f ...

I met this problem last time when I was working on a personal blog project. Now let's write down the solution steps IDE: IDEA Language: java Framework: spring boot Template engine: thymeleaf 1, See the effect1. Picture submission2. Picture display2, Design process 1.pom.xml <dependency> <g ...

The new requirements need to make some customized things on log4j, so the log4j2 is supplemented To configure Let's look at the traditional configuration of log4j2 <?xml version="1.0" encoding="UTF-8"?> <Configuration status="WARN"> <properties> <property name="log_path"&gt ...

In Java engineering projects, we often use the Mybatis framework to add, delete, query and modify the data in the database. Its principle is to encapsulate JDBC and optimize the connection of data sources. Let's review the process of JDBC operating database. JDBC operation database When JDBC operates the database, you need to specify the co ...

We start from six aspects: plug-in configuration, plug-in writing, plug-in operation principle, plug-in registration and interception time, initialization plug-in, paging plug-in principle. 1. Plug in configuration Mybatis plug-ins are configured in the configuration. During initialization, these plug ...

Spring Boot+mybatis create multi data source connection 1, Background: the company system needs to do heterogeneous database data migration, need to configure multiple data sources, there are also some small problems in the configuration process, so make a record here; 2, Code address: 3, Code exp ...

According to the different levels of abstraction, factory pattern can be divided into three types: simple factory pattern (also known as static factory pattern), factory method pattern described in this paper, and abstract factory pattern. Advantages of factory mode: It can make the code structure cle ...

Article Directory 1 Source Entry Interpretation of core source code of 2 sqlSession.getMapper(...) method 2.1 What should be analyzed without looking at the source code 2.2 [Source Code Analysis] Get the MapperProxyFactory object corresponding to TUserMapper 2.3 [Source Code Analysis] Use dynamic pr ...