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Preface As mentioned in the previous article How MyBatis builds configuration classes Yes, I also said that MyBatis is mainly divided into two phases in the running process, the first is building, the second is executing, so this article will take you to see how MyBatis goes from building to executing our first SQL statement.This part of the co ...

Handle conversion of Date type fields to timestamps in Databases There are two ways to solve the date conversion Json problem: 1. (Not recommended) Local modification, custom annotation to convert date type to Date type. 2. (strongly recommended) Global modification, configure in XML (Spring MVC) or in Application.Java startup classes (Spring b ...

menu menus and windows System menu OptionsMenu Code display Effect display Matters needing attention Context menucontextmenu Code display Effect display Matters needing attention Pop-up Menu Code display Effect display PopupWindow window Code display Effect display Matters needing attention ...

MyBatis part2 Article directory MyBatis part2 Many to one processing One to many processing Dynamic SQL IF chooose(when,otherwise) trim(where,set) Foreach Before knowing many to one and one to many, the feeling after learning is like learning the joint table query in MySQL statements (there ...

Preface Some time ago, when I was doing project development, I encountered several small problems in Fragment management. I always felt that the encapsulated Fragment manager was not elegant at this stage. This has become the Navigation library that I am determined to learn from Jetpack, which was lau ...

I try to use marginBottom on listView to make room between listView items, but they are still attached together. Is it possible if so, is there a specific way to do it? My code is as follows <LinearLayout android:id="@+id/alarm_occurences" android:layout_width="fill_parent" android:orientation="vertical" android:layout_height="fill ...

First of all, in the context of this new project, the docking Party's high cold exception, all the requests and returns are in XML format, so I'm very tired. At present, the company doesn't have any well packaged network request package. Thinking of the RXjava used in the past, it just picked it up a ...

Version information Android Studio: (Android Studio-Help-About) Unity: (Unity-Help-About Unity) Note: Latest version of China Enhanced Edition (time: 2020-02-20) Install Android module 1, Operations in Unity 1. Create a Unity project and prepare a Unity game. Recommended tutorials: Introduction ...

Servlet Servlet is the foundation of JSP (Java Servlet Pages), which is essentially a Java class running on the server side, receiving requests from clients and responding. Tomcat's containers are divided into four levels: Container, Engine, Host and Servlet. The relationship is as follows The s ...

brief introduction spring The interface class of asynchronous thread pool, whose essence is Java.util.concurrent.Executor Spring has implemented exception thread pool: 1. SimpleAsyncTaskExecutor: it is not a real thread pool. This class does not reuse threads. Each call will create a new thread.   2. SyncTaskExecutor: this class does not ...